Tactile sensation can be further divided into touch sensation, pressure sensation, and slip sensation in smart equipment. Such sensors include optical tactile sensors and piezoresistive array tactile sensors. Slip sensor, etc., in which slip sensor is a necessary condition to realize the robot's grasping function. In addition to the above five human sensations, some physical sensors also have a sensation beyond the human body. For example, a biosensor can measure blood pressure, body temperature, etc. Environmental sensors can measure temperature and humidity, air dust particle content, ultraviolet light intensity and so on. These sensors beyond human senses are now matched by wearable devices. Wearable devices are thus given the function of expanding human senses.
With the technological progress of micro-electromechanical systems (MEMS), laser pointer technology, high-tech materials, etc. The research and development of sensors shows a diversified trend. Some use biological materials to simulate human skin. The tactile sense of innovative sensors; some use MEMS technology to develop miniature intelligent sensors. This is conducive to the integration of complex systems; some use high-precision laser technology to create lidar, which is conducive to the system's real-time perception of surrounding obstacles and the environment. However, in general, the sensor development process presents a two-stage trend: 1. Technological innovation, developing new products based on unmet needs. In the first stage, the direction of sensor R&D and innovation stems from the needs of smart equipment and innovative equipment. R&D personnel innovate new sensors according to the needs of use. 2. Cost reduction, application landing, and products gradually meet the needs of industrialization. In the second stage. In the process of research and innovation. In order to meet people's demand for industrialized applications of intelligent equipment. Researchers have shifted their focus from technology development to focus on cost reduction. In order to realize the large-scale production of laser pointer sensors and the vision of industrialized application of intelligent equipment.