Vehicle seat with a sensor arrangement designed to detect magnetic fields of a human heart, and vehicle with at least one such vehicle seat

Abstract

Vehicle seat (1) for a vehicle, - with a backrest (3) arranged on a seat element (2), which has a back side (5) facing a user (4) of the vehicle seat (1) for supporting the back of the user (4) and a seat cover (6) on the back side (5), - with a sensor arrangement (7) for detecting magnetic fields of a human heart, comprising at least one fiber magnetometer (8, 9) having an optical fiber (10) and a sensor element (12) arranged at a free fiber end of the optical fiber (10) for detecting magnetic fields of the user's (4) heart, characterized in that - that at least one fiber magnetometer (8, 9) is arranged at least sectionally on the seat cover (6) of the backrest (3).

Description

[0001] The invention relates to a vehicle seat with a sensor arrangement for detecting magnetic fields of a human heart according to the preamble of claim 1. The invention relates in particular to a vehicle with at least one such vehicle seat.

[0002] Myocarditis is a common cause of sudden cardiac death, especially in young people. It can be triggered by relatively harmless, untreated flu-like infections, gastrointestinal infections, or other viral diseases. Early diagnosis can therefore be crucial for a positive recovery.

[0003] Conventional clinical diagnostic procedures, such as magnetic resonance imaging (MRI), electrocardiograms (ECGs), and ultrasound examinations, have the major disadvantage of not being contactless. Furthermore, these procedures require relatively large and expensive clinical equipment. Therefore, these established diagnostic methods are completely unsuitable for a vehicle environment.

[0004] German patent application DE 10 2004 022 262 A1 discusses highly sensitive, superconducting magnetometers, so-called SQUIDs (superconducting quantum interference devices), which can be used in particular to detect relatively weak magnetic fields. Unlike the methods listed above, SQUIDs operate without contact and are so sensitive that they can, for example, be used to detect the magnetic fields emanating from a human heart. This approach is based on the understanding that every contraction of the heart muscle is associated with electrical currents and thus with weak magnetic fields. A major disadvantage of SQUIDs is that during operation they must be cooled, using liquid helium or nitrogen, to a transition temperature that depends on the specific superconducting material used in the SQUID and is generally relatively close to absolute zero.The use of SQUIDs in a vehicle environment is therefore possible in principle, but involves a disproportionately large technical and monetary effort.

[0005] Furthermore, from US 2009 / 0 326 399 A1, a sensor arrangement for measuring the heart rate of a human heart is known, which includes SQUIDs arranged in a vehicle seat and / or in a seat belt for detecting magnetic fields of the human heart.

[0006] German patent DE 10 2021 209 759 A1, which represents a more advanced state of the art compared to the aforementioned US 2009 / 0 326 399 A1, describes a sensor arrangement as a gradiometer with magnetic field sensors for measuring vital signs, in particular heart rate, of a vehicle occupant. This arrangement is height-adjustable and positioned within the backrest of a vehicle seat. The height adjustability allows the sensor arrangement to be positioned close to the occupant's heart. The known magnetic field sensors can be designed as so-called nitrogen vacancy sensors.

[0007] In the article “All Fiber Vector Magnetometer Based on Nitrogen-Vacancy Center” by Man Zhao et al., Nanomaterials 2023, 13(5), 949, https: / / doi.org / 10.3390 / nano13050949, published on March 6, 2023, novel magnetometers for detecting magnetic fields are proposed. These fiber-based magnetometers, referred to as “all-fiber NV center vector magnetometers,” utilize a sensor element with a micro-diamond whose crystal lattice features at least one nitrogen vacancy, positioned at the free end of an optical fiber. The advantage of these novel magnetometers lies particularly in the fact that they do not require complex cooling and are suitable for contactless detection of magnetic fields.

[0008] The object of the invention is therefore to provide an improved or at least an alternative embodiment of a vehicle seat with a sensor arrangement for detecting the magnetic fields of a human heart. In particular, a vehicle with at least one such advantageous vehicle seat is to be specified.

[0009] In the present invention, this problem is solved in particular by the subject matter of the independent claims. Advantageous embodiments are the subject matter of the dependent claims and the description.

[0010] The invention has recognized that the novel “all-fiber NV center vector magnetometer” magnetometers described above, which are hereinafter referred to as fiber magnetometers, can be arranged in a special way in a vehicle seat so that they can be used to detect magnetic fields of the heart of a user of the vehicle seat.

[0011] Accordingly, a vehicle seat is proposed for a vehicle, comprising a backrest attached to a seat element of the vehicle seat. The backrest has a back surface facing the user of the vehicle seat for supporting the user's back and a seat cover on the back surface. Furthermore, the vehicle seat is equipped with a sensor arrangement for detecting the magnetic fields of a human heart, wherein the sensor arrangement comprises at least one fiber magnetometer. The at least one fiber magnetometer, in turn, comprises an optical fiber and a sensor element arranged at a free end of the optical fiber for detecting the magnetic fields of the user's heart. A key aspect of the present invention is that the at least one fiber magnetometer is arranged at least partially on the seat cover of the backrest.In other words, at least one fiber optic magnetometer is integrated, at least partially, into the seat backrest cover. This positions the sensor array in a location advantageous for detecting the magnetic fields of the user's heart—namely, as close as possible to the user's heart. This has the advantage that the sensor array allows for a relatively accurate, informative, and non-invasive examination of the user's heart. During everyday vehicle operation, and especially unnoticed by the user, the magnetic fields of the user's heart are continuously recorded as a function of time. The collected sensor data can be stored in the control and evaluation electronics of the sensor array, described below, and evaluated by the same electronics or transmitted to an external evaluation unit.For example, the user can be provided with the results of an examination, and in particular an indication of possible myocarditis, after a journey.

[0012] The structure and function of at least one fiber magnetometer are conveniently known to the person skilled in the art from the aforementioned technical article “All Fiber Vector Magnetometer Based on Nitrogen-Vacancy Center” Man Zhao et al., Nanomaterials 2023, 13(5), 949, https: / / doi.org / 10.3390 / nano 13050949 dated 06.03.2023, whereby the disclosure content of this technical article with regard to the structure of the fiber magnetometer is expressly to be incorporated into the disclosure of the present patent application.

[0013] The sensor element of the at least one fiber magnetometer expediently comprises a micro-diamond and an antenna, both of which are arranged at the free end of the optical fiber and configured for detecting magnetic fields of the human heart. The optical fiber of the at least one fiber magnetometer is expediently configured for transmitting sensor signals provided by the sensor element via the detected magnetic fields. The optical fiber is expediently a fiber optic cable, in particular an optical fiber. Furthermore, it may be provided that a further free end of the optical fiber, opposite the free end of the optical fiber, is connected to control and evaluation electronics, to be mentioned below, for controlling the at least one fiber magnetometer and for evaluating sensor signals detected by the at least one fiber magnetometer.The optical fiber is expediently routed through the vehicle seat, in particular at least partially through the backrest of the vehicle seat and / or at least partially through the seat element of the vehicle seat.

[0014] The seat backrest cover may be made of fabric, leather, or imitation leather, or a similar material. The seat cover will then be a fabric seat cover, a leather seat cover, or an imitation leather seat cover, respectively.

[0015] Advantageously, the at least one fiber optic magnetometer can be arranged, at least partially, on a visible side of the seat cover, or the at least one fiber optic magnetometer can be arranged, at least partially, on an inner side of the seat cover facing away from a visible side. The inner side of the seat cover can, in particular, face a backrest support structure or backrest padding arranged on the backrest support structure and / or be supported in contact with it. This means that the at least one fiber optic magnetometer is, so to speak, arranged directly on or integrated into the surface of the vehicle seat, at least partially. This avoids any potential shielding of the user's heart's magnetic fields by the support structure and / or the backrest padding, and therefore allows even relatively weak heart magnetic fields to be detected.

[0016] It is clear to those skilled in the art that the term "visible side" used herein refers to the side of the seat cover that the user of the vehicle seat can visually perceive when using the vehicle seat as intended. Furthermore, it is clear that the term "inside of the seat cover" used herein refers to the side of the seat cover that is not visually perceptible to the user when using the vehicle seat as intended.

[0017] It may also be advantageous for at least one fiber magnetometer to be woven into or sewn onto the seat cover, at least in sections. Alternatively or additionally, it may be provided that at least one fiber magnetometer is woven into or sewn onto a decorative embroidery on the seat cover, at least in sections. Furthermore, it may be alternatively or additionally provided that at least one fiber magnetometer is woven into or sewn onto a quilted seam on the seat cover, at least in sections. In other words, at least one fiber magnetometer is fixed to the seat cover, a decorative embroidery on the seat cover, or a quilted seam, at least in sections, by weaving or sewing.In particular, it can be provided that the optical fiber of the at least one fiber magnetometer is woven or sewn into the seat cover of the backrest, at least in sections, especially into a decorative embroidery on the seat cover or a quilted seam. This allows the at least one fiber magnetometer to be permanently and cost-effectively attached to the seat cover. Furthermore, the proposed method of fixing the at least one fiber magnetometer has the advantage that the user's seating comfort is not negatively affected.

[0018] If the seat backrest cover is made of leather, the cover may have a leather top layer visible to the user and a supporting underlayer facing away from the user. The at least one fiber magnetometer or the optical fiber of the at least one fiber magnetometer may be woven or sewn into the leather underlayer of the seat cover, at least in sections.

[0019] Advantageously, the optical fiber of the at least one fiber magnetometer can be provided to completely penetrate the seat cover, starting from an inner side of the backrest cover and extending to a visible side of the seat cover facing away from the inner side. The optical fiber of the at least one fiber magnetometer can be arranged at least partially on the inner side of the seat cover, and the free end of the optical fiber and the sensor element located at the free end of the fiber can be positioned on the visible side of the seat cover. The inner side of the seat cover can, in particular, face a backrest support structure or backrest padding arranged on the backrest support structure and / or be supported by contact with it.The optical fiber of the at least one fiber magnetometer thus penetrates the seat cover, advantageously being arranged or running at least partially on the inside of the seat cover. This has the advantage that the free fiber end and the sensor element attached to the free fiber end can be positioned on the visible side of the seat cover, thereby minimizing their distance from the user's heart. Advantageously, the free fiber end and the sensor element form part of the visible side of the seat cover. Furthermore, advantageously, the free fiber end and the sensor element of the at least one fiber magnetometer are oriented towards the user's back. As a result, the magnetic field of the user's heart can be detected relatively accurately.

[0020] Furthermore, it may be advantageous to provide that the sensor element of the at least one fiber magnetometer, located at the free end of the fiber, and / or the free end of the fiber magnetometer itself, are positioned within a detection area of ​​the seat cover that is horizontally opposite an average heart position of the user, determined, for example, empirically. This places the at least one fiber magnetometer in an area of ​​the seat cover that is located at the average height and lateral position of the human heart (the so-called average heart position). This minimizes the distance between the sensor element of the at least one fiber magnetometer and the user's heart, ensuring optimal detection of the magnetic field emanating from the user's heart. The term "horizontal" refers to the intended use of the vehicle seat by the user.

[0021] The detection area of ​​the seat cover extends advantageously in a vertical direction parallel to the main direction of extension of the backrest and in a lateral direction perpendicular to the vertical direction. The detection area can, for example, be circular or rectangular.

[0022] The average heart position is conveniently the position in which the heart of a vehicle seat user is most likely to be positioned, for example in 95% of cases.

[0023] Furthermore, the sensor arrangement may include at least one additional fiber magnetometer or several additional fiber magnetometers, each of which is arranged at least partially on the seat cover of the backrest. The at least one additional fiber magnetometer or the several additional fiber magnetometers can advantageously be arranged within the detection area of ​​the seat cover positioned close to the heart. For example, the fiber magnetometers can be evenly distributed across the detection area and / or arranged in a predefined pattern, such as a dot matrix. In other words, the free fiber ends of the fiber magnetometers are arranged around the average position of the heart. This ensures that at least one fiber magnetometer of the sensor arrangement is at a minimal distance from the user's heart.Therefore, even with different users of varying heights or when the same user assumes different sitting positions, reliable detection of the user's heart's magnetic fields is possible. The proposed sensor arrangement can thus be operated with relatively high reliability overall.

[0024] Furthermore, it is conceivable that the magnetic fields of a human heart detected by the sensor array could be used to generate a magnetic field vector map. Such a magnetic field vector map could increase the accuracy of diagnosing potential myocarditis.

[0025] Furthermore, the sensor arrangement may include control and evaluation electronics for controlling at least one fiber magnetometer and for evaluating the acquired sensor signals, wherein the control and evaluation electronics are arranged on or within the vehicle seat. Advantageously, the control and evaluation electronics can be arranged in an area of ​​the vehicle seat that does not affect the user's seating comfort. This can be achieved, for example, by arranging the control and evaluation electronics within the seat element or within the backrest of the vehicle seat. It is also conceivable that the control and evaluation electronics are arranged under the seat element of the vehicle seat, specifically on an underside of the seat element facing away from the seating surface.The control and evaluation electronics can advantageously include an excitation laser, photodiodes, microwave voltage generators, and a control unit. Furthermore, it is at least conceivable that the control and evaluation electronics are connected to a vehicle's computer system, whereby data provided by the control and evaluation electronics can advantageously be output to the user via the vehicle's infotainment system, for example, visualized.

[0026] It can be advantageous if the optical fiber of the at least one fiber magnetometer runs, at least in sections, between an inner surface of the seat cover facing away from a visible side of the seat cover and a support structure of the backrest or a backrest cushion arranged on the support structure of the backrest. The optical fiber can be connected to the control and evaluation electronics described above.

[0027] It may be advantageous to provide that at least one fiber magnetometer is configured to detect magnetic fields of the user's heart that have a magnetic flux density of less than 10 -11 Tesla. This indicates a relatively sensitive fiber magnetometer, which can reliably detect even the relatively weak magnetic fields emanating from a heart.

[0028] In particular, the at least one fiber magnetometer can be configured to detect the magnetic fields of the user's heart for a period corresponding to the duration of a T-wave of the heart. According to the invention, the T-wave of the heart is advantageously a segment in an electrocardiogram that characterizes the repolarization phase of the ventricle. This period can therefore, in particular, last between 300 ms and 400 ms. Preferably, the period can correspond to the duration of a T1 wave of the heart.

[0029] Furthermore, it can be specifically provided that at least one fiber magnetometer is configured as a gradiometer. In this case, the at least one fiber magnetometer is formed by at least two sub-sensors, the first of which detects an interfering field, for example, the Earth's magnetic field or a stray field from a vehicle battery, and the second of which detects the magnetic fields of the user's heart. This has the advantage that interfering fields can be detected directly at the point of measurement and then filtered out.

[0030] According to a further basic concept of the invention, a vehicle is provided that is equipped with at least one vehicle seat which has at least one feature of the vehicle seat according to the preceding description. The vehicle seat can, for example, be a driver's seat, a passenger seat, or a rear seat.

[0031] In summary, the present invention advantageously relates to a vehicle seat for a vehicle with a backrest arranged on a seat element, which has a backrest facing the user of the vehicle seat for supporting the user's back and a seat cover on the backrest. The vehicle seat is further equipped with a sensor arrangement for detecting magnetic fields of a human heart, which includes at least one fiber magnetometer having an optical fiber and a sensor element arranged at a free end of the optical fiber for detecting magnetic fields of the user's heart. A key feature of the invention is that the at least one fiber magnetometer is arranged at least partially on the seat cover of the backrest. The invention further relates to a vehicle with at least one such vehicle seat.

[0032] Further important features and advantages of the invention will become apparent from the dependent claims, the drawings and the associated description of the figures based on the drawings.

[0033] It is understood that the features mentioned above and those to be explained below can be used not only in the combination specified, but also in other combinations or on their own, without leaving the scope of the present invention.

[0034] Preferred embodiments of the invention are shown in the drawings and are explained in more detail in the following description, wherein identical reference numerals refer to identical or similar or functionally identical components.

[0035] Each of these shows, schematically: Fig. 1 in a side view a highly simplified embodiment of a vehicle seat with a sensor arrangement designed to detect magnetic fields of a human heart, Fig. 2 in a perspective view a preferred further embodiment of a vehicle seat with a sensor arrangement designed to detect magnetic fields of a human heart, Fig. 3 a greatly enlarged section of the vehicle seat cover made of Fig. 2.

[0036] The Fig. 1 and Fig. Figure 2 shows a vehicle seat, designated in its entirety by reference numeral 1, which is typical in automotive engineering and comprises a seat element 2 and a backrest 3 attached to the seat element 2. The seat element 2 forms an ergonomically shaped seat surface 20 on which a user 4 of the vehicle seat 1 (shown in a highly simplified manner) has taken a seat. The backrest 3 has an internal support structure (not shown) to which upholstery (also not shown) is attached. The backrest 3 also has an ergonomically shaped backrest 5 facing the user 4, over which the user 4 can sit when sitting in the vehicle seat 1. Fig. Figure 1 shows the intended use of the vehicle seat 1, which supports the back. The backrest 3 also has a seat cover 6 on the back side 5, which is fitted over the support structure and the padding. The seat cover 6, which can be made of fabric, leather or imitation leather, for example, has a visible side 13 that is recognizable by the user 4, as well as an inner side 14 that faces away from the visible side 13 of the seat cover 6 and the padding.

[0037] The proposed vehicle seat 1 is further equipped with a sensor arrangement 7 designed to detect the magnetic fields of a human heart, which, by way of example, comprises a first fiber magnetometer 8 and a second fiber magnetometer 9. The fiber magnetometers 8 and 9 each have a long, flexible optical fiber 10, for example, a fiber optic cable, and a sensor element 12 arranged at a free fiber end of the optical fiber 10, which is designed to detect the magnetic fields of the user's heart 4.In order to effectively detect magnetic fields of the user's heart 4 and to provide the sensor arrangement 7 cost-effectively, it is provided that the fiber magnetometers 8, 9 are expediently realized by novel, so-called "all-fiber NV center vector magnetometer" magnetometers and / or that the fiber magnetometers 8, 9 are arranged at least section by section on the seat cover 6 of the backrest 3.

[0038] In Fig. 1 and Fig. Figure 2 further shows that the sensor arrangement 7 includes control and evaluation electronics 17, which are configured to control the fiber magnetometers 8, 9 and to evaluate the acquired sensor signals. Advantageously, the control and evaluation electronics 17 are located below the seat element 2. Furthermore, the optical fibers 10 of the fiber magnetometers 8, 9 run at least partially through the backrest 3 and at least partially through the seat element 2, and are connected to the control and evaluation electronics 17.

[0039] To further improve the detection of magnetic fields from the heart of user 4, the optical fibers 10 of the fiber magnetometers 8, 9 are designed to completely penetrate the seat cover 6, extending from the inner side 14 of the seat cover 6 to the visible side 13 of the seat cover 6. The optical fibers 10 are arranged at least partially on the inner side 14 of the seat cover 6, for example, woven, sewn, or embroidered. Furthermore, the free fiber ends and the sensor elements 12 on the visible side 13 of the seat cover 6 are oriented towards the back of user 4 and are evenly distributed within a circular detection area 15 of the seat cover 6 or arranged in a predefined pattern. The detection area 15 is positioned on the seat cover 6 such that it is horizontally opposite, for example, an empirically determined average heart position 16 of user 4.Because the free fiber ends and the sensor elements 12 of the fiber magnetometers 8, 9 are arranged within the detection area 15 of the seat cover 6, during normal use of the vehicle seat 1, at least one free fiber end and at least one sensor element 12 of a fiber magnetometer 8, 9 is located approximately at an average height and lateral position of the user's heart 4, so that the distance between the user's heart 4 and the respective fiber magnetometer 8, 9 is small. For example, the distance between the sensor element 12 of the first fiber magnetometer 8 and the user's heart 4 is small, allowing the first fiber magnetometer 8 to optimally detect magnetic fields emanating from the user's heart 4.The detection area 15 of the seat cover 6 expediently extends in a vertical direction parallel to the main extension direction of the backrest 3 and in a horizontal direction perpendicular to the vertical direction over the seat cover 6.

[0040] Furthermore, in Fig. Figure 3 illustrates that the fiber magnetometers 8, 9 are arranged at least partially on the visible side 13 of the seat cover 6. Alternatively, the fiber magnetometers 8, 9 could also be arranged on the inner side 14 of the seat cover 6. It is shown, purely by way of example, that the optical fibers 10 of the fiber magnetometers 8, 9 are woven at least partially into the seat cover 6.

[0041] Furthermore, it should be mentioned that, during the intended use of the vehicle seat 1, it may be provided that the sensor arrangement 7 continuously records the magnetic fields of the user's heart 4 as a function of time, for example, over the entire duration of a journey, and stores them, for example, in the control and evaluation electronics 17. The control and evaluation electronics 17 may be equipped with a suitable storage element for this purpose. Furthermore, the control and evaluation electronics 17 can identify a preferred fiber magnetometer 8, 9 by comparing the sensor signals continuously provided by the fiber magnetometers 8, 9, whose sensor signals are to be evaluated and used, for example, for diagnostic purposes.In the aforementioned comparison of sensor signals, the fiber magnetometer 8, 9 with the most informative or strongest sensor signals can be selected, since experience has shown that this fiber magnetometer 8, 9 is located at the minimum distance to the user's heart 4. Alternatively or additionally, the control and evaluation electronics 17 can average the sensor signals continuously provided by the fiber magnetometers 8, 9 by calculating a mean value. This allows for optimal evaluation with the lowest possible standard deviation and thus the most accurate diagnosis possible. Alternatively or additionally, the control and evaluation electronics 17 can process the sensor signals continuously provided by the fiber magnetometers 8, 9 using a trained neural network.In this context, if, for example, a medical diagnosis contradicts the diagnosis of the control and evaluation electronics 17, i.e., a measurement error occurs, the neural network can be trained in a reinforcement learning approach, whereby the stored neural networks are provided to the neural network as a negative "reward" so that it can avoid measurement errors in the future.

[0042] Furthermore, it can be provided that the stored sensor signals, which are continuously provided by the fiber magnetometers 8 and 9, are deleted if myocarditis is unlikely. If, however, myocarditis is relatively likely, the stored sensor signals are saved, for example, along with an analysis result and a timestamp. If myocarditis is subsequently detected, for example, during a subsequent journey, it is possible to output the most recently stored sensor signals, along with the currently stored sensor signals, to user 4 after the journey has ended. User 4 could then be shown the stored sensor signals, a recommendation to consult a doctor, or similar information.

Claims

[1] Vehicle seat (1) for a vehicle, - with a backrest (3) arranged on a seat element (2), which has a back side (5) facing a user (4) of the vehicle seat (1) for supporting the back of the user (4) and a seat cover (6) on the back side (5), - with a sensor arrangement (7) for detecting magnetic fields of a human heart, comprising at least one fiber magnetometer (8, 9) comprising an optical fiber (10) and a sensor element (12) arranged at a free fiber end of the optical fiber (10) for detecting magnetic fields of the user's heart (4), characterized by , that - that at least one fiber magnetometer (8, 9) is arranged at least sectionally on the seat cover (6) of the backrest (3). [2] Vehicle seat (1) according to claim 1, characterized by , that - that at least one fiber magnetometer (8, 9) is arranged at least sectionally on a visible side (13) of the seat cover (6), or - that at least one fiber magnetometer (8, 9) is arranged at least sectionally on an inside (14) of the seat cover (6) facing away from a visible side (13) of the seat cover (6). [3] Vehicle seat (1) according to claim 1 or 2, characterized by , that - that at least one fiber magnetometer (8, 9) is woven into the seat cover (6) at least in sections or sewn onto the seat cover (6), or - that at least one fiber magnetometer (8, 9) is woven into or sewn onto a decorative embroidery of the seat cover (6), at least in sections, or - that at least one fiber magnetometer (8, 9) is woven into or sewn onto a quilted seam of the seat cover (6), at least in sections. [4] Vehicle seat (1) according to any one of the preceding claims, characterized by, that - the optical fiber (10) of the at least one fiber magnetometer (8, 9) completely penetrates the seat cover (6) from an inside (14) of the seat cover (6) to a visible side (13) of the seat cover (6) facing away from the inside (14). [5] Vehicle seat (1) according to claim 4, characterized by , that - the optical fiber (10) of the at least one fiber magnetometer (8, 9) is arranged at least sectionally on the inside (14) of the seat cover (6), - the free fiber end of the optical fiber (10) and / or the sensor element (12) arranged at the free fiber end are located on the visible side (13) of the seat cover (6). [6] Vehicle seat (1) according to any one of the preceding claims, characterized by , that - the sensor element (12) of the at least one fiber magnetometer (8, 9) arranged at the free end of the fiber is located within a detection area (15) of the seat cover (6) which is horizontally opposite an average heart position (16) of the user (4). [7] Vehicle seat (1) according to any one of the preceding claims, characterized by , that - the sensor arrangement (7) comprises at least one further fiber magnetometer (9) or several further fiber magnetometers, each of which is arranged at least partially on the seat cover (6) of the backrest (3). [8] Vehicle seat (1) according to any one of the preceding claims, characterized by , that - the sensor arrangement (7) includes control and evaluation electronics (17) for controlling at least one fiber magnetometer (8, 9) and for evaluating detected sensor signals, - wherein the control and evaluation electronics (17) are arranged on or inside the vehicle seat (1). [9] Vehicle seat (1) according to any one of the preceding claims, characterized by , that - that at least one fiber magnetometer (8, 9) is configured to detect magnetic fields of the user's heart (4) which have a magnetic flux density of less than 10 -11 Tesla. [10] Vehicle seat (1) according to any of the preceding claims, characterized by , that - that at least one fiber magnetometer (8, 9) is set up to detect magnetic fields of the user's heart (4) in a time period corresponding to the duration of a T-wave of the heart. [11] Vehicle seat (1) according to any one of the preceding claims, characterized by , that - that at least one fiber magnetometer (8, 9) is designed as a gradiometer. [12] Vehicle with at least one vehicle seat (1) according to any one of the preceding claims 1 to 11.

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