Chemical conflict on-site early warning method and system based on electronic paper label

Abstract

The application discloses a chemical conflict on-site early warning method and system based on electronic paper labels, and belongs to the technical field of laboratory safety management and Internet of Things. The system comprises a regional monitoring gateway and an electronic paper label (which is internally integrated with a storage chip, an RFID communication module and an electronic paper display screen) installed on a reagent bottle; the regional monitoring gateway is used for identifying the IDs of multiple labels in the region and uploading to a background server; the background server is used for judging whether the ID combination has chemical property conflicts; when it is judged that there is a conflict, the background server issues an instruction to the corresponding electronic paper label, and forces the display screen to switch to a pre-stored warning picture. The application solves the technical problem that the traditional RFID system only alarms in the background pop-up window and cannot provide on-site visual feedback, and directly displays red warning information on the chemical bottle body, so that intuitive on-site visual warning is realized.

Description

Technical Field

[0001] This invention relates to the fields of laboratory safety management and Internet of Things (IoT) technology, specifically to a method and system for on-site early warning of chemical conflicts based on electronic paper tags, which is particularly suitable for real-time conflict detection and visual warning of hazardous chemicals in hazardous laboratory settings such as universities and research institutes. Background Technology

[0002] The safe management of hazardous chemicals is of paramount importance in laboratory safety. Traditional chemical management methods mainly rely on paper labels and manual ledgers, which suffer from problems such as illegible handwriting and untimely information updates. In recent years, Radio Frequency Identification (RFID) technology has been applied to the field of chemical management, enabling the identification and tracking of reagents through RFID readers.

[0003] However, existing technologies still have significant drawbacks in practical applications: 1. Early warning methods are outdated and not intuitive. Existing RFID chemical management systems typically use pop-up alarms in the background software. When lab technicians are performing experiments at the workbench, they often fail to notice the alarm messages on the background computer in a timely manner, resulting in the inability to promptly identify and handle the risk of hazardous chemical conflicts.

[0004] 2. Lack of on-site visual feedback Traditional RFID tags only have data storage and communication functions and cannot provide intuitive visual warnings on-site. Researchers need to return to their computers to check the system status, which could delay response times in emergencies.

[0005] 3. The system response is not direct enough. Existing systems mostly adopt an indirect "detection-alarm-manual handling" model, lacking the ability to directly provide risk warnings on the item itself, and thus failing to achieve a "what you see is what you get" risk control effect.

[0006] While e-paper display technology has been combined with RFID tags for applications such as electronic shelf labels in retail, there is currently no technology to apply it to on-site early warning scenarios for chemical conflicts. E-paper tags offer advantages such as low power consumption, rewritability, and sunlight visibility, making them particularly suitable for long-term use in laboratory environments.

[0007] In the prior art, US Patent 7,061,379 B2 discloses a system that uses RFID technology to prevent improper mixing of hazardous chemicals. This system involves attaching RFID tags to items, scanning the tag information, and determining whether there is an unsafe storage combination based on product configuration files. An alarm is triggered when a conflict is detected. Chinese Patent (CN106529875A), "RFID-based Chemical Warehouse Management Method and Server," also discloses a similar method for determining chemical conflicts. However, both of these prior art technologies rely on background software alarms, with warning information only appearing on the computer system interface. When lab technicians are performing experiments at the control panel, they often cannot notice the alarm information on the background computer in a timely manner, leading to the failure to promptly identify and handle the risk of hazardous chemical conflicts.

[0008] Therefore, there is an urgent need for a conflict warning system that can provide on-site visual warnings directly on chemical bottles to solve the technical problems of untimely warnings and unintuitive feedback in existing technologies. Summary of the Invention

[0009] (a) Purpose of the invention The purpose of this invention is to provide a method and system for early warning of chemical conflicts at the scene based on electronic paper tags. By utilizing the "low power consumption + visualization" characteristics of electronic paper tags, warning information is directly displayed on the object itself when a chemical conflict is detected, thus solving the technical problem that traditional RFID systems cannot provide on-site visual feedback.

[0010] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A chemical conflict early warning system based on electronic paper tags includes electronic paper tags installed on reagent bottles, a regional monitoring gateway, and a back-end server, characterized in that: The electronic paper tag includes a storage chip, an RFID communication module, and an electronic paper display screen. The storage chip stores chemical property information, and the electronic paper display screen is used to display chemical information under normal conditions and switch to a pre-stored warning screen in case of conflict. The regional monitoring gateway periodically scans and identifies electronic paper tags within its range, obtains a list of tag IDs, and uploads it to the backend server. The backend server is configured with a chemical conflict rule base, which is used to extract the corresponding chemical class code based on the tag ID and determine whether there is a combination of conflicting chemical properties in the area; When a conflict is detected, the backend server sends a refresh command to the electronic paper tag involved in the conflict. After receiving the command through the RFID communication module, the electronic paper tag forces the electronic paper display screen to switch to the pre-stored warning image to provide on-site visual warning on the reagent bottle body.

[0011] Furthermore, the warning screen includes a red background, an exclamation mark icon, and the text message "Do Not Mix" or "Conflict Exists".

[0012] Furthermore, the electronic paper tag is a passive tag, consuming power only when it receives a refresh command from the gateway.

[0013] A chemical conflict early warning method based on electronic paper tags includes the following steps: (1) Bind electronic paper labels containing electronic paper displays to chemicals and write chemical property information into the labels; (2) The regional monitoring gateway periodically scans the electronic paper tags within its identification range to obtain a list of tag IDs; (3) The backend server extracts the corresponding chemical category code based on the tag ID and determines whether there is a chemical property conflict; (4) When a conflict is detected, a refresh command is sent to the electronic paper tag involved in the conflict, so that its display screen switches to the warning screen.

[0014] (III) Beneficial Effects Compared with the prior art, the present invention has the following significant advantages: 1. Enable direct on-site warnings This invention provides intuitive on-site visual feedback by directly displaying red warning information on electronic paper labels on chemical bottles. Laboratory technicians can immediately identify potential chemical conflict risks without needing to consult the backend system during operation. This capability is unavailable in existing RFID chemical management systems, resolving the long-standing technical blind spot where technicians could not see backend alarms.

[0015] 2. Solving the blind spots of traditional RFID early warning systems Traditional RFID systems only issue alerts via pop-up windows in the background, which may not be visible to the operator at the control panel. This invention presents the warning information directly on the object itself, completely solving this technical problem.

[0016] 3. Low power consumption and long battery life Adopting a passive electronic paper tag design, it only consumes power when receiving refresh commands, and the tag's battery life can reach 3-5 years, making it suitable for long-term laboratory use.

[0017] 4. Significant technical results On-site visual feedback can significantly reduce the risk of misoperation due to failure to detect chemical conflicts in a timely manner, thereby improving the level of laboratory safety management. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the system architecture of the present invention; Figure 2 This is a schematic diagram of the electronic paper label structure of the present invention; Figure 3 This is a flowchart of the chemical conflict early warning method of the present invention. Detailed Implementation

[0019] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1: System Architecture Reference Figure 1 The chemical conflict early warning system of the present invention comprises three main components: 1. Electronic paper label (101) Installed on each chemical reagent bottle, it contains: (1) Storage chip: stores attribute information such as unique chemical identifier, chemical category code, name, and expiration date; (2) RFID communication module: UHF passive RFID communication module, used to communicate with the area monitoring gateway; (3) Electronic paper display: 4.2-inch black / white / red three-color electronic paper display, which can display text and simple graphics.

[0021] 2. Regional monitoring gateway (102) Deployed in a designated area of ​​the laboratory, including: (1) Fixed RFID UHF reader, effective identification distance 3-5 meters; (2) Communication module: Connects to the backend server via 4G / WiFi; (3) Edge computing module: can perform tag data preprocessing.

[0022] 3. Backend server (103) Deployed on the management platform, including: (1) Conflict identification module: Conflict judgment is performed based on the chemical conflict rule base; (2) Command issuing module: Sends refresh commands to electronic paper tags; (3) Database: Stores chemical property information and conflict rules.

[0023] Example 2: Electronic Paper Tag Structure Reference Figure 2 The specific structure of the electronic paper label (101) includes: (1) Label shell (201): Made of acid and alkali resistant material, protection level IP65; (2) Electronic paper display (202): 4.2-inch three-color display; (3) RFID antenna (203): Surround antenna design to ensure all-around reading; (4) Memory chip (204): Built-in non-volatile memory; (5) Connecting circuit (205): Connect each functional module.

[0024] The tag operates in a passive mode, without a built-in battery; the power required for operation is entirely provided by the radio frequency field of the area monitoring gateway.

[0025] Example 3: Chemical Conflict Early Warning Method Reference Figure 3 The specific implementation steps of the early warning method of the present invention are as follows: Step 301: Write Tag Information When chemicals are received into the warehouse, the following information is written into the electronic paper label using a handheld terminal: (1) Unique Identifier (UID); (2) Chemical name and CAS number; (3) Chemical category codes, including but not limited to: oxidant codes (e.g., 01), reducing agent codes (e.g., 02), strong acid codes (e.g., 03), strong alkali codes (e.g., 04), and flammable liquid codes (e.g., 05). (4) Expiry date and storage conditions.

[0026] The label screen displays the chemical name, main hazard icons, and expiration date simultaneously.

[0027] Step 302: Area Scan Monitoring The regional monitoring gateway scans all electronic paper tags within its coverage area at a preset interval (e.g., every 10 seconds), obtains a list of tag UIDs, and uploads it to the backend server.

[0028] Step 303: Conflict Determination The conflict identification module of the backend server performs the following operations: (1) Extract the chemical category code corresponding to the label UID; (2) Query the chemical conflict rule base (preset conflict matrix); (3) Determine whether there are chemical combinations that satisfy conflicting relationships within the same area.

[0029] Step 304: On-site warning When a conflict is detected (e.g., both oxidizing and reducing agents are detected simultaneously), the background server executes: (1) The backend server sends an alarm command to the area monitoring gateway; optionally, the area monitoring gateway triggers an audible alarm in response to the alarm command; (2) Send refresh instructions to the electronic paper tags involved in the conflict; (3) The electronic paper label display screen switches to a red background and displays an exclamation mark pattern and the text information "Do not mix" or "Conflict exists".

[0030] Step 305: Manual Confirmation Once the lab technician sees the red warning on the label, they can conduct an on-site verification: (1) If it is confirmed that the conflicting chemicals are improperly mixed, separate them immediately; (2) If the operation is confirmed to be compliant (such as a titration experiment), it can be registered and confirmed via a mobile terminal; (3) The system records all operations to form a complete traceability record.

[0031] Example 4: Specific Implementation of Conflict Rule Base and Warning Content This embodiment provides a detailed description of the conflict rule base of the backend server and the warning screen of the electronic paper tag.

[0032] The chemical category codes include, but are not limited to: oxidant codes (e.g., 01), reducing agent codes (e.g., 02), strong acid codes (e.g., 03), strong alkali codes (e.g., 04), and flammable liquid codes (e.g., 05). Those skilled in the art can expand these codes based on the actual list of hazardous chemicals under management.

[0033] The chemical conflict rule base is stored in the form of a chemical category-coded conflict matrix. In the conflict matrix, if category A and category B have a conflict relationship, then the matrix element M(A, B) = 1. For example: M(01, 02) = 1 indicates a conflict between oxidizer and reducing agent; M(03, 04) = 1 indicates a conflict between strong acid and strong base; M(01, 05) = 1 indicates a conflict between oxidizer and flammable liquid. In addition, the types of chemical property conflicts can also include conflicts between water-reactive flammable substances and water or humid environments.

[0034] When the backend server determines that a chemical conflict exists based on the conflict matrix, it issues a refresh command to switch the electronic paper display of the electronic paper label to a pre-stored warning screen. This warning screen uses red (one of the three colors: black, white, and red) as the background color and displays an exclamation mark icon along with the text "Do Not Mix" or "Conflict Exists" to provide a highly recognizable visual warning.

[0035] Technical effect verification This invention has achieved significant technical effects in practical applications: Under the configuration described in Example 3 (scanning cycle of 10 seconds), the maximum delay from when chemicals enter the monitoring area to when on-site warnings are displayed does not exceed 15 seconds, meeting the real-time early warning requirements of laboratory safety management. Compared to traditional methods relying on manual judgment, this solution uses a pre-set conflict rule base for automated matching, effectively eliminating the risk of misjudgment due to knowledge gaps or negligence, and ensuring the objective accuracy of conflict identification. In particular, by directly displaying warning information on the reagent bottle itself, it overcomes the spatial and attentional blind spots of existing background software alarm methods. Laboratory personnel can instantly perceive risks without interrupting operations to check a remote computer, significantly improving the intuitiveness and timeliness of on-site risk alerts. This system can effectively assist in preventing potential chemical mixing accidents.

Claims

1. A chemical conflict early warning system based on electronic paper tags, comprising electronic paper tags installed on reagent bottles, a regional monitoring gateway, and a back-end server, characterized in that: The electronic paper tag includes a storage chip, an RFID communication module, a control circuit, and an electronic paper display screen. The storage chip is used to store chemical property information, and the electronic paper display screen is used to display the chemical property information under normal conditions. The area monitoring gateway is used to periodically scan the electronic paper tags within the identification range, obtain a list of tag IDs, and upload them to the backend server. The backend server is configured with a conflict rule base based on chemical category codes, which is used to extract the corresponding chemical category codes according to each tag ID in the tag ID list, and to determine whether there are chemical property conflicts between different chemical category codes in the same area based on the conflict rule base. When a chemical conflict is detected, the backend server sends a refresh command to the electronic paper tag involved in the conflict. After the electronic paper tag receives the refresh command through the RFID communication module, the control circuit controls the electronic paper display screen to switch to a pre-stored warning image according to the refresh command, so as to provide on-site visual warning on the reagent bottle body.

2. The system according to claim 1, characterized in that: The warning screen includes a red background, an exclamation mark icon, and the text message "Do not mix" or "Conflict exists".

3. The system according to claim 1, characterized in that: The electronic paper tag is a passive tag that only consumes power when it receives a refresh command from the gateway.

4. A chemical conflict early warning method based on electronic paper tags, applied to the system described in any one of claims 1-3, characterized in that, Includes the following steps: S1: Attach electronic paper labels containing electronic paper displays to chemicals and write chemical property information to the labels; S2: The regional monitoring gateway periodically scans and identifies electronic paper tags within its range to obtain a list of tag IDs; S3: The backend server extracts the corresponding chemical category code based on the tag ID to determine if there is a chemical property conflict; S4: When a conflict is detected, a refresh command is sent to the electronic paper tag involved in the conflict, causing its display screen to switch to a pre-stored warning screen.

5. The method according to claim 4, characterized in that, The chemical category codes mentioned in step S3 include at least one of the following: oxidant codes, reducing agent codes, strong acid codes, strong base codes, and flammable liquid codes.

6. The method according to claim 4, characterized in that, The warning screen in step S4 displays a red background, an exclamation mark, and the text "Do not mix" or "Conflict exists".

7. The method according to claim 4, characterized in that, It also includes step S5: when the experimenter confirms that the operation is compliant, the system will stop alarming and record the registration information via mobile terminal.

8. The method according to claim 4, characterized in that, The chemical property conflict includes at least one of the following: conflict between oxidizing agent and reducing agent, conflict between strong acid and strong base, conflict between flammable substance and oxidizing agent, and conflict between water-sensitive flammable substance and water or humid environment.

9. The system according to claim 1, characterized in that: The electronic paper label has a black / white / red three-color display screen, which switches to a warning screen with a red background in case of a conflict.

10. The system according to claim 1, characterized in that: The chemical conflict rule base is stored in the form of a chemical class code conflict matrix. The matrix element M(A,B)=1 indicates that there is a conflict relationship between category A and category B.

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