4results about How to "Control sensitivity" patented technology

The invention provides a lens group, an optical system and electronic equipment. The lens group comprises a first lens group, a second lens group and a third lens group, and the first lens group comprises a first lens to a fourth lens; the second lens group comprises fifth to eighth lenses; the third lens group includes ninth to thirteenth lenses. 0.86 < = f5 / T45 < = 4.55; 2.65 < = F910 / (CT9 + CT10) < = 3.52; f11 / F1213 is larger than-2.75 and smaller than-1.50, f5 is the effective focal length of the fifth lens, T45 is the air interval between the fourth lens and the fifth lens on the optical axis, F910 is the combined focal length of the ninth lens and the tenth lens, CT9 is the center thickness of the ninth lens, CT10 is the center thickness of the tenth lens, f11 is the effective focal length of the eleventh lens, and F1213 is the combined focal length of the twelfth lens and the thirteenth lens. The lens group can obtain a high-quality telephoto imaging effect.

The invention belongs to the technical field of intelligent wearable electronics, and particularly relates to a preparation method of an MXene / CNTs / TPU fiber membrane flame-retardant flexible strain sensor with a bimodal fold structure. The preparation method comprises the following steps: washing and drying a TPU fiber membrane, soaking the TPU fiber membrane in chloroform (CHCl3) for swelling, and fixing and drying the TPU fiber membrane by using a mold; the pretreated fiber membrane is soaked in a cetyl trimethyl ammonium bromide (CTAB) solution to be subjected to modification treatment; then the TPU fiber is put into an MXene / CNTs mixed solution for ultrasonic treatment, so that MXene / CNTs are evenly attached to the surface of the TPU fiber, demolding is conducted after deswelling, and a fiber membrane retracts; and repeating the steps of CTAB (Cetyltrimethyl Ammonium Bromide) modification and MXene / CNTs attachment, so as to prepare the MXene / CNTs bimodal folded conductive fiber membrane with different buckling. Phytic acid (PA) is attached to the surface of the fiber through a repeated impregnation method, then a copper electrode is assembled and packaged with PDMS, and the flame-retardant flexible strain sensor with the bimodal folded conductive structure is obtained.

The utility model discloses an inductance type proximity switch, which relates to the technical field of inductance type proximity switches and comprises a first protective shell, a proximity switch body is in threaded connection with one end in the first protective shell, a protective sleeve is fixedly connected with the upper end of the proximity switch body, and a second protective shell is mounted at one end of the first protective shell. Fixing blocks are symmetrically and fixedly connected in the second protective shell, connecting mechanisms are installed in the fixing blocks, fixing mechanisms are symmetrically installed in the upper ends of the first protective shell and the second protective shell, and a first protective column is installed at the end, close to the second protective shell, of the first protective shell; a second protection column is installed at the end, close to the first protection shell, of the second protection shell. By adopting the structure, the inductance type switch can be effectively protected from being influenced by the external environment, so that the service life of the inductance type switch is prolonged, and the inductance type switch can be prevented from being accidentally touched or damaged by an external object.

The application provides a lens set, an optical system and an electronic device. The lens set comprises a first lens set, a second lens set and a third lens set, the first lens set comprises a first lens to a fourth lens, the second lens set comprises a fifth lens to an eighth lens, and the third lens set comprises a ninth lens to a thirteenth lens. 0.86≤f5 / T45≤4.55, 2.65≤F910 / (CT9+CT10)≤3.52, and -2.75<f11 / F1213<-1.50, wherein f5 is the effective focal length of the fifth lens, T45 is the air interval of the fourth lens and the fifth lens on the optical axis, F910 is the combined focal length of the ninth lens and the tenth lens, CT9 is the center thickness of the ninth lens, CT10 is the center thickness of the tenth lens, f11 is the effective focal length of the eleventh lens, and F1213 is the combined focal length of the twelfth lens and the thirteenth lens. The lens set can obtain a high-quality telephoto imaging effect.