KR-102965286-B1 - Triboelectric generator with sealed space and smart menu using the same

Abstract

The triboelectric element of the present invention comprises a negative charge body, a positive charge body installed at a predetermined distance from the negative charge body, a spacer maintaining the distance between the negative charge body and the positive charge body, a negative electrode that extracts a charge generated in the negative charge body by friction between the negative charge body and the positive charge body, a positive electrode that extracts electrons generated in the positive charge body by friction between the negative charge body and the positive charge body, and a charge storage unit that stores the charges extracted from the negative electrode and the positive electrode, wherein the space formed in the distance between the negative charge body and the positive charge body is sealed from the outside.

Inventors

• 박진형
• 신재희

Assignees

• 한국기술교육대학교 산학협력단

Dates

Publication Date

20260513

Application Date

20240320

Claims (6)

1. Entire College of Music: Two main bodies installed at a predetermined distance from the above main body; A spacer maintaining the gap between the above-mentioned entire sound group and the entire sound group; A negative electrode that extracts the charge generated in the negative electrode by friction between the above negative electrode and the positive electrode; A positive electrode that extracts electrons generated in the two main bodies due to friction between the above negative and positive main bodies; and It includes a charge storage unit that stores charges drawn from the above negative electrode and positive electrode; and In a triboelectric element characterized by the space formed in the gap between the above-mentioned negative and positive electrodes being sealed from the outside, It further includes an elastic expansion membrane that seals the space between the above-mentioned main body and the above-mentioned two-body, and The above negative electrode and negative electrode or positive electrode and positive electrode are made of a flexible material, and The above elastic expansion membrane elastically expands as the sealed space between the negative and positive bodies is subjected to pressure, thereby increasing the volume of the sealed space, and A triboelectric element characterized by having a spaced-apart space formed between the spacer and the elastic expansion membrane, and allowing gas to move through the spaced-apart space via a gas passage.
2. In claim 1, A triboelectric element characterized by the above spacer being coupled to seal the space between the upper negative charge and the lower positive charge.
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6. In a smart menu board that wirelessly transmits customer menu selection information to a management server, A content sheet containing food type and price information, and displaying a menu selection button and an order button; A menu board driving element comprising: a pressure sensor formed at a position corresponding to the menu selection button and order button display area of the content sheet, and a transmitting circuit unit that wirelessly transmits information regarding the operation status of the menu selection button and order button to an external server; A smart menu board characterized in that the pressure sensor is composed of a triboelectric element according to any one of claims 1 to 2.

Description

Triboelectric generator with sealed space and smart menu using the same The present invention relates to a closed-space type triboelectric element and a smart menu board using the same, and more specifically, to a triboelectric element that improves electricity generation efficiency by forming a closed space between a negative electric element and a positive electric element, and a smart menu board using the same. Triboelectric power generation is a power generation device that produces electricity by utilizing the transfer of electric charges through friction between materials that retain positive charges well (human body, water, wood, wool, nylon) and materials that retain negative charges well (polymers, polyester fibers). As electric charges accumulate on the positive and negative materials through friction, and when connected to an electric circuit, LED, or capacitor with opposite polarity, electricity flows due to the potential difference, which can be used as a power source for various types of electronic devices. A prior art document regarding a triboelectric generator is Korean Registered Patent No. 2312839. The aforementioned prior art document discloses a triboelectric generator comprising a negative charge generating body that generates a negative charge by contact and separation with a positive charge generating body, and a negative electrode inserted into the negative charge generating body, wherein the negative charge generating body is a polysiloxane-based polymer compound and the polysiloxane-based polymer compound has a surface potential of -700 mV to -1200 mV as measured by a Kelvin probe force microscope. The most important factor in such triboelectric generators is power generation efficiency. Conventional development directions to improve the power generation efficiency of triboelectric generators have primarily focused on the development of charging materials and improvements in friction methods. Meanwhile, as industries have recently developed, labor costs—the compensation for human labor—have also been rising. In the food service industry, such as restaurants, personnel for tasks like food preparation and hall service are essential; in particular, the labor intensity for staff taking customer orders is high, and the resulting wage increases are recognized as a concern for the food service industry. Recently, kiosks have emerged to replace human order taking and payment, serving as an alternative to reduce labor costs; however, they pose another challenge for generations unfamiliar with kiosk operation, and are also causing delays and errors in orders. One technology designed to replace such hall service is smart menu board technology. Smart menu boards are evolving beyond the traditional function of displaying food types and prices, incorporating various sensors and communication methods. In particular, if these smart menu boards feature wireless communication capabilities, they offer the advantage of aligning with the recent social trend of the growing non-face-to-face culture. A relevant prior art document is Japanese Patent Publication No. 2003-44930. The aforementioned prior art document discloses a menu board displaying food items, characterized by comprising: a food display section on the front of the menu board for displaying food items and prices; an input section below the display section for inputting food items to be ordered; a quantity input section for inputting the quantity of food items to be ordered; a display section for displaying the input content; a transmitter section for wirelessly transmitting the order content; and a power supply section powered by a solar cell. However, since solar cells have difficulty generating electricity in dimly lit areas, they present a problem in that they are difficult to use in dimly lit restaurants. Another problem with conventional smart menu boards is the issue of cost. Ordinary restaurants often handle as few as 10 or as many as 20 to 30 food items, and to fit all of these items into a single menu board, the smart menu board must either take the form of a tablet PC combining a CPU and a display device, or consist of multiple devices containing multiple menu contents. Therefore, there is a great need to develop a new type of smart menu board that is capable of communicating to replace human food ordering, operates stably without fluctuations in electricity generation depending on the surrounding environment, and can display and operate various types of food menus simultaneously. Figure 1 shows the structure and operation process of a piezoresistive pressure sensor. Figure 2 shows the change in resistance detected by a piezoresistive pressure sensor. Figures 3 and 4 are diagrams for explaining the operation of a triboelectric element and the principle of electricity generation. FIGS. 5 and 6 illustrate the structure of a triboelectric element that can be applied to a smart menu board of the present invention. FIG. 7 illustrates t