Abstract: This paper introduces the working principle of the resistance strain gauge sensor, focuses on the hardware circuit structure and proportional measurement method of the electronic balance, and provides a software design flowchart of the system. The paper also explains the measures taken to improve the system accuracy and finally presents the technical specifications achieved by the electronic balance. Keywords: Resistor strain type sensor; Electronic scales; Proportional measurement [b][align=center]The Design of Electronic Scales Based on Resistor Strain Type Sensor GUO Huai-tian, LI Bao-hua, ZHAO Yu-xia, CAO Yan-bo[/align][/b] Abstract: This article introduces the working principle of resistor strain type sensor, the hardware circuit structure, and the proportion measuring technique in electronic scales. The system programming flow diagrams are illustrated. The article also introduces techniques for precision improvement in the system, and finally, the accuracy of the electronic scales is given. Key words: resistor strain type sensor; electronic scales; proportion measurement Electronic balances have a series of advantages such as fast measurement speed, high accuracy, simple and convenient operation, automatic calibration, and automatic tare, making them widely used in national defense, scientific research, industry, agriculture, and people's daily lives. The core component of an electronic balance is the load cell. Resistor strain type sensors, due to their high accuracy, good stability, convenient manufacturing, mature technology, and low price, have been applied to almost all weighing fields and various force measurement fields. 1. Working Principle of Resistance Strain Gauge Sensors Resistance strain gauge sensors consist of three parts: a pressure-sensing device, a resistance strain gauge, and a Wheatstone measurement circuit. Their working principle is as follows: the load being measured acts on the elastic pressure-sensing device, causing it to undergo elastic deformation; an adhesive substance causes the resistance strain gauge, which is attached to the pressure-sensing device, to deform, thus converting it into a change in resistance; the Wheatstone measurement circuit converts this change in resistance into an electrical signal output proportional to the load. For details, please click: Development of an Electronic Balance Based on a Resistance Strain Gauge Sensor