Using energy harvesting technology indispensable precondition, sensors and wireless communication module of power are available. For example, the consumption of 3 axis acceleration sensor current of about 100 & mu; A. Since energy acquisition be weak electricity, if enough to directly drive the sensor, you need to store it to the rechargeable battery and capacitor, and then use them. Fortunately, including wireless module, MCU, memory, the standby current is lower than 1 & mu; A product has very much. In the actual use of wireless sensor network (WSN), extended to drive sensors send data interval a few minutes to several hours, or 1 time 1 day.
In the use of building power generation method, the vibration is converted into electrical energy power generation components became the object of study. Output is proportional to the vibration frequency and amplitude of vibrator. Vibration frequency with bridge as an example, around a few Hz ~ 30 Hz, the size of the specific Numbers for each bridge, material. Therefore, how to enlarge the amplitude of vibrator will be the focus of competition. & other; Compared with miniaturization, (infrastructure oriented power components) should be more focused on increasing capacity & throughout; (a Japanese construction company staff).

In addition, the durability is also an important factor. Watson Wchangeorganisation under the proposition of without a battery replacement, the customer put forward & other; At least 5 years, it is better to place 10 years can also use & throughout; (a Japanese construction company staff). But also need to develop a temperature and humidity, such as freezing resistance to environment better packaging technology. & have spent & have spent & have spent & have spent Omron has now launched in 30 hz frequency input, 0.15 G acceleration vibration, generating more than 100 & mu; W the vibration of the power components of the samples. This is a used & other; Electret & throughout; Material vibration power components, when two opposed area of the electrode due to the changes, vibration induced charge quantity will change, the output current. The company has been working with NEXCO east Japan engineering company, completed the validation testing using the development. The components installed on the pillar of the highway, to confirm capacity, success through wireless communication, send the way of vibration data. In the future, the company also plans on the basis of the data, to monitor the degradation.

for an infrastructure of the wireless sensor network (WSN), the last is a component of energy harvesting. Is abandoned in the usual weak energy is converted into power to take advantage of technology. In terms of infrastructure monitoring purposes, vibration power and small photovoltaic applications are particularly looking forward to it.


In addition to the vibration power generation, photovoltaic power generation is also a kind of feasible way. To the weak light into electricity pigment intensifying type is especially significant to the practical application and development on the solar cell. As long as the development progress of high durability of pigment, short life of the project is expected to practical huge step.