SE2050568A1 - Pressure sensor for a personal protection system in a vehicle - Google Patents

Abstract

The invention relates to a pressure sensor (10A, 10B) for a personal protection system of a vehicle, comprising a sensor housing (20) and base plate (12) arranged inside the sensor housing (20, on which a measuring unit (14) is arranged and which comprises a pressure sensor element and a sensor circuit, as well as a corresponding pressure sensor device (1) for a personal protection system of a vehicle comprising at least one such pressure sensor (10, 10A), here the sensor housing (20) forms at one first end a plug (20A) and at a second end a measuring space ( 28) in which a pressure to be measured prevails, the base plate (12) separating the plug contact (20A) fluidly from the measuring space (28), the pressure sensor element and the sensor circuit being arranged in a common housing and the pressure sensor element being fluidly connected to the measuring space (28) via a pressure inlet channel. ).

Description

The invention is based on a pressure sensor for a personal protection system for a vehicle of the type specified in main claim 1. Another object of the present invention is the corresponding pressure sensor device for a personal protection system of a vehicle comprising at least one such pressure sensor.

For the detection of pedestrian accidents, sensor systems are used that are built into the vehicle bumper. Systems based on two or more acceleration sensors (PCS - Pedestrian Collision Sensor) are very common. Recently, pressure pressure tube (PTS) systems have been made available. Such a pressure hose-based system usually comprises two pressure sensors which are connected to each other by an air-filled air hose. The pressure sensors for a one-person protection system of a vehicle comprise a sensor housing and a base plate which is arranged inside the sensor housing and on which a measuring unit is arranged, which comprises a pressure sensor element and a sensor circuit. In this case, the pressure hose in the transverse direction of the vehicle is inserted into a recess in a foam of a bumper, which is arranged between a bumper housing and a bendable transverse element of the vehicle. The bendable transverse element serves as a stop in the event of a collision. Width pressure sensors are further distinguished between two housing variants. An O-degree variant, which is either screwed to a vehicle structure or directly embedded in the foam, as well as a 90-degree variant which is exclusively embedded in the foam. Both housing variants are relatively large in relation to the size of the measuring unit.

In the pressure hose-based system, the collision with an object in the relevant area of the bumper leads to a signal rise inside the detecting pressure sensors, whereby both the bumper housing and the foam, as well as the pressure hose arranged here, are compressed. The amplitude of the detected signals depends, among other things, on the mass and the speed of the colliding object. In practice, however, it may happen that a classic installation of a pressure hose-based system in the front of the vehicle is not always possible due to the vehicle construction. This means that, for example, when installing the pressure hose-based system in the vehicle front, the two external pressure sensors can not be attached optimally in the vehicle structure, since there are no optimal conditions for installation. Description of the invention The pressure sensor for a personal protection system of a vehicle the corresponding pressure sensor device is found to be significantly smaller than a pressure sensor known from the prior art for pedestrian and / or frontal collision detection for a personal protection system. The through-embodiments of the pressure sensor according to the invention can save on manufacturing steps and costs, whereby space and weight in the vehicle are reduced. In addition, embodiments of the pressure sensor according to the invention can be used for a personal protection system of a vehicle both in a pressure hose-based system in the vehicle front and also for side collision detection in a vehicle door and a side cladding of the vehicle, respectively.

In embodiments of the present invention, a pressure sensor for a vehicle is proposed comprising a sensor housing and a base plate arranged inside the ice sensor housing, on which a measuring unit is arranged, which comprises a pressure sensor element and a sensor circuit. In this case, the sensor housing forms a socket at a first end and at a second end a measuring space in which a pressure to be measured prevails. The base plate fluidly separates the plug from the measuring space, wherein the pressure sensor element and the sensor circuit are arranged in a common housing and the pressure sensor element is fluidly connected to the measuring space via a pressure inlet channel.

In addition, a pressure sensor device for a personal protection system of a vehicle is proposed, which comprises at least one such pressure sensor which determines the pressure in a predetermined pressure chamber in the vehicle.

In the present case, a sensor circuit can mean an electrical and / or electronic circuit which converts the detected physical quantity, here the pressure, into sensor signals and further processes or evaluates these. The sensor circuit can be designed, for example, as an application-specific integrated circuit (ASIC). The sensor circuit designed as an ASIC can be attached to the base plate and at the same time, for example by a soldering process or a process with conductive glue, connected to a contact pin. The pressure sensor element is located on the ASIC itself and can be connected to the ASIC through bond wires. The sensor signals detected by the pressure sensor naked are output to, for example, a control device, in particular an airbag control device, which processes or evaluates detected sensor signals. The emitted signals can be further processed inside the control device by algorithms. If the algorithm detects that a collision or a pedestrian collision has taken place, after this release decision, active restraining means (eg airbag) in the vehicle are activated to spring away the pedestrian collision with the vehicle front or to protect the passengers in the event of a collision. To perform the necessary classification within the algorithm, the processed signals (raw signals, window integrals, integrals, derivative, etc.) can be compared, for example, against threshold values. If a preset number of relevant signals exceeds their threshold values, the corresponding restraining means in the vehicle can be switched on.

The control device may have at least one interface which may be designed as a single hardware and / or software. When designed as a hardware, the interfaces can, for example, form part of a so-called system ASIC which contains the most different functions of the control device. However, it is possible that the interfaces are separate, integrated switching circuits or at least partly consist of different components. In the case of a design as software, the interfaces can be software modules, which are present, for example, on a microcontroller in addition to other software modules. Also advantageous is a computer program product with program code which is stored on a machine-readable carrier such as a semiconductor memory, a hard disk memory or an optical memory and which is used for performing the evaluation when the program is executed by the control device.

Measures and further developments specified in the subclaims make advantageous improvements possible to the pressure sensor for a personal protection system of a vehicle specified in main claim 1 and of the pressure sensor device for a personal protection system of a vehicle specified in main claim 14.

It is particularly advantageous that at least one contact pin is arranged in the socket, which with one end is embedded in the base plate and which is in contact with the sensor circuit. The at least one contact pin can for instance be added to the wide-injection molding process for manufacturing the base plate. The sensor circuit can be connected to said at least one contact pin by means of a soldering method or a method with conductive glue.

In an advantageous embodiment of the pressure sensor, the molding compound can surround the pressure sensor element and the sensor circuit as a housing, the pressure inlet duct being arranged in the molding compound. In this way, the pressure sensor element and sensor circuit can be protected against slipping and against environmental impact. By casting the sensor circuit and the pressure sensor element directly on the base plate, the additional module housing used in the prior art (LGA: Land GridArray, respectively SOIC) for the measuring unit is advantageously eliminated. Thereby, additional costs can be saved for an additional packaging cut. As an alternative, the sensor circuit and the pressure sensor element are pre-assembled in a further modular housing (LGA or SOIC) and soldered together with the base plate or with the at least one contact pin. The molding compound on the base plate can in this case be disposed of. Although this does not save much cost, today's LGA or SOIC can be reused with pressure sensor elements or sensor circuit and only an adaptation of the housing is required for the implementation of the invention.

In a further advantageous embodiment of the pressure sensor, a rotation securing device can be arranged on the circumference of the sensor housing. As a result, when used in a pressure hose-based system, the pressure sensor can be inserted in a rotationally secure manner into the vehicle front in the vehicle's bumper foam.

In a further advantageous embodiment of the pressure sensor, an insertion zone product can be arranged at the other end of the sensor housing. Through this insertion zone the edge pressure sensor is easily inserted into the corresponding end of the pressure hose. In addition, the edge pressure hose that is pushed up on the insertion zone may ensure lifelong sliding through a cable tie. In addition, an insert bevel may be formed on the insertion zone to facilitate or facilitate the pushing of the pressure hose or the insertion of the insertion zone.

In a further advantageous embodiment of the pressure sensor, the sensor housing can be designed in several parts. In this case, a first housing part can form the plug and the measuring space, which can be closed with a passage from a second housing part which through a connecting element can be connected to the first housing part. Advantageously, the connecting element can also form the rotation fuse. The connecting element can for instance be designed as a clip closure whereby the first housing part of the pressure sensor can be connected to the second housing part of the pressure sensor to form a unit pressure sensor. A silicone seal can be arranged between the housing parts, which seals the measuring space outwards.

In a further advantageous embodiment of the pressure sensor, the second housing part can be designed as an insertion sleeve with a connecting channel for flow to the measuring space. Through the connecting duct, air in the pressure hose can flow into the interior of the sensor. In addition, the push-on hose pushed on the insertion sleeve can be secured for life against slipping by a cable tie. In addition, a single-insert chamfer can be made on the insertion sleeve to simplify or facilitate the pushing of the pressure hose and the insertion of the insertion sleeve, respectively. When mounted, the embodiment of the pressure sensor is not significantly thicker than the actual pressure hose. Ideally, the outer diameter of the housing or the first housing part or the plug corresponds to the outer diameter of the pressure hose.

In an alternative embodiment, the second housing part can be designed as a lid with an opening for passage to the measuring room. Through the opening, air from the pressure chamber can flow into the interior of the sensor. This embodiment of the pressure sensor can be used, for example, for a side impact detection in a vehicle door or in a side trim of the vehicle.

In a further advantageous design of the pressure sensor, the sensor housing or the respective housing parts can be designed as injection molded components of synthetic material. In addition, the base plate can be formed in one piece together with sensor housing or with the first housing part as injection molded components of synthetic material. especially cost-saving production of the pressure sensor summer mass product. As an alternative, the base plate can be designed as a printed circuit board which is fluidly connected to the sensor housing or to the first housing part.

In a further advantageous design of the pressure sensor, the base plate can have at least one pressure equalization element which performs a slow pressure equalization between the measuring space and the plug. Thereby, the pressure equalizing element provides an exchange of the ambient pressure with the internal pressure in the measuring space and in the pressure chamber so that the ambient pressure always prevails in the pressure chamber before a collision.

In a further advantageous design of the pressure sensor device, the edge pressure chamber be formed in a pressure hose, which at its ends is closed by a respective pressure sensor. This pressure sensor device may preferably be inserted in the vehicle front for pedestrian and / or frontal collision detection. For this purpose, the sensor housing can be inserted into the insertion sleeve or insertion zone of the pressure hose, an outer diameter of the socket corresponding to an outer diameter of the pressure hose. The pressure hose and the pressure sensors can, for example, be inserted into a recess in the foam of a bumper, whereby the rotation lock prevents a rotation of the inserted pressure sensors.

In an alternative design of the pressure sensor device, the pressure chamber can be designed a vehicle door or in a side lining of the vehicle, wherein said at least one pressure sensor can be attached to the pressure chamber.

Examples of the embodiment of the invention are shown in the figures and are explained in more detail in the following description. In the figures, the same reference numerals denote components or elements that perform the same or analogous functions.

Brief Description of the Figures Figure 1 shows a schematic perspective sectional view of a section of an example of an embodiment of a pressure sensor device according to the invention for a personal protection system of a vehicle with a first example of an embodiment of a pressure sensor according to the invention for a personal protection system of a vehicle.

Figure 2 shows a schematic perspective sectional view of the pressure sensor according to the invention for a personal protection system for a vehicle from figure 1 in assembled condition.

Figure 3 shows a schematic perspective sectional view of the individual housing parts of the cough pressure sensor according to the invention for a personal protection system for a vehicle from Figures 1 and 2.

Figure 4 shows a schematic perspective sectional view of a second example of an embodiment of the pressure sensor according to the invention for a personal protection system of a vehicle.

Figure 5 shows a schematic perspective sectional view of a third example of the embodiment of the impression sensor according to the invention for a personal protection system of a vehicle in assembled condition.

Figure 6 shows a schematic perspective sectional view of the individual housing parts of the cough pressure sensor according to the invention for a personal protection system of a vehicle from figure 5.

Figure 7 shows a schematic sectional view of an example of an embodiment of the measuring unit for the pressure sensors according to the invention from Figures 1 to 6.

Figure 8 shows a schematic sectional view of an example of an embodiment of a bumper with the pressure sensor device from figure 1.

Embodiments of the Invention As shown in Figures 1 to 8, the examples shown include the construction of a pressure sensor 10, 10A, 10B, 10C according to the invention for a personal protection system of a vehicle each time a sensor housing 20 and a base plate 12 arranged inside the sensor housing 20 and on which a measuring unit 14 is arranged, which comprises a pressure sensor element 14.1 and a sensor circuit 14.2. Here, the sensor housing 20 forms at one first end a plug 20A and at a second end a measuring space 28 in which there is a pressure to be measured. The base plate 12 fluidly separates the plug 20A from the measuring space 28, the pressure sensor element 14.1 and the sensor circuit 14.2 being arranged in a common housing and the pressure sensor element 14.1 being fluidly connected to the measuring space 28 via a pressure inlet channel 14.3.

As can further be seen from Figures 1 to 7, the housing 20 in the embodiments shown is embodied as a hollow cylinder in one or more parts, in which a single-disc-shaped base plate 12 is arranged. In addition, a rotation lock 25 is arranged on the outer circumference of the housing 20, which is designed as a projection projecting from the circumference of the housing 20. In addition, in the illustrated examples of the embodiment of the impression sensor 10, 10A, 10B, 10C according to the invention, two contact pins 26 are arranged in the socket 20A, which with one respective end are embedded in the base plate 12 and are in contact with the sensor circuit 14.2.

As can further be seen from Figures 1 to 7, the insertion pins 26 are arranged in the base plate 12 of the pressure sensor 10, 10A, 10B, 10C and provide an electrical contact with the sensor circuit 14.2. In the embodiments shown, the sensor circuit 14.2 is designed as an ASIC which is attached to the base plate 12 and connected at the same time, for example by a soldering method or an adhesive process, with the contact pins 26. On the sensor circuit 14.2 designed as an ASIC, the pressure sensor element 14.1 is threaded. is connected to the sensor circuit 14.2 designed as an ASIC. In order to protect the sensor circuit 14.2 designed as an ASIC and the pressure sensor element 14.1 against slipping as well as against environmental impact, both it and an ASIC designed sensor circuit 14.2 as well as the pressure sensor element 14.1 are surrounded by a molding compound18. In the molding compound 18, however, there is a small pressure inlet duct 14.3 so that air from the measuring chamber 28 can press against the pressure sensor element 14.1. A pressure equalizing element 16 is also arranged on the base plate 12. The pressure equalizing element 16 provides a slow exchange between the ambient pressure in the socket 20A and the internal pressure in the measuring space 28 so that the ambient pressure always prevails in the measuring space 28 before a collision. In the embodiments shown, the pressure equalizing element 16 is arranged in the middle of the base plate 12. The pressure equalizing element 16 can of course also be arranged in another way so that a meaningful arrangement of the sensor circuit 14.2 and of the pressure sensor element 14.1 on the base plate 12 with corresponding plug contact is possible.

As further appears from Figure 1, the illustrated example of an embodiment of a pressure sensor device 1 according to the invention for a personal protection system of a vehicle comprises at least one pressure sensor 10, 10A as the determining pressure in a predetermined pressure space 3 in the vehicle. In the embodiment shown, the pressure chamber 3 is formed in a pressure hose 5 which is closed at its respective ends with a pressure sensor 10, 10A. Figure 1 shows one end of the pressure hose 5 with a pressure sensor, 10A which closes the end of the pressure hose 5.

As further appears from Figures 1 to 3, the sensor housing in the first example shown in the embodiment of the pressure sensor 10A is made in several parts. Here, a first housing part forms the plug 20A and the measuring space 28, which is closed by a second housing part with a passage 24. The second housing part is connected to the first housing part via a connecting element 25A. The sensor housing 20 or the individual housing parts are in the illustrated embodiments designed as respective injection molded components of synthetic material. In the illustrated first embodiment, the connecting element 25A simultaneously forms the rotation fuse 25. For this purpose, the second housing part is designed as an insertion sleeve 20B on which the pressure hose 5 has been slid or which is inserted in the pressure hose 5. In addition, the pushed pressure hose 5 in the embodiment shown is secured against sliding by a fastening element 7 formed as a cable tie. In addition, in the illustrated embodiment, an insertion bevel 22 is formed on the insertion sleeve 20B, which simplifies or facilitates the pushing of the impression hose 5 and the insertion of the insertion sleeve 20B, respectively. The insertion sleeve 20B comprises a connecting channel 20A as a passage 24 which connects the mounted state in the interior of the sensor between the two housing parts forming the measuring space 28 of the pressure sensor 10A with the pressure space 3 in the pressure hose 5. In the illustrated embodiment the base plate 12 is The injection molded connection to the base plate 12 of synthetic material is the socket 20A which corresponds to a standard insertion housing. The two contact pins 26 are inserted into the base plate 12 of the sensor during the injection molding process. The contact pins 26 are in contact with the sensor circuit 14.2. on the base plate 12 through a counter-plug contact not shown in the figures with a corresponding control device not shown in the figures. As an alternative, the base plate 12 may be formed as a printed circuit board which is fluidly connected to the first housing part and the sensor circuit 14.2 and communicates with the contact pins 26. In the illustrated embodiment the connecting element 25A is formed as a clip closure, whereby the plug 20A of the pressure sensor 10A is connected to insert 20 to form a unit pressure sensor. As further shown in Figure 1, the pressure sensor 10A in the assembled state is not substantially thicker than the actual pressure hose 5, ideally an outer diameter of the plug 20A substantially corresponds to an outer diameter of the pressure hose 5. Between the housing parts a seal for sealing the measuring space 28 outwardly inserted.

As can be seen from Figure 4, in the second example shown, the housing 10 is made in a single part by the pressure sensor 10B. Here, the sensor housing 20 at the first end of the plug 20A and at the other end forms an insertion zone 20C with the measuring space 28 in which the pressure to be measured prevails. Analogously to the first embodiment, the pressure hose 5 can be pushed up on the insertion zone 20C or the insertion zone 20C can be inserted into the pressure hose 28 is directly connected to the pressure chamber 3 in the pressure hose 5. In addition, the pushed-on pressure hose 5 can be secured against sliding by a fastening element 7 designed as a cable tie. To facilitate the insertion of the insertion zone 20C and the pushing of the pressure hose 5, respectively, a single insertion bevel can be formed at the insertion zone 20C. Also the second example of design of the pressure sensor 10B according to the invention is in mounting condition not substantially thicker than the actual pressure hose 5. Ideally, the outer diameter of the plug 20A corresponds to the outer diameter of the pressure hose 5. In the illustrated embodiment, the base plate 12 is likewise made in a single piece 20 as an injection molded component of synthetic material. As an alternative, the base plate 12 may be formed as a printed circuit board which is fluidly connected to the housing 20 and the sensor circuit 14.2 and is in contact with the plug pins 26.

As further shown in Figure 8, the pressure hose 5 and the invisible pressure sensors 10A, 10B therein can be inserted into a recess 34.1 in the foam 34 of a bumper 30, the rotation lock 25 preventing a rotation of the inlet pressure sensors 10A, 10B. As can further be seen from Figure 8, the thrust pressure hose 5 in the foam 34 lies between a bumper housing 36 and a flexible cross member 32 of the vehicle, which in the event of a collision serves as a stop. Here the conductor collision with an object within the relevant area of the bumper 30 to the detecting pressure sensors 10 of a signal pitch inside the pressure sensor device 1, whereby both the bumper housing 36 and also the foam 34, 12 as well as the pressure hose 5 contained therein are compressed. The amplitude of the detected signals depends, among other things, on the mass and the speed of the colliding object.

As further appears from Figures 5 and 6, the sensor housing 20 in the third example shown in the embodiment of the pressure sensor 10C is made in several parts. Here, a first housing part which is analogous to the first embodiment forms the plug 20A and the measuring space 28 which is closed by a second housing part with a passage 24. Unlike the first embodiment, the second housing part in the third example of the pressure sensor 10C shown is designed as a lid 20D. opening 24B as a passage 24 to the measuring space 28. In addition, in the embodiment shown, the display pressure sensor 10C does not have a pressure equalization element 16, since the pressure sensor 10C is arranged in a larger pressure space 3 so that during normal operation the ambient pressure as well as in the plug 20A 28 before a collision. The second housing part is similar to the first embodiment via a connecting element 25A, which at the same time acts as a rotation fuse 25, connected to the first housing part. In the exemplary embodiment shown, the housing parts and the base plate 12 are likewise designed as injection-molded components of synthetic material, the base plate 12 being made in one piece with the first housing part. As an alternative, the base plate 12 may be formed as a printed circuit board fluidly connected to the first housing portion and in contact with the sensor circuit 14.2 and the contact pins 26. In the illustrated embodiment, the connecting member 25A is formed as a clip closure through which the connector 20A of the pressure sensor 10C is connected to the cap 20C. . A seal can be inserted between the housing parts for sealing the measuring space 28 outwards. The third example of the design of the pressure sensor 10C can, for example, for side impact detection be arranged in a pressure chamber 3 in a vehicle door or in a side cladding of the vehicle. The installation of the pressure sensor 10C takes place, for example, by snapping into an existing vehicle door structure or body structure.

Claims (18)

A pressure sensor (10, 10A, 10B, 10C) for a personal protection system of a vehicle, comprising a sensor housing (20) and a base plate (12) arranged inside the sensor housing (20), on which a measuring unit (14) is arranged, which comprises a pressure sensor element (14.1) and a sensor circuit (14.2), characterized by the sensor housing (20) forming at a first end a plug contact (20A) and at a second end a measuring space (28), in which a pressure to be measured prevails, the base plate ( 12) separates the plug (20A) fluidly from the measuring space (28), the pressure sensor element (14.1) and the sensor circuit (14.2) are arranged in a common housing and the pressure sensor element (14.1) is fluidly connected to the measuring chamber (28) via a pressure inlet channel (14.3). Pressure sensor (10, 10A, 10B, 10C) according to claim 1, characterized in that at least one contact pin (26) is arranged in the socket (20A), which with one end is embedded in the base plate (12) and establishes contact with the sensor circuit (14.2 ). Pressure sensor (10, 10A, 10B, 10C) according to claim 1 or 2, characterized in that the molding compound (18) surrounds the pressure sensor element (14.1) and the sensor circuit (14.2) as a housing, the pressure inlet duct (14.3) being arranged in the molding compound (18) . Pressure sensor (10, 10A, 10B, 10C) according to one of Claims 1 to 3, characterized in that a rotation lock (25) is arranged on the circumference of the sensor housing (20). Pressure sensor (10, 10B) according to one of Claims 1 to 4, characterized in that an insertion zone (20C) is formed at the other end of the sensor housing (20). Pressure sensor (10, 10A, 10C) according to one of Claims 1 to 4, characterized in that the sensor housing (20) is designed in several parts, a first housing part forming the plug contact (20A) and the measuring space (28), which is closed by a second housing part with a passage 14 (24), which is connected to the first housing part via a connecting element (25A). Pressure sensor (10, 10A, 10C) characterized in that according to claim 6, the connecting element (25A) forms the rotation fuse (25). Pressure sensor (10, 10A) according to claim 6 or 7, characterized in that the second housing part is designed as an insertion sleeve (20B) with a connecting channel (24A) as through a passage (24) to the measuring space (28). Pressure sensor (10, 10C) according to claim 6 or 7, characterized in that the second housing part is designed as a lid (20D) with an opening (24B) as a passage (24) to the measuring space (28). Pressure sensor (10, 10A, 10B, 10C) according to one of Claims 1 to 9, characterized in that the sensor housing (20) or the housing parts are designed as respective injection-molded components of synthetic material. Pressure sensor (10, 10A, 10B, 10C) according to claim 10, characterized in that the base plate (12) is designed as an injection molded component of synthetic material in one piece with the sensor housing (20) or the first housing part. Pressure sensor (10, 10A, 10B, 10C) according to claim 10, characterized in that the base plate (12) is designed as a printed circuit board, which is fluidly connected to the sensor housing (20) or to the first housing part. Pressure sensor (10, 10A, 10B) according to one of Claims 1 to 12, characterized in that the base plate (12) comprises at least one pressure equalization element (16) which provides a slow pressure equalization between the measuring space (28) and the plug contact (20A). Pressure sensor device (1) for a personal protection system of a vehicle, comprising at least one pressure sensor (10, 10A, 10B, 10C) which determines the pressure in a predetermined pressure chamber (3) in the vehicle, characterized in that said at least one pressure sensor (10, 10A, 10B, 10C) is designed according to at least one of claims 1 to 13. Pressure sensor device (1) according to claim 14, characterized in that the pressure chamber (3) is formed in a pressure hose (5) which is connected at its ends by a respective pressure sensor (10, 10A, 10B). Pressure sensor device (1) according to claim 15, characterized in that the insertion sleeve (20B) or the insertion zone (20C) of the sensor housing (20) is inserted into the pressure hose (5), an outer diameter of the plug (20A) corresponding to an outer diameter of the pressure hose (5). ). Pressure sensor device (1) according to claim 15 or 16, characterized in that the pressure hose (5) and the pressure sensors (10, 10A, 10B) are inserted in a recess (34.1) in the ice foam (34) of a bumper (30), the rotation lock (25) ) prevents a rotation of the inserted pressure sensors (10, 10A, 10B). Pressure sensor device (1) according to claim 14, characterized in that the pressure chamber (3) is formed in a vehicle door or a side cladding of the vehicle, said at least one pressure sensor (10, 10C) being fixed in the pressure chamber (3).