The invention belongs to the technical field of sensing, and in particular relates to a flexible force
tactile sensor based on a transparent
biomaterial, a sensitive element and preparation methods ofthe flexible force
tactile sensor and the sensitive element. The sensitive element comprises a water-retaining layer substrate and hydrogel wrapped with the water-retaining layer substrate, wherein solute of the hydrogel is prepared from
sodium alginate,
ethylenediamine tetraacetate disodium
calcium and glucono
delta-
lactone according to a
mass ratio of 2 to (0.5-1.5) to (0.5-1.5), wherein the
mass concentration of the
sodium alginate is 2-6%. The sensor comprises the sensitive element, a measuring circuit, an analog-to-digital (AD) conversion circuit and a
display device which are sequentially connected in a wired or
wireless way. According to the preparation method, the ionic-crosslinked sustained release
system hydrogel is used as a sensor main body, and
calcium ions in ethylenediaminetetraacetate disodium
calcium are slowly released by using the glucono
delta-
lactone, ionic crosslinking is formed by the calcium ions and a
sodium alginate
monomer, the water molecules are connectedinside a mesh structure, and then certain
water conservation measures are utilized, so that the
moisture emission is reduced, and the stability of the sensor is maintained.