Scheme 2: select MSP430 processor,

Scheme 2: select MSP430 processor, this processor can process 16 bit data, the instruction system is very simple and easy to use, with a variety of addressing modes (seven operation schemes, four purpose operation schemes), 28 internal instruction operations, and many other types of instructions; the register of this single-chip microcomputer also has internal storage function, in the process of program calculation This feature is very useful. The table lookup algorithm in the design is very useful. Code design in such a processor can complete more standardized and intact programs. The most important feature of this processor is the low power consumption mode. In this mode, the energy consumption is very low, which can be used in many occasions with low energy consumption requirements. This low-power mode can be controlled by programming, flexible application, very convenient. Disadvantages: the working voltage is not + 5V, and an additional + 5V conversion circuit is needed; the I / O port will be broken down in case of over-voltage or over-current; in addition, there is no EEPROM inside, so data storage cannot be realized.Scheme 3: stm32f103rbt6 processor is selected. The processor is equipped with 32-bit m3 core CPU of arm type. This 32-bit processor has the advantages of fast computing speed, low purchase cost and low power consumption. At present, this processor is used in a large number of electronic goods, such as electronic agriculture, electric vehicle, sharing industry and other fields, which have examples of using this product. The operating speed of the processor can reach 72 MHz. The high-speed operation is due to the high-speed operation of internal devices. The biggest feature of STM32 is the large number of input and output interfaces. This processor is also equipped with two analog-to-digital converters. The conversion accuracy reaches 12 data bits and the detection accuracy is very high. It can process 18 analog data. Many parameters of analog-to-digital conversion of the processor can be code controlled and programmable, such as analog-to-digital conversion frequency and multi-channel scanning mode.Scheme selection: because the design needs low cost and the device efficiency needs to be the highest, scheme 2 also needs to carry out power re conversion, the design circuit is complex and the obvious cost is high, scheme 1 can meet the design requirements of the whole system, and the design cost is far less than the other two schemes, so scheme 1 is selected. However, the utilization rate of scheme III can not be better withdrawn, so scheme III is also excluded.