Sensors and Actuators A: Physical ( IF 4.6 ) Pub Date : 2022-07-25 , DOI: 10.1016/j.sna.2022.113776 Bahman Taherkhani , Motaleb Malmir Chegini , Payam Rahmani
The use of structures with a negative Poisson's ratio (auxetic) in the construction of piezoresistive sensors has improved the sensing performance, and they have been considered by many researchers in recent years. However, these auxetic sensors have two main drawbacks, including the instability of the Poisson's ratio during the strain (the sensing property of the sensor will be various at different strains) and the anisotropy of these structures (having variant sensing performances in different directions). It is necessary for a sensor as a measuring device to have the same response at different strains and directions. In this work, a highly sensitive, piezoresistive, silicon/graphite powder-based auxetic sensor with a constant Poisson's ratio along the strain was presented to remove the first mentioned drawbacks by having a linear sensing performance, and its performance was compared with their counterparts. The sensing performance of the proposed sensor has improved up to 18 % and 120 % in comparison with the previous mix of silicon/chopped carbon auxetic and conventional mix sensors, respectively. The main difference is that it has linear performance during strain, which is due to having the constant Poisson's ratio during the strain. To remove the second defect, two dimensional (2D) planar isotropic auxetic structures were suggested for the construction of piezoresistive auxetic sensors and these structures will be used to manufacture auxetic sensors in our future work.
中文翻译:
具有线性传感性能的高灵敏度压阻式硅/石墨粉拉胀传感器
在压阻传感器的构造中使用具有负泊松比(拉胀)的结构提高了传感性能,近年来被许多研究人员考虑。然而,这些拉胀传感器有两个主要缺点,包括应变期间泊松比的不稳定性(传感器在不同应变下的传感特性会有所不同)和这些结构的各向异性(在不同方向上具有不同的传感性能)。作为测量装置的传感器必须在不同的应变和方向上具有相同的响应。在这项工作中,一种高灵敏度、压阻式、基于硅/石墨粉的拉胀传感器具有恒定的 Poisson' 提出了沿应变的 s 比,以通过具有线性传感性能来消除第一个提到的缺点,并将其性能与它们的对应物进行比较。与之前的硅/短切碳拉胀剂混合传感器和传统混合传感器相比,所提出传感器的传感性能分别提高了 18% 和 120%。主要区别在于它在应变期间具有线性性能,这是由于在应变期间具有恒定的泊松比。为了消除第二个缺陷,二维(2D)平面各向同性拉胀结构被建议用于构建压阻式拉胀传感器,这些结构将在我们未来的工作中用于制造拉胀传感器。与之前的硅/短切碳拉胀剂混合传感器和传统混合传感器相比,所提出传感器的传感性能分别提高了 18% 和 120%。主要区别在于它在应变期间具有线性性能,这是由于在应变期间具有恒定的泊松比。为了消除第二个缺陷,二维(2D)平面各向同性拉胀结构被建议用于构建压阻式拉胀传感器,这些结构将在我们未来的工作中用于制造拉胀传感器。与之前的硅/短切碳拉胀剂混合传感器和传统混合传感器相比,所提出传感器的传感性能分别提高了 18% 和 120%。主要区别在于它在应变期间具有线性性能,这是由于在应变期间具有恒定的泊松比。为了消除第二个缺陷,二维(2D)平面各向同性拉胀结构被建议用于构建压阻式拉胀传感器,这些结构将在我们未来的工作中用于制造拉胀传感器。这是由于在应变期间具有恒定的泊松比。为了消除第二个缺陷,二维(2D)平面各向同性拉胀结构被建议用于构建压阻式拉胀传感器,这些结构将在我们未来的工作中用于制造拉胀传感器。这是由于在应变期间具有恒定的泊松比。为了消除第二个缺陷,二维(2D)平面各向同性拉胀结构被建议用于构建压阻式拉胀传感器,这些结构将在我们未来的工作中用于制造拉胀传感器。