A Bionic Hair-Crack Sensor Inspired By Scorpion Mechanoreceptor Ultrasensitive Mechanism

Under the background of the rapid development of the national economy and the continuous improvement of the level of informatization,sensor technology,as an important measure of the development strength of a country,needs further development.Sensors are widely used not only in medical,environmental,military,industrial and agricultural applications,but also in transportation,health care,and home.In nature,there are also a variety of sensing systems for living things,for them to input,control and output external information,which coincides with the working process of the sensor.Nowadays,bionic science is in the ascendant,and the excellent sensing ability of bio-natural has become a rich source of inspiration for sensor research.Various bionic sensors have emerged,and traditional sensors have been improved from various angles such as structure and materials,leading the development of sensing technology.A new direction,opened up new fields and wrote a new chapter.Based on the principle of bionics,this paper selects the typical arthropod scorpion as the research sample,observes the morphological and structural characteristics of the slit sensilla and trichobothria,and analyzes the sensing mechanism of the two;designing the Bionic Hair-Crack sensing element and theoretical calculation And simulation analysis;the production of the burr-coupled sensor and the application performance test,a new attempt and exploration for the manufacture of ultra-sensitive bionic sensors.The main research contents and conclusions of this paper are as follows:First of all,select four kinds of typical scorpions(Hottentotta trilineatus,Parabuthus transvaalicus,Buthus martensii,and Heterometrus petersii)as biological prototypes.The surface morphology and internal structure of the slit sensilla and trichobothria were characterized by stereo microscope,scanning electron microscope,ultrathin section and X-ray three-dimensional microscope.The slit sensilla was composed of multiple slit units.The overall arrangement is radial,the length is increased in order,the width is substantially unchanged,and the trichobothria is inserted into a large cup-shaped socket in a high aspect ratio hair rod.Then,based on the morphology,structural features and size parameters of the two,the model of Bionic Hair-Crack sensing element is established,and the static and dynamic mechanical calculations and ANSYS Workbench simulation are carried out to explore the influence of different factors on its mechanical properties.For static mechanical properties,the bristle structure can effectively concentrate the strain on the base and increase the strain value.The joint structure induces stress concentration and further increases the stress value.The order of the influencing factors is: length ratio and joint structure.Number,modulus of elasticity ratio;for dynamic mechanical properties: the key factor affecting the natural frequency of the Bionic Hair-Crack sensing element is only the length ratio.Finally,based on the theoretical model of the Bionic Hair-Crack sensing element,the Bionic Hair-Crack sensor is fabricated and applied to strain,vibration and flow measurement,and the sensing performance is analyzed separately.For strain sensing applications,the sensitivity of the GF is up to 479,the response time is 74 milliseconds,the recovery time is 86 milliseconds,and it is stable after 2000 stress cycle measurements,with good durability.It is proved that the Bionic Hair-Crack sensor can be well applied to strain detection.For vibration sensing applications,the maximum sensitivity is 18186.858mv/g,the average sensitivity is 9908.93mv/g,and the sensitivity interval is 11mv/.g~18186.858mv/g;frequency response range is 0~1000Hz;range is between 0~5g;and the longer the sample stem length,the higher the sensitivity to low frequency excitation;for flow sensing applications,detection The complete output signal of the burr-bonded sensor during the airflow impact process shows that the Bionic Hair-Crack sensor produces a resistance change signal at 3.87s;and the Bionic Hair-Crack sensor with different lengths is subjected to a wind speed of 1m/s~7m/s.The output resistance is detected.The result shows that there is a nonlinear relationship between the output resistance and the wind speed,and the longer the length of the rod,the larger the corresponding resistance.