Design of Ultrasonic Heatmeter Based on TDC-GP2 and MSP430
|Keywords||Ultrasonic heat meter TDC-GP2 MSP430F413 M-BUS TSS721A|
With the development of the thermal energy billing demand , Western energy metered way in the country has a huge demand. However, the high price of imported heat meter is not conducive to popularity in the country , must be developed in line with China 's national conditions , heat table . Heat meter in the emerging industry in China is still in its infancy , the level of development is significantly behind in foreign countries. The purpose of this research is the use of ACAM company TDC-GP2 temperature flow measurement chip and TI's chip MSP430F413 development and design of low-power intelligent heat meter . The content of this study include the following aspects : (1) ultrasonic heat meter measuring principle as well as analysis of the method of calculation of heat , to clarify the method of calculation of heat baking difference method and the thermal coefficient method both to explain this topic in the heat thermal coefficient method this method should be adopted reasons . Prove the Re Nengxi number density correction method provides a theoretical basis for the design of thermal energy in the system software computing functions . (2 ) make a detailed description , in addition to the common temperature sensor and transducer characteristics , classification analysis , the core chip TDC-GP2 and the MSP430F413 and M-BUS of interface chips TSS721A the features in this topic select a sensor and transducer in accordance with the requirements of this topic . ( 3 ) design of the the heat meter hardware circuit system , the hardware circuit must be designed to ensure that low-power . Hardware designed to clarify the design ideas, given all circuits , as well as parts lists , and each circuit analysis . Mainly include temperature acquisition circuit , traffic acquisition circuit , integrator circuit ( M , M -BUS circuit connection of the liquid crystal display and easy button . (4) of the system software design for software designed to clarify the thinking and the process map, as well as an important program , and software design of the platform and C430 language programming methods were analyzed . theoretical basis of the thermal calculation and system hardware and software design are described in this article , provides for the further study of such intelligent instruments reference.