Sensor device for determining height information for a vehicle, in particular a commercial vehicle, method, computer program and / or computer-readable medium, data processing device, suspension system, vehicle

Abstract

A sensor device (100) for determining ride height information (102) for a vehicle (200a), in particular a commercial vehicle (200b), comprises a shock absorber (105) for a pneumatic suspension system (260) of the vehicle (200a) and a pressure sensor (110) for sensing a pressure (p) within the shock absorber (105), and a data processing device (250) for receiving and evaluating a pressure signal (112) representing the pressure (p). The data processing device (250) is configured to determine the ride height information (102) based on the pressure signal (112).

Description

The disclosure relates to a sensor device for determining level information for a vehicle. The disclosure also relates to a method for determining level information for a vehicle, a computer program and / or computer-readable medium, a data processing device for a vehicle, a pneumatic suspension system for a vehicle, comprising a sensor device, and a vehicle having a pneumatic suspension system and having a sensor deviceThe vehicle can be, in particular, a commercial vehicle and, for example, a towing vehicle and / or trailer vehicle of a multi-membered vehicle combination, a one-piece vehicle, a bus and / or a passenger vehicle. A height level of the vehicle denotes a height of a chassis or of a superstructure and / or of a body of the vehicle relative to other vehicle components, such as, for example, an axle and / or a chassis of the vehicle, and / or relative to the roadway.Sensor devices for determining the elevation or the elevation information are known from the prior art. Sensor devices of the generic type are customary in electronic controls for, in particular, pneumatic suspension systems and supply signals with the aid of which the height and / or an inclination of the superstructure, of the chassis and / or of the body can be controlled and changed above the axle or thus above the roadway, i.e. they supply signals which a level control system requires in order that a corresponding control algorithm is actually capable of working.Known as relatively simple sensors are mechanical height sensors, for example frequently used angle of rotation sensors, with the aid of which a spring travel is converted into a rotational movement via a lever mechanism, as a result of which a change in height, for example of a vehicle axle or of a chassis element, can be determined. The height sensor is designed as a sensor system which consists of an angle sensor and a linkage and translates a vertical movement of the vehicle into a rotational angle. This type of height sensor has the disadvantage that this sensor and the linkage have to be installed separately. For this purpose, installation space must also be kept in the vehicle, in which the sensor and the linkage can be installed. The lever mechanism of such angle-of-rotation sensors is also relatively susceptible to damage, contamination and / or mechanical faults and therefore has to be frequently replaced and / or maintained. In addition, such a sensor system can be adapted to different chassis heights and / or design variants and cannot be universally implemented for a specific suspension system.Further methods for determining the height level are also known from the prior art, for example by means of a radar sensor.WO 2023 / 041 475 A1 discloses a sensor device for determining a spatial position of a body or of a superstructure of a vehicle, wherein tilts or respectively relative distances of the superstructure or body with respect to axes, chassis and / or road surface can be measured by means of the sensor device and the signals of the sensor device of an electronic control device of a level control system corresponding to the determined tilts or distances can be transmitted and processed in the electronic control device in a control algorithm, wherein the sensor device has a combination of at least one distance measuring sensor and an inclination sensor.WO 2023 / 041 475 A1 further discloses an electronic evaluation unit, wherein the sensor signals of both sensors can be processed by the electronic evaluation unit and transmitted to the electronic control device. In this case, the distance-measuring sensor can be designed as a radar sensor with an associated evaluation unit processing the radar signal, in particular in the form of a microcontroller. The inclination sensor can be designed as an acceleration sensor.EP 4 020 012 A1 discloses a chassis height measuring system for a vehicle, in particular a commercial vehicle or passenger vehicle, having an axle which is suspended from a suspension system, in particular an air suspension system. The chassis height measurement system includes a height sensor configured to provide a road distance signal representative of a distance between a road surface and a chassis of the vehicle. The height sensor is a radar sensor which is fastened to the chassis and the field of view of which is defined by a measurement opening, wherein the radar sensor is arranged such that an axis reference object, in particular the axis, is located in the field of view. The radar sensor is configured to provide an axle distance signal representing a distance between the chassis and the axle reference object.Against the background of this prior art, it is an object of the present disclosure to specify a device which is suitable for improving the prior art and for improving at least the abovementioned aspects of the prior art. In particular, the object of the disclosure is to be able to provide the determination of the height level reliably, cost-effectively and universally.The object is achieved by the features of the independent claims. The dependent claims include further developments of the disclosure.According to one aspect of the disclosure, the object is achieved by a sensor device for determining level information for a vehicle, in particular a commercial vehicle, wherein the sensor device comprises a shock absorber for a pneumatic suspension system and having a pressure sensor for sensing a pressure within the shock absorber and a data processing device for receiving and evaluating a pressure signal representing the pressure. The data processing device is configured to determine the elevation information on the basis of the pressure signal. The data processing device can be designed in particular as a so-called ECU (electronic control unit).According to the invention, it has been recognized that it is possible to measure the pressure within the shock absorber and to correlate this pressure with, for example, the height of the air-sprung vehicle, that is to say to implement a height measurement on the basis of the shock absorber pressure. The pressure signal representing the pressure can consequently be used for an elevation control of the vehicle and / or for a condition determination.The pressure signal and the height information can relate to the shock absorber. For determining the height and / or the inclination, the vehicle and / or the sensor device may comprise a plurality of shock absorbers and pressure sensors and the data processing device may be configured for processing the pressure signals representing the pressures within the shock absorbers.The sensor device described integrates a function of a height level sensor in a shock absorber by sensing the pressure and obtaining the height level information from the pressure. This saves costs for installing an additional sensor on the vehicle and also eliminates the error-prone linkage of the conventional sensor, which can also save installation space and increase serviceability. Different variants for different chassis heights and attachment variants are also omitted, since the sensor device can be used universally, independently of a structure of the vehicle. The sensor device also prevents a pressure measurement at an air spring of the vehicle, since this additionally depends on a loading state of the vehicle and is therefore typically required for correction.Optionally, the shock absorber comprises a container tube having a through-opening and a fluid with the pressure arranged in the container tube, and the pressure sensor is arranged within the through-opening. Disposing the pressure sensor within the through hole allows effective access of the pressure sensor to the fluid to be measured in pressure and thus precise pressure measurement. For this purpose, the pressure sensor can optionally be arranged at least partially within the container tube. The arrangement in the through-opening can also make it possible for the pressure sensor to be able to be connected to the data processing device in a wired manner in terms of communication for transmitting the pressure signal. Optionally, the pressure sensor arranged in the through-opening can be connected wirelessly to the data processing device in terms of communication technology in order to provide simpler assembly.Optionally, the shock absorber comprises a container tube with a fluid arranged in the container tube with the pressure and the pressure sensor is arranged within the container tube and is configured for the wireless transmission of the pressure signal to the data processing device. It has been recognized that it is possible to arrange an autonomous pressure sensor within the container tube. In this way, a through-opening that would have to be sealed can be avoided, whereby an effective sealing of the shock absorber is possible as in a shock absorber from the prior art. The arrangement of an autonomous pressure sensor can also enable retrofitting of a pressure sensor. Here, autonomous means that the pressure sensor does not necessarily have to be connected to the data processing device by cable for the energy supply and / or for the communication connection.Optionally, the data processing device is configured to determine a quasi-static contribution to the pressure on the basis of the pressure signal and to determine the height level information on the basis of the quasi-static contribution. The pressure in a damper changes dynamically, for example in the case of impacts, but also quasistatically with a change in an extension length of the damper, in particular due to a displacement effect of a piston rod within a fixed volume of the container tube. The quasistatic contribution to the pressure and / or its change (quasistatic pressure change) thus indicates the proportion of the pressure which comprises the information about the height. In order to separate the quasistatic from a dynamic contribution to the pressure and / or the quasistatic pressure change from a dynamic pressure change, various filters such as a moving average filter and / or a Kalman filter may be used.Optionally, the data processing device is configured to determine the dynamic contribution to the pressure on the basis of the pressure signal. On the basis of the dynamic contribution to the pressure, it is possible to infer, for example, the condition of the roadway and / or of the shock absorber.Optionally, the sensor device has a temperature sensor for sensing a temperature of the shock absorber, and the data processing device is configured to determine the elevation information taking into account a temperature signal representing the temperature of the shock absorber. The temperature of the shock absorber can be understood here to mean, for example, a temperature of the fluid and / or a temperature of the container tube. It has been recognized that the temperature of the fluid has an influence on the pressure within the shock absorber or the piston, since the temperature of the shock absorber can vary greatly, in particular if the shock absorber has to absorb a comparatively large amount of energy, for example, during travel on a rough road section. The influence of the temperature on the determination of the height level information can be determined with the aid of a temperature measurement.Optionally, the shock absorber comprises a container tube with a fluid arranged in the container tube at the pressure and the temperature sensor is arranged within the container tube and / or is configured to sense the temperature of the container tube. It was recognized that the temperature sensor, analogously to the pressure sensor, can be arranged inside or at least partially inside, for example in a through-opening, the container tube. Thus, the temperature of the fluid can be directly measured as the temperature of the shock absorber. Alternatively, the temperature sensor can be arranged outside the container tube and / or inside a protective tube or dust guard in order to sense a temperature of the container tube, which is an indicator for the temperature of the fluid inside the container tube.Optionally, the pressure sensor and the temperature sensor are integrated in a housing. The pressure sensor and the temperature sensor can thus be provided in one component, which enables a spatial relationship between the measurement of the temperature and the pressure and a simple assembly and / or maintenance.Optionally, the data processing device is configured to calibrate, re-calibrate and / or determine a state of the shock absorber based on the predetermined operating states of the shock absorber. It has been recognized that a change in the state of the shock absorber, for example a change in its volume, in particular due to an oil loss over the service life of the shock absorber, can be compensated for by a calibration of the pressure sensor in known states. This information can additionally be used to identify a defective shock absorber, for example.Optionally, the predetermined operating states are each defined by a deflection point. It has been recognized that deflection points may reflect well-defined operating states of the shock absorber, in particular a minimum or maximum deflection point.According to one aspect of the disclosure, a method for determining level information for a vehicle, in particular a commercial vehicle, is provided, wherein the method comprises detecting a pressure signal representing a pressure within a shock absorber of a pneumatic suspension system, determining level information on the basis of the pressure signal and outputting the level information. Optionally, the method is carried out in such a way that one of the features described as optional and / or advantageous with respect to the sensor device is realized in order to achieve a technical effect associated therewith.According to one aspect of the disclosure, a computer program and / or a computer readable medium is provided. The computer program and / or the computer readable medium comprise instructions which, when the program or instructions are executed by a data processing device, cause the latter to carry out the method according to the disclosure and / or steps thereof. Optionally, the computer program and / or the computer-readable medium comprises instructions which, when the program or instructions are executed by a data processing device, cause the latter to carry out the method steps described as advantageous or optional in order to achieve a technical effect associated therewith.According to one aspect of the disclosure, a data processing device for a vehicle, in particular a commercial vehicle, is provided. The data processing device is configured to carry out the method described above. Optionally, the data processing device is configured to perform a method step described as advantageous or optional and / or to implement a method feature in order to achieve a technical effect associated therewith.According to one aspect of the disclosure, a pneumatic suspension system for a vehicle, in particular a commercial vehicle, comprising a sensor device described above is provided. Optionally, the sensor device has one of the features described above as optional or advantageous and / or is configured to carry out a method step described as advantageous or optional and / or to realize a method feature in order to achieve a technical effect associated therewith.According to one aspect of the disclosure, a vehicle, in particular a commercial vehicle, is provided with a pneumatic suspension system and with a sensor device described above. Optionally, the sensor device has one of the features described above as optional or advantageous and / or is configured to carry out a method step described as advantageous or optional and / or to realize a method feature in order to achieve a technical effect associated therewith.One embodiment is described below with reference to the figures. FIG. 1 schematically shows a vehicle, in particular a commercial vehicle, according to one aspect of the disclosure; FIG. 2 schematically shows a sensor device according to an aspect of the disclosure in two different operating states; FIG. 3 schematically illustrates a sensor device according to an aspect of the disclosure; FIG. 4 schematically illustrates a flow diagram of a method according to an aspect of the disclosure; and FIG. 5 is a schematic illustration of a computer program and / or computer readable medium in accordance with an aspect of the disclosure.FIG. 1 schematically illustrates a vehicle 200 a, in particular commercial vehicle 200 b, according to an aspect of the disclosure. The vehicle 200 a, in particular commercial vehicle 200 b, is referred to below as vehicle 200 a, 200 b. The vehicle 200 a, 200 bis, for example, a towing vehicle and / or trailer vehicle of a multi-membered vehicle combination, a one-piece vehicle, a bus and / or a passenger car. The vehicle 200 a, 200 bis a land vehicle. In particular, a dedicated drive can be dispensed with in the case of the vehicle 200 a, 200 bas a trailer vehicle.The vehicle 200 a, 200 bhas a pneumatic suspension system 260. The pneumatic suspension system 260 mechanically connects, for example, a chassis, a body and / or a structure of the vehicle 200 a, 200 bto, for example, an axle construction and thus to wheels of the vehicle 200 a, 200 band thus ultimately to a roadway on which the vehicle 200 a, 200 bis arranged. The pneumatic suspension system 260 is configured to be pneumatically actuated to change a height and / or inclination of the chassis, the body and / or the superstructure, for example relative to the roadway.For this purpose, the pneumatic suspension system 260 has a sensor device 100 with a shock absorber 105. In another embodiment (not shown), the pneumatic suspension system 260 includes multiple such sensor devices 100 and / or shock absorbers 105, for example, one sensor device 100 and / or one shock absorber 105 per wheel and / or per axle.Furthermore, the sensor device 100 has a data processing device 250, wherein the data processing device 250 is configured to carry out the method 300 according to FIG. 4. The data processing device 250 is configured to determine an elevation information 102.For this purpose, the sensor device 100 according to FIG. 1 has a pressure sensor 110 and a temperature sensor 120. The data processing device 250 is communicatively connected to the pressure sensor 110 and the temperature sensor 120 so that the data processing device 250 can receive from the pressure sensor 110 a pressure signal 112 representing a pressure p within the shock absorber 105 and from the temperature sensor 120 a temperature signal 122 representing a temperature T of the shock absorber 105. In another embodiment (not shown), the temperature signal 122 and the temperature sensor 120 are unnecessary.The data processing device 250 is configured to process the pressure signal 112 and the temperature signal 122 in order to determine an elevation information 102. The height level information 102 can then be used to calculate the inclination and / or height of the vehicle 200 a, 200 bor of the chassis, the body and / or the superstructure. This can be done, for example, taking into account the pressure signals 112 of a plurality of sensor devices 100 and / or shock absorbers 105 of the vehicle 200 a, 200 b, wherein each of the sensor devices 100 and / or each of the shock absorbers 105 is associated with a wheel and / or an axle of the vehicle 200 a, 200 b(not shown). Optionally, the temperature signal 122 can additionally be taken into account.The sensor device 100 is described in more detail below with reference to FIGS. 2 and 3.FIG. 2 schematically shows a sensor device 100 according to an aspect of the disclosure in two different operating states Z 1, Z 2. The sensor device 100 according to FIG. 2 is a sensor device 100 for determining level information 102 for a vehicle 200 a, 200 b. Such a vehicle 200 a, 200 bis described with reference to FIG. 1. FIG. 2 will be described with reference to FIG. 1.In this case, FIG. 2 shows the two operating states Z 1, Z 2 in sections (A) and (B). The operating states Z 1, Z 2 differ here by a deflection point A 1, A 2 of the shock absorber 105. In section (A), the shock absorber 105 shows a first operating state Z 1 with a first deflection point A 1 corresponding to compression, wherein the shock absorber 105 is comparatively slightly deflected. In section (B), the shock absorber 105 shows a second operating state Z 2 with a second deflection point A 2, wherein the shock absorber 105 is deflected comparatively far.The following description applies equally to the sensor device 100 according to section (A) and to the sensor device 100 according to section (B).The shock absorber 105 has two receptacles 131 for mounting the shock absorber 105 on the vehicle 200 a, 200 b. The receptacles 131 are spaced apart from one another in such a way that a distance between the receptacles 131 defines the respective deflection point A 1, A 2 of the shock absorber 105.The shock absorber 105 includes a reservoir tube 106 and a piston rod 132. The piston rod 132 is fixed to one of the receptacles 131, and the container tube 106 is fixed to the other of the receptacles 131. An end of the piston rod 132 spaced from the receptacle 131, to which the piston rod 132 is fixed, forms a working piston 133 which is arranged displaceably in a cylinder 135 which is fixedly connected to the container tube 106. Due to the displacement of the working piston 133 and thus of the piston rod 132 with respect to the cylinder 135 and thus of the container tube 106, the shock absorber 105 can assume different deflection points A 1, A 2.The shock absorber 105 comprises a dust protector 130 in order to protect the piston rod 132 from dirt, in particular in the second operating state Z 2.Between the cylinder 135 and the container tube 106 a volume Vol is arranged in which a fluid 108, for example an oil, and a gas 109 are arranged. The cylinder 135 is filled with the fluid 108. In order to allow the working piston 133 to be displaced in the cylinder 135, the shock absorber 105 has a piston valve 134 and a bottom valve 136. The piston valve 134 enables the transport of the fluid 108 through the working piston 133 and thus between an upper portion O of the cylinder 135 and a lower portion U of the cylinder 135 that is spatially separated from the upper portion by the working piston 133. The bottom valve 136 allows fluid 108 to be transported between the cylinder 135 and the volume Vol between the cylinder 135 and the reservoir tube 106.The fluid 108 is under a pressure p and has a temperature T.The sensor device 100 comprises a pressure sensor 110 for sensing the pressure p of the fluid 108, that is to say the pressure p prevailing within the shock absorber 105. The sensor device 100 has a temperature sensor 120 for sensing the temperature T of the fluid 108 within the shock absorber 105. In another embodiment (not shown), the temperature sensor 120 may be disposed outside the reservoir tube 106 to measure the temperature of the reservoir tube 106 and estimate the temperature T of the fluid 108 from the temperature of the reservoir tube.The container tube 106 according to FIG. 2 has a through-opening 107. The through-opening 107 extends radially through the container tube 106. The pressure sensor 110 is arranged inside the through hole 107. In addition, the temperature sensor 120 is disposed inside the container tube 106. The pressure sensor 110 can thus measure the pressure p and the temperature sensor 120 the temperature T of the fluid 108. The pressure sensor 110 and the temperature sensor 120 are integrated in a housing 125. The housing 125 is arranged in the through-opening 107 and extends into the container tube 106 or into the fluid 108.The sensor device 100 has a data processing device 250 for receiving and evaluating a pressure signal 112 representing the pressure p and for receiving and evaluating a temperature signal 122 representing the temperature T. For this purpose, the data processing device 250 is connected to the pressure sensor 110 and the temperature sensor 120 in a cable-bound manner according to FIG. 2.The data processing device 250 is configured to determine the height level information 102 on the basis of the pressure signal 112. If approximately incompressible oil is used as the fluid 108, in a gas pressure damper as the shock absorber 105 only the volume V of the gas 109 plays a role in calculating the pressure p. Thus, a relatively thin piston rod has a strong influence on the pressure change within the shock absorber 106. At constant temperature T, the product of pressure p and volume V is constant: pV=const. The data processing device 250 is furthermore configured to determine a quasi-static contribution pQ to the pressure p on the basis of the pressure signal 112 and to determine the height level information 102 on the basis of the quasi-static contribution pQ. In addition, the data processing device 250 is configured to ascertain a dynamic contribution pD to the pressure p on the basis of the pressure signal 112. The data processing device 250 can thus separate the quasistatic contribution pQ to the pressure p and the dynamic contribution pD to the pressure p from one another. Known numerical methods can be used for this purpose in order to perform a statistical analysis of the pressure signal 112 and, for example, to determine an average value as a quasistatic contribution pQ to the pressure p.The data processing device 250 is furthermore configured to determine the elevation information 102 taking into account a temperature signal 122 representing the temperature T. In this case, the ratio of the product of pressure p and volume V and temperature T is constant: pV / T=const.The data processing device 250 is configured to calibrate, re-calibrate, and / or determine a state Z of the shock absorber 105 based on the predetermined operating states Z 1, Z 2 of the shock absorber 105 and / or based on the predetermined operating states Z 1, Z 2. In this case, a well-defined operating state Z 1, Z 2 can be assumed, for example defined by a predetermined deflection point A 1, A 2, and the pressure p can be measured in this operating state Z 1, Z 2. The pressure p measured in the operating state Z 1, Z 2 then serves as a reference. The predetermined operating states Z 1, Z 2 are each defined by a deflection point A 1, A 2, for example by the operating states Z 1, Z 2 shown in sections (A) and (B).FIG. 3 schematically illustrates a sensor device 105 according to an aspect of the disclosure. In this case, FIG. 3 shows an alternative embodiment to FIG. 2. FIG. 3 will be described with reference to FIG. 2, wherein only the differences of the shock absorbers 105 of FIGS. 2 and 3 will be described.The pressure sensor 110 and the temperature sensor 120 are each arranged within the container tube 106 and are configured for the wireless transmission of the pressure signal 112 to the data processing device 250. In this case, the pressure sensor 110 and the temperature sensor 120 can have a battery as a power source and can be connected to the data processing device 250 by communication technology via a comparatively energy-saving wireless connection, for example via Bluetooth Low Energy (BLE) and / or via a wireless local area network (WLAN).In another embodiment (not shown), only the pressure sensor 110 or only the temperature sensor 120 is arranged within the container tube 106 and the temperature sensor 120 is arranged as described and / or shown with reference to FIG. 2 or only the temperature sensor 120 is arranged within the container tube 106 and the pressure sensor 110 is arranged as described and / or shown with reference to FIG. 2.FIG. 4 schematically illustrates a flow diagram of a method 300 according to an aspect of the disclosure. The method 300 according to FIG. 4 is a method 300 for determining an elevation information 102 for a vehicle 200 a, 200 b. Such a vehicle 200 a, 200 b, a pneumatic suspension system 260 of such a vehicle 200 a, 200 band a sensor device 100 of such a vehicle 200 a, 200 bare described with reference to FIGS. 1 to 3. FIG. 4 will be described with reference to FIGS. 1 to 3.The method 300 according to FIG. 4 comprises: detecting 310 a pressure signal 112 representing a pressure p within a shock absorber 105 of a pneumatic suspension system 260.The method 300 comprises: determining 320 elevation information 102 on the basis of the pressure signal 112.The method 300 comprises: outputting 330 the elevation information 102.In this case, the skilled person recognizes that the method 300 according to FIG. 4 can also be carried out in a sequence other than the sequence shown. In particular, it is possible that steps of the method 300 can be interchanged, shifted and / or carried out simultaneously.FIG. 5 is a schematic illustration of a computer program and / or computer readable medium in accordance with an aspect of the disclosure. The computer program and / or computer readable medium 400 comprises instructions (not shown) which, when the program or instructions are executed by a data processing device 250, cause the latter to carry out the method 300 and / or the steps of the method 300 according to FIG. 4.The commands can be present as a program code in any code or in any language, in particular in a code suitable for controlling and / or monitoring vehicles 200 a, 200 band / or pneumatic suspension systems 260. The computer program and / or computer readable medium 400 may be or include any digital data storage device, such as a USB stick(s), a hard disk, a CD-ROM, an SD card, or an SSD card. The computer program does not necessarily have to be stored on such a computer-readable storage medium, but can also be retrievable via the Internet or in some other way. In the vehicle 200 a, 200 b, the commands can also be stored in an internal memory of a data processing device 250 embodied as a microcontroller and thus in the form of SRAM, DRAM, flash rom, EPROM or EEPROM.Reference Sign (Part of Description):100 Sensor device 102 height level information 105 shock absorber 106 container pipe 107 through-opening 108 fluid 109 gas 110 pressure sensor 112 pressure signal 120 temperature sensor 122 temperature signal 125 housing 130 dust protection 131 receptacle 132 piston rod 133 working piston 134 piston valve 135 cylinder 136 base valve 200 avehicle 200 bvehicle 200 cant vehicle 250 data processing device 260 pneumatic suspension system 300 method 310 detecting 320 determining 330 outputting 400 computer program and / or computer-readable medium A 1, A 2 deflection point O upper section p pressure pD dynamic contribution to the pressure pQ quasistatic contribution to the pressure T temperature U lower section vol volume Z state Z 1, Z 2 operating statesReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedWO 2023 / 041 475 A1 [0006,0007]EP 4 020 012 A1

[0008]

Claims

Sensor device (100) for determining an elevation information (102) for a vehicle (200a), in particular commercial vehicle (200b), comprising: - a shock absorber (105) for a pneumatic suspension system (260) of the vehicle (200a) and having a pressure sensor (110) for sensing a pressure (p) within the shock absorber (105), and - a data processing device (250) for receiving and evaluating a pressure signal (112) representing the pressure (p), wherein the data processing device (250) is configured to determine the elevation information (102) on the basis of the pressure signal (112).Sensor device (100) according to Claim 1, wherein - the shock absorber (105) has a container tube (106) having a through opening (107) and a fluid (108) having the pressure (p) arranged in the container tube (106), and - the pressure sensor (110) is arranged within the through opening (107).Sensor device (100) according to Claim 1, wherein - the shock absorber (105) has a container tube (106) with a fluid (108) with the pressure (p) arranged in the container tube (106), and - the pressure sensor (110) is arranged within the container tube (106) and is configured for the wireless transmission of the pressure signal (112) to the data processing device (250).Sensor device (100) according to one of the preceding claims, wherein the data processing device (250) is configured to determine a quasi-static contribution (pQ) to the pressure (p) on the basis of the pressure signal (112) and to determine the elevation information (102) on the basis of the quasi-static contribution (pQ).Sensor device (100) according to one of the preceding claims, wherein the data processing device (250) is configured to determine a dynamic contribution (pD) to the pressure (p) on the basis of the pressure signal (112).Sensor device (100) according to one of the preceding claims, wherein - the sensor device (100) has a temperature sensor (120) for sensing a temperature (T) of the shock absorber (105), and - the data processing device (250) is configured to determine the level information (102) taking into account a temperature signal (122) representing the temperature (T).Sensor device (100) according to Claim 6, wherein - the shock absorber (105) has a container tube (106) with a fluid (108) with the pressure (p) arranged in the container tube (106), and - the temperature sensor (120) is arranged within the container tube (106) and / or is configured to sense the temperature (T) of the container tube (106).Sensor device (100) according to one of claims 6 and 7, wherein the pressure sensor (110) and the temperature sensor (120) are integrated in a housing (125).Sensor device (100) according to one of the preceding claims, wherein the data processing device (250) is configured to calibrate, calibrate and / or calibrate the determination of the height level information (102) on the basis of predetermined operating states (Z1, Z2) of the shock absorber (105) and / or to determine a state (Z) of the shock absorber (105) on the basis of the predetermined operating states (Z1, Z2).Sensor device (100) according to Claim 9, wherein the predetermined operating states (Z1, Z2) are each defined by a deflection point (A1, A2).Method (300) for determining an elevation information (102) for a vehicle (200a), in particular a commercial vehicle (200b), wherein the method (300) comprises: - detecting (310) a pressure signal (112 representing a pressure (p) within a shock absorber (105) of a pneumatic suspension system (260) of the vehicle (200a), - determining (320) an elevation information (102) on the basis of the pressure signal (112), and - outputting (330) the elevation information (102).A computer program and / or computer readable medium (400) comprising instructions which, when the program or instructions are executed by a data processing device (250), cause the latter to perform the method (300) according to claim 11 and / or the steps of the method (300) according to claim 11.Data processing device (250) for a vehicle (200a), in particular a commercial vehicle (200b), wherein the data processing device (250) is configured to carry out the method (300) according to claim 11.Pneumatic suspension system (260) for a vehicle (200a), in particular a commercial vehicle (200b), comprising a sensor device (100) according to one of Claims 1 to 10.Vehicle (200a), in particular commercial vehicle (200b), having a pneumatic suspension system (260) according to Claim 14 and / or having a sensor device (100) according to one of Claims 1 to 10.

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