Design Of Low Power Data Acquisition And Transmission Module Based On GPRS

In order to achieve the remote wireless data gathering and transmission, to satisfy the different needs of data gathering in various situations, this thesis designs a remote wireless data gathering transport module that based on the General Packet Radio Service(GPRS) wireless communication network technology. This module can realize the remote acquisition of pulsed quantity analog signal and digital signal, as well as other datas, then utilizes the GPRS wireless communication network or sends the short message to upload datas in time, besides, you can choose to upload the datas to the servicer or the user’s mobile phone. Once the system worked, the automatic data acquisition, processing, and wireless transmission would be achieved without manual intervention. Thus, through the practical application of this system, the difficulties of remote wireless gathering and the labor cost would be reduced increasingly.By means of the user requirement analysis and the research of the same type at home and abroad, this thesis gives a specific precept to enforce the system and proceeds argument about the feasibility of the system. According to the appointed precept, through the numerous related documents and the research of chip product manuals, the system selects and uses the ARM embedded micro-processor of 32-bit RISC framework as the systemic main control chip. It also selects the embedding operating system of μC/OS-Ⅲ, greatly enhancing the controllability and operability of this system; using the SIM800C GPRS wireless transceiver module of Simcom company serves as wireless communication module, and takes advantage of GPRS network, and based on the TCP/IP protocol to conduct datas teletransmission. This system of data transmission adopts battery power supply. When designing this system, it takes low-power disposing of each module in hardware; in order to guarantee the systemic cruising power, the system takes the overall power consumption problem into consideration, via the study of lower-energy-dissipation and the analysis of system function. At the same time, it utilizes the micro-controller to regulate of every part in hardware, and via the management of the system working frequency to reduce the power consumption of the system up to the hilt. This system partly adds forecasting function of lithium primary battery which belongs to the power management, furthermore, this function is not only let the forewarning of outage come true, but also realize the continuous endurance of system and cut down the risk of data loss during the battery renewal period, which never comes up in the human history.In the course of software implementation, the thesis gives different design thought and specific realizing process about data collection, transmission, detection, and power dissipation conditioning. The overall power consumption of system would be decreased immensely in the event of real-time switch that the software conducts different mode in the system, as well as the systemic working frequency dynamic management of different work patterns.After finish the construction work of hardware platform and the compilation of the software, the debug and the tests for the functional and technical indicators are conducted. Through the analysis of the test data, it proves that the system can meet the needs of user function, the technology also reaches the expectations of technical indicators. Meanwhile, the system is better than the majority of other similar products in terms of power consumption, this can be known through the test of system power consumption and the comparison with the previous similar designs. Finally, it enormously increases the versatility and portability of the system, because the whole system adopts a modular design method; what is more, it also owns referential meaning of exploiting other similar modules.