Design Article
Energy harvesting, wireless sensor networks & opportunities for industrial applications
Sebastien Boisseau and Ghislain Despesse, CEA-Leti
2/27/2012 8:45 AM EST
What can we do with less than a 100µW-source?
With the will to increase the number of sensors around us and to respect several economic and environmental constraints, researchers and R&D engineers are looking for new green and unlimited energy sources that will allow to remove batteries or wires and to develop autonomous wireless sensor networks with theoretical unlimited lifetimes. These new sources are based on ambient energy.
Unfortunately, ambient energy is not very powerful -100µW/cm³ is a good order of magnitude for energy harvesters- but is enough for many applications and especially in industry.
From thousand to million sensors in our environment
“More and more sensors”, this is a general will to increase the amount of information collected from equipment, buildings, environments… allowing us to interact with our surroundings, to predict failures or to better understand some phenomena. Many fields are concerned: automotive, aerospace, industry, habitat. Some examples of sensors and fields are presented in figure 1.
Next: Ambient sources
With the will to increase the number of sensors around us and to respect several economic and environmental constraints, researchers and R&D engineers are looking for new green and unlimited energy sources that will allow to remove batteries or wires and to develop autonomous wireless sensor networks with theoretical unlimited lifetimes. These new sources are based on ambient energy.
Unfortunately, ambient energy is not very powerful -100µW/cm³ is a good order of magnitude for energy harvesters- but is enough for many applications and especially in industry.
From thousand to million sensors in our environment
“More and more sensors”, this is a general will to increase the amount of information collected from equipment, buildings, environments… allowing us to interact with our surroundings, to predict failures or to better understand some phenomena. Many fields are concerned: automotive, aerospace, industry, habitat. Some examples of sensors and fields are presented in figure 1.
Figure 1: Million sensors in our surroundings
We have chosen to focus our study on industry, which is one of the most economically attractive areas. In order to reduce machine downtimes, costs of maintenance and costs of broken parts replacements, more and more industrialists are interested in developing (wireless) sensor networks able to collect many information (pressures, vibrations, temperatures) from their equipment to implement predictive maintenance.
Unfortunately, it is difficult to deploy many more sensors with today’s solutions, for two main reasons:
1- Cables are becoming difficult and costly to be drawn (inside walls, on rotating parts)
2- Battery replacements in wireless sensor networks are a burden that may cost a lot in large factories (hundred or thousand sensor nodes).
As a consequence, industrialists, engineers and researchers are looking for developing autonomous wireless sensor networks able to work for years without any human intervention. One way to proceed consists in using a green and theoretically unlimited source: ambient energy.
Unfortunately, it is difficult to deploy many more sensors with today’s solutions, for two main reasons:
1- Cables are becoming difficult and costly to be drawn (inside walls, on rotating parts)
2- Battery replacements in wireless sensor networks are a burden that may cost a lot in large factories (hundred or thousand sensor nodes).
As a consequence, industrialists, engineers and researchers are looking for developing autonomous wireless sensor networks able to work for years without any human intervention. One way to proceed consists in using a green and theoretically unlimited source: ambient energy.
Next: Ambient sources
|
|
|
|
|
Navigate to related information
Horaira
2/28/2012 2:25 AM EST
Good Article... specially gathered all pieces together.
Sign in to Reply
wlad01
3/1/2012 1:10 PM EST
Great article indeed; of course Micropelt offers thermoelectric chip-generators (Fig. 6). 100 uW can already be achieved with a temperature difference of just a couple of degrees. Industrial environments offer larger delta-T's, which can create "milliWatts". Thereby also industrial sensors using radio protocols like WHART or ISA100 can be supported by thermal energy harvesting. - Micropelt Germany -
Sign in to Reply
docdivakar
3/14/2012 10:36 AM EDT
Great summary! Figure 2 says a lot on where to focus for a given application and environment to use the appropriate harvesting technology.
MP Divakar
Sign in to Reply
jeanlucl1
4/12/2012 8:26 PM EDT
Ghislain, Sebastien,
Tres bon article.
Bien cordialement,
Jean Luc
Jean Luc Lembert
10890 Viacha Drive
San Diego, CA 92124
Phone: (858) 212-4950
Sign in to Reply
anne-francoise.pele
7/16/2012 11:25 AM EDT
FYI, Stephane Boisseau and Ghislain Despesse at the CEA-Leti (France) also contributed the article, entitled: "Vibration energy harvesting for wireless sensor networks: Assessments and perspectives".
The link to the article is: http://www.eetimes.com/design/smart-energy-design/4370888/Vibration-energy-harvesting-for-wireless-sensor-networks--Assessments-and-perspectives?pageNumber=2&Ecosystem=smart-energy-design#
Sign in to Reply
anne-francoise.pele
7/20/2012 5:18 PM EDT
Click on the link below to check out the collection of the Design Articles, Case Studies, Product How-To articles, Teardowns, etc... related to energy scavenging that have been published on Smart Energy Designline.
Click here: http://www.eetimes.com/design/smart-energy-design/4372778/Energy-harvesting---Design-archive
Check back frequently. The list will be updated as new articles arrive.
Sign in to Reply
Smile Stone
11/7/2012 12:46 AM EST
It's Awsome!!!
I want more information about it.
because my company has many vibration equipment.
Sign in to Reply