Connecting cable and measuring device formed therewith

Abstract

The connecting cable (1000) comprises a wire (1011) made of electrically conductive material, a wire (1012) made of electrically conductive material and a multiplicity of connecting elements (1013.1, 1013.2, 1013.3, 1013.N), serving for the mechanical, but nevertheless electrically insulated connection of the wires (1011, 1012) and each made of a material having a dielectric strength of no less than 300 V / mm and a transformation temperature of over 400°C. Each of the connecting elements (1013) is mechanically connected both to the wire (1011) and to the wire (1012) in such a way that the wires (1011, 1012) are spaced apart and electrically insulated from one another to form an electrical insulating resistance of no less than 1 MΩ. At least one (partial) segment of the wires (1011, 1012) extending between two adjacent connecting elements may also be advantageously formed in each case as a (bare) overhead line. The connecting cable (1000) may advantageously also be a component part of a measuring device and serve the purpose of electrically connecting an electrical component (101) of the measuring device (1), serving as a sensor element, and an electronic measuring circuit (102) of the measuring device (1) to one another.

Description

[0001] Connecting cable and measuring device formed thereby

[0002] The invention relates to a connecting cable and a measuring device with such a connecting cable.

[0003] From US-A 2015 / 0211902, US-A 2016 / 0123783, US-A 2016 / 0138952, US-A 2016 / 0313162, US-A 2018 / 0364075, US-A 2019 / 0094054, US-A 2020 / 0251265, US-A 2021 / 0140804 or US-A 48 76 898, measuring devices are known, each of which has at least one electrical component serving as a sensor element, for example resistive, capacitive, electrodynamic or piezoelectric, for example a (sensor) coil, a (measuring) capacitor or a piezo element or a (platinum) measuring resistor, for Converting at least one physical measurement variable into at least one electrical (measurement) signal with at least one signal parameter dependent on the measurement variable, in particular an electrical (signal) voltage and / or an electrical (signal) current, and an electronic measuring circuit for processing the at least one electrical (measurement) signal. Such as, among othersAs shown in US-A 2015 / 0211902, US-A 2016 / 0138952, US-A 2016 / 0313162, US-A 2018 / 0364075, US-A 2020 / 0251265, US-A 2021 / 0140804 and US-A 48 76 898, a 2- or multi-core connecting cable with a first core made of electrically conductive material and a second core made of electrically conductive material, typically identical to the first core, is used to electrically connect the electrical component or sensor element to the measuring circuit, wherein the first and second cores of the connecting cable, which consist of a metal, for example, are electrically connected to the electronic measuring circuit via a respective first (core) end and to the sensor element via a respective second (core) end. The component serving as the sensor element, the measuring circuit, and the connecting cable can also be arranged within a (protective) housing of the measuring system.

[0004] Each of the wires is, as shown in US-A 2016 / 0313162, US-A 2020 / 0251265 or US-A 48 76 898, typically also covered with a flexible (wire) insulation made of an electrically non-conductive or poorly conductive (insulating) material, such that the first and second wires are spaced apart from each other and electrically insulated, forming an electrical insulation resistance typically of more than 1 MQ (megaohm).Not least when using such measuring devices in (high-temperature) applications in which at least one component serving as a sensor element and the connecting cable connected to it are exposed to high operating temperatures of 350°C (degrees Celsius) or more, the insulating material typically used is a (high-)temperature-resistant, yet flexible plastic, for example based on polytetrafluoroethylene (PTFE) or a poly(organo)siloxane (silicone), and / or a (textile) fabric made from a (high-)temperature-resistant chemical fiber, for example a glass yarn, possibly also mixed with plastic and / or ceramic.

[0005] Despite the use of such (high-)temperature resistant (insulating) materials to form the (wire) insulation, temperature-related degeneration of the insulating material has occasionally been observed in measuring devices of the type in question, for example as a result of pyrolysis or oxidation.Although such changes to the insulating material do not necessarily lead to a reduction in the dielectric strength of the (wire) insulation to a value below a (dielectric strength) value corresponding to a (minimum) breakdown voltage specified for the respective measuring instrument, typically between 200 V (volts) and 500 V, the functionality of the respective measuring system can nevertheless be considerably reduced; this is particularly the case because the aforementioned changes to the insulating material can regularly result in irreversible, yet undesirable changes to its resistivity and / or permittivity, and thus in corresponding changes to the line impedance of the respective connecting cable and the associated distortions of the respective (measurement) signal.In addition, condensation of gas escaping from the insulating material at high temperatures on the component serving as a sensor element could occasionally be observed, accompanied by the formation of electrically conductive films, which occasionally also lead to ground or short circuits.

[0006] Based on the aforementioned prior art, it is an object of the invention to provide a connecting cable which has a permanently high stability both in terms of its mechanical and electrical properties, even at high operating temperatures of over 350°C over a long period of time or permanently.

[0007] To achieve the object, the invention consists in a connecting cable for, for example, high- and / or low-temperature-resistant, electrical connection to an electrical (component) element, for example a coil, a capacitor, a piezo element, a (platinum) measuring resistor or another sensor element, which is operated, for example, at least temporarily at a (nominal) maximum operating temperature of more than 350 °C (degrees Celsius) and / or at least temporarily at a (nominal) minimum operating temperature of less than -40 °C and / or serves as a sensor element, which, for example, comprises a 2-pole connecting cable: a first wire made of electrically conductive material, for example a metal; a second wire, for example identical in construction to the first wire, made of electrically conductive material, for example metal;• and a plurality of connecting elements, for example spherical or cylindrical and / or structurally identical, which are used for the mechanical, yet electrically insulated connection of the first and second wires, each made of a material having an electrical breakdown strength of not less than 300 V / mm (volts per millimeter) and a transformation temperature of more than 400°C (degrees Celsius), for example not less than 500°C, for example a glass or a plastic, wherein each of the connecting elements is mechanically connected to both the first wire and the second wire in such a way that the first and second wires are spaced apart from one another or electrically insulated, forming an electrical insulation resistance of not less than 1 MQ (megaohm);

[0008] Furthermore, the invention also consists in using such a connecting cable at an (operating) temperature of more than 350°C and / or in using such a connecting cable at an (operating) temperature of less than -40°C.

[0009] In addition, the invention also consists in a measuring device formed by means of such a connecting cable, which further comprises an electrical component serving as a sensor element, for example a resistive, capacitive, electrodynamic or piezoelectric, for converting at least one physical measurement variable into at least one electrical (measurement) signal, for example a voltage signal or a current signal, with at least one signal parameter dependent on the measurement variable, for example an electrical (signal) voltage and / or an electrical (signal) current, as well as an electronic measuring circuit for processing the at least one electrical (measurement) signal, and / or therein such a measuring device for measuring at least one physical and / or chemical measurement variable of a fluid medium and / or a medium which at least temporarily has a (measurement) temperature of more than 350°C and / or at least temporarily a (measurement) temperature of less than -40°C,to use.,

[0010] According to a first embodiment of the connecting cable of the invention, it is further provided that the first wire consists of a nickel-based alloy, for example a nickel-iron alloy.

[0011] According to a second embodiment of the connecting cable of the invention, it is further provided that the first core has a (core) diameter that is not more than 1 mm (millimeter), for example not more than 0.5 mm, and / or not less than 0.05 mm, for example not less than 0.1 mm. According to a third embodiment of the connecting cable of the invention, it is further provided that the first core has a (core) length that is not more than 200 mm, for example not more than 150 mm, and / or not less than 50 mm, for example not less than 70 mm.

[0012] According to a fourth embodiment of the connecting cable of the invention, it is further provided that the second wire consists of a nickel-based alloy, for example a nickel-iron alloy.

[0013] According to a fifth embodiment of the connecting cable of the invention, it is further provided that the second wire has a (wire) diameter which is not more than 1 mm, for example not more than 0.5 mm, and / or not less than 0.05 mm, for example not less than 0.1 mm.

[0014] According to a sixth embodiment of the connecting cable of the invention, it is further provided that the second wire has a (wire) length which is not more than 200 mm, for example not more than 150 mm, and / or not less than 50 mm, for example not less than 70 mm.

[0015] According to a seventh embodiment of the connecting cable of the invention, it is further provided that one or more connecting elements each consist of a glass, for example lead-free, for example a sealing glass.

[0016] According to an eighth embodiment of the connecting cable of the invention, it is further provided that one or more connecting elements each consist of a ceramic, for example Al2O3.

[0017] According to a ninth embodiment of the connecting cable of the invention, it is further provided that one or more connecting elements each consist of a, for example semi-crystalline, plastic, for example a polyetheretherketone (PEEK), a polyethersulfone (PES), a polyetherimide (PEI) or a polyamideimide (PAI).

[0018] According to a tenth embodiment of the connecting cable of the invention, it is further provided that within a connecting element a respective minimum distance between the first and second wires is not less than 1 mm.

[0019] According to an eleventh embodiment of the connecting cable of the invention, it is further provided that, for example outside the connecting elements, a minimum distance between the first and second wires is more than 1 mm, for example not less than 1.5 mm. According to a twelfth embodiment of the connecting cable of the invention, it is further provided that a minimum distance between two adjacent connecting elements is not less than 1 mm and / or not more than 20 mm.

[0020] According to a thirteenth embodiment of the connecting cable of the invention, it is further provided that no more than 3 connecting elements are arranged per 1 cm (centimeter) of length (of the first and second wires).

[0021] According to a fourteenth embodiment of the connecting cable of the invention, it is further provided that a minimum distance between two adjacent connecting elements is not less than 2 times a (core) diameter of the first and second cores and / or not more than 50 times a (core) diameter of the first and second cores.

[0022] According to a fifteenth embodiment of the connecting cable of the invention, it is further provided that a maximum length of one or more connecting elements is not less than 1 mm and / or not more than 30 mm.

[0023] According to a sixteenth embodiment of the connecting cable of the invention, it is further provided that a largest diameter of one or more connecting elements is not less than 1 mm.

[0024] According to a seventeenth embodiment of the connecting cable of the invention, it is further provided that a total mass of all connecting elements (of the connecting cable) is less than 10 g (grams), for example not more than 5 g.

[0025] According to an eighteenth embodiment of the connecting cable of the invention, it is further provided that a mass of each of the connecting elements is less than 2 g (grams), for example not more than 1 g; and / or

[0026] According to a nineteenth embodiment of the connecting cable of the invention, it is further provided that a (minimum) breakdown voltage between the first and second wires is not less than 200 V (volts), for example not less than 500 V.

[0027] According to a twentieth embodiment of the connecting cable of the invention, it is further provided that at least one (partial) segment extending between two adjacent connecting elements, for example several or all (partial) segments extending between adjacent connecting elements, of the first core is not covered by insulation made of a solid insulating material or is designed as a (bare) overhead line. According to a twenty-first embodiment of the connecting cable of the invention, it is further provided that at least one (partial) segment extending between two adjacent connecting elements, for example several or all (partial) segments extending between adjacent connecting elements, of the second core is not covered by insulation made of a solid insulating material or is designed as a (bare) overhead line.

[0028] According to a twenty-third embodiment of the connecting cable of the invention, it is further provided that none of the (partial) segments of the first and second wires extending between two adjacent connecting elements is sheathed by a solid insulating material or has no wire insulation, and that the same (partial) segments are not sheathed by a common (insulating material) sheath, thus the

[0029] Connecting cable (1000) in the area of ​​the same (partial) segments of the first and second wires (except the connecting elements) does not have any solid insulating material.

[0030] According to a twenty-fourth embodiment of the connecting cable of the invention, it is further provided that the first and second wires are each embedded in the connecting elements, for example, namely melted (to form a melt connection).

[0031] According to a twenty-fifth embodiment of the connecting cable of the invention, it is further provided that the first and second wires and the connecting elements are each connected to one another by means of a fused joint. Further developing this embodiment of the invention, it is further provided that the connecting elements consist of a (sealed) glass, and that the first and second wires and the connecting elements are each connected to one another by means of a fused glass joint.

[0032] According to a twenty-sixth embodiment of the connecting cable of the invention, it is further provided that a first (minimum) distance between a first pair of adjacent connecting elements differs from a second (minimum) distance between a second pair of adjacent connecting elements, for example such that the first (minimum) distance is more than 5 mm, in particular not less than 10 mm, smaller than the second (minimum) distance.

[0033] According to a further development of the connecting cable of the invention, this further comprises: a feed-through element, for example designed as a component of a (multi-pin) plug-in connection system having more than two contact elements, wherein the feed-through element has a base body made of a material having an electrical breakdown strength of not less than 300 V / mm and a transformation temperature of more than 400°C, for example not less than 500°C, for example a glass or a plastic, as well as first and second contact elements embedded in the base body, for example each formed by a plug-in contact or a plug-in sleeve, and wherein the first wire is electrically connected with a first (wire) end to the first contact element and the second wire is electrically connected with a first (wire) end to the second contact element, for example by means of a material connection.According to a further embodiment of the invention, it is further provided that one or more connecting elements are made of the same material as the base body.

[0034] According to an embodiment of the measuring device of the invention, it is further provided that the first and second wires of the connecting cable are electrically connected to the electronic measuring circuit by means of a respective first (wire) end and to the electrical (component) element by means of a respective second (wire) end, for example in such a way that a second (wire) end of the first wire is electrically connected to a first (connection) electrode of the electrical component and a second (wire) end of the second wire is electrically connected to a second (connection) electrode of the electrical (component) element.

[0035] According to a further development of the measuring device of the invention, this further comprises: a (protective) housing, for example a modular and / or chambered, within which the electrical (component) element, the measuring circuit and the connecting cable of the (protective) housing are arranged, and it is further provided that the first and second wires of the connecting cable are electrically connected by means of a respective first (wire) end to the electronic measuring circuit and by means of a respective second (wire) end to the electrical (component) element, for example in such a way that a second (wire) end of the first wire is electrically connected to a first (connection) electrode of the electrical component and a second (wire) end of the second wire is electrically connected to a second (connection) electrode of the electrical (component) element.

[0036] According to a first embodiment of this further development of the measuring device, it is further provided that the connecting cable is laid at least partially within a chamber of the (protective) housing filled with noble gas, for example argon and / or krypton.

[0037] According to a second embodiment of this further development of the measuring device, it is further provided that a (partial) segment of the first wire, located between the electrical (component) and the measuring circuit, for example laid in a freely swinging manner, and a (partial) segment of the second wire, located between the electrical (component) and the measuring circuit, for example laid in a freely swinging manner, are spaced from a wall of the (protective) housing, for example in such a way that a respective minimum distance between the wall of the (protective) housing and the first or second wire is not less than 1 mm, for example more than 2 mm. The invention and advantageous embodiments thereof are explained in more detail below with reference to exemplary embodiments which are illustrated in the figures of the drawing.Parts with the same function or functioning in the same way are provided with the same reference numerals in all figures; where clarity requires it or it otherwise seems expedient, previously mentioned reference numerals have been omitted in subsequent figures. Further advantageous embodiments or developments, in particular combinations of partial aspects of the invention initially explained only individually, will become apparent from the figures of the drawing and / or from the claims themselves.

[0038] In detail:

[0039] Fig. 1A, B embodiments of a connecting cable according to the invention;

[0040] Fig. 2 shows a perspective side view of an embodiment of a measuring device;

[0041] Fig. 3 shows a first sectional side view of the measuring device according to Fig. 2; and

[0042] Fig. 4 shows a second sectional side view of the measuring device according to Fig. 2.

[0043] 1A and 1B each schematically show an embodiment of a connecting cable 1000 according to the invention, for example a 2-pole or 2-wire connecting cable, which is intended or suitable for being connected to an electrical (component) element 101. The (component) element 101 can, for example, also be designed as a sensor element or serve as a sensor element of an (industrial) measuring device 1. An embodiment of such a measuring device is shown schematically in Figs. 2, 3 and 4, respectively. The electrical (component) element 101 can accordingly also be, for example, an electrical (component) element electrically connected via connecting cable 1000 to an electronic measuring circuit 102 of the measuring device 1 and / or a (sensor) coil, a (measuring) capacitor, a piezo element or a (platinum) measuring resistor.Such a measuring device can be, for example, a pressure measuring device, a temperature measuring device, a level measuring device or, as shown schematically in Fig. 2, 3 and 4, a flow measuring device, in particular a vortex flow measuring device (which determines a volume or mass flow on the basis of a Kärmänn vortex street).

[0044] According to one embodiment of the invention, the connecting cable (or the measuring system formed thereby) is also designed to withstand high temperatures, in particular, namely for an operating temperature of more than 350°C (degrees Celsius), or the connecting cable is configured to be connected to the electrical (component) element 102, which can be operated, for example, even at a (nominal) maximum (operating) temperature of more than 350°C. Alternatively or additionally, the connecting cable 1000 can also be intended to be operated at a (nominal) minimum (operating) temperature of less than 350°C, for example even at a very low (operating) temperature of less than -40°C.

[0045] The connecting cable 1000 comprises a first core 1011 made of electrically conductive material, (at least) one second core 1012 made of electrically conductive material, for example, identical to core 1011. In addition, the connecting cable 1000 according to the invention comprises a plurality (N>2) (exceeding 2) of connecting elements 1013 (1013.1, 1013.2, ... 1013.N) serving for the mechanical, yet electrically insulated connection of the first and second cores, for example, spherical or cylindrical and / or identical in structure. Each of these connecting elements, as also schematically illustrated in Fig. 1A and 1B, is mechanically connected to both core 1011 and core 1012, such that the first and second cores are spaced apart from one another, forming an electrical insulation resistance of not less than 1 MΩ (megaohm).are electrically insulated from one another; according to a further embodiment of the invention, this is particularly so that a (nominal) operating voltage of the connecting cable is 1000 V or a (minimum) breakdown voltage between the first and second wires is not less than 200 V (volts), in particular not less than 500 V.

[0046] The material of the first and / or second wires of the connecting cable 1000 can, in particular, be a metal, for example (fine) silver or a nickel-based alloy, such as a nickel-iron alloy. According to a further embodiment of the invention, a greatest length or a greatest diameter of one or more of the connecting elements 1013 is not less than 1 mm and / or not more than 30 mm, and / or the first and / or second wires each have a (wire) length that is not more than 200 mm, in particular not more than 150 mm, and / or not less than 50 mm, in particular not less than 70 mm. According to a further embodiment of the invention, the connecting elements are further connected to the first and second wires in such a way that within each connecting element 1013 (1013.1, 1013.2, 1013.3)N) a respective minimum distance between the first and second wires is not less than 1 mm (millimeter), and / or the first and second wires are arranged in such a way that, in particular also outside the.

[0047] Connecting elements 1013, a minimum distance between the first and second wires (permanently) is more than 1 mm, for example not less than 1.5 mm.

[0048] Not least for the above-described case where the minimum distance between the first and second wires outside the connecting elements is more than 1 mm or it is ensured that this minimum distance is permanently maintained, it is also possible to form the first and second wires at least partially as a (bare) overhead line. Accordingly, according to a further embodiment of the invention, at least one (partial) segment of the wire 1011 extending between two adjacent connecting elements is not covered by insulation made of a solid insulating material and / or a (partial) segment of the wire 1012 extending between two adjacent connecting elements is not covered by insulation made of a solid insulating material. For example, however, several or all of the wires extending between adjacent

[0049] Connecting elements 1013 (1013.1, 1013.2, 1013.N) extending (partial) segments of the first and / or second wires are not covered by insulation made of a solid insulating material, in particular in such a way that none of the aforementioned (partial) segments of the first and second wires is covered by a solid insulating material, thus having no wire insulation, and the same (partial) segments are also not covered by a common (insulating material) sheath, such as a cable sheath, thus the connecting cable 1000 in the area of ​​the same (partial) segments of the first and second wires (apart from the connecting elements) has no solid insulating material whatsoever. Due to such a reduction of for the wire 1012 orBy applying the (solid) insulating material used for the wire 1013 (to the connecting elements), a connecting cable 1000 with a line impedance that remains stable even at very high and / or very low operating temperatures can be provided in a very simple manner.

[0050] In order to enable the aforementioned high operating temperatures as well as the aforementioned high operating voltages (if necessary also with the first and second wires designed as overhead lines), the connecting elements 1013 in the connecting cable 1000 according to the invention are further made of a material which, on the one hand, has an electrical breakdown strength of not less than 300 V / mm (volts per millimeter) and, on the other hand, has a transformation temperature (glass transition temperature) of more than 400°C, for example not less than 500°C, or the connecting elements 1013 are each made of such a material.According to a further embodiment, one or more, for example all, connecting elements 1013 each consist of a glass, for example a lead-free glass and / or a sealing glass, and / or each of a ceramic, for example an aluminum oxide ceramic (AI2O3) or a glass ceramic, and / or each of a (semi-crystalline) plastic, for example a polyetheretherketone (PEEK), a polyethersulfone (PES), a polyetherimide (PEI) or a polyamideimide (PAI).According to a further embodiment of the invention, the first and second wires are each embedded in the connecting elements 1013, for example, fused (to form a fused bond), and / or the first and second wires and the connecting elements 1013 are each connected to one another by means of a fused bond, for example, in the aforementioned case where the connecting elements 1013 consist of a (fused) glass, by means of a fused glass bond. Last but not least, for the already mentioned case in which the connecting cable 1000 serves or is intended to be electrically connected to a measuring circuit (102) of a measuring device (1), the connecting cable 1000, according to a further embodiment, comprises a feedthrough element 1014 having a base body 1014.1 and first and second contact elements 1014.2, 1014.3 embedded in the base body. The base body 1014.1 can furthermore also be arranged, for example, in a sleeve 1014.4 of the feedthrough element 1014 and / or be formed in-situ within the sleeve 1014.4 by first allowing liquid material to harden or solidify within the sleeve 1014.4.

[0051] In this embodiment, the wire 1011 is electrically connected with a first (wire) end 1011.1 to the first contact element 1014.2 (of the feedthrough element), and the wire 1012 is electrically connected with a first (wire) end 1012.1 to the second contact element (of the feedthrough element), for example, also by means of a material connection. The feedthrough element 1014 can, for example, be designed as a component of a (multi-pin) plug connection system having more than two contact elements (1014.2, 1014.2, ... 1014.N). Thus, the contact elements can each be formed, for example, by a plug contact or a plug sleeve. Alternatively or additionally, the base body can advantageously consist of a material, for example a glass or a plastic, which has an electrical breakdown strength of not less than 300 V / mm and a transformation temperature of more than 400°C, in particular not less than 500°C.The base body 1014.1 can be made of such a material. According to a further embodiment of the invention, one or more, for example, all, connecting elements of the connecting cable are also made of the same material as the base body 1014.1 (the feedthrough element) and / or the mass of each of the connecting elements is less than 2 g (grams), in particular not more than 1 g.

[0052] In order to achieve the lowest possible overall installation mass of the connecting cable 1014 and the highest possible vibration resistance of the connecting cable, not least in the event of excitation of one or more of its mechanical resonance frequencies, according to a further embodiment of the invention, the total mass of all connecting elements (of the connecting cable) is less than 10 g (grams), for example, not more than 5 g, and / or the first and / or second wires each have a (wire) diameter of not less than 0.05 mm, in particular not less than 0.1 mm, not least in order to achieve sufficiently high tear resistance. Alternatively or additionally, the (wire) diameter of the first and / or second wires can also be selected such that it is not more than 1 mm, for example not more than 0.5 mm.To achieve the lowest possible installation mass on the one hand and the highest possible stability of the aforementioned minimum distance between the first and second wires on the other, according to a further embodiment of the invention, a minimum distance between two adjacent connecting elements is not less than 1 mm and / or not less than twice the (wire) diameter of the first and second wires. Alternatively or additionally, the aforementioned minimum distance between two adjacent connecting elements can also be selected such that it is not more than 20 mm and / or not more than 50 times the (wire) diameter of the first and second wires, and / or the connecting elements can also be arranged such that no more than 3 connecting elements are arranged per 1 cm of length (of the first and second wires).According to a further embodiment of the invention, it is further provided that - for example, in order to provide a grip zone (1013.1+1013.N) simplifying the handling of the connecting cable 1014 during its (final) assembly - a first (minimum) distance between a first pair of adjacent connecting elements (1013.1, 1013.N) deviates from a second (minimum) distance between a second pair of adjacent connecting elements; this in particular in such a way that the aforementioned first (minimum) distance is more than 5 mm, in particular not less than 10 mm, smaller than the aforementioned second (minimum) distance.

[0053] As already indicated several times, the connecting cable 1000 together with the aforementioned electrical component 101 connected thereto can also be components or parts of an (industrial) measuring device (1), for example namely a measuring device for measuring at least one physical or chemical measurement variable of a fluid medium and / or a medium which at least temporarily has a (measured medium) temperature of more than 350 °C and / or at least temporarily a (measured medium) temperature of less than -40 °C. The component 101 can accordingly, as already indicated, for example as a resistive, capacitive, electrodynamic or piezoelectric sensor element for converting at least one physical measurement variable, for example a pressure, a temperature or a volume orMass flow of a fluid, into at least one electrical (measurement) signal s1, for example a voltage signal or a current signal, with at least one signal parameter dependent on the measured variable, in particular an electrical (signal) voltage and / or an electrical (signal) current.

[0054] According to a further embodiment of the invention, it is further provided that the aforementioned measuring device, as also schematically shown in Fig. 3 and 4 respectively, has an electronic measuring circuit 102 for processing the at least one electrical (measurement) signal s1, for example namely for determining measured values ​​XM representing at least one measured variable of a fluid medium guided within the measuring device on the basis of the (measurement) signal s1, and that the first and second wires of the connecting cable 1000 are connected by means of the respective first (wire) end 1011.1, 1012.1, which is also received, for example, in the aforementioned feedthrough element 1014, to the aforementioned electronic measuring circuit 102 (of the measuring device) and by means of a respective second (wire) end 1011.2, 1012.2 are electrically connected to the aforementioned electrical (component) element 101, for example in such a way that a second (wire) end of the first wire is electrically connected to a first (connection) electrode of the electrical component 101 and a second (wire) end of the second wire is electrically connected to a second (connection) electrode of the electrical component 101. As also schematically shown in Fig. 2, 3 and 4 or readily apparent from their combination, the aforementioned measuring device 1 can further comprise a (protective) housing 120, for example a modular and / or (multiple) chambered, and the electrical (component) element 101, the measuring circuit 102 and the connecting cable 1000 can be arranged within the same (protective) housing 120. According to a further embodiment of the invention, the.

[0055] (Protective) housing 102 (of the measuring device) further comprises at least one chamber 120.1 filled with noble gas, for example argon (Ar) and / or krypton (Kr), and the connecting cable is laid at least partially within the same chamber.

[0056] According to another embodiment of the invention, it is further provided that a (partial) segment of the wire 1011 located between the electrical (component) element 101 and the measuring circuit 102, as well as a (partial) segment of the wire 1012 located between the electrical (component) element 101 and the measuring circuit 102, are spaced from a wall of the (protective) housing 120, in particular such that a respective minimum distance between the wall of the (protective) housing 120 and the first or second wire is not less than 1 mm, in particular more than 2 mm. Alternatively or additionally, the aforementioned (partial) segment of the first and / or second wire can also be laid in a freely swinging manner, for example, at least within the aforementioned chamber, as also schematically shown in Fig. 3 and 4, respectively.

Claims

PATENT CLAIMS 1. Connecting cable for electrical connection, in particular for high and / or low temperature resistant, to an electrical (component) element, in particular a coil, a capacitor, a piezoelectric element, a (platinum) measuring resistor or another sensor element, which is operated at least temporarily at a (nominal) maximum operating temperature of more than 350°C (degrees Celsius) and / or at least temporarily at a (nominal) minimum operating temperature of less than -40°C and / or serves as a sensor element, in particular a coil, a capacitor, a piezoelectric element, a (platinum) measuring resistor or another sensor element, which includes, in particular, 2-pole connecting cables: - a first conductor made of electrically conductive material, in particular of a metal; - a second conductor, in particular identical in construction to the first conductor, made of electrically conductive material, in particular metal; - as well as a plurality of connecting elements (1013.1 , 1013.2 , 1013.3 , 1013. N) serving for the mechanical, yet electrically insulated connection of the first and second conductors, in particular spherical or cylindrical and / or identical in construction, each made of a material having an electrical dielectric strength of not less than 300 V / mm and a transformation temperature of more than 400°C, in particular not less than 500°C, in particular a glass or a plastic, wherein each of the connecting elements is mechanically connected to both the first conductor and the second conductor, such that the first and second conductors are spaced apart or electrically insulated from each other, forming an electrical insulation resistance of not less than 1 MΩ.

2. Connecting cable according to one of the preceding claims, - wherein the first conductor consists of a nickel-based alloy, in particular a nickel-iron alloy; and / or - wherein the first conductor has a (conductor) diameter that is not more than 1 mm, in particular not more than 0.5 mm, and / or not less than 0.05 mm, in particular not less than 0.1 mm; and / or - wherein the first conductor has a length that is not more than 200 mm, in particular not more than 150 mm, and / or not less than 50 mm, in particular not less than 70 mm.

3. Connecting cable according to one of the preceding claims, - wherein the second conductor consists of a nickel-based alloy, in particular a nickel-iron alloy; and / or - wherein the second conductor has a (conductor) diameter that is not more than 1 mm, in particular not more than 0.5 mm, and / or not less than 0.05 mm, in particular not less than 0.1 mm; and / or - wherein the second conductor has a length that is not more than 200 mm, in particular not more than 150 mm, and / or not less than 50 mm, in particular not less than 70 mm.

4. Connecting cable according to one of the preceding claims, - wherein one or more connecting elements each consist of a glass, in particular lead-free glass, in particular a glass melt; and / or - wherein one or more connecting elements each consist of a ceramic, in particular Al2O3; and / or - wherein one or more connecting elements each consist of a plastic, in particular a semi-crystalline plastic, in particular a polyetheretherketone (PEEK), a polyethersulfone (PES), a polyetherimide (PEI) or a polyamideimide (PAI); and / or - wherein within a connecting element the minimum distance between the first and second conductors is not less than 1 mm (millimeter); and / or - wherein, especially outside the connecting elements, the minimum distance between the first and second conductors is more than 1 mm, especially not less than 1.5 mm; and / or - wherein no more than 3 connecting elements per 1 cm length (of the first and second conductors), in particular no more than 3 connecting elements per 50 mm length (of the first and second conductors), are arranged; and / or - wherein no fewer than 2 connecting elements per 50 mm length (of the first and second conductors), in particular no fewer than 3 connecting elements per 50 mm length (of the first and second conductors), are arranged; and / or - wherein a minimum distance between two adjacent connecting elements is not less than 1 mm and / or not more than 20 mm; and / or - wherein a minimum distance between two adjacent connecting elements is not less than twice the diameter of the first and second conductors and / or not more than 50 times the diameter of the first and second conductors; and / or - wherein the maximum distance between two adjacent connecting elements is not less than 1 mm and / or not more than 20 mm; and / or - wherein a maximum distance between two adjacent connecting elements is not less than twice the diameter of the first and second conductors and / or not more than 50 times the diameter of the first and second conductors; and / or - wherein a first (minimal) distance between a first pair of adjacent connecting elements (1013.1 , 1013. N) differs from a second (minimal) distance between a second pair of adjacent connecting elements, in particular such that the first (minimal) distance is more than 5 mm smaller than the second (minimal) distance; and / or - wherein the greatest length of one or more connecting elements is not less than 1 mm and / or not more than 30 mm; and / or - wherein the largest diameter of one or more connecting elements is not less than 1 mm; and / or - wherein the mass of each of the connecting elements is less than 2 g (grams), in particular not more than 1 g; and / or - wherein the total mass of all connecting elements (of the connecting cable) is less than 10 g (grams), in particular not more than 5 g; and / or - wherein the first and second conductors are each embedded in the connecting elements (1013), in particular fused in (forming a fusion bond); and / or - wherein the first and second conductors and the connecting elements (1013) are each connected to each other by means of a fusion connection.

5. Connecting cable according to one of the preceding claims, wherein a (minimal) breakdown voltage between the first and second conductors is not less than 200 V(volts), in particular not less than 500 V.

6. Connecting cable according to one of the preceding claims, - wherein at least one (partial) segment extending between two adjacent connecting elements, in particular several or all (partial) segments extending between adjacent connecting elements, of the first conductor is not sheathed by insulation made of a solid insulating material or is designed as a (bare) overhead line, and / or - wherein at least one (partial) segment extending between two adjacent connecting elements, in particular several or all (partial) segments extending between adjacent connecting elements, of the second conductor is not sheathed by insulation made of a solid insulating material or is designed as a (bare) overhead line, in particular such that none of the (partial) segments of the first and second conductors extending between two adjacent connecting elements is individually sheathed by a solid insulating material or has no conductor insulation, and that these (partial) segments are not enclosed by a common (insulating) sheath, and thus the connecting cable (1000) in the area of ​​these (partial) segments of the first and second conductors (apart from the connecting elements) has no solid insulating material whatsoever.

7. Connecting cable according to one of the preceding claims, further comprising: a base body made of a material having an electrical dielectric strength of not less than 300 V / mm and a transformation temperature of more than 400°C, in particular not less than 500°C, in particular a glass or a plastic, and first and second contact elements embedded in the base body, in particular formed by means of a plug contact or a plug sleeve, in particular as a component of a Feedthrough element comprising more than two contact elements of a (multipin) connector system, wherein the first conductor is electrically connected to the first contact element with a first (conductor) end and the second conductor is electrically connected to the second contact element with a first (conductor) end, in particular by means of a material connection.

8. Connecting cable according to the preceding claim, wherein one or more connecting elements are made of the same material as the base body.

9. Using a connecting cable according to one of the preceding claims at an (operating) temperature above 350°C; and / or using a connecting cable according to one of the preceding claims at an (operating) temperature below -40°C.

10. Measuring instrument, comprehensive: - an electrical component serving as a sensor element, in particular a resistive, capacitive, electrodynamic or piezoelectric, for converting at least one physical measured quantity into at least one electrical (measurement) signal, in particular a voltage signal or a current signal, with at least one signal parameter dependent on the measured quantity, in particular an electrical (signal) voltage and / or an electrical (signal) current; - an electronic measuring circuit for processing the at least one electrical (measurement) signal; - and a connecting cable according to one of the preceding claims.

11. Measuring device according to the preceding claim, wherein the first and second conductors of the connecting cable are electrically connected to the electronic measuring circuit by means of a respective first (conductor) end and to the electrical (component) element by means of a respective second (conductor) end, in particular such that a second (conductor) end of the first conductor is electrically connected to a first (connecting) electrode of the electrical component and a second (conductor) end of the second conductor is electrically connected to a second (connecting) electrode of the electrical (component) element.

12. Measuring device according to the preceding claim, further comprising: a (protective) housing, in particular a modular and / or chambered one, wherein the electrical (component), the measuring circuit and the connecting cable are arranged inside the (protective) housing.

13. Measuring device according to the preceding claim, - wherein the connecting cable is at least partially routed within a chamber of the (protective) housing filled with noble gas, in particular argon and / or krypton; and / or - wherein a (partial) segment of the first conductor located between the electrical (component) and the measuring circuit, in particular laid freely, as well as a segment between the electrical The (partial) segment of the second conductor, located in the (construction) element and the measuring circuit, is spaced away from a wall of the (protective) housing, in particular in such a way that the respective minimum distance between the wall of the (protective) housing and the first or second conductor is not less than 1 mm, in particular more than 2 mm.

14. Using a measuring device according to one of claims 10 to 13 for measuring at least one physical and / or chemical quantity of a fluid substance and / or a substance which has at least temporarily a (substance) temperature of more than 350 C and / or at least temporarily a (substance) temperature of less than -40 C.

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