CN220064813U - RFID material information acquisition device based on internet of things - Google Patents

Abstract

The utility model discloses an RFID material information acquisition device based on the technology of the Internet of things, which comprises: the main control chip is connected with the OLED display module, the matrix keyboard, the upper computer, the power supply battery, the RFID reader-writer module, the wireless WiFi communication module and the SD card module; the RFID reader-writer module is used for reading and writing the electronic tag content on the materials to acquire the material information; the wireless WiFi communication module, the wireless router and the Internet of things cloud platform are sequentially connected; the system can realize standardization, standardization and flow of material information acquisition work, thereby effectively managing materials, simultaneously enabling the material management work to be simple and convenient, realizing networking and sharing, and further saving human resources.

Description

RFID material information acquisition device based on internet of things

Technical Field

The utility model relates to an RFID (radio frequency identification) material information acquisition device based on the technology of the Internet of things, and belongs to the field of material information acquisition.

Background

At present, a manual accounting mode is adopted to record material information, but the material information such as names, models, warehouse entry registration, warehouse delivery and delivery of articles is various, so that the material management work is very complex and complicated; the manual accounting mode has low recording efficiency and also has the problems of error recording, missing recording and the like.

Disclosure of Invention

In view of the above, the utility model provides an RFID material information acquisition device based on the internet of things technology, which can realize standardization, standardization and flow of material information acquisition work, thereby effectively managing materials, simultaneously enabling the material management work to be simple and convenient, realizing networking and sharing, and further saving human resources.

The utility model aims to provide an RFID material information acquisition device based on the technology of the Internet of things, which comprises: the main control chip is connected with the OLED display module, the matrix keyboard, the upper computer, the power supply battery, the RFID reader-writer module, the wireless WiFi communication module and the SD card module;

the RFID reader-writer module is used for reading and writing the electronic tag content on the materials to acquire the material information;

the wireless WiFi communication module, the wireless router and the Internet of things cloud platform are sequentially connected.

Preferably, the size of the OLED screen in the OLED display module ranges from 2 to 5 inches.

Preferably, the RFID reader-writer module is connected with an SPI1 port of the main control chip in an SPI mode; the SD card module is connected with an SPI2 port of the main control chip in an SPI mode.

Preferably, the wireless WiFi communication module is an ESP8266 communication module.

Preferably, the main control chip is an STM32F103C8T6 chip.

Preferably, the main control chip is connected with the power supply battery through a power supply voltage stabilizing circuit.

Compared with the prior art, the utility model has the following beneficial effects:

the RFID material information acquisition device provided by the embodiment of the utility model can realize standardization, standardization and flow of material information acquisition work, so that materials are effectively managed, meanwhile, the material management work becomes simple and convenient, networking and sharing are realized, and human resources can be further saved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a block diagram of an RFID asset information collection device according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of an RFID asset information collection device according to an embodiment of the present utility model.

Fig. 3 is a schematic circuit diagram of a part of an RFID material information collecting device according to an embodiment of the present utility model.

Fig. 4 is a schematic circuit diagram of a main control module according to an embodiment of the utility model.

Fig. 5 is a schematic circuit diagram of an OLED according to an embodiment of the present utility model.

Fig. 6 is a schematic diagram of a charging circuit of a power supply battery according to an embodiment of the present utility model.

Fig. 7 is a schematic circuit diagram of serial port and USB conversion according to an embodiment of the present utility model.

Fig. 8 is a schematic circuit diagram of a matrix keyboard according to an embodiment of the present utility model.

Fig. 9 is a schematic circuit diagram of a power supply voltage regulator according to an embodiment of the present utility model.

Fig. 10 is a schematic circuit diagram of wireless WIFI communication according to an embodiment of the utility model.

In fig. 1: the system comprises a 1-OLED display module, a 2-matrix keyboard, a 3-upper computer, a 4-power supply battery, a 5-main control chip, a 6-RFID reader-writer module, a 7-wireless WiFi communication module, an 8-SD card module, a 9-electronic tag, a 10-wireless router and an 11-Internet of things cloud platform;

in fig. 2: (1) -an RFID reader module, (2) -an OLED display module, (3) -a matrix keyboard, (4) -a box body, (5) -a battery compartment;

in fig. 4: u1 is an STM32F103C8T6 chip, a decoupling and filtering circuit is arranged in a dotted line frame 1, a reset circuit is arranged in a dotted line frame 2, a starting mode circuit is arranged in a dotted line frame 3, and H3 is a downloading burning socket;

in fig. 10: u4 is ESP8266 chip and H2 is ESP-01S module socket.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the utility model, which is defined by the claims, but rather by the claims, unless otherwise indicated, and that any structural modifications, proportional changes, or dimensional adjustments, which would otherwise be apparent to those skilled in the art, would be made without departing from the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.

Some of the terms or terminology that appear in describing embodiments of the utility model are applicable to the following explanation:

1. RFID (Radio Frequency Identification) is a radio frequency identification technology, realizes non-contact two-way data communication in a wireless radio frequency mode, and has the characteristics of strong anti-interference capability, high safety, high identification speed and the like;

2. the SD memory card (Secure Digital Memory Card) is a new generation of high-speed memory device based on semiconductor flash memory. The technology of SD memory cards has evolved from MMC Card (multimediacard) format, and SDIO (SD Input/Output) cards have evolved based on compatible SD memory cards, where the compatibility includes mechanical, electronic, power, signal and software, and SD and SDIO cards are commonly known as SD memory cards. The SD card has a high memory capacity, a fast data transmission rate, great mobility flexibility, and excellent security, and is widely used in portable devices such as digital cameras, tablet computers, and multimedia players. The SD card has the structure capable of ensuring the safety of digital file transmission and is easy to reformat, so that the SD card has wide application fields. Multimedia files such as music, movies and the like can be conveniently stored in the SD card. The brands of SD cards currently on the market are many such as: SANDISK, kingmax, panasonic and Kingston. The SD card is used as a novel storage device and has the following characteristics: high storage capacity, most commonly used capacity: 8GB, 16GB, 32GB, 128GB, 256GB, etc. The built-in encryption technology is suitable for copyright protection function of copybooks based on SDMI protocol. High-speed data transfer; the maximum read-write rate is 100MB/s. The device has the advantages of light and small volume, portability and strong impact resistance.

3. The MF RC522 is a high-integration read-write card chip applied to 13.56MHz non-contact communication, is a low-voltage, low-cost and small-size non-contact read-write card chip which is proposed by NXP company for three-meter application, and is a good choice for research and development of intelligent instruments and portable handheld devices. MF RC522 fully integrates all types of passive contactless communication means and protocols at 13.56MHz, using advanced modulation and demodulation concepts. Support 14443A compatible transponder signals. The digital part handles ISO14443A frames and error detection. In addition, a rapid CRYPTO1 encryption algorithm is supported, the term authentication MIFARE family of products. MFRC522 supports higher speed contactless communication in the MIFARE family with bi-directional data transfer rates up to 424kbit/s. As a new member of 13.56MHz high integration read-write card family chip family, MF RC522 has many similarities to MF RC500 and MF RC530, and has many features and differences. Serial communication with fewer wires is adopted between the serial communication device and the host, and SPI, IIC or serial UART modes can be selected according to different user requirements, so that the reduction of wires, the reduction of the size of a PCB and the reduction of cost are facilitated.

4. ESP8266 is a WiFi chip of the Internet of things, based on the ESP8266, a WiFi module of a serial port of the Internet of things can be developed, physical equipment of a user can be connected to a WiFi wireless network to carry out Internet or local area network communication, networking functions are achieved, and the network function requirements can be met only by using AT instruction control through an output serial port. ESP8266 is a high-performance wireless SOC, integrates an ultra-low power consumption 32-bit micro MCU, has a 16-bit reduction mode, supports 80MHz and 160MHz in main frequency, supports RTOS, and integrates Wi-FiMAC/BB/RF/PA/LNA and an on-board antenna. Common functions include: IO control, timers, interrupts, PWM, freeRTOS, serial communication (UART, IIC, SPI), etc.

As shown in fig. 1, this embodiment provides an RFID material information collecting device based on the internet of things technology, the device includes: the main control chip 5 is connected with the OLED display module 1, the matrix keyboard 2, the upper computer 3, the power supply battery 4, the RFID reader-writer module 6, the wireless WiFi communication module 7 and the SD card module 8; the RFID reader-writer module 6 is used for reading and writing the content of the electronic tag 9 on the material to acquire material information; the wireless WiFi communication module 7, the wireless router 10 and the Internet of things cloud platform 11 are sequentially connected.

As shown in fig. 2, the apparatus further includes: the main control chip of fig. 1 is built in box body (4), box body (4) upper surface is provided with OLED display module (2), and box body (4) left side is provided with RFID read write line module (1), and box body (4) right side is provided with battery compartment (5), and battery compartment (5) upper surface is provided with matrix keyboard (3).

Specifically, the RFID reader-writer module, the OLED display module, the matrix keyboard, the box body and the battery compartment use the same shell, the shell is made of plastic materials, the shell is divided into an upper layer and a lower layer, the lower layer is divided into a left part and a right part, the left part covers the RFID reader-writer module, and the right part covers the rest parts. The shell accommodates the PCB main board, the RFID reader module and the battery; and a main control chip, an OLED display module, a matrix keyboard, a wireless WiFi communication module, a connecting circuit and a power supply circuit are arranged on the PCB main board. The size of the shell is designed to be in line with the handheld size, the surface of the shell is provided with holes, the OLED, the keyboard, the charging interface, the serial communication interface and the SD card interface are exposed, the OLED is arranged in the holes with the same size as the OLED on the surface of the upper layer, and the keyboard is similar. The left part and the right part are connected in a threaded fixing mode, and the battery is fixed in the battery compartment in a glue fixing mode. The technical features related to this paragraph are all of the prior art.

The battery compartment is provided with a plurality of external threads on one side of the battery compartment, and the battery compartment is rotationally connected with the connecting screw on one side of the box body through the external threads.

Referring to FIG. 3, the device uses an STM32F103C8T6 chip based on an Arm-Cortex-M3 kernel as a main control chip; the main control chip utilizes each port of the main control chip to respectively control other modules, so that all the modules are integrated, and the functional requirements are met; referring to fig. 4, in practical application, the main control chip, the filter capacitor, the reset circuit, the debug circuit and the boot startup procedure circuit form a main control module, i.e. a minimum system.

Referring to fig. 3 and 5, the oled display module is driven using the I2C protocol, and has a total of 5 pins, VCC, GND, SCL, SDA, RES respectively; the pins have corresponding functions although the number is small, and the pins are indispensable.

Specifically, VCC: the power supply pin of the module has a power supply range of +3V to +5V; GND: a power ground for the module; SCL: the clock line of the I2C protocol, the control module operates and is in an idle state, and the effects of controlling the screen to display various different data and clear the screen are achieved by controlling the high and low levels of SCL; SDA (serial digital access card): when the SCL clock line starts to vibrate, the data pin of the I2C protocol can transmit data to the module, and the dot matrix is turned on and off by sending high and low levels, so that the effect of controlling the screen to display specific patterns is achieved; RES: the reset pin of the module needs to be reset once when being electrified, thereby playing a role of synchronization.

In addition, the OLED display module uses a 2.42-inch OLED screen, backlight is not needed during display, the visual angle is wide and clear, good interaction can be brought to users, the screen is ultrathin, and most importantly, the power consumption is low, so that the display module is not in line with the concept of a portable device.

Referring to fig. 3, the device performs non-contact reading and writing on electronic tag content conforming to ISO14443A protocol through a high-frequency read-write chip MF RC522 in the RFID reader module, wherein MF RC522 is connected with an SPI1 port of an STM32F103ZET6 chip through an SPI method.

The internal storage structure of the electronic tag is consistent with the Mifare One card, and the electronic tag is divided into an administrator card and an article tag card; in addition to the unchangeable 4-byte UID, the internal storage information of the electronic tag also stores personal information such as the name and number of the administrator, and the article tag also stores contents related to the articles such as the self-organizing number and the in-out state of the articles.

Referring to fig. 3, the device reads and writes through the SD card module, wherein the SD card module is connected with the SPI2 port of the STM32F103ZET6 chip in an SPI manner, and is consistent with the pin function of the MF RC522, and the difference is only that the used hardware SPI pins are different.

Referring to fig. 6, when an external USB cable is connected to the USB1 receptacle of the power supply battery, the power supply battery may be charged.

In this embodiment, the device may also use serial communication to communicate information with the host computer; because the main control chip is provided with a plurality of communication ports, no additional communication module is needed when serial communication is used. When the upper computer is ase:Sub>A personal computer PC, ase:Sub>A USB connecting line is adopted for communication, one end of the connecting line is ase:Sub>A USB-A interface, the other end of the connecting line is ase:Sub>A USB type C interface, and correspondingly, ase:Sub>A USB type C socket is arranged on the device; the main control chip converts the serial port data into USB data through the CH340 chip and sends the USB data to the personal computer PC. Referring to fig. 7, when an external USB cable is connected to a USB2 socket (USB type C socket), the device communicates with an upper computer through a USB-to-serial port.

Referring to fig. 8, the essence of a matrix keyboard is to arrange multiple keys together, and generally design by a single pin or a row-column scanning method of matrix keys; because a large number of I/O pins are remained in the main control chip, a single key is directly connected with the single pin, so that the key control function is realized, and the method is very simple and convenient.

In this embodiment, there are 13 keys, which are respectively: 10 number keys, enter key, out key and In key from 0 to 9; wherein: the number key: the method is used for inputting numbers such as passwords or numbers; the Enter key: the confirmation key confirms the current operation after the key is pressed, and the current operation is withdrawn and returned to the previous operation interface; out key: the ex-warehouse key is used for ex-warehouse of the articles marked by the electronic tag after the key is pressed; in key: and the warehousing key is used for warehousing the articles marked by the electronic tag after the key is pressed.

It should be noted that, when designing a circuit, situations such as current and voltage mismatch, peak current and peak voltage generation are often encountered, which not only affects the normal operation of the circuit, but may even cause the breakdown and burnout of the circuit. Therefore, the current and voltage of the circuit are required to be stabilized by the power supply voltage stabilizing circuit, so that the circuit is in a normal and stable working state. As shown in fig. 9, in the power supply voltage stabilizing circuit of the present embodiment, the input voltage is limited to be not more than 6V, and after the power supply voltage is input from the power supply interface, the user freely controls the on-off of the power supply through a self-locking switch; after conduction, the corresponding current flows through a fuse, and under the condition that the circuit is normal, the fuse has only small partial pressure, and when the circuit fails abnormally, the resistance value of the fuse is increased, and the partial pressure is increased, so that the circuit is protected; the voltage protected by the fuse is then supplied to an AMS1117-3.3V voltage stabilizing chip (called as a voltage stabilizing chip for short), before the voltage stabilizing chip is supplied with power, the power supply voltage passes through an electrolytic capacitor of 100UF and a safety capacitor of 100NF (the power supply voltage is filtered into a gentle straight line from an undulating curve by utilizing the principle of charging and discharging the capacitor); the 5V actually applied to the voltage stabilizing chip is converted into 3.3V in the voltage stabilizing chip and flows out; filtering and outputting the flowing voltage by utilizing the principle of charging and discharging the capacitor; in the power supply voltage stabilizing circuit, an LED lamp is also arranged, and after the 3.3V is successfully output, the LED lamp is conducted, so that the power supply is in a normal working state.

The device adopts the ESP8266 communication module to carry out WiFi communication, and the ESP8266 communication module can link the device to upload article information (also called as 'material information') such as the time of entering and leaving a warehouse, the maintenance time, the state and the like of articles into the Arin cloud platform in a WiFi transmission mode; the user can synchronously acquire the article information only by logging in the Ali cloud platform; referring to fig. 10, the device and ESP8266 communication module are transmitted transparently through the serial port; the design scheme has the significance that the U4 and the H2 can be selected alternatively, an ESP8266 chip module can be directly pasted, and an ESP-01S wireless WiFi module can be purchased selectively and connected with the H2.

The embodiment also provides a material information acquisition method based on the RFID material information acquisition device, which comprises the following steps:

s11, starting the RFID material information acquisition device.

S12, continuously detecting whether an electronic tag exists, if so, returning data, otherwise, not operating, wherein: the return data is stored in the SD card module and/or uploaded to an upper computer and/or uploaded to an Array cloud platform, and the return data comprises the self-programming number, type, state and the like of the article.

The embodiment also provides a material information query method realized based on the RFID material information acquisition device, which comprises the following steps:

s21, starting the RFID material information acquisition device.

S22, inputting the self-programming number of the article.

In this step, manual key input is performed.

S23, inquiring the state of the article according to the self-programming number.

And S231, if the device does not store the self-organized number, displaying prompt information in a screen to remind a user that the electronic tag of the article is not scanned.

S232, if the device stores the self-organized number, displaying the state of the article, such as ex-warehouse or in-warehouse, on a screen.

In summary, in this embodiment, the collection device uses an STM32F103C8T6 chip based on the Arm-Cortex-M3 kernel as the main control chip; the main control chip utilizes each port of the main control chip to respectively control other modules, so that all the modules are integrated, and the functional requirements are met; the acquisition device carries out non-contact reading and writing on the electronic tag through the high-frequency reading and writing chip, and has the characteristics of strong anti-interference capability, high safety, high recognition speed and the like; the acquisition device takes a 2.42 inch OLED display module as a display module, so that better interaction is brought to a user; the acquisition device takes the matrix keys as signal input, so that the controllability is improved; the acquisition device takes the SD card module as a data storage space, the output data can be directly read out, the data and the upper computer display and manage the state information of the article, and the storage speed advantage is utilized to reduce the error rate of the data; after the RFID reader-writer module reads the electronic tag, writing data into the SD card module, inquiring the state of the electronic tag through keys, such as ex-warehouse or in-warehouse, displaying state information through a screen, finally transferring the data into an upper computer for management, and storing the data read by the upper computer into a database for storage; the acquisition device comprises a wireless WIFI communication module, and can remotely log in an Internet of things platform such as an Arian cloud through a local wireless router, and the Internet of things cloud platform can manage and store material information.

The RFID material information acquisition device provided by the embodiment of the utility model can realize standardization, standardization and flow of material information acquisition work, so that materials are effectively managed, meanwhile, the material management work becomes simple and convenient, networking and sharing are realized, and human resources can be further saved.

The above-mentioned embodiments are only preferred embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto, and any person skilled in the art can make equivalent substitutions or modifications according to the technical solution and the inventive concept of the present utility model within the scope of the present utility model disclosed in the present utility model patent, and all those skilled in the art belong to the protection scope of the present utility model.

Claims (6)

1. RFID material information acquisition device based on internet of things, its characterized in that includes:

the main control chip is connected with the OLED display module, the matrix keyboard, the upper computer, the power supply battery, the RFID reader-writer module, the wireless WiFi communication module and the SD card module;

the RFID reader-writer module is used for reading and writing the electronic tag content on the materials to acquire the material information;

the wireless WiFi communication module, the wireless router and the Internet of things cloud platform are sequentially connected.

2. The device of claim 1, wherein the OLED screen in the OLED display module has a size ranging from 2 to 5 inches.

3. The device of claim 1, wherein the RFID reader module is connected to an SPI1 port of the master control chip by means of an SPI; the SD card module is connected with an SPI2 port of the main control chip in an SPI mode.

4. The apparatus of claim 1, wherein the wireless WiFi communication module is an ESP8266 communication module.

5. The apparatus of claim 1, wherein the master chip is an STM32F103C8T6 chip.

6. The device of claim 1, wherein the main control chip is connected to the power supply battery through a power supply voltage stabilizing circuit.