Finger vein recognition device with adjusting function and strong recognition capability

Abstract

The present invention relates to a finger vein recognition device with an adjusting function and the strong recognition capability. The finger vein recognition device comprises a shell, the shell is equipped with the jacks, and a frame, an adjusting plate, a supporting mechanism, an adjusting mechanism, an induction mechanism and an emission mechanism are arranged in the shell. The adjusting mechanism comprises a first motor, a buffer block, a first driving shaft, a sliding block, a supporting rod and a hinging block, a receiving mechanism comprises a receiving ring, four driving assemblies and at least two infrared receivers, each driving assembly comprises a connecting rod, a second motor and a driving gear, and at least two driven teeth are arranged at the periphery of the receiving ring. According to the finger vein recognition device with the adjusting function and the strong recognition, the adjusting mechanism adjusts the angle of the adjusting plate, so that the infrared lightemitted out by an emitter keep the fixed angles with the fingers, and the accurate vein images are obtained conveniently. Moreover, the receiving mechanism can receive the enough infrared signals, sothat the clear vein images are generated conveniently, and further the recognition capability of the device is improved.

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

Images