WO2012013350A1

WO2012013350A1 - Portable diagnostic measuring device

Info

Publication number: WO2012013350A1
Application number: PCT/EP2011/003793
Authority: WO
Inventors: Yoon Ok Kim; Ok Kyung Cho
Original assignee: Flore, Ingo
Priority date: 2010-07-28
Filing date: 2011-07-28
Publication date: 2012-02-02
Also published as: DE102010032531A1; TW201208646A; TWI527562B

Abstract

The invention relates to a portable diagnostic measuring device (100) for non-invasive detection of at least one physiological parameter of the human body, wherein the device (100) has an integrated sensor (108; 302; 304; 306; 308; 310) for detection of the parameter, an integrated evaluation unit (500) for evaluating the parameter and supplying evaluation data, and an integrated display unit (110) for displaying the evaluation data, wherein the device (100) has a base (102) and a lid (104), wherein the lid (104) is arranged movably on the base (102) for transfer between an open position and a closure position, wherein the base (102) and/or the lid (104) has at least one contact surface (106) for supporting a human finger in the open position of the lid (104), wherein the sensor is arranged on the contact surface (106), and wherein the device (100) is designed such that the finger can be fixed relative to the base (102) and to the lid (104) in the closure position of the lid (104), and a detection of the physiological parameter takes place in the closure position.

Description

The invention relates to a portable diagnostic measuring device for the noninvasive detection of at least one physiological parameter of the human body.

The population is becoming increasingly receptive to regular self-monitoring of their own health in order to prevent themselves from becoming clear about their own state of health. For years, for example, blood pressure measuring devices, corresponding body temperature measuring devices (fever thermometers) as well as, for example, so-called body fat scales, by means of which the body fat percentage can be determined, are common. To a great extent, it is preferred that appropriate measuring devices are portable, so that they can be stored at home without much space and also handled easily.

A corresponding measuring device is known, for example, from DE 601 08 673 T2, which describes a measuring device for a variable of a living body. For example, this is a body fat monitor in which various measuring electrodes are provided, wherein a user must apply his thumbs to corresponding voltage measuring electrodes on the front of the meter body and also his index fingers on appropriate

CONFIRMATION COPY Power supply electrodes must be placed, which are located on the back of the meter body.

In contrast, the object of the invention is to provide an improved portable diagnostic measuring device which makes it possible, in a non-invasive manner, to detect at least one physiological parameter of the human body.

The object underlying the invention is achieved with the features of the independent claim. Preferred embodiments of the invention are indicated in the dependent claims. The invention relates to a portable diagnostic measuring device for non-invasive detection of at least one physiological parameter of the human body, the device comprising an integrated sensor for detecting the parameter, an integrated evaluation unit for evaluating the parameter and providing evaluation data, and an integrated display unit for display has the evaluation data. Furthermore, the device has a base and a lid, wherein the lid is movably disposed on the base for transfer between an open position and a closed position, wherein the base and / or the lid at least one support surface for supporting a human finger in the opening position of the lid exhibit. In this case, the sensor is arranged on the support surface, wherein the device is designed so that the finger in the closed position of the lid between the base and the lid is fixed and a detection of the physiological parameter in the closed position.

Embodiments of the invention have the advantage that due to the fixation of the finger relative to the base and lid, measurement data acquisition can be carried out in a reproducible manner. For this purpose, preferably, the support surface on a stop, wherein the user uses his finger on the support surface to the stop, so that after closing the lid, the fixation of the finger is guaranteed at least in the direction of the stop. Preferably, the support surface is a recess, so that after inserting the finger of the user in this recess also a fixation of the finger is also ensured perpendicular to the expansion surface of the recess. This eliminates the need for a cumbersome searching the ideal measuring position in which the finger must be placed on the sensor. On the other hand, it is ensured that with each measurement, the finger comes to rest in exactly the same place in the recess, so that corresponding measurements for a given person can always be carried out reproducibly with respect to the same finger position. In this way, a development of the physiological parameter can be detected in a reliable manner for at least one person in the course of a sequence of different measurements carried out in chronological succession.

According to one embodiment of the invention, the recess is an at least semi-cylindrical, parallel to the surface of the base extending elongated recess. This recess is thus designed substantially opposite to the shape of a finger, so that the finger can be optimally fixed in the recess. Furthermore, this simplifies the handling of the device considerably, since, for example, the device can be placed on a flat surface, for example a table surface, only the finger has to be inserted into the recess and the cover then has to be closed. A cumbersome holding the device by means of two hands and a concomitant fluctuating physical pressure on the sensor possibly under balancing attitude of the device is also avoided.

It should be noted that the recess may also take other forms, e.g. an elliptical or ellipsoidal cross-section.

According to a further embodiment of the invention, the lid has a first hinge, wherein the lid is movably arranged via the first hinge on the base for transfer between the open position and the closed position. In addition, it is still possible that the lid further comprises a second hinge, wherein the first hinge on the second hinge is arranged and the pivot axes of the first and second hinge parallel to each other. This has the advantage that is guaranteed at any time with different finger diameters, that when closing the lid, the finger is fixed relative to the base and the lid. Furthermore, this is a simple mechanical embodiment of the connection of the lid to the base, whereby the risk of malfunction, for example due to tilting of the lid relative to the base, is avoided. This increases the longevity of the device.

It should be noted, however, that various other ways exist to attach the lid to the base and to arrange movable relative to the base. For example, a guide in the form of an axis could be provided perpendicular to the surface of the base, wherein the lid along this guide can be moved perpendicular to the base. Conceivable here would be in particular a telescopic guide of the lid to the base. Hinges can also be single or double hinges (two hinges in series and linked) with or without damping. The hinges or, in general, the fasteners between the lid and the base may also be e.g. Have spring elements and / or locking elements to ensure that relative positions between the base and lid can be releasably fixed. A particularly preferred embodiment is to connect the lid and the base together so that transfer of the lid can automatically drive automatically slowed automatically moved back into the closed position in the open position of the lid. This is particularly relevant against the background that the device can be comfortably operated by a single person: The person opens the lid, puts at least one finger of one hand on the support surface with the sensor and waits while releasing the lid this automatically moves to the closed position and fixes the fingers. Now, a measuring operation by means of the device is possible in a reproducible manner. After closing the lid, the measuring process can be started automatically.

According to a further embodiment of the invention, the display unit is arranged on the side facing away from the base of the lid. This has the advantage that a user can read the evaluation data in an optimal way after closing the lid. In addition, if the display unit is a touchscreen, the user can also switch between the display of various measurement parameters by touching the screen during the actual measurement process and, if necessary, also determine the type of physiological parameters which, in the case of various measuring sensors, include his body are captured.

Such parameters may include, for example, electrocardiogram (ECG) data, temperature data, blood pressure data, blood flow data, or data relating to the oxygen content of the blood and / or oxygen consumption in the tissue. Furthermore, glucose measurements can be made.

According to a further embodiment of the invention, the base has a battery receptacle for powering the device. This has the advantage that due to the usually high weight of batteries, the center of gravity of the device is in the base, so that the base can be handled in an optimal manner on a flat surface (again, for example, a table surface), without any unwanted falling over of the device can take place. The battery can be charged wirelessly (e.g., inductively) or wired.

According to a further embodiment of the invention, the device has an analog and a digital electronic part, wherein the analog electronic part in the base and the digital electronic part is arranged in the lid or alternatively the analog electronic part in the lid and the digital electronic part is arranged in the base. Due to the spatial separation of the analog and digital part so highly sensitive measurements of physiological parameters of the human body can be performed without the risk that, especially in the analog part of the measurement errors due to the digital signal processing or data processing takes place. Overall, the quality of the measured data increases and the sensitivity of the device to interference is significantly reduced. According to another embodiment of the invention, the device further comprises a communication interface. By way of example, the communication interface may be a near-field communication interface, for example a Bluetooth or infrared interface, or a USB interface. Such an interface can be used to transmit the acquired measurement data to external devices. For example, the device can be coupled via a USB interface with a home computer, in which a corresponding evaluation software is loaded, so that a patient is able to make elaborate evaluations of the physiological data. In addition, it is also possible, for example using the Bluetooth interface, to transmit the data using a coupled mobile telephone to an external service provider, for example a healthcare provider (eg by UMTS, GSM, LTE or WIBRO). This could then perform a data analysis in a professional manner using the measured data, for example.

Moreover, a GPS function can be integrated in the communication unit. This allows e.g. in a medical emergency situation, to communicate the acquired data together with the position of the device and therewith the position of the user to alert accordingly an ambulance.

According to a further embodiment of the invention, the device further comprises an opaque shielding of the recess for preventing the incidence of light in the recess in the closed position of the lid with a finger inserted. Such shielding of the recess has the advantage that, especially in the case of optical measurements, these measurements are not disturbed by light incident from the outside. This is particularly relevant for measurements that make very sensitive in certain wavelength ranges of natural light, a detection of physiological parameters of the human body. For example, pulse oximetric diagnoses can be carried out here, wherein a corresponding sensor unit typically has an optical measuring unit by means of two light sources, the visible or infrared light being different Radiate wavelengths into the body tissue. Light scattered by the body tissue can be detected by means of appropriate light sensors, for example photodiodes, the intensity of the means of the light sensor detecting scattered light allowing conclusions to be drawn about the oxygen content of the blood. It should be noted here that as sensors a variety of types of sensors can be used. In addition to individual photodiodes and electrodes, this can also include entire sensor arrays, which enable a spatial and / or time-resolved measurement of physiological parameters. As a result, dynamic processes such as ion dynamics (eg information about the Na / K pump) can be easily detected metrologically.

As already mentioned, sensor elements can be present both in the cover and in the base and cooperate in this way to enable measurement data acquisition.

According to one embodiment of the invention, the shield is breathable. A breathable shield has the advantage that it prevents unwanted sweating of the finger when it is in the recess. This is particularly relevant against the background that a formation of a moisture film on the skin surface due to sweating could lead to an unwanted change in the measurement parameters, which in turn would lead to non-reproducible measurement results.

According to a further embodiment of the invention, the shield is a sealing lip. Alternatively or additionally, it is also possible that the shield is formed by projecting from the base and / or the lid bristles. For example, the sealing lip made of elastane. According to a further embodiment of the invention, the device further has connections for external ECG electrodes and / or external optical measuring sensors. External ECG electrodes are required if ECG detection, eg due to a particular physiology of the user, is not possible from hand to hand via the sensors integrated into the support surfaces. Preferably, the device according to the invention comprises bearing surfaces for supporting two fingers, namely a finger of the right and a finger of the left hand of a user. Thus, appropriate measurements can be made on the fingers of both hands. In particular, a hand-to-hand measurement of ECG signals is possible.

The device preferably has as integrated sensors:

at least one light emitter for irradiating the body tissue of the resting finger, and at least one photodetector for detecting the radiation scattered and / or transmitted by the body tissue, and

- Electrodes for the detection of electrocardiogram and / or

Bioimpedance signals, and

a temperature or heat sensor.

The combination of these different measuring modalities in the device according to the invention enables a comprehensive analysis of the health status of the user. Further details on the detection and evaluation of the sensor signals can be found in the publications WO 2007/017263 A2, WO 2007/017266 A2, WO 2007/028570 A2, WO 2008/061788 A1, WO 2009/033624 A1, WO 2009/033625 A1 and WO 2010 / 099969 A1. Particularly advantageous is the inventive combination of the various measuring methods, namely the oximetry, the ECG measurement, the Temperaturbzw. Heat measurement and possibly the bioelectrical impedance measurement. By means of the evaluation unit of the device, all measurement signals can be evaluated and combined by a suitable algorithm in order to examine the metabolism of the user of the device. By combining the different measurement modalities, a high degree of effectiveness and reliability in the detection of pathological changes is achieved. All parameters can be advantageously combined into a global index, which is easy to interpret for the user and gives him a direct and well-founded indication of his general state of health. The combination of the different measurement modalities, which may be combined in the device according to the invention, is furthermore advantageous because, as a result, as in detail in the cited references described, a non-invasive indirect measurement of the glucose concentration or the blood glucose level is possible.

According to a further preferred embodiment of the invention, the at least one support surface is associated with a pressure sensor which detects the contact pressure of the finger. The contact pressure of the finger affects the signals detected by the integrated sensors. The pressure sensor can be used to ensure that the user applies the correct touch pressure with his finger. If the contact pressure is outside a tolerance interval, the device may e.g. to issue a corresponding warning signal. Alternatively, the detected contact pressure can be used to correct the sensor signals or the evaluation thereof according to the pressure influence.

Preferably, at least one sensor of the device according to the invention is mounted resiliently on the cover or on the base. The resilient and thus flexible storage makes it possible to avoid too high contact pressure of the finger and thus a falsification of the measurement results.

According to a further embodiment of the invention, the device for automatically transferring the lid from the open position to the closed position is set up as soon as the support of a finger on the support surface is detected by means of the at least one sensor. The transfer can be either motorized, e.g. by means of suitable electric servomotors, or via a releasable spring drive (preferably with damper).

The base and / or the lid of the device according to the invention should have ventilation openings. Through the ventilation openings an air exchange and cooling in the area of the contact surfaces of the fingers is ensured. Furthermore, a harmful heat accumulation generated by the heat development of the electronics of the device is prevented. A build-up of heat in the area of the bearing surfaces could adversely affect the measurement results. The inventive device may have an externally accessible interface to the evaluation unit. This interface can be used to program the evaluation unit. This has the advantage that the programming can be carried out separately from the production of the "hardware" of the device according to the invention.The software for evaluating the measurement signals can include important know-how, which can be better protected by the possibility of separate programming Software, for example, in the memory of an integrated microcontroller of the device, the interface can be closed or rendered unusable to prevent later access to the software.

In the following, preferred embodiments of the invention are explained in more detail with reference to the drawings. Show it:

FIG. 1: a 3D isometric view of the

Contraption,

FIG. 2: a side view of the device, FIG. 3: a view of the device with the cover completely open,

FIG. 4 shows a schematic inside view of the base, FIG. 5 shows a plan view of the cover, FIG. 6 shows a further isometric 3D view of FIG

Contraption.

Hereinafter, similar elements will be denoted by like reference numerals. FIG. 1 shows an isometric three-dimensional view of the device 100 according to the invention. The device 100 has a length of less than 12 cm and a geometric shape with respect to its geometric configuration Width less than 8 cm and height less than 3 cm. Thus, the measuring device 100 is a portable measuring device.

The measuring device has as main elements a base 102 and a lid 104. In the specific embodiment of FIG. 1, both the base 102 and the cover 104 have recesses 106. The recesses 106 serve to receive a human finger. In the opening position of the lid shown in Figure 1, the human fingers can be inserted into the recesses 106, wherein due to the stop 6 of the recesses 106, a predefined position of the finger is specified.

The lid 104 is hinged to the base 102 about a first hinge 114 and a second hinge 112, the hinges 112 and 114 being adapted to transfer the lid 104 from the open position shown in Figure 1 to a closed position. In the said closed position of the lid while the finger is fixed in the recess 106. A movement of the finger perpendicular to the inner surface of the recess 106 and in the direction of the stop 116 is thus no longer possible.

The pivot axes of the hinges 112 and 114 are parallel to each other, so that the distance between the base 102 and cover 104 can be varied depending on the thickness of the finger to be inserted.

The measuring device 100 further has an evaluation unit (not shown in FIG. 1) for evaluating the physiological parameter of the human body, which was detected by the sensors 108. A display unit 110, arranged on the cover 104 on the side of the cover facing away from the base 102 serves to display the evaluation data. Preferably, the display device 110 is a so-called touch screen, so that a corresponding user is also able to select various functions of the device 100 by operating the touch screen. These may be, for example, various physiological parameters that can be measured independently by the device 100. Also shown schematically in Fig. 1 is an interface 118 to which various external devices can be connected. The interface 18 may be a commercially available USB interface, as well as a special interface for connecting external ECG devices (eg LEMO connection). Via the USB interface is both a control of the device, as well as a readout of data possible. The data transmission can also take place via other local or remote communication interfaces, eg Bluetooth, UMTS, GSM, LTE, WIBRO.

As an alternative or in addition to the interface 118, a card reading device may also be provided (for example micro SD) via which measured data can be transmitted to corresponding memory cards.

FIG. 2 shows a side view for demonstrating the foldable lid. Clearly visible in Figure 2 is the base 102 and the lid 104 as well as the hinges 112 and 114 over which the lid 104 is disposed on the base 102. Shown in FIG. 2A is the closing position of the measuring device 100, whereas in FIG. 2B the opening position of the lid is shown. The transfer from the open position to the closed position can be done either continuously or using, for example, different locking steps. The latter has the advantage that the next detent position can be assumed in each case when a certain force threshold is exceeded, so that a certain contact pressure can be exerted on the finger to be inserted when closing the lid so that it is optimally fixed in the recess 106 by the cover 104 can. FIG. 3 is a view of the device 100 with the lid fully open. Clearly visible in FIG. 3 are now different sensors, which are generally identified by reference numeral 108 in FIG. In detail, in FIG. 3, the device 100 has light emitters 302 on the base (for example light-emitting diodes, LEDs, continuum emitters in combination with filters) by means of which light in different wavelengths can be generated. Corresponding photodetectors 303, 310 for detecting the emitted from the LEDs 302 and inserted through the recess 106 in the finger scattered light are arranged in the lid 104 opposite (relative to the closed position of the lid) to the LEDs.

Further shown in FIG. 3 are, for example, electrodes 304 for the detection of electrocardiograms and the detection of bioimpedance data. The latter are detected in the interaction of the electrodes 304 with further electrodes 308 of a further recess 106.

Finally, the device 100 also has a temperature sensor 306, for example a temperature-dependent resistor, by means of which the body temperature can be detected when the finger is inserted. As already mentioned above, it is helpful if the device 100 has an opaque shielding of the recesses which perform corresponding photosensitive measurements. In FIG. 3, a corresponding shield 300 is provided with respect to the left-hand recess 106. This shield, for example in the form of a sealing lip, is arranged in the exemplary embodiment in FIG. 3 both on the cover 104 and on the base 102 and thereby completely encloses the edge of the recess 106.

For example, if the shield consists of a rubber-elastic material, which can be easily compressed, the shielding of the geometric shape of the finger to be inserted, depending on its geometric shape, can optimally adapt, so that a substantially complete shielding of the interior of the recess 106 against unintentionally from the outside incident light is ensured. At the same time, the shield prevents light radiation from a light source of the device 100 from being able to escape to the outside.

FIG. 4 shows a schematic inside view of the base 102. FIGS. 4A and 4B illustrate the modular design of the electronics. Thus, the base electronics may include, besides a battery 408, various modules such as an LED module 400, an ECG (electrocardiogram) module 402, a temperature sensing module 404, or a bioimpedance module 406 exhibit. As FIGS. 4A and 4B illustrate, the modular arrangement of the respective modules can be varied in a suitable manner. It is conceivable in this case that a corresponding device 100 is provided in a basic version in order to be able to be retrofitted with further modules later. For example, it is possible to provide the basic version only for bioimpedance and temperature measurement, with a corresponding user later having the option of including and evaluating information about his heart activities by adding an ECG module. Finally, FIG. 5 shows a plan view of a cover 104 of a device 100. Visible in FIG. 5 are first the hinges 114, by means of which the cover 104 is articulated to the base not visible in FIG. The touchscreen display 110 serves to display corresponding evaluation data, which are provided via an evaluation unit 500 integrated in the cover 104. Sensors transmit corresponding parameters, which were detected, to the integrated evaluation unit 500, which then determines the evaluation data from the detected parameters and transmits them to the display 110.

Furthermore, as described above, the touchscreen display also serves to simultaneously enter user-specific defaults, i. generally for functional check. This can include the choice of a suitable measurement program as well as the input of personal information, such as name, age, gender, height or weight of the person. FIG. 6 shows a further isometric three-dimensional view of the device 100 according to the invention. The measuring device has the base 102 and the cover 104 as main elements. The recesses 106 in turn serve to receive human fingers.

The recesses 106 (or generally the bearing surfaces 106) are laterally flanked by further slot-shaped recesses 600 into which opposing sheet-like shields 300 when closing the lid 104 can intervene. Due to the sheet-like shields 300, which protrude perpendicularly from the cover 104, a lateral light incident on the bearing surfaces 106 and leakage of light from the device integrated light sources is prevented to the outside. The shields 300 may be perforated or otherwise rendered breathable to prevent sweating of the finger or an increase in temperature which could falsify the measurements.

LIST OF REFERENCES

100 device

102 base

104 Lid

106 recess

108 sensor

110 display

112 hinge

114 hinge

116 stop

118 interface

300 shielding

302 LED

303 photodetector

304 electrode

306 temperature sensor

308 electrode

310 photodetector

400 module

402 module

404 module

406 module

408 battery

500 evaluation unit

600 recess

Claims

claims

A portable diagnostic measuring device (100) for non-invasively detecting at least one physiological parameter of the human body, the device (100) comprising at least one integrated sensor (108, 302, 303, 304, 306, 308, 310) for detecting the Parameters, and an integrated evaluation unit (500) for evaluating the parameter and providing evaluation data, wherein the device (100) has a base (102) and a lid (104), wherein the lid (104) on the base (102) for movement between an open position and a closed position, the base (102) and / or the cover (104) having at least one support surface (106) for supporting a human finger, the sensor being supported on or in the support surface (106). is arranged, wherein the device (100) is formed so that the finger between the base (102) and the lid (104) is fixable and a detection of the physiological Param eters in the closed position.

2. Device (100) according to claim 1, wherein the device (100) has an integrated display unit (110) for displaying the evaluation data.

3. Device (100) according to claim 1 or 2, wherein it is in the

Support surface around a recess (106) acts.

The apparatus (100) of claim 3, wherein the recess (106) is an elongated recess (106) extending at least semi-cylindrical parallel to the surface of the base (102).

5. Device (100) according to one of the preceding claims, wherein the base (102) and the lid (104) are hinged to each other for transfer between the open position and the closed position.

A device (100) according to claim 5, wherein the lid (104) is connected to the base (102) via a first hinge (114) for transfer between

Opening position and the closed position is arranged to be movable.

The apparatus (100) of claim 6, wherein the lid (104) further comprises a second hinge (112), the first hinge (114) being disposed on the second hinge (1 2), the pivot axes of the first and second hinges parallel to each other.

8. Device (100) according to one of the preceding claims, wherein the display unit on the base (102) facing away from the lid (104) is arranged.

9. Device (100) according to any one of the preceding claims, further comprising a battery receptacle in the base (102), wherein a battery located in the battery receptacle is wired or wirelessly chargeable.

10. Device (100) according to one of the preceding claims, wherein the device (100) has an analog and a digital electronic part, wherein the analog electronic part in the base (102) and the digital electronic part in the lid (104) is arranged or the analog Electronic part in the lid (104) and the digital electronic part in the base (102) is arranged.

11. Device (100) according to one of the preceding claims, wherein the display unit (110) is a touch screen.

12. Device (100) according to one of the preceding claims, further comprising a communication interface.

The apparatus (100) of claim 12, wherein the communication interface is a near field communication interface, a remote communication interface or a wired communication interface.

The apparatus (100) of any one of the preceding claims, further comprising an opaque shield (300) of the recess (106) for preventing light from entering the recess (106) in the closed position of the lid (104) with the finger inserted.

The apparatus (100) of claim 13, wherein the shield (300) is breathable.

The apparatus (100) of claim 14 or 15, wherein the shield (300) is a sealing lip.

The apparatus (100) of claim 14 or 15, wherein the shield (300) is formed by bristles projecting from the base (102) and / or the lid (104).

18. Device (100) according to any one of the preceding claims, wherein bearing surfaces (106) for supporting two fingers, namely a finger of the right and a finger of the left hand of a user of the device (100).

The apparatus (100) of claim 18, wherein the apparatus (100) comprises as integrated sensors:

at least one light emitter (302) for irradiating the body tissue of the resting finger, and at least one photodetector (303, 310) for detecting the radiation scattered and / or transmitted by the body tissue, and

Electrodes (304, 308) for detecting electrocardiogram and / or bioimpedance signals, and

a temperature or heat sensor (306).

20. Device (100) according to claim 19, wherein the evaluation unit (500) is set up to determine a metabolic parameter from the signals of the photodetector (303, 310), the electrocardiogram and / or bioimpedance signals and the signals of the temperature or thermal sensor ( 306).

21. Device (100) according to one of the preceding claims, wherein the at least one bearing surface (106) is associated with a pressure sensor which detects the contact pressure of the finger.

22. Device (100) according to one of the preceding claims, wherein at least one sensor (108, 302, 303, 304, 306, 308, 310) elastically resilient on

Lid (104) or on the base (102) is mounted.

23. Device (100) according to one of the preceding claims, wherein the device for automatically transferring the cover (104) from the opening position to the closed position is set up as soon as by means of the at least one sensor (108, 302, 303, 304, 306, 308 , 310) the support of a finger on the support surface (106) is detected.

24. Device (100) according to one of the preceding claims, wherein the base (102) and / or the cover (104) have ventilation openings.

25. Device (100) according to one of the preceding claims, wherein an externally accessible interface to the evaluation unit (500) is provided.