CN102012146A - Internet of things-based refrigerator food safety guarantee method and system - Google Patents

Abstract

The invention discloses a refrigerator food safety assurance method and system based on the Internet of Things. Fix the radio frequency identification tag and the food to be stored together, use the tag reading module to read the information of the radio frequency identification tag, and use the information input module to specify the type of food corresponding to the tag, and store according to the recommendations given by the refrigerator food safety guarantee device The number of days, decide to adopt the suggestion or customize the input number of days; when the food is in the storage link, the refrigerator food safety protection device will automatically detect the food storage database to determine whether there is expired food; when the central processing module detects that there is expired food, it will label the corresponding food Information, food storage time and expired information are handed over to the display reminder module to feed back to the user. The invention is easy to use, convenient and intuitive, the label can be recycled, and real-time query is provided, which is convenient for users to know the current storage status of each food; it is easy to combine with the digital control system of the existing refrigerator, and is used to ensure the safety of refrigerator food.

Description

Refrigerator food safety assurance method and system based on Internet of Things

technical field

The invention relates to the Internet of Things technology, in particular to a method and system for ensuring food safety of refrigerators based on the Internet of Things.

Background technique

The definition of The Internet of things is to connect any item with the Internet according to the agreed protocol through radio frequency identification RFID, infrared sensors, global positioning systems, laser scanners and other information sensing devices for information exchange and communication , to achieve intelligent identification, positioning, tracking, monitoring and management of a network.

Radio Frequency Identification RFID is a non-contact automatic identification technology. It automatically identifies the target object and obtains relevant data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments. Radio frequency identification RFID technology can identify high-speed moving objects and can identify multiple tags at the same time, and the operation is fast and convenient.

Refrigerators are a product of modern society and have brought a lot of convenience to our daily lives. Now, almost every family has one or more refrigerators. With the improvement of the quality of life, people are more and more concerned about food safety issues. However, the acceleration of the pace of life makes it difficult for people to have the energy to remember how long the food in the refrigerator has been stored and whether it is no longer edible, and the situation of getting sick from eating spoiled food in the refrigerator happens from time to time.

The general practice now is to use the time dial on the safe box to mark the date when the food is put in to ensure food safety. However, this method cannot control each food separately, it is inconvenient to operate, the prompt is not obvious, and it is easy to be ignored.

Contents of the invention

The object of the present invention is to provide a refrigerator food safety assurance method and system based on the Internet of Things, and utilize the Internet of Things technology to ensure the safety of refrigerator food.

The technical solution adopted by the present invention to solve its technical problems is as follows:

One, a kind of refrigerator food safety assurance method based on Internet of Things, the steps of this method are as follows:

1) Fix the RFID tag with the food to be stored;

2) Use the tag reading module to read the radio frequency identification tag information;

3) Use the information input module to specify the type of food corresponding to the label. If there is no corresponding type, it will be the default type. According to the recommended storage days given by the refrigerator food safety protection device, decide to adopt the suggestion or customize the input days;

4) When the food is in storage, the refrigerator food safety protection device will automatically detect the food storage database to determine whether any food is expired until some food expires;

5) The central processing module detects that there is expired food, and sends the corresponding food label information, food storage time information and expiration information to the display reminder module for feedback to the user, and informs the user of all the above information through the wireless communication module.

The method of informing the user of all the above information includes sending short messages, emails or desktop reminders to the user.

2. A refrigerator food safety guarantee system based on the Internet of Things, including a set of radio frequency identification tags and refrigerator food safety guarantee devices, wherein:

1) The set of radio frequency identification tags is a radio frequency identification tag that can work normally in a low temperature and humid environment of -26°C;

2) The refrigerator food safety guarantee device includes a wireless communication module, an information storage module, a label reading module, an information input module, a display reminder module and a central processing module; the central processing module is connected with the wireless communication module, the information storage module, the label respectively The reading module, the information input module and the display reminder module are connected, and a group of radio frequency identification tags are respectively wirelessly connected with the tag reading module.

The beneficial effects that the present invention has are:

The invention utilizes the Internet of Things technology to mark each food separately, and can perform quality control on each food separately; the radio frequency identification label adopted is resistant to low temperature and humidity, can adapt to the internal environment of the refrigerator, is easy to read, and the label can be recycled, and the price is low. Inexpensive; provide real-time query, convenient for users to know the current storage status of each food; list expired food, remind users not to eat, convenient and intuitive; easy to combine with the digital control system of the existing refrigerator.

Description of drawings

Fig. 1 is a structural block diagram of the present invention.

Fig. 2 is a structural block diagram of the refrigerator food safety guarantee device of the present invention.

Fig. 3 is a working flowchart of the refrigerator food safety assurance system of the present invention.

Specific implementation method

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Fig. 1 and Fig. 2, the present invention includes a set of radio frequency identification tags and refrigerator food safety guarantee devices, wherein:

1) The set of radio frequency identification tags is a radio frequency identification tag that can work normally in a low temperature and humid environment at -26°C, and general radio frequency identification tags can meet this requirement; the number of radio frequency identification tags can be arbitrary according to different requirements Configuration, generally about 20 is appropriate.

2) The refrigerator food safety guarantee device includes a wireless communication module, an information storage module, a label reading module, an information input module, a display reminder module and a central processing module; the central processing module is connected with the wireless communication module, the information storage module, the label respectively The reading module, the information input module and the display reminder module are connected, and a group of radio frequency identification tags are respectively wirelessly connected with the tag reading module.

The wireless communication module is used for communicating with the personal computer, updating the food database, and sending food safety information to the user. The wireless network used can adopt mobile networks such as GSM/3G/GPRS, and can also adopt a wireless network card to connect with a home computer, and access the Internet through the home computer. Through one of the above two methods, the wireless communication module can update the food database information, and notify the user of food expiration information in the form of text messages, emails, desktop reminders, etc. according to a predetermined method. Huawei's GTM900B wireless communication module is used here to realize GPRS/GSM transmission.

The information storage module is used for storing radio frequency identification label information, food storage information and food database. In view of the small required storage capacity, it is sufficient to use a 16M FLASH storage.

The tag reading module is used for reading radio frequency identification tag information. This type of card reader is very common, and the EP3100 read-write module of EP Company can be used.

The information input module is used to specify the food category corresponding to the label, which is convenient for selecting the food category and viewing the corresponding information. A touch panel with a number key, a direction key, a cancel key, and a confirmation key is adopted, and such a touch panel can be purchased from the market.

The display reminder module is used to feed back the processing results of the central processing module to the user, list all expired foods, and display the expiration time and related information of non-expired foods. According to cost requirements, different types of display screens such as TFT/LCD/LED can be used. In addition, a buzzer can also be added to remind the user when the food expires.

The central processing module is used to process the read-in radio frequency identification tag information, and store the information in the information storage module; call the food database in the information storage module, display it on the display screen, and provide users with suggested storage time; Select and current time, store the food storage information in the information storage module; control the wireless information module, update the food database, and store the update result in the information storage module; regularly detect the information storage module, according to the food storage information and food database information , automatically judge the current food safety status, and make corresponding prompts. To realize such a function, you can use general embedded chips, such as ARM922T, ARM10TDM1, etc., customize the software that meets the above functions, and write it into the chip.

The refrigerator food safety guarantee device can be embedded in the refrigerator as a part of the refrigerator, or it can be used alone.

As shown in Figure 3, it is a working flow diagram of the refrigerator food safety guarantee system of the present invention, and its steps are as follows:

1. Use a radio frequency identification tag and fix it with the food to be stored. Different fixing methods can be adopted here according to the type of food. If it is fresh vegetables and fruits, the label can be fixed with rubber bands, strings, etc.; if it is boxed or plated food, it can be stuck on it with an adhesive label.

2. Use the device tag reading module to read the radio frequency identification tag information. RFID technology is non-contact, so turn on the tag reading mode and read the tag by holding it close to the device.

3. Use the device information input module to specify the type of food that the label corresponds to. According to the button pressed by the user, the device will give information on the type of food that meets the requirements on the display reminder module. If there is no corresponding type, it will be the default type. According to the recommended storage days given by the device, confirm to accept the suggestion, or cancel the suggestion to use the custom input days.

4. The food is in the storage stage, and the device is in this state most of the time. The central processing module will regularly call the wireless communication module, and use one of the above two communication methods to obtain the updated information of the food database and store it in the information storage module. The central processing module automatically detects the food storage database at regular intervals to determine whether there is any expired food. If there is any expired food, it will enter the next step to remind the user, otherwise it will remain at this stage consistently.

5. When it is detected that there is expired food, the central processing module sends the corresponding food label information, food storage time and expiration information to the display reminder module to feed back to the user, and informs the user of the information through the wireless communication module. Food expiration information is displayed on the display screen, and the buzzer beeps once at intervals, and sends short messages, emails, and desktop reminders to users through wireless communication.

Under normal conditions, users can query information such as the putting time and expiration time of each food through the refrigerator food safety assurance system, either through the display screen of the device or through wireless communication.

Claims (3)

1. A refrigerator food safety guarantee method based on the Internet of Things is characterized in that the steps of the method are as follows: 1) Fix the RFID tag with the food to be stored; 2) Use the tag reading module to read the radio frequency identification tag information; 3) Use the information input module to specify the type of food corresponding to the label. If there is no corresponding type, it will be the default type. According to the recommended storage days given by the refrigerator food safety protection device, decide to adopt the suggestion or customize the input days; 4) When the food is in storage, the refrigerator food safety protection device will automatically detect the food storage database to determine whether any food is expired until some food expires; 5) The central processing module detects that there is expired food, and sends the corresponding food label information, food storage time information and expiration information to the display reminder module for feedback to the user, and informs the user of all the above information through the wireless communication module. 2. A refrigerator food safety guarantee method based on the Internet of Things according to the method of claim 1, characterized in that: the method of informing the user of all the above information includes sending short messages, emails or desktop reminders to the user. 3. A refrigerator food safety guarantee system based on the Internet of Things according to the method of claim 1, characterized in that it comprises a set of radio frequency identification tags and refrigerator food safety guarantee devices, wherein: 1) The set of radio frequency identification tags is a radio frequency identification tag that can work normally in a low temperature and humid environment of -26°C; 2) The refrigerator food safety guarantee device: including a wireless communication module, an information storage module, a label reading module, an information input module, a display reminder module and a central processing module; the central processing module is connected with the wireless communication module, the information storage module, the label The reading module, the information input module and the display reminder module are connected, and a group of radio frequency identification tags are respectively wirelessly connected with the tag reading module.

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