Integrated phase control array fingerprint sensor

Abstract

The invention discloses an integrated phase control array fingerprint sensor. The sensor includes a circuit board provided with a microcontroller, a phase control array transceiving module used for fingerprint recognition, a gyroscope, an acceleration sensor, an analog matrix switch used for signal switching, an A / D conversion module and a power source module used for power supply. The phase control array transceiving module, the gyroscope and the acceleration sensor are connected with the input terminal of the A / D conversion module through the analog matrix switch. The output terminal of the A / D conversion module is electrically connected with the microcontroller. According to the invention, phase control array principle is applied to fingerprint recognition, so that recognition rate and accuracy are improved. The gyroscope and the acceleration sensor are integrated to the phase control array fingerprint sensor in an integral design, so that the structure is simple and the size is small and influence on sensor signals by the external environment is reduced and the stability of the sensor is improved. The invention solves problems of high power consumption and incapability of waking and mobile alarm of a single fingerprint sensor.

Description

technical field [0001] The invention relates to sensor technology, in particular to an integrated phased array fingerprint sensor. Background technique [0002] The fingerprint sensor is the key device to realize the automatic collection of fingerprints. Due to the uniqueness and portability of fingerprints, fingerprint sensors have been widely used in the fields of identity information authentication and identification such as financial payment, security facilities, and attendance systems. [0003] Traditional fingerprint recognition methods include optical recognition and capacitive recognition. Among them, the defect of the capacitive recognition method is that the recognition rate for dirty fingers and wet fingers is low. The current relatively advanced fingerprint identification technology is radio frequency fingerprint identification technology, but the frequency and phase of the radio frequency signal used are single, so its detection depth and dimension are limited...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention provides an integrated phased array fingerprint sensor with high fingerprint recognition rate and accuracy and can solve the problems of high power consumption, inability to wake up and motion alarm of a single sensor.

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