CN107330581B - Agricultural product quality information system based on block chain - Google Patents
Agricultural product quality information system based on block chain Download PDFInfo
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- CN107330581B CN107330581B CN201710425740.3A CN201710425740A CN107330581B CN 107330581 B CN107330581 B CN 107330581B CN 201710425740 A CN201710425740 A CN 201710425740A CN 107330581 B CN107330581 B CN 107330581B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/018—Certifying business or products
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- G—PHYSICS
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- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/02—Agriculture; Fishing; Mining
Abstract
A blockchain-based agricultural product quality information system, comprising: the device comprises a data acquisition module, a block information construction module, a storage sharing module, an evaluation module and a query module, wherein: the data acquisition module acquires soil information and agricultural product type information and transmits the soil information and the agricultural product type information to the block information construction module in a structured data form; the block information construction module distributes an identity label to the agricultural product, constructs the received structured data into a Merkle tree, performs digital signature and timestamp service to form block information, and transmits the block information through p2p after workload certification; the storage sharing module broadcasts the block information after carrying out workload verification and data check on the received block information; the evaluation module evaluates the quality of the agricultural products according to the block information to obtain a quality score; the query module receives the block information and the quality scores to generate a query two-dimensional code.
Description
Technical Field
The invention relates to a technology in the field of information processing, in particular to an agricultural product quality information system based on a block chain.
Background
With the development of society and economy, the quality requirements of people on agricultural products are higher and higher, and the current situation of the quality safety of the agricultural products is worried. The pollution of three wastes in industry to agricultural production environment, and the use of a large amount of fertilizers, pesticides, herbicides and the like by some farmers for increasing the yield and income cause pesticide residues in agricultural products and processed products thereof in many places in China. China is a typical large-market and small-production mode, and has low productivity level, weak industrialization degree and poor standardization degree. Farmers have no awareness and ability to integrate into the product standardization system. Meanwhile, the quality grade of the agricultural products is not evaluated by a unified standard and method, and the individual detection and analysis of each agricultural product are not practical.
The block chain technology is based on the technology of bit coins, and forms an application technology paradigm which is mainly characterized by a distributed general ledger, consensus trust, asymmetric encryption, intelligent contracts and timestamps through continuous development and evolution. Most importantly, blockchains allow people to build confidence in mutual collaboration without a central authority, which is the product of solving the trust problem mathematically.
Disclosure of Invention
Aiming at the defects that only the source of an article can be traced and the quality grade of the product cannot be evaluated and classified in the prior art, the invention provides the block chain-based agricultural product quality information system, introduces the block chain technology, enables the growth data of the agricultural product to be difficult to modify artificially, constructs an authoritative uniform agricultural product quality information system, and is beneficial to the electronic commerce of the agricultural product.
The invention is realized by the following technical scheme:
the invention comprises the following steps: the device comprises a data acquisition module, a block information construction module, a storage sharing module, an evaluation module and a query module, wherein: the data acquisition module acquires soil information and agricultural product type information and transmits the soil information and the agricultural product type information to the block information construction module in a structured data form; the block information construction module distributes an identity label to the agricultural product, constructs the received structured data into a Merkle tree, performs digital signature and timestamp service to form block information, and transmits the block information through p2p after workload certification; the storage sharing module broadcasts the block information after carrying out workload verification and data check on the received block information; the evaluation module evaluates the quality of the agricultural products according to the block information to obtain a quality score; the query module receives the block information and the quality scores to generate a query two-dimensional code.
The data acquisition module comprises: a data preprocessing unit and a data structuring unit, wherein: the data preprocessing unit preprocesses the soil information and the agricultural product type information and then generates structured data through the data structuring unit.
The pretreatment process comprises the following steps: eliminating abnormal data in the collection process, such as negative data, and numerical values which sharply decrease in the collection period; unifying the precision values of various collected data; and default values are processed, and data in the previous period or data estimated according to the historical data rule are defaulted.
The soil information comprises the content of nutrient elements and the content of heavy metal elements in the soil.
The storage sharing module carries out workload certification through a Hash256 algorithm.
The assessment module comprises: a calculation unit and a verification unit, wherein: after the verification unit verifies the identity label of the agricultural product, the calculation unit extracts block information corresponding to the agricultural product and calculates a quality score V(t)。
The mass fraction
The query module comprises: two-dimensional code generation unit and product information inquiry unit, wherein: the two-dimensional code generating unit receives the block information and the quality scores to generate two-dimensional codes corresponding to the agricultural products, and the product information inquiring unit provides the quality scores and the agricultural product type information of the agricultural products for the two-dimensional code scanner.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
As shown in fig. 1, the present embodiment includes: the device comprises a data acquisition module, a block information construction module, a storage sharing module, an evaluation module and a query module, wherein: the data acquisition module acquires soil information and agricultural product type information and transmits the soil information and the agricultural product type information to the block information construction module in a structured data form; the block information construction module distributes an identity label to the agricultural product, constructs the received structured data into a Merkle tree, performs digital signature and timestamp service to form block information, and transmits the block information through p2p after workload certification; the storage sharing module broadcasts the block information to other block information after carrying out workload verification and data check on the received block information; the evaluation module evaluates the quality of the agricultural products according to the block information to obtain a quality score; the query module receives the block information and the quality scores to generate a query two-dimensional code.
The data acquisition module comprises: a data preprocessing unit and a data structuring unit, wherein: the data preprocessing unit preprocesses the soil information and the agricultural product type information and then generates structured data through the data structuring unit. A soil component detector and a soil heavy metal detector are arranged in the soil, the soil component detector detects the content of nutrient elements in the soil, and the soil heavy metal detector detects the content of heavy metal elements in the soil. The content of nutrient elements and the content of heavy metal elements constitute soil information.
The block information construction module hashes an identity label of the agricultural product by adopting a public key according to the identity information of the farmer and the agricultural product batch, and the identity label is used as a unique identifier of the agricultural product of the batch. The structural data collected in a certain time period is constructed into a Merkle tree, so that only root node information can be reserved to save storage space, and block information can be constructed. Then a value is circularly guessed and the information is carried out the workload certification by using a Hash256 algorithm, if the calculated number of the first n bits of zero of the character string is consistent with the system setting, the workload certification is considered to be successful, and then the block information is propagated to other nodes p2 p.
After receiving the block information, the storage sharing module verifies the workload of the block information, that is, whether the number of first n-bit zeros of the obtained character string matches the number of bits of zero set by the system, and then checks data in the block information, for example, whether the data is repeated, and if the data passes the check, connects the block information to the corresponding block to form a block chain. If the block information of a certain block is to be modified, the workload certification work of all blocks needs to be recalculated, when the number of blocks connected behind a certain block reaches a certain value, the recalculation of all workload certifications of the block and the blocks behind the block is almost impossible, and therefore the data in the block cannot be tampered. Meanwhile, the block broadcasts the received block information to the neighbor nodes, so that the information of the whole block chain is updated, the information of all the nodes is kept basically consistent, and all the node data is maintained collectively, thereby embodying the disclosure and fairness of the system.
The assessment module comprises: a calculation unit and a verification unit, wherein: after the verification unit verifies the identity label of the agricultural product, the calculation unit extracts block information corresponding to the agricultural product and calculates a quality score V(t). The verification unit receives an identity label of a certain batch of agricultural products of the farmer to judge whether the identity exists legally. If the agricultural product quality score exists, the calculating unit extracts growth data information, product type information, soil information, region information and time information of all relevant agricultural products in the block chain according to the identity tag to judge the quality score of the product.
The mass fraction
Wherein: v(t)Representing the mass fraction, a, of different agricultural products calculated by a formulatlIs the weight of product quality in different time periods, h is the number of time intervals, t is the type of different agricultural products, wtiIs the weight p of nitrogen, phosphorus and potassium elements obtained by training different agricultural productsiIs the value of the soil after the content of nutrient elements is pretreated, j is the kind of heavy metal elements in the soil, MtjWeight of influence of heavy metals in the calculation, q, obtained by training for different agricultural productsjThe method refers to a result obtained by pretreating the content of heavy metal elements by a soil heavy metal detector.
The query module comprises: two-dimensional code generation unit and product information inquiry unit, wherein: the two-dimensional code generating unit receives the block information and the quality scores to generate two-dimensional codes corresponding to the agricultural products, and the product information inquiring unit provides the quality scores and the agricultural product type information of the agricultural products for the two-dimensional code scanner. After the identity label is input by the farmer, the two-dimensional code generating unit generates the two-dimensional code corresponding to the batch of agricultural products. The consumer serves as a scanner of the two-dimensional code, and the product information inquiry unit provides agricultural product type information, soil information and quality scores of agricultural products to the scanner.
Compared with the prior art, the invention utilizes the soil detector and the soil heavy metal detector to automatically collect the soil condition of the agricultural product in the growth process periodically. The block chain technology is introduced, so that the growth data of the agricultural products are difficult to modify manually. According to experience and historical data, training is carried out to obtain an agricultural product quality evaluation model, so that a unified decentralized agricultural product quality information system is constructed, and electronic commerce of agricultural products is facilitated.
The foregoing embodiments may be modified in many different ways by those skilled in the art without departing from the spirit and scope of the invention, which is defined by the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (1)
1. A blockchain-based agricultural product quality information system, comprising: the device comprises a data acquisition module, a block information construction module, a storage sharing module, an evaluation module and a query module, wherein: the data acquisition module acquires soil information and agricultural product type information and transmits the soil information and the agricultural product type information to the block information construction module in a structured data form; the block information construction module distributes an identity label to the agricultural product, constructs the received structured data into a Merkle tree, performs digital signature and timestamp service to form block information, and transmits the block information through p2p after workload certification; the storage sharing module broadcasts the block information after carrying out workload verification and data check on the received block information; the evaluation module evaluates the quality of the agricultural products according to the block information to obtain a quality score; the query module receives the block information and the quality scores to generate a query two-dimensional code;
the data acquisition module comprises: a data preprocessing unit and a data structuring unit, wherein: the data preprocessing unit preprocesses the soil information and the agricultural product type information and then generates structured data through the data structuring unit;
the soil information comprises the content of nutrient elements and the content of heavy metal elements of the soil;
the storage sharing module carries out workload certification through a Hash256 algorithm;
the assessment module comprises: a calculation unit and a verification unit, wherein: after the verification unit verifies the identity label of the agricultural product, the calculation unit extracts block information corresponding to the agricultural product and calculates a quality score V(t)；
The mass fraction
Wherein: v(t)Representing the mass fraction, a, of different agricultural products calculated by a formulatlIs the weight of product quality in different time periods, h is the number of time intervals, t is the type of different agricultural products, wtiIs the weight p of nitrogen, phosphorus and potassium elements obtained by training different agricultural productsiIs the value of the soil after the content of nutrient elements is pretreated, j is the kind of heavy metal elements in the soil, MtjWeight of influence of heavy metals in the calculation, q, obtained by training for different agricultural productsjThe method is a result obtained by pretreating the content of heavy metal elements by a soil heavy metal detector;
the query module comprises: two-dimensional code generation unit and product information inquiry unit, wherein: the two-dimensional code generating unit receives the block information and the quality scores to generate two-dimensional codes corresponding to the agricultural products, and the product information inquiring unit provides the quality scores and the agricultural product type information of the agricultural products for the two-dimensional code scanner.
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