Investigation of Interface Oil Insufficiency in a Strain Gauge Type Pressure Sensor

Soltani, Kamran; Rezazadeh, Ghader; Henry, Manus; Bushuev, Oleg

doi:10.1007/s11220-021-00376-w

Cited by 1 publication

(1 citation statement)

References 23 publications

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“…Tactile sensors have been used to measure the contact stimuli such as pressure, [ 1,2 ] temperature, [ 3 ] humidity, [ 4 ] and to provide tactile information for the applications in human–machine interaction, [ 5 ] health monitoring, [ 6 ] and motion detection. [ 7 ] For complex shaped objects, tactile sensor needs to be conformally integrated onto their curved surface, which brings technical challenges to the structural design and fabrication of flexible tactile sensor and limits their applications.…”

Section: Introductionmentioning

confidence: 99%

Kirigami Design of Flexible and Conformal Tactile Sensor on Sphere‐shaped Surface for Contact Force Sensing

Wang

Chen

et al. 2022

Adv Materials Technologies

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tactile sensor and limits their applications. Functional elastomers [8,9] and novel structures [10][11][12][13] such as island, bulk, helical, and kirigami structures have been proposed to develop flexible tactile sensors, their stretchable abilities can be greatly enhanced. However, most of the developed flexible tactile sensors still cannot fit well with complex shaped objects due to their intrinsic stiffness. The initial states and sensing performance of tactile sensor before and after being integrated onto curved surfaces will also be changed due to stretching and/or compressing. Therefore, the development of flexible tactile sensor with the ability to integrate onto curved surfaces of objects with low assembly strain and/or stress remains a technical challenge.Several methods have been proposed for the development of flexible and conformal tactile sensors, they can be classified into two categories: 1) direct fabrication of tactile sensor on target curved surface of objects; 2) convert tactile sensor with flat surface into curved surface with external stimuli. For the first type of methods, transfer printing, [14] inkjet writing, [15,16] laser direct writing, [17] and curved-surface lithography [18] have been utilized to directly fabricate the sensor on the object's surface. For instance, Harnois et al. [19] reported a water transfer printing method which could integrate large-area films with electronics onto daily life objects. A bent capacitive touchpad was fabricated based on this method. But the touchpad could only qualitatively detect finger movements because of the performance changed caused by assembly strain of capacitive units. And the characterizing sensing elements directly on curved surface is complicated and inefficient. As for the latter method, assembly of electronic sensors via external stimuli [20] and kirigami design [21,22] have been reported. Hu et al. [23] proposed a kirigami method to design deformable structures for humidity sensor. This sensor could attach on the elbow to monitor the sweating condition. However, the induced internal assembly strain and stress are inevitable and will affect the sensing performance of the sensor as 2D flat sensor converts into 3D shape. Thus, reducing the assembly strain and stress for the flat-surfaced sensor onto curved surface would be crucial for the development of flexible tactile sensors, and become one goal of this research.

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