Research On Improving Technologies For Self-energy Wireless Monitoring System In Coal Mine

Sensors traditional wired monitoring the existence of wiring difficulties, communication difficulties and energy supply difficulties and other problems can not meet the monitoring requirements of modern coal mine, with the help of vibration energy harvesting and wireless sensor network technology designed mine from energy harvesting wireless monitoring system can be very good solution coal mine complex environment monitoring equipment problems. Our previous vibrational energy collection system developed by the presence of energy harvesting and low efficiency, therefore, committed to this article of mine from the performance and efficiency of energy harvesting wireless monitoring system to enhance technology research.This paper systematically analyzes the influence factors of the performance of wireless monitoring system based on vibration energy harvesting technology, from energy harvesting, energy storage and energy aspects start to design a new generation of energy harvesting module can replace multiple directions vibration energy harvesting devices, circuits, and improved energy harvesting wireless monitoring module energy-saving strategies.Transducer structure for energy collection device complexity, damping and other issues, To optimize the design, design of a replaceable energy harvesting module multi-directional vibration energy collection device, a mathematical model of a single energy harvesting modules, electromechanical and analyze the dynamic characteristics coupling performance, and with the ANSYS finite element software means for dynamic simulation, optimization means spring, mass, size or piezoelectric ceramics and other key parameters.Design of new energy harvesting circuit connected in parallel to the original basis of the six-way energy harvesting circuit to solve the piezoelectric ceramic transducer in the electromechanical coupling process high impedance, high voltage, minimum current problems; the same time, wireless monitoring module proposed energy-saving strategies to reduce the power consumption, extend the monitoring period in order to improve system performance.Finally, theoretical calculations and simulation based on the optimization of the energy collection device, experimental design and build an experimental platform, the modules function verification system. By analyzing the experimental data, improved energy collection apparatus means than the original maximum peak voltage can be increased about 11 times, the maximum output power 28.75?W. By commissoning the overall system, its performance to meet the functional requirements.