Staaf Henrik, Matsson Simon, Sepheri Sobhan, Köhler Elof, Daoud Kaies, Ahrentorp Fredrik, Jonasson Christian, Folkow Peter, Ryynänen Leena, Penttila Mika, Rusu Cristina
RISE Research Institutes of Sweden, Smart Hardware Dept, Gothenburg, Sweden.
Breas AB - Sweden, Mölnlycke, Sweden.
Heliyon. 2024 Apr 2;10(7):e29043. doi: 10.1016/j.heliyon.2024.e29043. eCollection 2024 Apr 15.
From 2007 in US and from 2022 in EU it is mandatory to use TPMS monitoring in new cars. Sensors mounted in tires require a continuous power supply, which currently only is from batteries. Piezoelectric energy harvesting is a promising technology to harvest energy from tire movement and deformation to prolong usage of batteries and even avoid them inside tires. This study presents a simpler method to simultaneous model the tire deformation and piezoelectric harvester performance by using a new simulation approach - dynamic bending zone. For this, angular and initial velocities were used for rolling motion, while angled polarization was introduced in the model for the piezoelectric material to generate correct voltage from tire deformation. We combined this numerical simulation in COMSOL Multiphysics with real-life measurements of electrical output of a piezoelectric energy harvester that was mounted onto a tire. This modelling approach allowed for 10 times decrease in simulation time as well as simpler investigation of systems parameters influencing the output power. By using experimental data, the simulation could be fine-tuned for material properties and for easier extrapolation of tire deformation with output harvested energy from simulations done at low velocity to the high velocity experimental data.
在美国，自2007年起，在欧盟，自2022年起，新车必须使用胎压监测系统（TPMS）。安装在轮胎中的传感器需要持续供电，目前仅靠电池供电。压电能量采集是一项很有前景的技术，可从轮胎的运动和变形中采集能量，以延长电池使用寿命，甚至避免在轮胎内部使用电池。本研究提出了一种更简单的方法，通过使用一种新的模拟方法——动态弯曲区，同时对轮胎变形和压电采集器性能进行建模。为此，将角速度和初速度用于滚动运动，同时在模型中引入角极化，使压电材料能从轮胎变形中产生正确的电压。我们将COMSOL Multiphysics中的这种数值模拟与安装在轮胎上的压电能量采集器的实际电输出测量相结合。这种建模方法使模拟时间减少了10倍，同时更便于研究影响输出功率的系统参数。通过使用实验数据，可以针对材料特性对模拟进行微调，并且更易于将低速模拟得到的轮胎变形与采集的输出能量外推到高速实验数据。
