A finger vein recognition device with adjustment function and strong recognition ability

Abstract

The invention relates to a finger vein recognition device with an adjustment function and strong identification ability, which comprises a casing, a socket is arranged on the casing, a frame, an adjustment plate, a support mechanism, an adjustment mechanism, an induction mechanism and a launch mechanism are arranged inside the casing, and the adjustment mechanism It includes a first motor, a buffer block, a first drive shaft, a slider, a pole and a hinge block, the receiving mechanism includes a receiving ring, four drive assemblies and at least two infrared receivers, and the drive assembly includes a connecting rod, a second motor and There are at least two driven teeth on the outer periphery of the drive gear and the receiving ring. The finger vein recognition device with a strong recognition ability can adjust the angle of the adjustment plate through the adjustment mechanism, so that the infrared light emitted by the transmitter and the finger remain fixed. Not only that, the receiving mechanism can receive enough infrared signals to generate clear vein images, thereby improving the recognition ability of the device.

Description

technical field [0001] The invention relates to the field of biological identification equipment, in particular to a finger vein identification device with an adjustment function and strong identification ability. Background technique [0002] Finger vein recognition is a new generation of biometric identification technology. Its main advantage is that veins are hidden inside the body and are not easy to be copied and stolen, and only living bodies have veins. Compared with traditional identification technologies such as fingerprints, its security performance is higher, and it has great application prospects in security access control, credit card verification, medical identification, criminal identification and file management. The finger vein image acquisition is based on the mechanism that part of the near-infrared rays are absorbed by hemoglobin when the near-infrared rays pass through the finger, so as to realize the display of the finger vein image. [0003] Finger ve...

AI Technical Summary

Problems solved by technology

[0003] Finger vein recognition is a non-contact biometric technology. In practical applications, due to the fixed position of the internal near-infrared emitter, there are different angle deviations in the recognition process of the finger, resulting in the existence of an angle between the near-infrared ray and the finger. Deviation, therefore, when the finger is placed at different angles, it will cause the vein imaging to be different each time, which will reduce the recognition ability of the device. Not only that, but in the recognition process, when the near-infrared ray hits the surface of the finger, there will be transmission, Diffuse reflection will also occur, and the angles of each projection and diffuse reflection are different. When using a fixed-position infrared sensor to receive near-infrared rays, the received signal will be weak each time, which is not enough to extract the characteristic data of finger veins, resulting in The recognition ability of some finger vein recognition devices is reduced

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