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Identification and input device for hand-written signature based on ultrasonic and infrared

An input device and handwritten signature technology, applied in character and pattern recognition, signal transmission system, non-electrical signal transmission system, etc., can solve the problems of few sampling points, difficult recognition, low signature extraction accuracy, etc., to improve the accuracy of recognition , high precision, and the effect of compensating system errors

Inactive Publication Date: 2009-05-27
UNKNOWN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] To sum up, most of the signature input devices of the existing signature recognition systems use handwriting tablets or similar devices. The main disadvantage of the signature input equipment using the above technology is: the extraction accuracy of the handwriting board to the signature is low, which cannot be well reflected. Authentic signatures, especially in the case of small signatures, have few sampling points, making identification difficult
Nor does it provide information on stress during writing

Method used

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  • Identification and input device for hand-written signature based on ultrasonic and infrared
  • Identification and input device for hand-written signature based on ultrasonic and infrared
  • Identification and input device for hand-written signature based on ultrasonic and infrared

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] like figure 1 , the present invention includes:

[0039] Signal transmitting pen 2, writing board surface 1 and signal receiving processor 3, wherein,

[0040] like figure 2 Shown:

[0041] Comprise battery 21, common writing refill 27, membrane switch 22, circuit board 23, force sensor 24, infrared emission sensor 25 and ultrasonic emission sensor 26 in the signal transmitting pen 2, membrane switch 22 is connected with force sensor 24, and this force sensor is connected with force sensor 24. The circuit board 23 is connected.

[0042] The circuit board 23 includes: an inclination sensor 231, a differential amplifier one 232, a differential amplifier two 234, a microprocessor 235, an infrared drive circuit 236 and an ultrasonic drive circuit 237, the inclination sensor 231 is connected to the differential amplifier one 232, and the front end of the differential amplifier two 234 Relay sensor 24.

[0043] like image 3 Shown, the program flow of the microprocesso...

Embodiment 2

[0073] In the ultrasonic drive circuit 237 in Embodiment 1, the center frequency of the resonant amplifier used is 180 Hz, and the center frequency adjustment element is a variable inductor.

Embodiment 3

[0075] In the ultrasonic drive circuit 237 in Embodiment 1, the center frequency of the resonant amplifier used is 280 Hz, and the center frequency adjustment element is a variable inductor.

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Abstract

The invention relates to the hand-written signature identification input equipment based on the ultrasound and the infrared waves. It is composed of the signal transmitting pencil 2, the writing plate 1 and the signal receiving processor 3. The signal transmitting pencil is composed of the force sensor connected to the circuit board and the thin-film switch connected to the sensor. The slope angle sensor is included in the circuit. And the signal receiving processor 3 is composed of the left signal receiving amplifier, the right signal-receiving amplifier and the signal processor. The force sensor and the slope angel sensor are added to the transmitting apparatus of the ultrasound infrared location system as the input equipment, which may reflect the writing trace and the writing habit accurately. Moreover, it can compensate the system error generated by pencil tilting while writing to improve the identification accurateness of the system.

Description

technical field [0001] The invention relates to a handwritten signature and identification input device. Background technique [0002] Handwritten signature and recognition systems are a type of biometric authentication. It is widely used in the identity authentication of users accessing networks, personal computers and other occasions. The handwritten signature and recognition system has made a very important contribution to the security of the computer. Compared with the security mechanism of the user password or mechanical key, it has the characteristics that it cannot be leaked or stolen. The handwritten signature and recognition system extracts the physiological behavior of the individual, which provides a reliable basis for the identification of the user's true identity. [0003] Today, despite the availability of computerized documents, paper documents are still relied upon where there is a legal requirement for documents because the law requires the original handwr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K11/06G06K9/46G08C23/00
Inventor 王树勋
Owner UNKNOWN