DE9203286U1 - Handwriting examiner - Google Patents

Description

R. BALTUa ₁ BCHULBTR. 46,3303 BORNHIIM.; ti. &Ngr;*&iacgr;&Igr;&Zgr; 1992. '*..." Page 3

DESCRIPTION

Very i -F t pr üf er.

STATE OF THE ART

Handwriting checkers are well known. They are used, for example, in the banking sector to check signatures on checks, transfer forms and other documents. These handwriting checkers work with optical systems. The check can only be carried out after the signature has already been made and the form has been manually or automatically placed in a separate device. An immediate comparison of the previous handwriting with the current handwriting is not possible. The check is carried out in two dimensions: the length and width of the entire signature and the individual lines, as well as the ratio of height to width of the individual lines and letters to one another.

RROBLEM=

The invention specified in claim 1 is based on the problem of making the person-specific and unchangeable components of writing, the force and pressure curves that arise during writing, three-dimensionally recordable, testable and immediately evaluable.

^INVENTION _

This problem is solved with the measures of claim 1 in that a plate is mounted on load cells or force transducers or is provided with strain gauges in such a way that the three-dimensional force and pressure curves generated during writing can be converted by the load cells, force transducers or strain gauges into evaluable electrical signals.

The signals can be transferred to data storage devices via downstream electronics and can be compared when used again. If the current signals match the stored ones, further functions can be triggered; if this is not the case, functions can be blocked.

R. BALTUS ₁ SCHULBTR. 40,3303 BORNHE: H,-· 13. H*R3 1<&Ggr;?2. - . ■ Page 4

EXECUTION EXAMPLES

The examples I to III illustrate the function of the writing tester. In the first example, the plate (1) is supported on three load cell force sensors (2). These stand on a solid base (6). If pressure is exerted on the plate (1) from different directions (8), this acts with different intensities on the load cell force sensors (2). The resulting force and pressure proportional electrical signals are sent via the cable connections (11) to the electronics for further processing.

The plate (1) is embedded in a cover (3) and can move freely in all directions. The cover (3) has two recesses (4) that hold the hand in place when writing. The writing test (9) is therefore taken approximately in the middle of the plate (1).

The embodiment II shows the screen (5) built into the support frame (7). Three load cell force sensors (2) are arranged below the support frame (7). These in turn stand on the fixed base (6). The whole thing can be provided with a cover (3) as in example I.

The embodiment III shows the plate (1) to whose underside 6 strain gauges (10) are glued. The plate (1) is placed on supports (12). The force and pressure curves (8) that occur during writing bend the plate (1). These bendings are converted into proportional electrical signals in the strain gauges and processed in an evaluation electronics.

ft. BALTUa ₁ BCHULBTR. 48,3303 BORNHElM, I?. MÄRT 1&Ggr;92. r, .", . - Page

REFERENCE NUMBER CHEIML I SXE

1 plate

2 load cells 1 force sensor

3 -fixed cover

4 recesses

5 Screen

h -solid base

7 Support frame

8 Pressure curves

9 Font sample

10 strain gauges

11 Cable connection

Claims (8)

R. BALTUS, SCHULBTR. 4S.33O3 BORNfi^IM^ Xg.. HItKf. l)»92. ;.. * &iacgr; ', '-. Page 1 Claims for protection 1. Writing tester, characterized in that a plate (1) or a screen (5) is mounted on several, preferably three or six, load cell force sensors (2), that the plate (1) or the support frame (7) is equipped with strain gauges (10) and that the person-specific, unchangeable, three-dimensional force and pressure curves (8) that arise when writing on the plate (1) or on the screen (5) can be dynamically recorded by the load cell force sensors (2) or the strain gauges (10), converted into an electrical signal and evaluated in an electronic circuit. 2. Handwriting checker according to claim 1, characterized in that indicates that the plate (1) or the screen (5) is embedded in a fixed cover (3) and that the plate (1) and the screen (5) with the support frame (7) are freely movable. 3. Handwriting checker according to claim 1 and 2, characterized characterized in that recesses (4) are recessed in the fixed frame. 4. Handwriting examiner, according to one or more of the claims to 3, characterized in that forces occurring at specific points can be evaluated in an electronic circuit. 5. Handwriting examiner, according to one or more of the claims to 4, characterized in that the evaluated signals of the force and pressure curves are stored in an electronic circuit and can be transferred to a data carrier, for example a magnetic strip. R.BALTUS,OCHULSTR.«8,3303 BORNHrIM ₄ ta. H*(LZ 1092.; - - Page 2 6. Handwriting checker according to one or more of claims 1 to 5, characterized in that the data stored on the data carrier, for example on a magnetic strip, and read with a data reader, e.g. a magnetic strip reader, are immediately comparable with the force and pressure curves that arise during writing and are evaluated in an electronic circuit. 7. Handwriting checker according to one or more of claims 1 to 6, characterized in that if the evaluated force and pressure curves and the data stored on the data carrier match, further functions can be triggered. 8. Handwriting checker according to one or more of claims 1 to 7, characterized in that if the evaluated force and pressure curves and the data stored on the data carrier do not match, further functions can be blocked.