Tasarım of El Tipi Akıllı Multimetre
Abstract: Digital multimeter is a basic measuring instrument for multi-functional electrical parameter measurement, which has been widely used in various fields such as industry, national defense, scientific research, and life. In recent years, hand-held smart multimeters have been widely loved by people because of their portability, low price, and low power consumption. On the basis of the 41st Research Institute of China Electronics Technology Group entrusting our school to develop a high-performance digital multimeter, this paper proposes the design task of a small-sized, low-power, high-precision, intelligent hand-held multimeter functional circuit to meet specific applications. field needs. The appearance structure of the handheld smart multimeter designed in this paper is consistent with the physical size of the ordinary handheld digital multimeter, and it needs to have a LAN network interface, a USB charging circuit, and a high measurement accuracy. Its circuit mainly includes three parts: power management, digital system and measurement circuit, and STM32F103RBT6 is used as the core processor to collect and control the signal. Based on the commission of the 41st Research Institute of China Electronics Technology Group to develop a high-performance digital multimeter, this paper conducts research on small size, low power consumption, high precision, and intelligence, and discusses the overall design of the multimeter. Hardware circuit design, software design and analysis of the source of errors in the circuit. On the basis of ensuring the measurement accuracy and technical indicators, this design completes the basic measurement functions, and at the same time analyzes the error sources of analog circuits and digital circuits in detail. In the multimeter functional circuit design, in order to meet the design requirements of small size, integrated circuit chips are used instead of discrete components, and the topological structure of the circuit is optimized...
