TW201643398A - Sensor, driving member with sensor, driving apparatus with driving member, and evaluation method - Google Patents

Abstract

The invention provides a sensor for being built into the interior of a driving member, a driving member with a sensor, a driving apparatus with a driving member, and an evaluation method for signals of a sensor. The purpose is to improve detection sensitivity of liquid entering the driving member. The solution of the invention provides that: the sensor is designed as being built into the interior of the driving member, and the sensor has a conductive channel for capacitance construction and an insulating material. The insulating material has the conductive channel. The conductive channel is set on a detector side of the sensor. The detector at least in part defines an inner chamber of the driving member.

Description

Sensor, drive member with sensor, drive device with drive member, and evaluation method Field of invention

The present invention relates to a sensor for loading the inside of a driving member, a driving member having a sensor, a driving device having a driving member, and an evaluation of a signal for a sensor Method.

Background of the invention

Several prior art devices and methods for detecting liquid flowing out of a particular region of a drive unit have been disclosed in the prior art. EP 1 562 031 A2 discloses a leakage discharge channel for liquid flowing out of a motor. A sensor is disposed in the leakage discharge passage. When the liquid flows from the motor to the leak discharge passage, the detector side of the sensor is wetted, and the liquid wetting can be detected by evaluating a sensor signal.

Summary of invention

It is an object of the present invention to provide an improved sensor or an improved evaluation method for signals originating from the sensor. The purpose is especially that compared to traditional solutions, to the extent possible Simple way to improve detection reliability.

The solution to achieve the above object of the present invention is a sensor for loading the inside of a driving member as claimed in claim 1, and an evaluation method for a sensor for a sensor as a parallel request.

According to an aspect of the present invention, a sensor for mounting an interior of a driving member has a conductive path for constructing a capacitor and an insulating material for accommodating the conductive path, wherein the conductive path is Provided on a detector side of the sensor, the detector side at least partially defines an interior cavity of the drive member in the loaded state.

In accordance with another aspect of the present invention, an evaluation method for a typical sensor of the present invention is provided, including measuring the capacitance of the conductive path and comparing the measured capacitance to a predetermined one. Values are compared.

A typical sensor can be loaded or loaded into the interior of a drive member. In the case of a typical sensor, the detector side of the sensor at least partially defines an interior cavity of the drive member. Typically, the conductive path on the detector side of the sensor for constructing the capacitor is a component of the defining portion of the inner cavity of the drive member. In some embodiments, the electrically conductive pathway is embedded in the insulative material, wherein the electrically conductive pathway is typically insulated from the inner cavity of the drive member through the insulative material. In other embodiments, the conductive path is exposed or has its own insulation that is independent of the insulating material. However, there are usually no other layers between the detector side of the sensor and the inner cavity of the drive member.

If there is leakage in the inner cavity of the driving member, enter the inside The liquid of the chamber, such as oil, is in some exemplary embodiments where the detector side of the sensor is directly wetted. The concept of "wetting" is not to be understood as a liquid distributed over the entire surface of the detector side. Specifically, the "wetting" concept also includes the presence of small amounts of liquid, such as fewer oil droplets from 100 [mu]L or from 50 [mu]L, only on one partition of the detector side of the sensor.

For example, in the case of a liquid to be detected that wets the detector side of the sensor as a leak at the time of leakage, the relative dielectric constant of the liquid is usually in the inner cavity of the driving member under normal working conditions. The relative dielectric constant of the medium is different. Under normal operating conditions, this medium is typically air. In the case where the liquid wets the detector side of the sensor, the dielectric constant of the half space abutting the conductive path (which is housed in the insulating material of the sensor) changes. Therefore, the capacitance of the conductive path changes. The measurement of the capacitance, or the measurement of the change in the capacitance, is typically used to detect liquid on the detector side of the sensor.

Several exemplary embodiments have the advantage that liquid entering the interior of the drive member can be detected directly in the lumen itself. It is generally undesirable for liquid to enter the interior of the drive member, i.e., liquid detection by the sensor is typically leak detection.

According to the invention, there is generally no leakage discharge channel, for example for arranging the sensor, the inner chamber or the drive member or the drive device, in particular a leak-free discharge channel. In the case where the liquid, particularly the liquid leakage, enters the interior of the drive member, the detector side of the sensor is directly wetted without the prior discharge of the liquid through a leak discharge passage.

In a leaky discharge channel provided in a conventional manner, there may be no The method may not properly detect the accidental entry or exit of the liquid, for example in the presence of only a small amount of lubricant. The detector side of the sensor of the present invention typically at least partially defines the interior of the drive member. By directly detecting the liquid in the inner cavity of the driving member, the detection accuracy, the response time when leaking, or the detection sensitivity can be improved.

The liquid to be detected may also be an external liquid that enters the interior of the drive member due to external environmental conditions. Such external liquid is typically water and/or is a cleaning agent that overcomes such seals that may be provided on the drive member in an undesired manner during the cleaning process.

In several embodiments, the insulating material is bendable. In other embodiments, a rigid insulating material is provided. The insulating material can be configured as a flat flexible printed circuit board, such as a flat flexible printed circuit board configured from a polyimide film material or another plastic. The conductive path for constructing the capacitor can be embedded in the material of the printed circuit board. The flexibility of the insulating material helps to match the sensor to the contour of the lumen of the drive member.

In some embodiments, the sensor includes a pin member having an insulating material including a conductive path disposed on a tip end of the pin member. A typical embodiment of the pin includes a number of bolts or threaded screws. The pin member is typically fed into an opening of a drive member, such as a bore that can be fed into the drive member or an internally threaded opening.

In several embodiments, the insulating material of the sensor is configured as a ring. The conductive path can be configured on one of the sides of the ring member, and the conductive path is generally configured over the entire circumference of one side of the ring member on. This side is usually the inner side of the ring, which faces the inner cavity in the loaded state. In other embodiments, the electrically conductive pathway is configured on an axial side of the ring. In the loaded state, the ring member can be disposed on one side of the drive member to achieve a sealing function with respect to the inner cavity of the drive member. The ring can partially or completely assume this sealing function.

In several embodiments, the sensor includes an evaluation electronics. The evaluation electronics can be configured in the interior of the sensor, such as in the interior of the insulating material. Alternatively, the evaluation electronics can be directly abutted to the insulating material. The evaluation electronics can be configured, for example, on a side opposite the detector side of the sensor.

In the typical evaluation method, the capacitance of the conductive path is measured and the measured capacitance is compared to a predetermined value.

A typical evaluation electronics has a capacitance measurement function for the capacitance of the conductive path of the sensor. The evaluation electronics can, for example, be configured to measure the capacitance of the conductive path and compare the measured capacitance to a predetermined value.

In the case of a typical evaluation electronics or typical evaluation method, the preset value is a predetermined capacitance or associated with a predetermined capacitance. The preset value can be pre-defined or set in the working state. In other embodiments, the rate of change of the capacitance is compared to a threshold. This comparison can be repeated continuously, or over time, at defined or definable time intervals.

The preset value is typically associated with a nominal capacitance in a state where the detector side of the sensor is not wetted by the liquid. The preset value can also be A nominal capacitance associated with the detector side of the sensor being wetted by a particular liquid, wherein the particular liquid is at least partially replaced by the latter as the other liquid enters the interior of the drive member. In particular, the specific liquid has a different relative permittivity with the other liquid, and when one or the other of the liquids wets the conductive path, the conductive path of the detector side of the sensor is caused. This situation occurs with different capacitances.

In several embodiments of a typical evaluation method or in several embodiments of a typical evaluation electronic device, measuring the capacitance of the conductive path includes applying a measurement signal to the conductive path. To measure the capacitance of the conductive path, a measured voltage is typically applied to the conductive path. When measuring, the capacitance is typically associated with a reference capacitor and the measured ratio is converted to a measured voltage.

A typical evaluation electronics can have a capacitance-to-voltage converter for the capacitance measurement function. The capacitance of the conductive path is typically associated with the reference capacitance.

In some embodiments, the evaluation electronics has, as an alternative, a constant current source, a time measurement circuit, and a voltage measurement circuit. A number of charges are typically input to the conductive path by current from the constant current source and the time elapsed until a defined voltage is reached is measured. The capacitance of the conductive path is typically calculated based on the measured time, the defined voltage, and the current strength of the current from the constant current source.

Repeated in a number of typical evaluation methods or typical evaluation electronics, either continuously or over time at defined or definable intervals Implement the comparison. When making a comparison, it is generally determined the extent to which the measured value deviates upward or downward from the comparison value. The comparison value typically includes a comparison value field that is structured to surround an intermediate comparison value. If it is determined during the comparison that the measured capacitance is not within the comparison value field, a corresponding signal, such as a warning signal, is output.

In several embodiments of a typical sensor, the electrically conductive pathway includes an interdigit structure having a plurality of sub-conducting vias that at least partially bite into each other. In other words: the conductive path can have a plurality of sub-conductive paths that serve as a single electrode, respectively. The plurality of sub-conductive paths typically have two sub-conducting paths that can be configured as a first electrode or a second electrode. Each of the electrodes can be electrically coupled to an evaluation unit. In other embodiments, other electrodes are provided, such as for achieving a spatial resolution of the surface that is wetted by the liquid leakage.

In several embodiments, a drive member is provided with one of the typical sensors described above. In some typical embodiments, the drive member is a transmission or an adapter plate. Typical adapter plates are used in electric motor-transmission combinations or in conventional device-transmission combinations. In a typical electric motor-conventional device combination, a shaft system is drawn from the electric motor and the adapter plate includes a through hole for the shaft to pass through. In some typical embodiments, the adapter plate includes a first fastening surface for mounting on a driven side of the electric motor. A number of typical adapter plates include a second fastening surface for mounting on the transmission.

In some embodiments, the sensor is disposed directly on an inner peripheral surface of the drive member. The sensor can be used with the evaluation electronics It is directly disposed on the inner peripheral surface of the drive member. The inner peripheral surface of the drive member is typically a face that is itself a component of the defining member of the inner cavity of the drive member. The inner circumferential surface can be, for example, an inner cylindrical surface or an inner cylindrical surface of the drive member, in particular an inner cylindrical surface of the adapter plate. The inner peripheral surface is typically used to form a lumen for a shaft to pass through. The detector side of the sensor, along with the inner peripheral surface, generally defines at least a portion of the inner cavity through which a shaft passes. The signal originating from the sensor or the signal from an evaluation electronic device that may be a component of the sensor may be drawn from the lumen in a wired manner. For example, a suitable lead member can be provided. The lead member is typically disposed in a bore of a fastening member that is externally inserted into a side opening of the drive member.

In some embodiments, the sensor is configured and/or disposed on the drive member or in the drive member such that the liquid at least partially passes the liquid as it enters the inner cavity The detector side is wetted. In the case of a rotary shaft, the liquid entering the interior, in particular the lubricant, is generally radially distributed in the inner cavity of the drive member during operation. The function of the sensor is generally independent of the loading position with respect to the orientation of the drive member, ie irrespective of whether the sensor is placed in the upper, lower or side portion of the drive member in the loaded state. .

In some embodiments, for attachment, the drive member is configured to abut a transmission region, wherein the transmission region has a transmission lumen that is isolated from the interior of the drive member. In the operating state, a lubricant is usually provided in the interior of the transmission.

In some embodiments, a drive device is provided having a typical drive member of the drive member, and a fastening or attachment thereto The drive on the drive member. The transmission of the drive device typically has a transmission region, wherein the transmission region has a transmission interior that is isolated from the interior of the drive member. A lubricant is typically provided in the interior of the transmission. The lubricant can be oil and the interior of the transmission can be filled with the oil.

In some embodiments, the drive device has an electric motor, wherein the drive member is disposed between the electric motor and the transmission. A typical electric motor system of several embodiments is a synchronous motor, an asynchronous motor or a servo motor.

The transmission is usually configured as a planetary transmission, a harmonic transmission, a coaxial transmission or a linear transmission, or may be configured as a hydrostatic conventional device or a fluid power transmission device. The transmission region typically has an inlet for a shaft that passes through the drive member.

A typical evaluation method can be implemented in an evaluation electronics provided on the sensor or in the sensor. As an alternative, a typical evaluation method can also be implemented in an external evaluation device.

In several embodiments, the method further comprises, by the comparing, classifying the type of liquid that at least partially wets the detector side of the sensor. For example, it is possible to determine in the comparison whether the measured capacitance is greater than or less than the comparison value, or whether it exceeds or falls below the limit of the comparison value field, thereby implementing the classification. This allows a rough identification of the type of liquid, such as determining whether it is a polar liquid or a non-polar liquid. In this classification, for example, it is also possible to compare several values or sequences of values more precisely. The type of liquid can be identified more finely, such as the liquid being detected The type or type of lubricant that can be classified.

10‧‧‧ Sensors

11‧‧‧Detector side

20‧‧‧Insulation materials

21a, 21b‧‧‧child conduction path

30‧‧‧ Pins

31‧‧‧ tip

32‧‧‧ pole

40‧‧‧ Rings

41‧‧‧ inside of the ring

100‧‧‧ drive components

101‧‧‧Terminal board

110‧‧‧Defined parts

130‧‧‧ openings

150‧‧‧Transmission

151‧‧‧Transmission area

155‧‧‧Transmission driven shaft

160‧‧‧Electric motor

165‧‧‧Axis

Further advantages and features of the preferred embodiments of the present invention are described below with reference to the accompanying drawings.

In the drawings: FIG. 1 is an exploded perspective view of a driving device having a sensor according to a first exemplary embodiment of the present invention; FIG. 2 is a view showing a sense of FIG. 1 according to the first exemplary embodiment. An enlarged view of the components of the detector; FIG. 3 is a plan view of the detector side of the sensor according to the first exemplary embodiment; and FIG. 4 is a second exemplary embodiment of the present invention having a sense An exploded perspective view of the drive of the detector.

Detailed description of the preferred embodiment

The present invention is not limited to the embodiments, and the scope of the present invention is determined by the scope of the claims.

1 is an exploded perspective view of a drive device having a sensor, in accordance with an exemplary embodiment.

1 shows a transmission 150 that, together with a transmission driven shaft 155 extending from the transmission 150, constitutes a transmission region 151. The transmission region 151 is configured as a transmission block and has, for example, a planetary transmission or a harmonic transmission.

To couple the transmission 150 to an electric motor 160 including a shaft 165 for driving the transmission 150, a drive member 100 configured as an adapter plate 101 is provided.

The side of the adapter plate 101 facing the electric motor 160 has a number of fastening schemes that correspond to complementary fastening schemes of the electric motor 160. Similarly, the side of the adapter plate 101 facing the transmission 150 has a number of fastening schemes that correspond to complementary fastening schemes of the transmission 150. In the tightened state, the shaft 165 of the electric motor 160 passes through the interior of the adapter plate 101. The shaft body 165 is inserted into the transmission 150 and driven.

The interior of the transmission is typically filled with a lubricant for lubrication of the transmission, and the flow from the interior of the transmission generally indicates a malfunction of the transmission. Early detection of such leaks helps to extend the life of the transmission and improve the fail-safeness of the transmission.

The drive is usually affected by the process to which it is applied during operation. Such process effects can be, for example, substances that contaminate the drive. When the dirt is removed during the cleaning of the drive device, the cleaning fluid or the like may enter the inner cavity of the transmission 150 and cause corrosion. Early detection of such liquid infiltration also helps to extend the life of the transmission and improve the fail-safe nature of the transmission.

In order to clamp the transmission 150 in the adapter plate 101, an opening 130 for internal threading for feeding a pin member 30 is provided in the adapter plate 101. The pin member 30 includes a sensor 10, and in the illustrated embodiment, the pin member is configured as a threaded screw.

2 is an enlarged perspective view of the pin member 30. For the sake of simplicity, in this The stem portion 32 of the pin member is shown in a non-threaded manner in the drawings. In other embodiments, the pin member includes a bayonet connection or another fastening device that cooperates with an opening of the adapter plate having a corresponding configuration to secure the pin member to the adapter plate in.

On the tip end 31 on the front end of the stem portion 32, the pin member 30 has a sensor 10, which will be described in more detail below in connection with FIG. The tip end 31 of the pin member 30 constitutes the sensor 10. In the illustrated embodiment, the detector side 11 of the sensor 10 is exposed on the tip 31 and is a component of the surface of the tip 31 of the pin.

3 is a top plan view of the detector side 11 of the sensor 10 in accordance with the embodiment of FIGS. 1 and 2. The sensor 10 has an insulating material 20 configured in a flat, round flexible substrate composed of a polyimide material. The thickness of the flexible substrate perpendicular to its maximum extent is, for example, less than 1.5 mm, or less than 1 mm, or less than 0.5 mm.

The insulating material 20 houses a conductive via having two sub-conducting vias 21a, 21b. The sub-conducting vias 21a, 21b are configured in the interior of the insulating material 20 and are entirely covered by the insulating material 20.

The thickness of the sub-conductive paths 21a, 21b may be, for example, less than 1 mm, or less than 0.5 mm, or less than 0.25 mm. On the side for fastening the sensor 10 to the tip end 31 of the pin member 30, and on the detector side 11 shown in Fig. 3, the sub-conducting paths 21a, 21b are thin layers of the insulating material 20. cover. The thickness of the layer covering the sub-conductive paths 21a, 21b in this direction is, for example, less than 0.5 mm, or less than 0.3 mm, or less than 0.1 mm. The sub-conducting paths 21a, 21b are not exposed.

Each of the sub-conductive paths 21a, 21b serves as an electrode, wherein the sub-conducting paths 21a, 21b are insulated from each other. Each of the electrodes has an arcuate region located within the perimeter of the insulating material 20. Starting from each of the arcuate regions, a plurality of parallel conductive path regions extend toward opposite arcuate regions of the other electrode without reaching the opposing arcuate regions. These parallel conductive via regions are only electrically conductively connected to the arcuate regions from which they extend. The parallel conductive path regions extend and interlock with each other in opposite and mutually offset manners without contacting each other. This produces a structure between digits.

An evaluation device (not shown) is integrated in the sensor 10 in the embodiment shown in FIGS. 1 to 3. The evaluation electronic device is configured on the insulating material 20 on a side opposite to the detector side 11 and with a conductive path 21a serving as a first electrode and a second conductive path 21b serving as a second electrode Electrical connection.

In some exemplary embodiments, a (not shown) bore is provided in the pin member 30 through which an evaluation signal is drawn from the region of the drive member 100 in a wired manner from the evaluation electronics.

The evaluation electronics are designed to perform an evaluation method for signals originating from the sub-conducting paths, ie, from the first electrode and the second electrode. To this end, the capacitance between the sub-conducting paths is measured and the measured capacitance is typically compared to a comparison value. In several embodiments, the evaluation electronics have a capacitance-to-voltage conversion circuit. The capacitance-voltage conversion circuit measures the capacitance of the conductive path by a reference capacitor that may be integrated in the capacitance-voltage conversion circuit or externally.

Typical values for the reference capacitor are 5pF to 1nF. The capacitance between the sub-conductive paths can be, for example, a number of picofarads, such as 0.5 pF, and a few nanofarads, such as 5 nF. The capacitance-voltage conversion circuit is operated, for example, by a DC voltage of a few volts (for example, 3 to 12 V), and the capacitance-voltage conversion circuit outputs, for example, an analog voltage of 1 to 5 V as a measured variable. By means of such measured variables, the capacitance between the sub-conductive paths measured by the capacitance-voltage conversion circuit can be derived. The capacitance-voltage conversion circuit can be an analog circuit, or can be a digital circuit that outputs a digital signal, and the digital signal can calculate the capacitance between the sub-conductive paths measured by the capacitance-voltage conversion circuit.

After the capacitance is measured, that is, the capacitance measurement of the capacitance-voltage conversion circuit is measured, the evaluation electronics then compares the measured capacitance with a predetermined comparison value. In some typical embodiments, the comparison value corresponds to a range of values within which the detector side that is not wetted by one of the sensors is the starting point. The evaluation electronics output an evaluation signal for the comparison if the upper or lower range limits are exceeded. The evaluation electronics can also be designed to output an evaluation signal at each comparison, which is normally encoded (ie, without exceeding the upper range limit or below the lower range limit) ) indicates a normal state. The code of the evaluation signal indicates an error state if the upper value range limit is exceeded or is below the lower value field limit.

The capacitance is typically measured at defined time intervals, such as every 5 seconds or every 10 seconds. The measurement can also be carried out continuously or dynamically adjusted for the time intervals as the case may be. You can also choose not to Even time interval.

In the present embodiment, the measured conductive path capacitance is also compared to the comparison value at defined time intervals to perform a corresponding comparison in the evaluation circuit for each measurement.

In these exemplary embodiments, the capacitance between the sub-conductive paths depends on the area of the conductive path and the total dielectric, and the total dielectric affects the capacitance of the electric field between the sub-conducting paths. In one aspect, the insulating material has a proportion of total dielectric, that is, the capacitance between the sub-conductive paths depends, on the one hand, on the relative dielectric constant of the insulating material.

The sub-conducting paths 21a, 21b of the sensor 10 are only covered by a relatively thin layer of the insulating material 20 on the detector side 11, so that the medium on the other side of the insulating material 20 on the detecting side 11 is also This capacitor has an effect. In the case where electric charges are present in the sub-conducting paths 21a, 21b, the electric field lines extend at least partially through the half space on the other side of the insulating material 20. Wherein, in the case where the medium in the half space is sufficiently close to the sub-conducting paths 21a, 21b, the medium exerts a measurable influence on the capacitance between the sub-conducting paths 21a, 21b.

In the embodiment shown in Figures 1 to 3, the pin member 30 is fed into the opening 130 in such a manner that the tip 31 is forward. Therefore, in the loaded state of the sensor 10, the detector side 11 of the sensor 10 is a component of the defining member 110 of the inner cavity of the driving member 100 (i.e., the adapter plate 101).

In the present embodiment, the attachment plate 101 abuts against the transmission region 151 in the loaded state. In the event of a seal failure, the lubricant acts undesirably as a leak from the interior of the transmission chamber of the transmission region 151 Out. These leaks then enter the adjacent lumen of the adapter plate 101. In a typical operating state, the shaft body 165 that passes through the adapter plate 101 rotates. Therefore, the outflowing lubricant is distributed in the inner cavity. Specifically, the lubricant is distributed on the inner circumferential surface of the inner cavity, and the inner circumferential surface constitutes the defining member 110 of the inner cavity.

In the loaded state, the detector side 11 of the sensor is a component of the defining member 110 of the inner cavity, that is, in the present embodiment, the detector side is a component of the inner peripheral surface. In this case, the lubricant entering the interior of the adapter plate 101 is capable of at least partially wetting the detector side 11 of the sensor. The incoming lubricant is detected in the interior of the drive member itself. In the case where the amount of lubricant is small, wetting has caused a measurable change in capacitance between the child conductive paths 21a, 21b of the sensor 10. For example, a quantity of oil of 0.1 ml or less already causes a measurable change in capacitance.

4 is an exploded perspective view of a driving device having a sensor in accordance with an exemplary embodiment of the present invention. In the embodiment shown in FIGS. 1 to 3 and the embodiment shown in FIG. 4, the same or equivalent components are denoted by the same reference numerals, and the description thereof will not be repeated here.

According to the embodiment shown in Fig. 4, the sensor 10 is not disposed on a pin member that is fed into the opening in the adapter plate 101. Specifically, the sensor 10 is disposed on one side of the ring member 40, that is, the inner side 41, wherein in the loaded state, the ring member constitutes the inner cavity of the driving member 100 (here, the adapter plate 101). At least one component of the defining member 110. In the embodiment shown in FIG. 4, the sensor 10 is configured on a portion of the inner side 41 of the ring member 40. In other implementations In this manner, the sensor 10 can also be configured such that the sensor covers a substantial portion of the inner side 41 of the ring member 40 or surrounds the entire periphery of the inner side 41 of the replacement member 40.

In the embodiment shown in FIG. 4, the detector side 11 of the sensor 10 corresponds to the inner side 41 of the ring member 40, which in the loaded state abuts directly to the transmission 150. In the event that the lubricant undesirably flows from the interior of the transmission into the interior 110 of the adapter plate 101, at least a portion of the surface of the ring, i.e., a portion of the detector side 11 of the sensor 10, is also wetted. . The liquid entering the inner cavity 110 of the drive member 110 can be reliably and sensitively detected based on the resulting change in capacitance. For this reason, reference is also made to the description of the capacitance measurement of other exemplary embodiments in the present application.

10‧‧‧ Sensors

30‧‧‧ Pins

31‧‧‧ tip

100‧‧‧ drive components

101‧‧‧Terminal board

110‧‧‧Defined parts

130‧‧‧ openings

150‧‧‧Transmission

151‧‧‧Transmission area

155‧‧‧Transmission driven shaft

160‧‧‧Electric motor

165‧‧‧Axis

Claims (15)

An internal sensor for mounting a drive member, in particular an electric motor-transmission combination, having a conductive path for constructing a capacitor, and an insulating material for receiving the conductive path, wherein The conductive path is disposed on a detector side of the sensor. In the loaded state, the detector side at least partially defines an inner cavity of the driving member. The sensor of claim 1, wherein the insulating material is bendable. A sensor according to any one of the preceding claims, wherein the sensor comprises a pin member having an insulating material comprising the conductive path at a tip end of the pin member. A sensor according to any one of the preceding claims, wherein the insulating material is configured as a ring. A sensor as claimed in any one of the preceding claims, wherein the sensor comprises an evaluation electronics. A sensor according to any one of the preceding claims, wherein the conductive path is an inter-digit structure having a plurality of sub-conductive paths that at least partially bite into each other. A drive member, in particular an adapter plate, having a sensor as in one of the preceding claims. The drive member of claim 7, wherein the sensor is disposed directly on an inner peripheral surface of the drive member. The driving member of claim 7 or 8, wherein the sensor is configured and/or disposed such that the liquid is at least partially flanked by the detector when the liquid enters the inner cavity wet. A drive member according to any one of claims 7 to 9, wherein for attachment, the drive member is configured to abut against a transmission region, wherein the transmission region has an insulation from the interior of the drive member The inner cavity of the transmission. A drive device having a drive member as one of claims 7 to 10 and a transmission secured to the drive member. The drive device of claim 11 has an electric motor, wherein the drive member is disposed between the electric motor and the transmission. A method for evaluating a signal of a sensor such as one of claims 1 to 6 or a sensor for a sensor integrated into a driving member such as one of claims 7 to 10, including: The capacitance of the conductive path is measured; and the measured capacitance is compared to a predetermined comparison value. The method of claim 13 further comprising: classifying, by the comparison, a type of liquid that at least partially wets the detector side of the sensor. A sensor according to any one of claims 1 to 6, or a driving member according to one of claims 7 to 10, or a driving device according to one of claims 11 to 12, respectively, having an evaluation electron The device is arranged to implement an evaluation method as one of claims 12 to 13.