Tactile sensor and ultrasonic sensor application

- Jun 07, 2019-

Tactile sensor application


●Industrial manufacturing


In all aspects of industrial production, almost all sensors are needed for monitoring, and the data is fed back to the control center to timely intervene in the abnormal nodes that occur to ensure the normal production of industrial production. A new generation of smart sensors is the “heart” of the smart industry, which keeps the production process running and keeps workers away from production lines and equipment, ensuring personal safety and health.


For example, the car manufacturing workshops of famous automobile manufacturers Tesla, BMW, etc. are almost empty, relying on industrial robots to complete assembly, painting, inspection and other work. The tactile sensor will give the robot a more human-like touch, and complete more dexterous tasks such as grasping, gripping, pinching, clamping, pushing, pulling, etc., to achieve more functions.


●Prosthesis


Prosthetics can restore some of the patient's behavioral functions, however, his tactile recovery has not been achieved so far. The emergence of tactile sensors may bring a new dawn to the tactile recovery of amputated patients. For a long time, many research teams at home and abroad have been working on research in related fields.


In 2015, researchers at Case Western Reserve University in Cleveland, Ohio, USA, obtained a tactile sensation by attaching pressure sensors to the peripheral nerves of the prosthetic user's arm.


In 2018, the team of Stanford University's Bao Zhenan developed a sensor component that is almost completely transparent and has good elasticity. This sensor element can even clearly perceive the "tactile" caused by a fly or butterfly staying on its surface.


● Wearable electronics


In recent years, with the continuous breakthrough and innovation of flexible electronic related technologies, wearable tactile sensing devices have developed rapidly. They can mimic the tactile function of human beings in direct contact with the external environment, and realize the detection of force signals, heat signals and wet signals. They are the nerve endings of the Internet of Things and help humans to fully understand nature and their core components.


Wearable tactile sensing devices are typically constructed on an elastic substrate or a stretchable fabric for flexibility and scalability. With the rapid development of materials science, flexible electronics and nanotechnology, the basic performance of the device such as sensitivity, range, size and spatial resolution has improved rapidly.


In order to adapt to the sensing requirements of force, heat, humidity, gas, biology, chemistry and other multi-stimulus resolution, the device design is more compact and the integration scheme is more mature.

Smart sensor devices with practical functions such as biocompatibility, biodegradability, self-repair, self-energy and visualization have emerged. At the same time, wearable electronic products are moving toward integration, which effectively integrates tactile sensors with related functional components (such as power supplies, wireless transceiver modules, signal processing, actuators, etc.) for specific applications, thereby continuously improving the user experience.


Although the research in the field of tactile sensing has made many breakthroughs in recent years, it still faces many challenges in practical applications, such as performance degradation of sensors during repeated deformation, multi-dimensional, multi-stimulus simultaneous detection of crosstalk solutions. Coupling, matching force, thermal and electrical performance between devices within the integrated sensing system.
These challenges have brought new development opportunities and pointed out future directions for related material preparation, device processing and system integration. There is no doubt that the touch sensor will be more flexible, miniaturized, intelligent, multi-functional, and humanized. The applicable boundary will also be greatly expanded, playing a more irreplaceable role in more fields.


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