阅读说明：本技术 在评估电子设备与缸系统中的探头之间的连接结构装置 (Connection structure device between evaluation electronics and probe in cylinder system ) 是由 A·吉雷 S·吕蒂希 S·曼 M·沃尔夫 于 2019-07-30 设计创作，主要内容包括：本发明说明了一种用于在缸系统的缸盖内引导电磁波的装置,其中,该装置具有在缸盖中或在其处布置的评估电子设备；和位于缸盖中的探头；以及引导电磁波的、在评估电子设备与探头之间用于灵活地定位评估电子设备布置的连接结构,其中,该连接结构具有用于联接到探头处的第一信号接头(101,201,301,401,501a,501b,601,701)和用于联接在评估电子设备处的第二信号接头(314,514a,514b,714)。(The invention relates to a device for guiding electromagnetic waves in a cylinder head of a cylinder system, wherein the device has evaluation electronics arranged in or at the cylinder head; and a probe located in the cylinder head; and a connection structure for guiding electromagnetic waves between the evaluation electronics and the probe for flexibly positioning the arrangement of the evaluation electronics, wherein the connection structure has a first signal connection (101,201,301,401,501a,501b,601,701) for coupling to the probe and a second signal connection (314,514a,514b,714) for coupling to the evaluation electronics.)

1. An arrangement for guiding electromagnetic waves in a cylinder head of a cylinder system, wherein the arrangement has:

-evaluation electronics arranged in or at the cylinder head; and

-a probe in said head; and

-a connection structure between the evaluation electronics and the probe for flexible positioning of the evaluation electronics arrangement guiding the electromagnetic waves, wherein the connection structure has a first signal connection (101,201,301,401,501a,501b,601,701) for coupling at the probe and a second signal connection (314,514a,514b,714) for coupling at the evaluation electronics.

2. The device according to claim 1, wherein the connecting structure is configured flexibly, preferably partially flexibly.

3. The device of claim 1, wherein the connecting structure is rigidly configured.

4. The apparatus of any one of claims 1 to 3, wherein a coaxial connection is used to transmit the electromagnetic waves.

5. The device according to any of claims 1 to 4, wherein any angle can be achieved between the first signal connector (101,201,301,401,501a,501b,601,701) and the second signal connector (314,514a,514b, 714).

6. The device according to claims 1 to 5, wherein the first signal connector (101,201,301,401,501a,501b,601,701) and/or the second signal connector (314,514a,514b,714) are provided on a circuit card (104,404).

7. The device according to claims 1 to 6, wherein the first signal connector (101,201,301,401,501a,501b,601,701) and/or the second signal connector (314,514a,514b,714) are configured as coaxial connections, preferably in any wire type on a circuit card (104,404).

8. The device according to claims 1 to 7, wherein a strip conductor, preferably a microstrip conductor, is provided.

9. The device according to any one of claims 1 to 8, wherein galvanic contact is provided between the first signal connector (101,201,301,401,501a,501b,601,701) and the second signal connector (314,514a,514b, 714).

10. The device according to claim 9, wherein the galvanic contact is realized in the form of an element with elastic action.

11. The device according to claim 10, wherein the spring action of the galvanic connection is achieved in the form of a spring contact or by applying a conductive elastomer or a conductive film-on-film foam contact.

12. Device according to claim 9, wherein the galvanic contact is realized in the form of a plug-or clip connection, preferably in the form of a spring lathe (515a,515b, 615).

13. The device according to claim 9, wherein the galvanic contact is realized in the form of a screw-or press connection.

14. The device of claim 13, wherein the screw or press connection is achieved in the form of:

-a tight fit; or

Press-fitting, preferably in the case of the use of conductive elastomers or preferably laminating foam contacts with conductive films.

15. The device of claim 9, wherein the galvanic contact is realized in the form of a welded connection.

16. The device according to any of claims 1 to 15, wherein the first signal connection (101,201,301,401,501a,501b,601,701) and/or the second signal connection (314,514a,514b,714) establish galvanic isolation, wherein preferably a coupling structure is applied, preferably in the form of parallel-guided signal wires.

17. The apparatus of claim 16, wherein the galvanic isolation is implemented between the first signal connector (101,201,301,401,501a,501b,601,701) and the evaluation electronics.

18. The apparatus of claim 16, wherein a directional coupler is integrated into the signal conductor.

19. The device according to one of claims 1 to 18, wherein a correction structure is provided and/or can be integrated into the signal line.

20. The device according to any one of claims 1 to 19, wherein an analog or digital temperature sensor (106) is provided for monitoring the temperature at the location of the connection structure.

21. The apparatus according to any one of claims 1 to 20, wherein the electromagnetic waves have a frequency of 10MHz to 100 GHz; and wherein the electromagnetic waves preferably have a frequency of 100MHz to 25 GHz; and wherein the electromagnetic wave particularly preferably has a frequency of 500MHz to 6 GHz.

Technical Field

The invention relates to a device for detecting the position of a reflector in a cylinder system according to the features of claim 1.

Background

Different systems are currently used for detecting the piston position of a linear drive with a pneumatic or hydraulic cylinder. In this case, the detection of the piston position can take place discretely, i.e. at discrete points, and continuously, i.e. continuously during operation.

In order to detect discrete positions, for example the final position, magnetoresistive sensors are mainly used, which are based on an evaluation of the permanent magnet providing the position and therefore have a high sensitivity to external disturbances and a high sensitivity to electromagnetic disturbances, in particular external magnetic fields. Furthermore, the installation of such sensor devices has to be carried out outside the cylinder (Zylinderrohr), and is therefore less resistant to environmental influences and external effects and requires additional installation space. The device according to the application is in the category of a sensor system, for example, which measures the distance between a probe and a reflective target in a waveguide structure (welleleiterstruktur).

Instead, for continuous detection of the piston position, various measuring principles are used. In addition to potentiometric, magnetostrictive and inductive sensors based on the LVDT principle (linear variable differential transformer), contactless sensors based on the ultrasonic or radar principle have also been used for some time. Document EP 1040316 describes such a device based on the radar principle. The technical advantage of such radar-based sensors results primarily from the fact that no changes are required to the various associated mechanical components, such as the piston, the final position damping (endrodamampfang) or the piston rod. The same applies to ultrasonic sensors, which are, however, only limitedly suitable for displacement measurement in pneumatic and hydraulic cylinders, since the properties of the dielectric and thus the measurement accuracy vary strongly with the cylinder pressure and the temperature of the medium. Further causes for variations in the dielectric properties of the medium in the guide structure (leitsurstuktur) may be, in particular, contamination in the medium, gas bubbles, water or exchange of the medium. Although the environmental properties of the medium and impurities usually also influence the wave propagation in the centimeter and millimeter wave range, the disadvantages present can be compensated here by means of suitable measures. For example, DE 102013018808 a1 describes a cylinder sensor with a sensor structure in the form of a transmission or reflection probe for reference measurement of the propagation medium in the cylinder, which sensor structure detects the necessary parameters for correcting the distance value. Furthermore, there is the additional possibility of determining the environmental characteristic from the measurement signal and compensating accordingly. The assembly of the radar sensing device is usually done at the end in the cylinder head (Zylinderkopf). Here, the evaluation electronics (ausputelektronik) can be integrated in the cover or mounted externally via a TEM wire connection in the form of a coaxial wire (Koaxialleitung). The latter has proven problematic in practice, since environmental influences negatively affect the properties of the coaxial line and the external electronics cannot be placed anyway. Furthermore, the use of external evaluation electronics leads to an increased complexity of the system, wherein, however, temperature effects and higher dispersion due to increased wire lengths lead to malfunctions in the system when not noticed.

Not only continuous but also discrete piston position determination cannot or can only be integrated into the cylinder with great structural expenditure and the associated high costs. The reason for the great construction effort is that all the generic sensor principles described have to be adapted to the respective cylinder length, since they have a too short detection range. It is therefore presently preferred to use the microwave-based contactless sensor principle with internal electronics. A significant disadvantage of the sensor arrangement with internal electronics is the additionally required installation space, which makes an undesirably long cylinder length (Ueberlaenge) noticeable.

Disclosure of Invention

The object of the invention is to avoid or to improve the disadvantages of the prior art in such a way that the integration capability of the electronics and the probe is improved and a greater freedom in evaluating the positioning of the electronics is achieved.

This object is achieved in terms of the device by the features according to claim 1.

The invention relates to a device according to claim 1 for guiding electromagnetic waves in a cylinder head of a cylinder system, wherein the device has evaluation electronics arranged in or at the cylinder head and a probe located in the cylinder head and a connection structure for guiding electromagnetic waves between the evaluation electronics and the probe for flexibly positioning the evaluation electronics arrangement, wherein the connection structure has a first signal connection for coupling to the probe and a second signal connection for coupling to the evaluation electronics.

In principle, the invention enables not only the use of evaluation electronics integrated in the cylinder head, but also the utilization of external evaluation electronics. The invention does this by transmitting electromagnetic waves with low losses, against mechanical and electrical influences, over the connecting path between the evaluation electronics and the probe.

In principle, the probe acts as a low-loss waveguide junction (Wellenleiter ü bergang) which converts high-frequency signals into a mode which can propagate in a cylindrical cavity and/or vice versa. The probe is either used directly as a sensing member or is used for bi-directional/unidirectional transmission and/or reception of electromagnetic waves in order to deduce properties of the measuring environment, in particular the piston position. The probe enables excitation and reception of a specific mode in the waveguide, the propagation capacity of which in turn depends, inter alia, on the frequency, geometry and environmental conditions of the high-frequency signal, in particular the diameter of the cylindrical hollow body and, in particular in the case of hydraulic cylinder systems, on the dielectric properties of the medium located in the hollow body. Thus, the probe allows to evaluate the cylinder characteristics, in particular the piston position, and either to evaluate the medium located in the cylinder, or both.

Furthermore, the flexible positioning of the evaluation electronics allows for a mechanical and/or spatial decoupling of the probe and the evaluation electronics, which is particularly beneficial with regard to stability with respect to mechanical tolerances and temperature dependencies. In addition, the evaluation of the individual and uncomplicated replaceability of the electronics results in a competitive advantage over other sensor systems and the flexible positioning of the electronics reduces the installation space required for this in the cylinder system.

Further advantageous embodiments of the invention are the subject matter of the dependent claims.

Advantageously, the connection structure is constructed flexibly or preferably partially flexibly according to claim 2 in order to simplify assembly and disassembly and in order to minimize temperature effects if necessary. According to claim 3, the connection structure is rigidly constructed in order to achieve a fixed positioning of the evaluation electronics. According to claim 4, advantageously a coaxial connection is used for transmitting electric waves, wherein the coaxial connection enables a flexible application in cylinder systems and prevents interfering radiation due to its mechanical stability. The wall of the bore provided for this connection in the cylinder head can be used as the outer conductor of the coaxial line. The connections of the probe and the evaluation electronics are preferably not realized exclusively in the form of TEM lines. According to claim 5, an arbitrary angle is achieved between the first and second signal connections. This allows all degrees of freedom in the mechanical design of the cylinder system. The angle between the first and second signal connections is preferably 90 degrees.

According to claims 6 and 7, this embodiment can also exist as a hybrid of different conductor structures in order to achieve a minimization of the connection points between the components and thus an optimal utilization of the installation space. As such, a combination of coaxial and ribbon wire types, for example, on a circuit card (Leiterkarte) may prove particularly advantageous for mechanically decoupling the probe from the evaluation electronics. Especially when implemented on circuit cards, it is not usually object to use other conductor types that do not necessarily have a TEM field type to implement the connection. Advantageously, according to claim 8, a ribbon wire (Streifenleitung) and preferably a microstrip wire (MSL) is used, wherein it is particularly suitable for internal operation in a cylinder system and preferably for short distances. In principle, alternative strip conductor technologies can also be used, for example a grounded coplanar waveguide (gCPW) like MSL.

Advantageously, according to claim 9, a galvanic contact (galvanosche Kontaktierung) can be made between the first and second signal connections, wherein the galvanic contact of the connection can be realized in different patterns depending on the boundary conditions present. According to claims 10 to 15, the following contact patterns are conceivable for establishing galvanic contact between the probe and the signal connection of the evaluation electronics:

an element with a spring action in the form of a spring contact (Federkontakt),

-a plug-or clip-connection,

-screw-or press-connection and

-a welded connection, the welded connection,

among these, the spring contact has the highest flexibility and the screw connection, the press connection and the solder connection can be regarded as mechanically rigid in the opposite sense.

Preferably according to claim 10, the galvanic contact can be realized in the form of an element with a spring action. The contact between the probe and the evaluation electronics using the spring contact can be realized in a coaxial system, for example, with a so-called spring contact pin (which is formed by a sleeve with a spring and a contact pin), wherein the spring contact is particularly advantageous in the case of high forces and mechanical tensions. On the circuit card, this realization is done by means of a bent plate piece (blechbieeteeil) with a spring action or with contact pins suitable for the equipment. In addition to the installation tolerances during manufacture, such contacts also allow axial and radial movement of the signal conductors from the probe, in particular from its inner conductor, during operation. This can prove to be advantageous, in particular, if high forces are present in the high-pressure system, since it is known that the inner conductor is displaced relative to the cylinder head as a function of the pressure. Mechanical wear of the contact points can thus be counteracted by means of the movable contact. An alternative way to realize a contact with spring action is according to claim 11 a conductive elastomer or foam coated with a conductive film. When assembled under prestress, it follows the movement of the movable contact, wherein a high mechanical strength and elasticity of the connection structure is achieved.

According to claim 12, the plug-or clip connection allows tolerances in the installation, but is regarded as less flexible in operation and is subject to wear in operation, in particular due to wear of the contact surfaces. However, installation tolerances and occurring deviations between the individual components can be compensated for. Furthermore, these connection types have good temperature resistance. According to claims 13 and 14, a mechanically rigid connection between the electronic circuit and the probe can be achieved by using screw-and press-connections in the form of a tight fit (Passung) and a press fit (Pressung), which enables simple assembly and disassembly. According to claim 14, preferably a press fit is applied in case a conductive elastomer is used, or a welded connection is applied according to claim 15. Such connections can be severely worn or irreversibly broken in the presence of high forces and mechanical tensions, for example due to temperature gradients of the materials involved. Therefore, spring contacts are particularly preferred when high forces and strong temperature gradients occur.

By using a flexible connection in the form of a spring contact, a high insensitivity with respect to tolerances occurring in the axial and radial directions of the cylinder and with respect to manufacturing tolerances occurring in production can be achieved. In this case, not only the contact and mounting points in the cylinder head are taken into account, but also the influence on the connecting element itself is taken into account. For example, the specifically selected conductor technology exhibits a higher insensitivity with respect to drilling tolerances. By evaluating this connection of the electronics and the probe, an integrated design can be achieved to balance tolerances such as axial, radial and manufacturing tolerances of the contact-and assembly sites. Furthermore, the integrated design allows for coarser tolerances in the production of the mechanical components. When the design is implemented such that, for example, the assembly sequence of the probe and the evaluation electronics can be freely set, further advantages of an integrated design are obtained. This also positively affects the replaceability of the individual components. By evaluating the individual and uncomplicated exchangeability of the electronic device, a competitive advantage can be created, for example, with respect to other sensor systems. If the integrated design makes possible an impedance transformation between the evaluation electronics and the probe, this in turn can contribute to the size of the sensor system. Although electronic devices are often based on a wire wave impedance of 50 ohms (leitsunselen wave), the base point impedance of the probe (Fu beta punktimepodaz) is almost freely selectable. The installation space required for the sensor can therefore be significantly reduced by moving the impedance transformation stage from the probe to the input line (Zuleitung).

In addition to galvanic connections, galvanically isolated signal connections are used according to claim 16 for connecting the evaluation electronics and the probe to reduce interference signals and to enable delay-free signal transmission. According to claim 18, such a connection exists if, for example, a coupler (Koppler) for isolating the transmit and receive signals is integrated into the connection. The coupler can be embodied here not only as a conductive structure or integrated on the circuit board in the form of discrete structural elements with galvanic isolation. According to claim 17, galvanic isolation is expediently implemented between the first signal connection and the evaluation electronics, and is effected there by using parallel-guided lines.

By providing additional functionality in the connection between the evaluation electronics and the probe, the device can avoid temperature undershoots and higher dispersion with increased wire length. According to claim 19, mention may be made here of a calibration structure accessible or integrated in the signal connector, which, in combination with suitable methods, allows to eliminate the characteristics of the electronic circuits and connections up to the calibration plane (Kalibrationsebene). According to claim 20, the temperature course (temperature course) of the connection between the probe and the evaluation electronics can furthermore be monitored by using one or more analog or digital temperature sensors in order to compensate for this temperature course during signal evaluation by means of suitable methods.

According to claim 21, electromagnetic waves in the high frequency range between 10MHz and 100GHz are fed in. Depending on the size or dimensions of the cylinder used as the conducting structure and the wave mode (Wellenmode), a suitable frequency is selected which is higher than the lower limit frequency of the wave mode used. The use of a plurality of frequencies enables a higher accuracy to be achieved, since irrelevant measurement errors can be compensated.

Drawings

Further advantages, features and possibilities of use of the invention emerge from the following description of a preferred embodiment with reference to the accompanying drawings. Wherein:

fig. 1A shows a cylinder system with external evaluation electronics in a generalized form in a schematic sectional view.

Fig. 1B shows a cylinder system with internal evaluation electronics in a generalized form in a schematic sectional view.

Fig. 2 shows, in perspective view, an embodiment of a connection structure according to the application with a 90-degree connection between a coaxial line leading to the probe and a microstrip line leading to the evaluation electronics in the case of a spring contact plate applied to the circuit card.

Fig. 3 shows a sectional view of an embodiment of the connection according to the application with a connection between two coaxial lines using a spring contact pin.

Fig. 4 shows a sectional view of an embodiment of the connection according to the application with a straight connection between two coaxial lines using a spring contact pin.

Fig. 5 shows, in a perspective view, an embodiment of a connection structure according to the application with a screw-type press connection between a coaxial line from the probe and a microstrip line with a circuit card leading to the evaluation electronics.

Fig. 6A shows an embodiment of the connection according to the application in a perspective view with an L-shaped connection between two coaxial lines using a clamping connection with a spring-lathe (Feder-Drehteil).

Fig. 6B shows the embodiment according to fig. 6A in a sectional view.

Fig. 7 shows an embodiment of the connection according to the application in a sectional view with an L-shaped connection between two coaxial lines with the application of a clamping connection.

Fig. 8 shows a section through an embodiment of the connection according to the present application with a straight connection between two coaxial lines using a plug contact pressed on the inner conductor and a press connection on the outer conductor.

Detailed Description

Fig. 1A schematically shows a sectional view of a cylinder system with a device according to the application, in which the evaluation electronics (22a) of the sensor system are arranged externally. In an external embodiment, the connection between the probe (21a) and the evaluation electronics (22a) is realized by drilling or milling in the cylinder wall of the cylinder head (24 a). Preferably using a coaxial connection for transmitting electromagnetic waves.

Fig. 1B shows schematically a sectional view of a cylinder system with a device according to the application, in which evaluation electronics (22a) of the sensor system are arranged inside. In an internal embodiment, the evaluation electronics (22b) is preferably arranged in a recess in the cylinder head (24b) of the cylinder system in the vicinity of the probe (2 lb). Short coaxial lines are preferably used for connecting the evaluation electronics (22 b).

Fig. 2 shows a perspective view of an embodiment of the connection arrangement according to the application, in which a 90-degree connection is made between a coaxial signal connection (101) leading to the probe and a signal connection leading to the evaluation electronics. The signal connection leading to the evaluation electronics is a microstrip line, preferably of the grounded coplanar waveguide (gCPW) type, which is guided in a borehole. The galvanic contact is realized by means of one or more elastic contact plates (103), which may be made of copper-beryllium or other conductive material with corresponding elastic properties, for example. A copper contact plate (103) is arranged in the signal path of the microstrip line (105). In the signal path, particular attention should be paid to the current distribution at the contact points and the inductive influence of the spring contact plate (103) during the design. The application of a dedicated network for impedance matching, preferably in the circuit card (104) and/or in the coaxial system, may prove expedient, but not compulsory, in the correct design of the spring contact plate (103). Furthermore, one or more analog and/or digital temperature sensors (106) are arranged on the circuit card (104), which monitor the temperature course of the connection between the probe and the evaluation electronics in order to compensate for this temperature course during signal evaluation by means of a suitable method.

Fig. 3 shows a sectional view of an embodiment of the connection according to the application, in which an L-shaped connection is realized between the two signal connections. The first and second signal contacts are correspondingly coaxial connections, wherein a spring contact pin (208) is used as a mechanically flexible connecting element in order to create a coaxial, angled system.

Fig. 4 likewise shows a sectional view of an embodiment of the connection according to the application, in which a straight connection is made between the two signal connections (301,314). As in fig. 3, the first and second signal connections (301,314) in fig. 4 are each coaxial connections, wherein the spring contact pin (308) is used as a mechanically flexible connecting element.

Fig. 3 and 4 show spring contacts as mechanically flexible connecting elements in straight and angled coaxial systems. The outer conductor (202,302) of the coaxial line is formed by the wall of a bore (211) in the cylinder head in both illustrations. The inner conductor of the line to the probe (201,301) or to the electronics (314) is realized in the illustration using a spring contact pin (208,308), which is mounted in a spring-loaded manner in the sleeve (210, 310). The spring (209,309) generates a pressure force in the axial direction towards the contact point. The dielectric sleeve (210,310) ensures the mechanical stability of the contact system in the radial direction and also serves for impedance matching of the sudden diameter changes (Durchmessersprung) that occur.

In addition to a partially or completely flexible connection, a rigid connection in the form of a screw or press connection, a close fit or also a soldered connection can also be used as a joint between the evaluation electronics and the probe.

Fig. 5 shows in a perspective view an embodiment of a connection structure according to the application with a screw-type press connection between a coaxial line (401) from the probe and a microstrip line (405) with a circuit card leading to the evaluation electronics. A rigid press connection is shown, wherein the electrical contact of the outer conductor and the inner conductor of the coaxial line is produced by a press connection on a printed circuit board, and wherein the pressing force is applied by a screw (413) that is screwed with a defined torque.

Fig. 6A and 6B show in perspective view or in section a likewise flexible, galvanic connection with a plug-or clip connection in coaxial fashion. The connection of the inner conductors of the coaxial lines (501a,501b) leading to the probe and the connections of the electronics (514a,514b) is effected by means of elastic rotary elements (515a,515b) made of brass or copper-beryllium, for example, or by means of bent plate elements, which are attached to one of the two inner conductors, for example by means of gluing or welding. The spring-loaded lathing parts (515a,515b) are formed separately from one another in the axial direction, so that the grooves have a spring effect in order to enable the insertion of the mating part on the one hand and to ensure a secure fastening in the snapped-in state on the other hand. In order to meet the requirements of the transmission path, the spring lathe (515a,515b) must be designed both mechanically and electrically. In particular, the choice of material and the shape (which allows direct current flow in the axial direction) prove to be important for the high-frequency properties of the connection. Furthermore, in the design of the spring-mounted lathe parts (515a,515b) with a soldered and clamped connection, a low parasitic capacitance between the lathe parts (515a,515b) and the cylinder walls (502a,502b) serving as outer conductors should also be noted.

Fig. 7 shows a sectional view of an embodiment of a connection according to the application with a press connection in a coaxial system. Coaxial conductors from the probe and the evaluation electronics are at right angles to each other and the walls of the bore (611) in the cylinder head form the outer conductor (602) of the connection. The press-contact is effected in a preferred direction (Vorzugsrichtung) by means of a dielectric clamping wedge (616) which defines a flexible inner conductor from the electronic device and presses onto a rigid inner conductor, which establishes a connection to the probe.

Fig. 8 shows a sectional view of an embodiment of a connection according to the present application with a straight connection of two coaxial lines, wherein the connection of the inner conductor is effected by means of a pressed-in contact element (718) and the outer conductor is electrically connected via a press-fit connection (719).

Further, a cylinder system with external electronics is generally depicted in fig. 1A (above). FIG. 1B (below) depicts a cylinder system with internal electronics. Fig. 2 depicts the evaluation of the connection of the electronic device and the probe in the case of a circuit card with a spring plate. Fig. 3 depicts an L-shaped connection of the evaluation electronics and the probe head in the case of a coaxial conductor with a spring contact pin. Fig. 4 depicts the evaluation of a straight connection of the electronics and the probe head with the application of a spring contact pin and a coaxial conductor. Fig. 5 depicts the evaluation of the connection of the electronic device and the probe in the case of a screw-type press connection with circuit card and coaxial wire. Fig. 6A (above) depicts in perspective view an L-shaped connection of the evaluation electronics and the probe in a coaxial configuration, applying a clamping connection with elastic lathing. Fig. 6B (below) depicts in a sectional view an L-shaped connection of the evaluation electronics and the probe in a coaxial configuration, using a clamping connection with elastic turning. Fig. 7 depicts an L-shaped connection of the evaluation electronics and the probe head in case a clamping connection is applied. Fig. 8 depicts evaluating a straight connection of an electronic device and a probe with the application of a press-fit connection of a plug contact pressed in at the inner conductor and the outer conductor.