CN104616629A - Power carrier-based electronic price tag - Google Patents

Abstract

The invention relates to an electronic price tag based on a power carrier, comprising a control device and an electronic price tag terminal; the control device and the electronic price tag terminal are connected through a power line; the control device includes a PC; the electronic price tag terminal It includes a carrier module, a display, a microprocessor and a memory; the microprocessor is connected to the carrier module, the display and the memory respectively; the PC exchanges commodity information with the microprocessor through the carrier module; the microprocessor stores Commodity information, and control the display to display commodity information; the invention enables the power line to supply power to the electronic price tag terminal and at the same time makes the power line a communication carrier between the electronic price tag terminal and the PC in the control device, thereby reducing maintenance costs.

Description

An electronic price tag based on power carrier

technical field

The invention relates to the field of electronic price tags, in particular to an electronic price tag based on a power carrier with simple communication.

Background technique

Existing supermarkets, convenience stores, pharmacies, etc. have paper labels and electronic price tags to display product information. The information displayed on paper labels cannot be changed flexibly. In case of discounts, price reductions, product changes, and promotions, the information on the paper labels must be replaced. Production and maintenance The cost is high; most electronic price tags transmit product information wirelessly or wiredly, and display the product information on the electronic price tag terminal. There may be hundreds or thousands of products or more in an ordinary supermarket, and each product Use an electronic price tag terminal to display product information. If wired communication is used, the wiring will be complicated, and the cost of use and maintenance will be high; if wireless communication is used, hundreds of wireless transmitters will cause the entire supermarket to be covered by wireless radiation. Communication has poor real-time performance and occupies a lot of wireless frequency resources. For this reason, we have developed a power line based on power carrier communication that allows the power line to become a communication carrier between the electronic price tag terminal and the PC in the control device while supplying power to the electronic price tag terminal. Electronic price tags, thereby reducing maintenance costs.

Contents of the invention

The purpose of the present invention is to provide an electronic price tag based on a power carrier with simple communication in order to overcome the deficiencies of the prior art.

In order to achieve the above purpose, the technical solution adopted in the present invention is: an electronic price tag based on a power carrier, including a control device and an electronic price tag terminal; the control device and the electronic price tag terminal are connected through a power line; the control device It includes a PC; the electronic price tag terminal includes a carrier module, a display, a microprocessor and a memory; the microprocessor is connected to the carrier module, the display and the memory; the PC exchanges commodities with the microprocessor through the carrier module information; the microprocessor stores commodity information through the memory, and controls the display to display the commodity information.

Preferably, the microprocessor refers to currently commonly used 8-bit, 16-bit or 32-bit microprocessors; the microprocessor is respectively provided with a full-duplex or half-duplex asynchronous serial communication with the carrier module The communication port, the I2C or SPI interface consistent with the memory, and the interface that can control the display of the display.

Preferably, the carrier module can be directly connected to the mains, and the carrier module demodulates the asynchronous serial communication on the microprocessor into carrier communication and sends it to the power line, and can also demodulate the carrier communication on the power line into asynchronous Serial communication is sent to the microprocessor.

Preferably, the control device further includes a power carrier communication conversion module and a cash register; the power carrier communication conversion module converts the carrier communication into a communication interface that can be connected to a PC, so as to realize two-way communication between the PC and the electronic price tag terminal.

Preferably, multiple cash registers are connected to the PC.

Preferably, the display can display information such as the name of the product, the place of origin of the product, the unit price of the product, promotional signs, inventory, etc.; the display can be a dot-matrix LCD, a character LCD, a dot-matrix OLED, a digital tube or a custom-made LCD display device .

Preferably, the memory is a memory with an I2C or SPI interface, which can be erased and written more than 10,000 times and can be kept for more than 10 years.

Preferably, the electronic price tag terminal further includes a power supply; the power supply is a device that converts AC220V/50Hz AC power into DC power to provide operating voltage for the display, microprocessor and memory.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art:

1. Effectively reduce the production and maintenance costs of using paper price tags;

2. Avoid arranging communication lines for each electronic price tag terminal, reducing wiring and maintenance costs;

3. It avoids setting up a wireless device for each electronic price tag terminal, reduces the wireless radiation caused by the wireless device, improves the reliability of communication, and does not occupy radio frequency resources.

Description of drawings

Below in conjunction with accompanying drawing, technical solution of the present invention will be further described:

Accompanying drawing 1 is a schematic diagram of the terminal structure of the electronic price tag based on electric power carrier according to the present invention;

Accompanying drawing 2 is a schematic diagram of the implementation structure of the electronic price tag based on electric power carrier according to the present invention;

Among them: 1. Power line; 2. Carrier module; 3. Display; 4. Microprocessor; 5. Memory; 6. Power supply; 7. Electronic price tag terminal; 8. Power carrier communication conversion module; 9. PC; 10 ,checkout counter.

Detailed ways

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

Accompanying drawings 1-2 are electronic price tags based on power carrier according to the present invention, including a control device and an electronic price tag terminal 7; the control device and the electronic price tag terminal 7 are connected through a power line 1; the control device includes Power carrier communication conversion module 8, PC 9, cash register 10; the electronic price tag terminal 7 includes a carrier module 2, a display 3, a microprocessor 4, a memory 5, and a power supply 6; the microprocessor 4 refers to the current Commonly used 8-bit, 16-bit or 32-bit microprocessors, the microprocessor 4 is connected with the carrier module 2, the display 3 and the memory 5 respectively; Duplex or half-duplex asynchronous serial communication port, I2C or SPI interface consistent with the memory 5, can control the interface shown by the display 3; the PC 9 exchanges commodity information with the microprocessor 4 through the carrier module 2; The carrier module 2 can be directly connected to the mains, and the carrier module 2 demodulates the asynchronous serial communication on the microprocessor 4 into carrier communication and sends it to the power line 1, and can also demodulate the carrier communication on the power line 1 into The asynchronous serial communication is sent to the microprocessor 4; the power carrier communication conversion module 8 converts the carrier communication into a communication interface that can be connected to the PC 9, and realizes the two-way communication between the PC 9 and the electronic price tag terminal 7; the micro The processor 4 stores commodity information through the memory 5, and controls the display 3 to display the commodity information; the display 3 can display information such as commodity name, commodity origin, commodity unit price, promotional signs, inventory, etc., which can be dot matrix LCD, character LCD, dot matrix OLED, digital tube or custom-made LCD display device; the memory 5 is a memory with I2C or SPI interface, which can be erased and written more than 10,000 times and can be kept for more than 10 years. Store commodity information, store parameter values of electronic price tag terminal operation, and store electronic price tag terminal address codes; the power supply 6 is a device that converts AC220V/50Hz AC power into DC power, and is a display 3 and a microprocessor 4 And memory 5 provides working voltage; Described PC 9 is connected with a plurality of cash registers 10, is convenient for transaction.

When in use: before the electronic price tag terminal 7 is put into use, an address code that is not repeated with other electronic price tag terminals 7 is written in the fixed address in the memory 5 . After the electronic price tag terminal 7 is powered on, the microprocessor 4 and the display 5 are initialized. Judging whether there is commodity information in the memory 5 for display, if there is no commodity information, then wait for the delivery of the information, if there is commodity information, then read the commodity information from the fixed address of the memory 5 and put it into the RAM of the microprocessor 4, and Convert the data in the RAM into a certain format and send it to the display 3 for display; the PC 9 in the control device sends information in a circular scrolling manner, and each frame of information contains the address code of each electronic price tag terminal 7 corresponding to the electronic price tag terminal 7 Commodity information; each electronic price tag terminal 7, after receiving the information sent by the PC 9 in the control device, analyzes whether the address code in the information is the same as the address code of the terminal, and does not perform any processing if it is different. Then take out the product information from the received information, if the product information taken out is inconsistent with the product information in the memory 5, the microprocessor 4 in the electronic price tag terminal 7 thinks it is new product information, and saves this information in the The display content of the display 3 is refreshed in the memory 5, and at the same time, the electronic price tag terminal 7 returns a response message to the PC 9 of the product management system to show that the electronic price tag terminal 7 is normal. The commodity information is consistent, and the commodity information is no longer stored in the memory 5 of the electronic price tag terminal 7 .

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art:

1. Effectively reduce the production and maintenance costs of using paper price tags;

2. Avoid arranging communication lines for each electronic price tag terminal, reducing wiring and maintenance costs;

3. It avoids setting up a wireless device for each electronic price tag terminal, reduces the wireless radiation caused by the wireless device, improves the reliability of communication, and does not occupy radio frequency resources.

The above are only specific application examples of the present invention, and do not constitute any limitation to the protection scope of the present invention. All technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims (8)

1. An electronic price tag based on a power carrier, characterized in that: it includes a control device and an electronic price tag terminal; the control device and the electronic price tag terminal are connected through a power line; the control device includes a PC; the electronic The price tag terminal includes a carrier module, a display, a microprocessor and a memory; the microprocessor is respectively connected to the carrier module, the display and the memory; the PC exchanges commodity information with the microprocessor through the carrier module; the microprocessor The commodity information is stored through the memory, and the display is controlled to display the commodity information. 2. The electronic price tag based on power carrier according to claim 1, characterized in that: the microprocessor refers to the currently commonly used 8-bit, 16-bit or 32-bit microprocessor; It is provided with a full-duplex or half-duplex asynchronous serial communication port communicating with the carrier module, an I2C or SPI interface consistent with the memory, and an interface capable of controlling the display. 3. The electronic price tag based on power carrier according to claim 1, characterized in that: the carrier module can be directly connected to the mains, and the carrier module demodulates the asynchronous serial communication on the microprocessor into a carrier The communication is sent to the power line, and the carrier communication on the power line can also be demodulated into asynchronous serial communication and sent to the microprocessor. 4. The electronic price tag based on power carrier according to claim 1, characterized in that: the control device also includes a power carrier communication conversion module and a cash register; the power carrier communication conversion module converts the carrier communication into a PC The communication interface that can be connected realizes the two-way communication between the PC and the electronic price tag terminal. 5. The electronic price tag based on power carrier according to claim 4, characterized in that: multiple cash registers are connected to the PC. 6. The electronic price tag based on power carrier according to claim 1, characterized in that: the display can display information such as product name, product origin, product unit price, promotional signs, inventory, etc.; the display can be a dot Array LCD, Character LCD, Dot Matrix OLED, Nixie tube or customized LCD display device. 7. The electronic price tag based on power carrier according to claim 1, characterized in that: the memory is an I2C or SPI interface memory, which can be erased and written more than 10,000 times and can be kept for more than 10 years. of memory. 8. The electronic price tag based on power carrier according to claim 1, characterized in that: the electronic price tag terminal also includes a power supply; the power supply is a device that converts the mains AC220V/50Hz alternating current into direct current, Provides operating voltage for display, microprocessor and memory.