Patent ID: 11867666
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A measuring device (11) for detecting measuring signals during a movement of an indenter (41) on a surface of a specimen (14), the measuring signals used to determine: a surface profile, a hardness, and, a scratch resistance of the specimen, the measuring device (11) comprising:
a) a housing, and,
b) a control device (33) including a computer processor, computer memory, a user interface, and, input/output ports, and,
c) a measuring table receptacle (26) that clamps the specimen (14) and whose position relative to the housing is controlled by the control device, and,
d) a force-generation means (44) which is connected with an indenter (41) for generating a displacing movement of the indenter along a travel axis (48) of the indenter, the travel axis perpendicular to a surface of the specimen, and, the force-generation means is controlled by the control device and drives a penetrating movement of the indenter into the surface of the specimen, or, which positions the indenter on the surface of the specimen for scanning, and,
e) the force generation means comprises a drive device (45) and a magnetic transmission device, and,
f) the magnetic transmission device comprises a first magnetic pole (67) and a second magnetic pole (68), which are arranged at a distance to one another and which are oriented with the same poles to one other, and,
g) the first magnetic pole is connected with the drive device that drives a displacing movement of the first magnetic pole along the travel axis or parallel thereto, or along an axis perpendicular to the travel, and,
h) the second magnetic pole of the transmission device is connected to a first end of a transmission element, the second end of the transmission element, located opposite the first end, is connected to the indenter, and, wherein the transmission element is displaceably guided inside the housing along the travel axis, upon the displacing movement of the first magnetic pole by the drive device, and,
i) thereby the movement of the drive device is transmitted on to the indenter by means of a magnetic force of the magnetic transmission device and the control device is programmed to determine a force of the indenter acting on the surface of the specimen, and,
j) a first measuring means (78) for measuring a penetration depth of the indenter into the surface of the specimen or for measuring a displacing movement of the indenter along the travel axis during a scanning movement of the indenter across the surface of the specimen, the first measuring means comprising a first sensor element (77) attached to the indenter and a second sensor element included in an adjustment assembly (79), and, during a displacing movement of the indenter, the displacing movement is detected by the distance between the first and second sensor elements, and,
k) wherein the first sensor element is a ferrite ring and the second sensor element comprises a coil, or, the first sensor element is an optical encoder and the second sensor element is an optical detector and an electrical signal from the second sensor element is sent to the control device which is programmed to determine the distance between the first and second sensor element based upon the electrical signal from the second sensor, and,
l) wherein the transmission element is displaceably held in the housing by means of a guide connected to a holding device, and the guide comprises at least two leaf-spring elements (61, 62) spaced from one another, and, extending perpendicular from the transmission element to the holding device and which displaceably guides the transmission element along the travel axis, and, a second measuring means (91) comprising a second pair of sensor elements: a third sensor element (114) attached to an end of one of the at least two leaf-spring element connected to the holding device the indenter and a fourth sensor element fixed in the second measuring means (91), and, during a scanning movement of the indenter, a deflection movement of the indenter is detected by the distance between the third and fourth sensor elements, and,
m) wherein the third sensor element is a ferrite ring and the fourth sensor element comprises a coil, or, the third sensor element is an optical encoder and the fourth sensor element is an optical detector and an electrical signal from the fourth sensor element is sent to the control device which determines the distance between the third and the fourth sensor element, and,
n) a third measuring means (105) that measures a rotational movement of the drive device and thereby measures displacement of the first magnetic pole by the drive device, and,
o) electrical signals from the first, second and third measuring means are received by the control device, and, the control device is further programmed to determine at least one of: a surface profile, a hardness, and, a scratch resistance of the specimen based upon the electrical signals.