A fresh food e-commerce cold chain distribution system

Abstract

This invention proposes a cold chain delivery system for fresh food e-commerce, relating to the field of fresh food delivery technology. It includes: a production system, comprising: sorting and standardizing fresh products, and loading the processed fresh products into modular packaging boxes, which are used to hold the fresh products; a distribution center system, comprising: loading multiple modular packaging boxes into a central distribution refrigerated box within a city central warehouse, the central distribution refrigerated box being equipped with multiple second sensors, a GPS module, and a locking system; a merchant delivery system, comprising: city refrigerated trucks for securing and delivering the central distribution refrigerated box; and a central server for receiving and processing data from all modular packaging boxes and the central distribution refrigerated box to monitor their status. This invention improves the safety, traceability, and efficiency of fresh food delivery, effectively reducing the risk of food spoilage and loss, thus providing higher quality fresh products.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh product distribution, and particularly to a cold chain distribution system for fresh food e-commerce. Background Art

[0002] With the rapid development of e-commerce and the continuous growth of consumers' demand for fresh products, the cold chain distribution system for fresh food e-commerce has received extensive attention in recent years.

[0003] With the progress of refrigeration technology, large refrigerated trucks and cold storage systems have gradually become the main methods of fresh food cold chain distribution. The cold chain system at this stage can maintain a stable low-temperature environment over a long distance, significantly extending the shelf life of fresh products and expanding the distribution range. However, this method still has problems such as high energy consumption and poor flexibility, especially in the last mile of urban distribution with low efficiency.

[0004] In recent years, with the development of Internet of Things, big data and artificial intelligence technologies, intelligent cold chain distribution systems have emerged. Through real-time monitoring and intelligent control, these systems can not only accurately control the temperature and humidity throughout the transportation process, but also optimize the distribution route and improve the distribution efficiency. At the same time, the application of modular design and new preservation materials has also greatly reduced packaging waste and improved the environmental friendliness of the system.

[0005] Serious losses in cold chain logistics: In the traditional fresh product distribution mode, the losses of fresh products during the circulation process are as high as 20 - 30%. After the vegetables are packaged at the base and directly sent to community supermarkets across the country, the losses are relatively small, but it is only suitable for densely populated areas and does not utilize the advantages of the Internet to transform fresh food logistics.

[0006] Packaging waste and environmental protection problems: Existing fresh food distribution generally uses disposable packaging materials such as foam boxes, aluminum foil paper and plastic bags, causing a large amount of waste and environmental pollution.

[0007] However, despite the significant progress of the existing technologies, there are still deficiencies in aspects such as full traceability, personalized distribution, and safety.

[0008] Therefore, there is an urgent need for a new cold chain distribution system for fresh food e-commerce to achieve controllable, efficient, environmentally friendly and safe cold chain distribution throughout the process. Summary of the Invention

[0009] In view of this, this invention proposes a cold chain delivery system for fresh food e-commerce. By integrating smart hardware, IoT technology, and big data analytics, it constructs a comprehensive, efficient, and traceable cold chain logistics solution. The system aims to achieve end-to-end monitoring and intelligent management from fresh product packaging and transportation to final delivery, ensuring food safety and quality. Through modular design and a multi-layered sensor network, the system can monitor key parameters such as temperature, collision, and odor in real time, and utilize a multi-level early warning mechanism to promptly detect and handle abnormal situations. Simultaneously, a smart locking system and GPS positioning enhance the safety and traceability of the delivery process.

[0010] The technical solution of this invention is implemented as follows: This invention provides a fresh food e-commerce cold chain delivery system, comprising:

[0011] The production system includes: sorting and standardizing fresh products, packing the processed fresh products into modular packaging boxes, wherein the modular packaging boxes are used to hold fresh products, and the modular packaging boxes are equipped with multiple first sensors for monitoring data inside the boxes during delivery; and packing fresh products into the modular packaging boxes at the place of origin.

[0012] The distribution center system includes: placing multiple modular packaging boxes inside a central distribution refrigerated box in a city central warehouse; the central distribution refrigerated box is equipped with multiple second sensors, a GPS module and a locking system; the second sensors are used to monitor data inside the box during delivery; the GPS module is used to provide location information; and the locking system is used to control the opening and closing of the central distribution refrigerated box.

[0013] Merchant delivery system includes: urban cold chain vehicles for fixing and delivering central distribution refrigerated boxes, which are equipped with charging interfaces for powering the central distribution refrigerated boxes;

[0014] The central server, equipped with a monitoring platform, receives and processes data from all modular packaging boxes and central distribution refrigerated containers to monitor their status.

[0015] Based on the above technical solution, preferably, the first sensor includes a temperature sensor, a collision sensor and an odor sensor, and the second sensor includes a temperature sensor, a collision sensor and a lock pick sensor. Both the first sensor and the second sensor are connected to a memory and a battery.

[0016] Based on the above technical solution, preferably, the modular packaging box is equipped with a short-range wireless communication module for communicating with the central distribution refrigerated box; the central distribution refrigerated box is equipped with a multi-mode wireless communication module for receiving data from the first sensor of the modular packaging box, integrating the data from the first sensor and the data from the second sensor, and transmitting it to the central server.

[0017] Based on the above technical solution, preferably, the central distribution refrigerated box transmits data to the central server according to a hybrid transmission strategy, which is as follows:

[0018] A. Under normal circumstances, data is transmitted once at the set time interval;

[0019] B. When the sensor detects abnormal data, data transmission is triggered immediately;

[0020] B. When the central distribution refrigerated box enters an area with good network coverage, data synchronization is triggered, and data that has not been transmitted in the memory is transferred.

[0021] Based on the above technical solution, preferably, the urban refrigerated truck is equipped with a card slot device; the card slot device is evenly distributed along the length of the truck body, and the spacing matches the size of the central distribution refrigerated box; wherein, the card slot device includes:

[0022] The base is fixed to the bottom of the carriage;

[0023] The claw, a movable locking mechanism, is connected to the base via a hinge and is used to secure the central distribution refrigerated container.

[0024] Connecting rods are used to connect all the jaws to achieve synchronized operation;

[0025] The operating lever, located outside the carriage and connected to the connecting rod, is used to control the switching of the grippers.

[0026] Based on the above technical solution, preferably, the central distribution refrigerated box is provided with locking protrusions, which are installed at the four bottom corners of the central distribution refrigerated box and correspond to the claws. They are inverted L-shaped, and the horizontal part is used for locking the claws.

[0027] Based on the above technical solutions, the preferred locking system includes:

[0028] An integrated control module, including a microprocessor and memory, is used to handle unlock requests, manage permissions, and control the lock status;

[0029] Electronic lock execution unit, including miniature electromagnetic lock or motor-driven lock, is used to perform unlocking and locking operations;

[0030] The communication unit includes a 4G / 5G mobile communication module, which is used for data transmission and command reception with the central server.

[0031] The QR code scanning module, including a small camera and a decoding processor, is used to scan and recognize the unique QR code of the order displayed by the customer;

[0032] The power management unit includes a high-energy-density lithium battery, charging control circuitry, and a low-power management system for system power supply and energy optimization.

[0033] The locking system adopts a modular design and is installed on the door frame or side wall of the refrigerator.

[0034] Based on the above technical solution, the preferred execution process of the locking system is as follows:

[0035] a) The QR code scanning module remains in standby mode and is activated when a QR code is detected within its field of view;

[0036] b) The QR code scanning module reads the unique QR code of the order displayed by the merchant and transmits the information to the integrated control module;

[0037] c) The integrated control module verifies the validity of the QR code, confirms the merchant's identity and permissions, and if the verification is successful, controls the electronic lock execution unit to perform the unlocking operation;

[0038] d) The power management unit implements dynamic power consumption control, adjusts system power consumption in different working modes, and automatically charges when docked with urban cold chain trucks;

[0039] e) The integrated control module stores all unlocking records and abnormal events locally and periodically uploads the data to the central server via the communication unit.

[0040] Based on the above technical solution, preferably, the central distribution refrigerated box is provided with multiple partitions to divide the central distribution refrigerated box into multiple areas. Horizontal slide rails are installed on the left and right side walls of each area, and the slide rails extend along the depth direction of the central distribution refrigerated box. Modular packaging boxes are equipped with sliders that match the slide rails on both sides. The sliders are protruding parts and their shapes match the slide rails. The modular packaging boxes are embedded into the central distribution refrigerated box through the matching of sliders and slide rails.

[0041] Based on the above technical solution, preferably, the monitoring platform has a built-in data processing algorithm and is equipped with a multi-level early warning system. It determines the early warning level based on the data processing results and generates early warning information. The early warning levels are divided into:

[0042] Emergency alert: Abnormal lock-picking data detected in the central distribution refrigerated container; temperature data of modular packaging boxes or central distribution refrigerated containers exceeds 120% of the safety threshold; odor data shows that fresh products have obviously deteriorated; multiple moderate alerts occur simultaneously.

[0043] Severe warning: The temperature of the modular packaging box or central distribution refrigerated box exceeds 110% but not 120% of the safety threshold; odor data shows that the fresh products have reached the critical point of spoilage; collision data of the modular packaging box or central distribution refrigerated box shows a strong collision; multiple mild warnings occur at the same time.

[0044] Moderate warning: The temperature of the modular packaging box or central distribution refrigerated box exceeds the safety threshold but does not reach 110%; the odor data is approaching the critical point; the collision data shows a moderate collision; and the temperature data analysis predicts that it will exceed the safety threshold within 2 hours.

[0045] Mild warning: The temperature of the modular packaging box or central distribution refrigerated box is close to but has not exceeded the safety threshold; odor data shows slight changes; collision data shows a minor collision; temperature data analysis predicts that it will approach the safety threshold within 4 hours.

[0046] Green alert: Any data shows minor anomalies, but within safe limits.

[0047] The system of the present invention has the following advantages over the prior art:

[0048] By integrating modular packaging boxes, central distribution refrigerated boxes, urban cold chain vehicles, and central servers, and combining them with multi-level sensor networks, GPS positioning, intelligent locking systems, and multi-level early warning mechanisms, the entire process from packaging to delivery has been intelligently monitored and managed, significantly improving the safety, traceability, and efficiency of fresh food delivery, effectively reducing the risk of food spoilage and loss, and providing higher quality fresh products.

[0049] The modular packaging box design, equipped with multiple sensors, enables precise monitoring of individual fresh products. It can detect changes in temperature, impact, and odor in a timely manner, effectively preventing cross-contamination and improving the accuracy and flexibility of product quality management.

[0050] By establishing a multi-level wireless communication network between modular packaging boxes, central distribution refrigerated boxes, and central servers, efficient data transmission and integration are achieved, improving the system's real-time monitoring capabilities and data integrity.

[0051] A hybrid transmission strategy combining normal timed transmission, abnormal trigger transmission, and synchronous transmission in areas with good network conditions is adopted to optimize transmission efficiency and network resource utilization while ensuring data real-time performance.

[0052] The intelligent locking system, which integrates a control module, an electronic lock execution unit, and a QR code scanning module, enables safe and convenient unlocking operations, improving the security and traceability of the delivery process.

[0053] By setting up horizontal slide rails and matching modular packaging box sliders inside the refrigerated box, the rapid loading and unloading and stable positioning of the packaging boxes are achieved, improving packing efficiency and space utilization, while reducing the risk of collision during transportation.

[0054] By setting up a five-level early warning mechanism (emergency, severe, moderate, mild, and green) and combining it with data processing algorithms, the system can accurately identify and classify abnormal situations, improve its risk management capabilities and response efficiency, and maximize the protection of the quality and safety of fresh produce. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 This is a system framework diagram of the present invention;

[0057] Figure 2 This is a simplified structural diagram of the central distribution refrigerated box of the present invention;

[0058] Figure 3 This is a schematic diagram of the nested structure of the modular packaging box and the central distribution refrigerated box of the present invention;

[0059] Figure 4 This is a flowchart illustrating the system operation of the present invention. Detailed Implementation

[0060] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0061] like Figure 1 As shown, the present invention provides a fresh food e-commerce cold chain delivery system, comprising:

[0062] The production system includes: sorting and standardizing fresh products, and loading the processed fresh products into modular packaging boxes. The modular packaging boxes are used to hold fresh products and are equipped with multiple first sensors to monitor the data inside the boxes during delivery.

[0063] The distribution center system includes: placing multiple modular packaging boxes inside a central distribution refrigerated box in a city central warehouse; the central distribution refrigerated box is equipped with multiple second sensors, a GPS module and a locking system; the second sensors are used to monitor data inside the box during delivery; the GPS module is used to provide location information; and the locking system is used to control the opening and closing of the central distribution refrigerated box.

[0064] Merchant delivery system includes: urban cold chain vehicles for fixing and delivering central distribution refrigerated boxes, which are equipped with charging interfaces for powering the central distribution refrigerated boxes;

[0065] The central server, equipped with a monitoring platform, receives and processes data from all modular packaging boxes and central distribution refrigerated containers to monitor their status.

[0066] It should be noted that the delivery system provided by this invention is designed for B-end merchants. It consists of a production system, a distribution center system, a merchant delivery system, and a central server working together to deliver fresh produce from the production base to the merchants, ensuring the safety, traceability, and efficiency of fresh produce delivery during the process.

[0067] Specifically, in one embodiment of the present invention, the modular packaging boxes are used to package fresh produce from the production base, which refers to the upstream agricultural product supply base. This base serves as the initial processing site for fresh produce and is equipped with automated sorting equipment to sort and standardize the produce according to merchant orders. The processed fresh produce is then packed into the modular packaging boxes, which feature stainless steel bodies and food-grade plastic lids. The lids have small-hole sealing devices to effectively release oxygen and extend shelf life. Each modular packaging box is equipped with multiple primary sensors and a short-range wireless communication module. The primary sensors include a temperature sensor, a collision sensor, and an odor sensor, used to monitor temperature, collision conditions, and odor changes within the modular packaging box. The short-range wireless communication module communicates with the central distribution refrigerated container. The production base feeds back production status and processing progress to the central server, ensuring transparency and traceability throughout the supply chain.

[0068] Modular packaging boxes are transported from the production base to the central warehouse by backbone refrigerated trucks. According to the merchant's order, the central warehouse arranges and combines the various modular packaging boxes and packs them into central distribution refrigerated boxes.

[0069] Specifically, Figure 2 This is a simplified structural diagram of a centrally distributed refrigerated container. In this example, the container includes a body 21, double doors 22, handles 23, and a locking system 24. Other components of the container, such as a second sensor and a multi-mode communication module, are installed inside the body and are not shown in this diagram. Figure 3This is a schematic diagram of the nested structure of modular packaging boxes and central distribution refrigerated boxes. Figure 3 In the illustration, the central distribution refrigerated box 31 is equipped with multiple partitions 32, which divide the central distribution refrigerated box into multiple areas. Horizontal slide rails 33 are installed on the left and right side walls of each area, and the slide rails extend along the depth direction of the central distribution refrigerated box. Modular packaging boxes 34 are equipped with sliders 35 that match the slide rails on both sides. The sliders are protruding parts and their shapes match the slide rails. The modular packaging boxes are embedded into the central distribution refrigerated box through the matching of sliders and slide rails.

[0070] In one example, the internal sliding rail setup of the central distribution refrigerated container is as follows: Horizontal sliding rails are installed on the inner sidewalls of the central distribution refrigerated container, with a pair of rails for each layer, located on the left and right sides respectively. The rails should extend along the depth of the refrigerated container so that the modular packaging boxes can slide in from front to back. The rails can be made of L-shaped or C-shaped metal strips to ensure sufficient strength and smoothness. The rails should be fixed to the inner wall of the large container, and can be installed using screws or rivets. Modular packaging box slider setup: Slider blocks that match the rails are installed on both sides of the modular packaging box. The sliders can be simple protrusions, shaped to fit the rails. For example, if the rails are L-shaped, the slider is a flat protrusion. The sliders extend along the length of the modular packaging box to ensure stability. The sliders can be directly molded onto the modular packaging box or fixed to the sidewalls of the modular packaging box by bolts or other means.

[0071] In another example, the slide rails and sliders are made of wear-resistant, low-friction materials, such as stainless steel or high-strength plastic. A stop device is installed at the end of the slide rail to prevent the small box from sliding out.

[0072] Urban refrigerated trucks are responsible for transporting refrigerated containers from the central warehouse to various self-pickup points. These trucks are equipped with clamps to secure the containers for quick loading and unloading, and charging ports to ensure the containers maintain their refrigeration capacity during transport. Urban refrigerated trucks ensure that fresh produce remains in optimal condition during the last mile of transportation.

[0073] Specifically, the urban refrigerated truck is equipped with a card slot device; the card slot device is evenly distributed along the length of the truck body, and the spacing matches the size of the central distribution refrigerated box; wherein, the card slot device includes:

[0074] The base is fixed to the bottom of the carriage;

[0075] The claw, a movable locking mechanism, is connected to the base via a hinge and is used to secure the central distribution refrigerated container.

[0076] Connecting rods are used to connect all the jaws to achieve synchronized operation;

[0077] The operating lever, located outside the carriage and connected to the connecting rod, is used to control the switching of the grippers.

[0078] The central distribution refrigerated box is equipped with locking protrusions, which are installed at the four corners of the bottom of the central distribution refrigerated box and correspond to the claws. They are inverted L-shaped, and the horizontal part is used for locking the claws.

[0079] Locking mechanism: When pushed in, the inclined design of the locking protrusion guides the claw to lift up; after being fully pushed in, the claw falls into the locking position under the action of gravity; the horizontal part of the locking protrusion bears the downward pressure of the claw, thus achieving fixation.

[0080] In another embodiment, the urban refrigerated truck can also be equipped with sliding rails. These rails are installed at the bottom of the truck body, are adjustable in width, and are installed in pairs. A slotting device is located on the side of the sliding rail. Correspondingly, the central distribution refrigerated box is equipped with a sliding block structure, which is bolted to both sides of the bottom of the central distribution refrigerated box, corresponding to the sliding rail. Through the sliding rails and sliding block device, combined with the slotting device, rapid loading and unloading of the refrigerated box can be achieved.

[0081] The refrigerated container uses heat-insulating materials and is equipped with multiple secondary sensors, a GPS module, a locking system, and a multi-mode wireless communication module. The secondary sensors include temperature sensors, collision sensors, and pry sensors, used to monitor the container's temperature, collision conditions, and any abnormalities in the locking system. The multi-mode wireless communication module receives data from the primary sensors on the modular packaging boxes, integrates the data from the primary and secondary sensors, and transmits it to a central server. Both the primary and secondary sensors are connected to a memory and a battery. The memory records various sensor data locally, maintaining a complete record of all monitoring data for later analysis or verification in case of disputes. When the network signal is poor or interrupted, data is temporarily stored and uploaded in batches once the signal is restored. The battery powers the sensors and memory.

[0082] Specifically, during delivery, the central distribution refrigerated box transmits data to the central server according to a hybrid transmission strategy, which is as follows:

[0083] A. Under normal circumstances, data is transmitted once at the set time interval;

[0084] B. When the sensor detects abnormal data, data transmission is triggered immediately;

[0085] B. When the central distribution refrigerated box enters an area with good network coverage, data synchronization is triggered, and data that has not been transmitted in the memory is transferred.

[0086] For example, under normal circumstances, data is transmitted every 30 minutes during transportation and every 5 minutes during delivery. When the sensor detects a sudden temperature change or a violent collision, data transmission is immediately triggered. When the refrigerated box enters the transit station and the network coverage is good, data synchronization is automatically performed, and critical data that has not been transmitted in local storage is transmitted in batches.

[0087] After the data is transmitted to the central server, the server sends a confirmation message. If no confirmation is received, the transmission will be retried after a certain period of time.

[0088] In one example, considering the volume and structural limitations of the central distribution refrigerated box and modular packaging boxes, the hardware setup can be configured as follows:

[0089] The modular packaging boxes are equipped with short-range wireless communication modules, such as Bluetooth Low Energy (BLE) modules, while the central distribution refrigerated box is equipped with a cellular network module (4G / 5G) and a Bluetooth module (for communication with the smaller boxes). Storage can be provided by an SSD to store data from all the modular packaging boxes and refrigerated boxes.

[0090] Specifically, if conditions permit, an RTC module can also be configured on the refrigerated box to ensure accurate and timely data timestamps.

[0091] During the transport of refrigerated containers by urban cold chain trucks, data is uploaded to a central server according to a hybrid transmission strategy. The central server is equipped with a monitoring platform with built-in data processing algorithms and a multi-level early warning system. The system determines the early warning level based on the data processing results and generates early warning information.

[0092] The process of determining the warning level and generating warning information based on data processing results is as follows:

[0093] 1. Clean, standardize, and detect outliers in the received raw data; this includes removing duplicate data, correcting obvious errors, and filling in missing values. Transform different data types, such as temperature and humidity, to a uniform scale. Use the statistical method Z-score to identify and handle outliers.

[0094] 2. Perform spatiotemporal alignment and fusion of data from multiple sensors from modular packaging boxes and central distribution refrigerated boxes; including: synchronizing data from different sensors by timestamp, associating data from sensors at different locations with specific modular packaging boxes or refrigerated boxes, and using Kalman filtering algorithms to synthesize multi-source data.

[0095] 3. Long Short-Term Memory (LSTM) network is used to analyze the fused time series data, train the model to identify normal operation mode and various abnormal modes, and perform anomaly detection on the real-time data stream through the trained model to identify abnormal modes of parameters such as temperature and collision.

[0096] 4. By combining GPS location information and external weather data, establish a correlation model between environmental factors and cold chain status, and use random forest to predict the impact of environmental changes on the cold chain.

[0097] 5. Establish an initial threshold based on historical data, set a safety boundary by combining expert knowledge, and dynamically adjust the threshold using an exponentially weighted moving average.

[0098] 6. Based on the processed data and dynamic thresholds, the system status is assessed in real time. A decision tree is used to implement multi-level early warning logic, generating early warning information that includes the warning level, specific anomalies, and recommended measures. Warning levels are divided into:

[0099] Emergency alert: Abnormal lock-picking data detected in the central distribution refrigerated container; temperature data of modular packaging boxes or central distribution refrigerated containers exceeds 120% of the safety threshold; odor data shows that fresh products have obviously deteriorated; multiple moderate alerts occur simultaneously.

[0100] Severe warning: The temperature of the modular packaging box or central distribution refrigerated box exceeds 110% but not 120% of the safety threshold; odor data shows that the fresh products have reached the critical point of spoilage; collision data of the modular packaging box or central distribution refrigerated box shows a strong collision; multiple mild warnings occur at the same time.

[0101] Moderate warning: The temperature of the modular packaging box or central distribution refrigerated box exceeds the safety threshold but does not reach 110%; the odor data is approaching the critical point; the collision data shows a moderate collision; and the temperature data analysis predicts that it will exceed the safety threshold within 2 hours.

[0102] Mild warning: The temperature of the modular packaging box or central distribution refrigerated box is close to but has not exceeded the safety threshold; odor data shows slight changes; collision data shows a minor collision; temperature data analysis predicts that it will approach the safety threshold within 4 hours.

[0103] Green alert: Any data shows minor anomalies, but within safe limits.

[0104] Specifically, in one embodiment of the present invention, after the urban cold chain vehicle delivers the central distribution refrigerated box to the designated location, it needs to use a locking system to verify merchant information and unlock the box. The locking system includes:

[0105] An integrated control module, including a microprocessor and memory, is used to handle unlock requests, manage permissions, and control the lock status;

[0106] Electronic lock execution unit, including miniature electromagnetic lock or motor-driven lock, is used to perform unlocking and locking operations;

[0107] The communication unit includes a 4G / 5G mobile communication module, which is used for data transmission and command reception with the central server.

[0108] The QR code scanning module, including a small camera and a decoding processor, is used to scan and recognize the unique QR code of the order displayed by the customer;

[0109] The power management unit includes a high-energy-density lithium battery, charging control circuitry, and a low-power management system for system power supply and energy optimization.

[0110] The locking system adopts a modular design and is installed on the door frame or side wall of the refrigerator.

[0111] Specifically, the execution process of the locking system is as follows:

[0112] a) The QR code scanning module remains in standby mode and is activated when a QR code is detected within its field of view;

[0113] b) The QR code scanning module reads the unique QR code of the order displayed by the merchant and transmits the information to the integrated control module;

[0114] c) The integrated control module verifies the validity of the QR code, confirms the merchant's identity and permissions, and if the verification is successful, controls the electronic lock execution unit to perform the unlocking operation;

[0115] d) The power management unit implements dynamic power consumption control, adjusts system power consumption in different working modes, and automatically charges when docked with urban cold chain trucks;

[0116] e) The integrated control module stores all unlocking records and abnormal events locally and periodically uploads the data to the central server via the communication unit.

[0117] In a specific example, the hardware configuration of the locking system is as follows:

[0118] The integrated control module includes: a microprocessor, such as the ARM Cortex-M4 series, and memory, including Flash memory and RAM.

[0119] Electronic lock execution unit: miniature electromagnetic lock or motor-driven lock, lock status detection sensor.

[0120] Communication unit: 4G / 5G mobile communication module, antenna.

[0121] QR code scanning module: small CMOS camera, image processing and decoding chip.

[0122] Power Management Unit: High-energy-density lithium battery, charging control IC, power management IC.

[0123] Housing and mounting components: waterproof and dustproof housing, mounting brackets and screws.

[0124] Specifically, the integrated control module is responsible for processing input information, controlling various subsystems, and making decisions. The electronic lock execution unit performs physical unlocking and locking according to the instructions of the integrated control module. The communication unit ensures that the system maintains a connection with the central server, enabling real-time data upload and instruction reception. The QR code scanning module is responsible for recognizing merchants' order QR codes. It includes a high-resolution small camera and a dedicated image processing chip, which can quickly and accurately recognize and decode QR codes. The power management unit ensures that the system operates stably for extended periods. A high-energy-density lithium battery provides the main power, the charging control circuit automatically charges when docked with a refrigerated truck, and the low-power management system optimizes energy use.

[0125] Please see Figure 4 The operation process of the fresh food e-commerce cold chain distribution system of the present invention will be illustrated by a specific embodiment:

[0126] After receiving a merchant's order, the S1 system selects a suitable modular packaging box based on the order details. Fresh produce is then placed into the packaging box, and the sensors on the box are activated. The system generates a unique QR code for each order, which is then linked to a specific modular packaging box.

[0127] S2 loads multiple modular packaging boxes into a central distribution refrigerated container, securing them in place using a sliding rail system. The central distribution refrigerated container's locking system is activated, recording the packing information. Based on the order information and delivery address, the system plans the optimal delivery route.

[0128] The S3 central distribution refrigerated containers are loaded onto city refrigerated trucks and secured with clamps. The refrigerated trucks provide power to the central distribution refrigerated containers, ensuring the refrigeration system and monitoring equipment operate continuously. The vehicles then begin delivery according to the planned route.

[0129] Sensors in the S4 modular packaging boxes and central distribution refrigerated containers continuously collect data. The central distribution refrigerated containers transmit data to the central server via a multi-mode wireless communication module, following a hybrid transmission strategy. The central server's monitoring platform processes the received data in real time, performing analysis and issuing alerts.

[0130] If the S5 system detects any anomaly (such as excessively high temperature, violent collision, etc.), it will trigger an alert of the appropriate level based on the severity. The system will automatically generate handling suggestions and notify relevant personnel to take necessary intervention measures.

[0131] After the S6 refrigerated truck arrives at the delivery location, the delivery person releases the locking device using a lever and retrieves the corresponding central distribution refrigerated box. The merchant presents the order QR code, which is verified using the locking system's scanning module. Once verification is successful, the system unlocks the central distribution refrigerated box, and the delivery person retrieves the corresponding modular packaging box and delivers it to the merchant.

[0132] After the S7 deliveries are completed, the empty modular packaging boxes and central distribution refrigerated containers are recycled. The equipment is then cleaned and disinfected before being put back into use.

[0133] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fresh food e-commerce cold chain distribution system, characterized in that, The application relates to a cold chain logistics system, which comprises the following parts: a production system, which comprises fresh product sorting and standardization processing, and loading of the processed fresh products into modularized sub-packing boxes, wherein the modularized sub-packing boxes are used for containing fresh products, and a plurality of first sensors are arranged on the modularized sub-packing boxes and used for monitoring data in the boxes during distribution; the production system generates a unique two-dimensional code for each order after the fresh products are loaded into the modularized sub-packing boxes, and the two-dimensional code is bound to the specific modularized sub-packing box; a distribution center system, which comprises loading of a plurality of modularized sub-packing boxes into a central distribution refrigerated box in a city center warehouse, wherein the central distribution refrigerated box is provided with a plurality of second sensors, a GPS module and a locking system, the second sensors are used for monitoring data in the box during distribution, the GPS module is used for providing position information, and the locking system is used for controlling opening and closing of the central distribution refrigerated box; a merchant distribution system, which comprises a city cold chain vehicle used for fixing and distributing the central distribution refrigerated box; a central server provided with a monitoring platform and used for receiving and processing data from all the modularized sub-packing boxes and the central distribution refrigerated box so as to monitor states of the modularized sub-packing boxes and the central distribution refrigerated box; the first sensors comprise temperature sensors, collision sensors and smell sensors, the second sensors comprise temperature sensors, collision sensors and lock-picking sensors, and the first sensors and the second sensors are connected with memories and batteries; the modularized sub-packing boxes are provided with short-distance wireless communication modules and are used for communicating with the central distribution refrigerated box; the central distribution refrigerated box is provided with a multi-mode wireless communication module and is used for receiving data of the first sensors of the modularized sub-packing boxes, integrating the data of the first sensors with data of the second sensors and then transmitting the integrated data to the central server; during transportation of the city cold chain vehicle, data is uploaded to the central server according to a hybrid transmission strategy, the central server is provided with a monitoring platform, the monitoring platform is internally provided with a data processing algorithm and is provided with a multi-level early warning system, a warning level is judged according to a data processing result, and warning information is formed; wherein the process of judging the warning level according to the data processing result and forming the warning information is as follows: (1) the received original data is cleaned, standardized and subjected to abnormal value detection; including removing repeated data, correcting obvious error values, filling in missing values; converting different types of data to a unified scale; using a statistical method Z-score to identify and process abnormal values; (2) the data from the modularized sub-packing boxes and the central distribution refrigerated box are subjected to time-space alignment and fusion; including: synchronizing data from different sensors according to time stamps, associating data of different position sensors to specific modularized sub-packing boxes or refrigerated boxes, and using a Kalman filtering algorithm to integrate multi-source data; (3) long short-term memory network is adopted to analyze the fused time series data, a model is trained to identify normal operation modes and various abnormal modes, real-time data flow is input into the trained model for abnormal detection, and abnormal modes of various parameters are identified; (4) a correlation model of environmental factors and cold chain states is established by combining GPS position information and external weather data, and a random forest is used to predict the influence of environmental changes on the cold chain. (5) Establish an initial threshold value based on historical data, set a safety boundary combined with expert knowledge, and dynamically adjust the threshold value using an exponentially weighted moving average; (6) Based on the processed data and dynamic threshold value, real-time evaluation of system status, using decision tree to realize multi-level early warning logic, generate early warning information including warning level, specific abnormal situation and suggested measures.

2. The fresh food e-commerce cold chain distribution system of claim 1, wherein, The central distribution refrigerated box transmits data to the central server according to the mixed transmission strategy as follows: A. Under normal circumstances, transmit data once at a set time interval; B. When the sensor detects abnormal data, trigger data transmission immediately; B. When the central distribution refrigerated box enters an area with good network coverage, trigger data synchronization and transmit the non-transmitted data in the memory.

3. The fresh food e-commerce cold chain distribution system of claim 1, wherein, The city cold chain vehicle is provided with a clamping groove device; The clamping groove device is evenly distributed along the length direction of the carriage, and the interval is matched with the size of the central distribution refrigerated box; wherein the clamping groove device comprises: a base fixed at the bottom of the carriage; a clamping jaw, a movable locking mechanism connected to the base through a hinge, used to fix the central distribution refrigerated box; a connecting rod for connecting all clamping jaws to realize synchronous operation; an operating rod located outside the carriage and connected to the connecting rod, used to control the opening and closing of the clamping jaw.

4. The fresh food e-commerce cold chain distribution system of claim 3, wherein, The central distribution refrigerated box is provided with a locking protrusion installed at the bottom of the central distribution refrigerated box at four corners corresponding to the clamping jaw, which is inverted L-shaped, and the horizontal part is used for clamping jaw locking.

5. The fresh food e-commerce cold chain distribution system of claim 1, wherein, The locking system comprises: an integrated control module containing a microprocessor and a memory for processing unlocking requests, managing permissions and controlling the locking state; an electronic lock execution unit including a miniature electromagnetic lock or a motor-driven lock for executing unlocking and locking operations; a communication unit including a 4G / 5G mobile communication module for data transmission and instruction reception with the central server; a two-dimensional code scanning module including a small camera and a decoding processor for scanning and identifying the unique two-dimensional code of the customer's order displayed; a power management unit including a high-energy-density lithium battery, a charging control circuit and a low-power consumption management system for system power supply and energy optimization; wherein the locking system adopts modular design and is installed in the door frame or side wall of the refrigerated box.

6. The fresh food e-commerce cold chain distribution system of claim 5, wherein, The execution process of the locking system is as follows: a) The two-dimensional code scanning module is in standby state all the time, and is activated when it detects that there is a two-dimensional code in its field of view; b) The two-dimensional code scanning module reads the unique two-dimensional code of the order displayed by the merchant, and transmits the information to the integrated control module; c) The integrated control module verifies the validity of the two-dimensional code, confirms the identity and permission of the merchant, and controls the electronic lock execution unit to execute the unlocking operation if the verification is passed; d) The power management unit implements dynamic power consumption control, adjusts the system power consumption in different working modes, and automatically charges when connected with the city cold chain vehicle; e) The integrated control module stores all unlocking records and abnormal events locally, and uploads the data to the central server regularly through the communication unit.

7. The fresh food e-commerce cold chain distribution system of claim 1, wherein, The central distribution refrigeration box is provided with a plurality of partition plates, which divides the central distribution refrigeration box into a plurality of areas. The side walls on the left and right sides of each area are provided with horizontal sliding rails extending along the depth direction of the central distribution refrigeration box. The modular sub-packaging box is provided with sliding blocks matched with the sliding rails on both sides. The sliding blocks are protruding parts and are matched with the sliding rails in shape. The modular sub-packaging box is embedded in the central distribution refrigeration box through the matching of the sliding blocks and the sliding rails.

8. The fresh food e-commerce cold chain distribution system of claim 1, wherein, The monitoring platform is provided with a data processing algorithm and a multi-level early warning system. The early warning level is determined according to the data processing result, and early warning information is formed. The early warning levels are divided into: Emergency warning: abnormal data detection of the central distribution refrigeration box lock, temperature data of the modular sub-packaging box or the central distribution refrigeration box exceeding 120% of the safety threshold, odor data showing that the fresh products have been obviously deteriorated, and multiple moderate warnings appearing at the same time; Serious warning: temperature of the modular sub-packaging box or the central distribution refrigeration box exceeding 110% but not reaching 120% of the safety threshold, odor data showing that the fresh products reach the critical point of deterioration, collision data of the modular sub-packaging box or the central distribution refrigeration box showing strong collision, and multiple mild warnings appearing at the same time; Moderate warning: temperature of the modular sub-packaging box or the central distribution refrigeration box exceeding the safety threshold but not reaching 110%, odor data approaching the critical point, collision data showing moderate collision, and temperature data analysis predicting that the safety threshold will be exceeded within 2 hours; Mild warning: temperature of the modular sub-packaging box or the central distribution refrigeration box close to but not exceeding the safety threshold, odor data showing slight change, collision data showing slight collision, and temperature data analysis predicting that the safety threshold will be close within 4 hours; Green prompt: any data appears slightly abnormal, but within the safety range.

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