Measurement setup and holder

Abstract

A measurement setup for measuring the temperature of a test specimen is provided, in which at least two mutually separated wires suitable for heat conduction are drawn out from one test specimen and gathered into one wire bundle at a distance from the test specimen, and a temperature sensor is fixed to the wire bundle via a clamping force using a holder. Preferably, the holder comprises a holder base having an inner surface and an outer surface and a spring clamp connected thereto, a recess for receiving the temperature sensor is arranged on the inner surface of the holder base, and the two spring clamps are arranged opposite to each other with respect to the holder base and are suitable for generating a clamping force in a direction toward the inner surface of the holder base.

Description

Technical Field

[0001] The present invention relates to a measurement setup and a holder for measuring temperature.

Background Art

[0002] Temperature detection or temperature measurement is important in various technical systems. This also applies to electric motors, such as in electromobility applications.

[0003] The concept of temperature measurement is known, for example, from WO00 / 2019115224A1 or US10 / 436,648B2.

Summary of the Invention

[0004] One object of the present invention is to provide a temperature measurement method that improves the above concept. Further objects are solved by advantageous embodiments of the present invention.

[0005] According to a first aspect, a measurement setup for measuring the temperature of a test body is provided, wherein at least two mutually separated wirings suitable for heat conduction are led out from one test body and are combined into one wiring bundle at a distance from the test body. Further, a temperature sensor is fixed to the wiring bundle via a clamping action using a holder.

[0006] In the measurement setup according to the first aspect, wirings suitable for heat conduction, i.e., wirings having good heat conduction, are preferred. For example, the heat conduction of metals can be regarded as good heat conduction.

[0007] Therefore, the wiring preferably has a metallic component or is made of metal. For example, the wiring may have a core containing a metallic component and covered with an insulator. The covering may be a thermal or electrical insulator. Preferred metallic components are copper, silver, aluminum, or gold. Alternatively, alloys with a high proportion of these metals are preferred, where a high proportion means that these metals make up at least 50%. More preferably, the core or the entire wiring is made of one of the above metals. This could be, for example, a copper conductor.

[0008] The wiring is routed from the test specimen and bundled together at a certain distance from the specimen. Therefore, temperature measurements are taken on the wiring bundle, not directly on the specimen. This allows for temperature measurements at locations on the specimen where sensors cannot be directly attached. It is sufficient that the wiring can be attached to the specimen.

[0009] The distance from the test specimen is understood to mean that at least one of the wires is not bundled with other wires in the wiring bundle at its starting point on the test specimen. Here, it is irrelevant whether the wires are already directly bundled on the test specimen or not. The wiring bundle can preferably be understood as the bundled area of ​​wires where temperature measurements are also performed, i.e., the area where the holder and temperature sensor are located.

[0010] Preferably, the distance between the starting point of the wiring and the wiring bundle, measured along the wiring path, is 1 to 100 cm.

[0011] The wiring bundle can be described here as the measuring object (Messkoerper) on which the actual temperature measurement is performed, i.e., the measuring object to which the temperature sensor is applied. In contrast, the test object is the object whose temperature is measured in the measurement setup.

[0012] At a certain distance from the test specimen, at least two wires are bundled together to form a wiring bundle. Preferably, the wires within the wiring bundle are nearly parallel and in direct contact with each other. Outside the wiring bundle, the wires are not bundled.

[0013] If the wiring has an insulator, within the wiring bundle, the wiring is preferably at least partially deinsulated. This has the advantage of allowing the temperature of thermally conductive metal components to be measured directly.

[0014] The temperature sensor used here is essentially any temperature sensor. Particularly preferred is one suitable for accurately detecting temperature in the temperature range of -55°C to 300°C, and more preferably in the temperature range of -40°C to 200°C. In particular, an NTC sensor is preferred as the temperature sensor.

[0015] The temperature sensor is secured to the wiring bundle by a clamping action. The temperature sensor is preferably clamped to the wiring bundle. For this reason, the holder is preferably clamped around the wiring bundle. Accordingly, the temperature sensor is not inserted between at least two separate wires. Any suitable retaining device can be used as the holder. A clamping holder or clamp is preferred. More preferably, the holder or clamp described below is used.

[0016] Furthermore, the holder or clamp is also suitable for holding the wiring together as a bundle. However, this is not essential and can be achieved by other means.

[0017] In a preferred embodiment, the measurement setup is designed such that all wiring is secured to different locations on the test specimen.

[0018] In other words, all wiring can originate from different points on the test specimen. This has the special advantage that the temperature sensor can measure the average temperature at at least two different points.

[0019] When using two or more separate wirings, the averaging of the test specimen's temperature becomes even more precise and accurate.

[0020] In particular, the combination of the first embodiment and the preferred embodiment achieves even greater inventive advantages because it is possible to record the average temperature at many measurement points on the test specimen without having to directly attach multiple temperature sensors, which are bulkier than wiring, to the test specimen.

[0021] In a more preferred embodiment, the wiring is bundled together in the area of ​​the wiring bundle by a bundling means. Furthermore, in this preferred embodiment, the temperature sensor is clamped or pressed against the bundling means by a holder.

[0022] Furthermore, it is preferable that the fastening means be a separate component from the holder.

[0023] As a result, according to this embodiment, the temperature is preferably measured in the binding means. Therefore, the binding means can be referred to as a measuring body according to the above definition. For temperature measurement, the binding means preferably has a surface against which a temperature sensor can be pressed together with a holder.

[0024] Preferably, the fastening means has good thermal conductivity. Furthermore, preferably, the fastening means is mechanically stable. Preferably, the fastening means is a metal fastening means. Many metals possess both high thermal conductivity and sufficient mechanical stability. For example, the fastening means includes iron, steel, stainless steel, copper, aluminum, or alloys containing these materials. It can be made of these materials. Of these materials, steel or stainless steel in particular is relatively particularly mechanically stable and has sufficiently good thermal conductivity. In some embodiments, the fastening means may also be provided with a coating.

[0025] For example, if the wiring includes an insulator in addition to a thermally conductive material, the insulator can be removed at least partially in the area of ​​the binding means.

[0026] For example, the fastening means can be a crimp.

[0027] More preferably, the fastening means is a hot crimp.

[0028] Hot crimping has the advantage that during the crimping process, the possible insulator automatically peels off due to temperature.

[0029] Furthermore, the hot crimp can preferably have an elliptical shape with a smooth surface. The smooth surface is particularly suitable for clamping the temperature sensor. For example, a suitable holder as described later can be particularly efficiently attached in an elliptical shape.

[0030] According to a further preferred embodiment, the wiring can be electrical wiring. They are preferably current supply lines to the test body or perform such a role.

[0031] Here, the supply line includes all lines through which current can flow in or out. Therefore, the supply line can also be connected to, for example, the ground.

[0032] According to a further aspect of the measurement setup, the test body can be an electric motor.

[0033] Since conventional motors have many inaccessible locations for temperature measurement, electric motors are particularly suitable for the above measurement methods or measurement setups.

[0034] Furthermore, accurate and averaged temperature measurements are very important for modern electric motors, for example, in the field of electric vehicles (Elektromobilitaet).

[0035] According to a further aspect of the present invention, a holder is described.

[0036] Herein, the present invention is primarily directed toward a holder, and also describes the relationship between a temperature sensor that can be housed within this holder and a measuring body to which it can be attached. The holder is considered independent of these other components according to the present invention. However, the present invention also includes any described assemblies in which the holder is installed together with the measuring body and / or the sensor. Furthermore, the present invention also includes ensembles of these components, in which the components may be adjacent to one another without being installed together.

[0037] The holder described below is particularly suitable for the measurement setup described above.

[0038] A holder comprising a holder base having an inner and outer surface, and spring clamps connected thereto, will be described. Here, a recess for receiving a temperature sensor is provided on the inner surface of the holder base. Furthermore, two of the spring clamps are positioned opposite each other with respect to the holder base. These are suitable for generating a clamping force in the direction toward the inner surface of the holder base.

[0039] The inner surface is preferably the surface facing the object being measured in the measurement setup or measurement assembly. Therefore, the outer surface is preferably the surface facing away from the object being measured.

[0040] The recess is located on the inner surface of the holder base, so that the sensor to be fitted into the holder can lie directly on the measuring object, for example on a hot crimp, without any holder components being positioned between the sensor and the measuring object. Preferably, the temperature sensor rests on the contact surface on the measuring object. The contact surface is particularly suitable for establishing a thermally conductive contact. Preferably, the contact surface faces away from the inner surface of the holder base.

[0041] In this way, good heat conduction can be provided between the object being measured and the sensor, and a complex sensor shape can be avoided. In particular, there is no need to form any protruding parts from the sensor body that make thermal contact with the object being measured via the holder or by passing near the holder's components.

[0042] Two spring clamps, facing each other relative to the holder base, form a pair. Their corresponding arrangement allows the measuring object, such as a hot crimp, to be gripped from two opposing surfaces, i.e., mutually. In other words, force can be applied symmetrically from both sides. This allows a component of the clamping force (Anteil) to act in the inward direction of the holder base. In this way, a temperature sensor (einzulegender) to be fitted into a recess (einzulegender) can be pressed against the measuring object.

[0043] Within the holder, the temperature sensor can be pressed into the recess by a clamping force toward the inner surface of the holder base, without the need for any further holders, fasteners, or clamps.

[0044] Therefore, the clamping force component acts from one spring clamp to the other, and as a result, the object to be measured can also be clamped between both clamps.

[0045] According to a preferred embodiment of the holder, the recess includes a stopper that can prevent the temperature sensor, which is to be fitted into the recess, from moving out of the recess.

[0046] It is preferable that the temperature sensor to be fitted is in contact with the stopper.

[0047] The direction perpendicular to the stopper from the center of the recess can be considered the insertion direction of the temperature sensor to be fitted. Therefore, the temperature sensor to be fitted is preferably fitted in the insertion direction.

[0048] It is preferable to have a stopper that prevents the temperature sensor from moving in the insertion direction from the recess.

[0049] Furthermore, it is preferable that the sensor to be fitted is restricted by other sides, such as a spring clamp, or by the side wall of the holder base to which the spring clamp extends, as described above.

[0050] In a more preferred embodiment, the holder includes a clamp tab for securing a temperature sensor to be fitted into a recess.

[0051] This allows the temperature sensor to be held or fixed in the recess without the need to press the holder containing the sensor against the object being measured.

[0052] The clamp tabs preferably extend outward from the internal region of the holder base.

[0053] The clamp tab preferably extends along one side of the recess. Preferably, the clamp tab extends along a direction defined parallel to the direction from the outer surface to the inner surface, so as to extend from the inner region of the holder base. Preferably, the clamp tab is not located on the side where the stopper is located. More preferably, the clamp tab is located parallel to the fitting direction, and the clamping action of the clamp tab acts perpendicular to the fitting direction. Preferably, the clamp tab clamps the sensor to be fitted into the recess against the side wall of the recess facing the clamp tab.

[0054] Some of the force also acts in the direction of the inner surface of the sensor base. However, the important point here is that the clamp tab does not extend over the contact surface of the sensor. For example, if the shape of the sensor is partially circular or partially elliptical, the clamp tab can partially surround the sensor without extending over the contact surface. As a result, the clamp tab generally has a shape that at least partially conforms to the sensor to be fitted into the recess (passende Form). Consequently, the clamp tab can at least partially form-couple around the sensor (formschluessig umschliessen).

[0055] Alternatively or additionally, the clamp tab can engage with a suitable recess or notch engagement area on the sensor to better secure the sensor.

[0056] Furthermore, a second clamping tab can be additionally placed on the side of the recess opposite to the aforementioned clamping tab. This pair of clamping tabs can create a symmetrical clamping force load on the sensor. In this way, even more stable fixation can be achieved.

[0057] Preferably, the holder can be manufactured as a single unit. This has the advantage of avoiding weak points in the joints of assembled components.

[0058] In other words, the holder can be made from the same material in all its areas.

[0059] This, along with the aforementioned embodiments, has the special advantage that the holder is formed from the same flexible material, thereby providing the required flexibility and clamping force to both the spring clamp and one or more clamping tabs.

[0060] In a more preferred embodiment, the holder can be manufactured as a press-bent part (Stanzbiegeteil). This has the particular advantage of being easy to manufacture. Therefore, such a holder is preferably made from sheet metal (Blech). The sheet metal preferably includes steel, stainless steel, copper, or aluminum. It can also be made of these materials or alloys containing these materials. The sheet metal can be coated.

[0061] Alternatively, the holder can be made of plastic or manufactured from plastic. This means the holder can be particularly lightweight. In this way, the routing of the wiring bundle can be ensured that the weight of the holder does not impede it.

[0062] Suitable plastics can be selected from polyamides such as polyamide 66, polypropylene, polyphthalamide, polyphenylene sulfide, or polyurethane. In principle, the applicability of the plastic holder depends on the application temperature. The choice of plastic can also be adjusted to the application temperature.

[0063] In a further embodiment, the recess is provided with an opening, allowing electrical wiring to be guided into the opening.

[0064] These electrical wires are preferably input or output contacts of a temperature sensor that are to be fitted into the recess.

[0065] The opening can preferably be positioned on the surface opposite the stopper. The direction from the opening side to the stopper side can preferably correspond to the fitting direction. Around the holder, the electrical wiring can also extend substantially in the fitting direction. Preferably, the fitting direction, and therefore the local guiding direction of the wiring, is oriented perpendicular to the wiring of the wiring bundle. Thus, the sensor wiring can be pulled out from the wiring bundle as efficiently as possible. This avoids sharp bends (scharfes abknicken) of the wiring.

[0066] In a further embodiment, the recess is shaped such that a temperature sensor can be inserted into the recess in a shape-fitting manner, at least partially.

[0067] To mean at least partially shape-matched can mean, for example, that the side not in contact with the object being measured fits its shape into the recess. The recess does not need to replicate all the shape features of the temperature sensor or one side of the temperature sensor. However, shape-matching here means that the shape of the temperature sensor mimics the positive shape, at least in its negative portion, to the extent that the wobble of the temperature sensor within the recess is minimized.

[0068] In a further embodiment, the holder further comprises two spring clamps positioned opposite each other with respect to the holder base and suitable for generating a clamping force toward the inner surface of the holder base.

[0069] In this embodiment, the holder is provided with four spring clamps. Each of these four spring clamps forms a pair of opposing spring clamps, and can be understood as a spring clamp pair.

[0070] The second spring clamp pair can have similar characteristics to the first spring clamp pair.

[0071] The four spring clamps are preferably arranged symmetrically with respect to the holder base. This allows for stable four-point fixation or four-point clamping of the temperature sensor to the measuring object.

[0072] In a further preferred embodiment of the holder, the spring clamp is suitable for at least partially surrounding an elliptical measuring body in order to produce a clamping action and to effectively fasten it to the measuring body, and the spring clamp contacts the measuring body undersized or smaller while conforming to its shape as much as possible.

[0073] Many measuring objects, where temperature may be measured, are more or less elliptical. In particular, typical hot crimps are elliptical.

[0074] In particular, with respect to elliptical shapes, shape coupling means that a part of the spring clamp mimics the shape at least partially. In this case, the shape can be smaller, i.e., smaller than the shape of the object being measured when not clamped, or it can mimic an elliptical shape with, for example, a very small opening angle or radius. By clamping, the smaller shape is expanded, thereby generating a clamping action as a reaction force to the expansion.

[0075] In a more preferred embodiment, the material of the spring clamp is selected to be elastic (federelastisch) under a temperature load of 100°C to 200°C.

[0076] The materials mentioned above are particularly suitable for this purpose.

[0077] This characteristic makes the holder elastic over a typical temperature range, making it particularly suitable for use with electric motors in electric vehicles.

[0078] More preferably, the spring clamp remains elastic even under engine starting conditions, i.e., in a temperature range of -20 to 50°C.

[0079] Similar requirements are preferably also met by clamp tabs.

[0080] The present invention will be described in more detail below with reference to exemplary embodiments. These exemplary embodiments are shown in the following figures, which are not to scale. Therefore, lengths, relative dimensions, and absolute dimensions cannot be read from the figures. Furthermore, the present invention is not limited to the following figures. [Brief explanation of the drawing]

[0081] [Figure 1] Figure 1 is a perspective view showing one embodiment of the holder. [Figure 2] Figure 2 shows the inner surface of an embodiment of the holder. [Figure 3]Figure 3 shows a side view of an embodiment of the holder. [Figure 4] Figure 4 shows further aspects of the holder embodiment. [Figure 5] Figure 5 is a perspective view showing one embodiment of the measurement arrangement. [Figure 6] Figure 6 is a schematic diagram showing one embodiment of the measurement setup. [Modes for carrying out the invention]

[0082] Figures 1 to 4 are different diagrams of a first embodiment of the holder 1 according to the present invention. In all cases, the coordinate system x,y,z of the holder 1 is shown, which can be considered as the internal coordinate system of the holder 1.

[0083] As can be seen in all of Figures 1 to 4, the holder 1 has a holder base 11. Further components, including the spring clamp 14, extend from the holder base 11.

[0084] In particular, the holder base 11 has an inner surface 12 and an outer surface 13. The inner surface 12 is particularly recognizable in the diagram of Figure 2.

[0085] The direction from the inner surface 12 to the outer surface 13 corresponds to the z-direction of the coordinate system shown next to the holder 1.

[0086] Furthermore, the holder base is provided with a recess 15. This recess 15 is suitable for at least partially fitting a temperature sensor.

[0087] A stopper 16 is provided in the recess 15. The opening 18 is positioned in the recess 15 opposite the stopper 16. The direction from the opening 18 toward the stopper 16 corresponds to the x-direction of the coordinate system.

[0088] Furthermore, the recess 15 has side walls oriented along the x-direction. These define the recess 15 perpendicular to the y-direction.

[0089] A clamp tab (Klemmlasche) 17 is formed on one of the side walls. This is suitable for securing the temperature sensor to be fitted by a clamping action that presses it against the opposing side walls of the recess 15 or against the inner surface 12. Preferably, the temperature sensor is pressed against the recess 15 in both of these directions. The clamp tab 17 is preferably machined from the side wall during manufacturing.

[0090] The x-direction corresponds to the insertion direction of the temperature sensor to be inserted into the holder 1, and the stopper 16 prevents movement from the recess 15 of the holder 1 in the insertion direction or sliding out of the recess 15 of the holder 1 in the insertion direction. For this purpose, it is preferable that the flat portion of the stopper 16 is oriented perpendicular to the insertion direction of the temperature sensor (in this case, the x-direction). In other words, the surface normal of the flat portion of the stopper 16 is oriented in the opposite direction to the x-direction.

[0091] A total of four spring clamps 14 extend from the holder base 15, and the web 19 extends so as to be attached to the side wall of the recess 15, with the spring clamps 14 positioned perpendicular to the web path above it. In this way, the spring clamps 14 that face each other in the X direction and are positioned at both ends of one web 19 can be defined as a spring clamp pair.

[0092] Alternatively, only two spring clamps (not shown) can be arranged facing each other in the x-direction, preferably filling the free space between adjacent spring clamps 14 in the y-direction with a material that connects the spring clamps.

[0093] The clamping action of the spring clamp 14 is preferably oriented perpendicular to the clamping action of the clamp tab 17. In particular, the insertion direction (x direction) is parallel to the clamping action of the spring clamp 14. This allows the temperature sensor to be inserted perpendicular to the path of the object being measured (Verlauf eines Messkoerpers).

[0094] Each spring clamp 14 extends outward from the web 19, and its clamping action is parallel to the insertion direction. Therefore, any tension or force generated by the spring clamps, or any tension or force acting on the spring clamps in the measurement setup, cannot be transmitted to the holder base. This prevents the holder base from being bent parallel to the Y direction under load.

[0095] The holders shown in Figures 1 to 4 can be manufactured as press-bent parts or constructed from plastic. The holders are preferably manufactured integrally (einstueckig).

[0096] Figure 5 shows the measurement assembly 30. This measurement assembly 30 can be part of a measurement setup, for example, as shown in Figure 6.

[0097] In the measurement setup shown in Figure 6, a test specimen 100 from which wiring 101 is drawn is schematically depicted. The test specimen 100 can represent, for example, an electric motor. The wiring 101 emerges from various points on the test specimen 100 and is suitable for conducting heat from the test specimen to the measurement assembly 30, thus enabling temperature measurement within the measurement assembly 30.

[0098] The measurement assembly 30 in Figure 5 includes a wiring bundle 3 guided by at least two independent wires 101, as schematically shown in Figure 6 (the wires are not explicitly shown in Figure 5). A hot crimp 4 is attached to or as part of the wiring bundle 3 as a binding means. The hot crimp 4 can be at least partially deinsulated from the wires in the wiring bundle to form good thermal conductivity contact between the wires and the hot crimp. The hot crimp 4 is preferably made of a metal with good thermal conductivity.

[0099] The temperature sensor 2 is clamped to the hot crimp 4 by the holder 1 shown in the previous figure. Therefore, the wiring bundle together with the hot crimp becomes the measuring body here. One side of the temperature sensor 2, which has a temperature sensing element or is thermally connected to a temperature sensing element, rests on the surface of the hot crimp 4.

[0100] The illustrated holder 1 is particularly suitable for measurement setups because it allows the temperature sensor 2 to make direct contact with the hot crimp 4 without any portion of the holder 1 being present between the contact surface of the temperature sensor 2 and the corresponding contact surface of the hot crimp 4.

[0101] Wiring 21 is drawn out from temperature sensor 2 in a direction approximately perpendicular to the guide direction of the wiring within wiring bundle 3.

[0102] The wiring bundled in the wiring bundle 3 is connected to the test specimen, for example, an electric motor. Heat is conducted from the test specimen to the measuring object (hot crimp 4) where the temperature drop occurs, for example, through the wiring having a metal core that is at least partially exposed by the hot crimp 4.

[0103] As can be seen, the recess 15 of the holder base 11 is molded to be shape-coupled or nearly shape-coupled to the temperature sensor 2, thereby preventing rattling.

[0104] Furthermore, the stopper 16 prevents the temperature sensor 2 from coming loose (Herausrutschen) in the insertion direction.

[0105] Furthermore, the temperature sensor 2 is secured within the recess 15 by a clamp tab 17, which generates at least one pressing force against the side of the temperature sensor 2, causing the temperature sensor 2 to be pressed against the surface or inner surface 12 of the recess 15 facing the clamp tab 17. Alternatively, additional clamp tabs 17 may be formed on the opposing surface (not shown).

[0106] The spring clamp 14 is at least partially shape-coupled to the elliptical shape of the hot crimp 4. The spring clamp 14 is small or undersized, meaning that its opening angle or radius in the untensioned state is smaller than, for example, the curvature of the side of the hot crimp 4. Tension is generated by clamping, resulting in the clamping action of the holder.

[0107] The clamping action presses the temperature sensor against the high-temperature crimping area. [Explanation of symbols]

[0108] 1 Holder (Halterung) 2. Temperature sensor 3 Wiring bundles (Leitungsbuendel) 4. Hot Crimp (Heisscrimp) 11. Holder base (Halterungsbasis) 12. Inner self (Innenseite) 13 External surface (Ausenseite) 14 Spring clamp (Federklemme) 15. Recess (Vertiefung) 16 Stopper (Anschlag) 17. Clamp tabs (Klemmlasche) 18 Oeffnung 19 Web (Steg) 21 Sensor Wiring (Sensorleitung) 30 Measuring Assembly (Messanordnung) 100 test specimens (Pruefkoerper) 101 Wiring (Leitung)

Claims

1. A measuring device for measuring the temperature of a test specimen, At least two separate, heat-conductive wirings are drawn from one test specimen and bundled together at a certain distance from the specimen by a binding means, The temperature sensor is fixed to the binding means via a clamping force using a holder. The fastening means is a separate component from the holder. Measuring device.

2. A measuring device for measuring the temperature of a test specimen, At least two separate, heat-conductive wirings are drawn from one test specimen and bundled together at a certain distance from the specimen by a binding means, The temperature sensor is fixed to the binding means via a clamping force using a holder. The means for bundling the aforementioned wiring into the aforementioned wiring bundle is a hot clamp. Measuring device.

3. Temperature measurement is performed by the temperature sensor on the binding means by bringing the temperature sensor into contact with the binding means. The measuring device according to claim 1 or 2.

4. The wiring of the temperature sensor is drawn out from the temperature sensor and the holder in a direction perpendicular to the guide direction of the wiring in the wiring bundle. The measuring device according to claim 1 or 2.

5. All of the aforementioned wiring is fixed to different positions on the test specimen. The measuring device according to claim 1 or 2.

6. The wiring is bundled together via a binding means in a certain area of ​​the wiring bundle, and the temperature sensor is pressed against the binding means by the holder. The measuring device according to claim 1 or 2.

7. The aforementioned wiring functions as a current supply unit to the test specimen. The measuring device according to claim 1 or 2.

8. The test specimen is an electric motor. The measuring device according to claim 1 or 2.

9. A holder used in the measuring apparatus according to claim 1 or 2, A holder comprising a holder base having an inner surface and an outer surface, and a spring clamp connected thereto, A recess for receiving a temperature sensor is provided on the inner surface of the holder base. Two of the spring clamps are arranged opposite each other with respect to the holder base and are suitable for generating a clamping force in the direction toward the inner surface of the holder base. Holder.

10. The recess is equipped with a stopper that prevents the temperature sensor, which is to be fitted into the recess, from coming out of the recess. The holder according to claim 9.

11. A clamp tab suitable for securing a temperature sensor to be fitted into the recess is provided. The holder according to claim 9.

12. The recess is provided with an opening that allows electrical wiring to be guided into the recess. The holder according to claim 9.

13. The recess is formed such that the temperature sensor to be fitted into it can be inserted into the recess at least partially in a shape-coupled manner. The holder according to claim 9.

14. Furthermore, the two spring clamps are positioned opposite each other with respect to the holder base and are suitable for generating a clamping force in the direction toward the inner surface of the holder base. The holder according to claim 9.

15. The spring clamp is suitable for at least partially surrounding an elliptical measuring object in order to generate a clamping action and thus secure it to the measuring object. The spring clamp makes contact with the object being measured in a wide area, shape-coupled, yet undersized manner. The holder according to claim 9.

16. The material of the spring clamp is spring-elastic under a temperature load of 100°C to 200°C. The holder according to claim 9.

17. The recess has an opening, the opening allowing the electrical wiring of the temperature sensor to be guided into the recess such that the electrical wiring of the temperature sensor is oriented perpendicular to a predetermined guide direction of the wiring in the wiring bundle. The holder according to claim 9.

18. A holder comprising a holder base having an inner surface and an outer surface, and a spring clamp connected thereto, A recess for receiving a temperature sensor is provided on the inner surface of the holder base. Two of the spring clamps are arranged opposite each other with respect to the holder base and are suitable for generating a clamping force in the direction toward the inner surface of the holder base. The holder is designed to be clamped to the wiring bundle by a spring clamp, The entire holder is a one-piece press-bent part formed from sheet metal. The holder according to claim 9.

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