Sensor assembly for a vehicle

Abstract

The invention relates to a sensor assembly (1) of a vehicle, comprising a control device (2), a plurality of, in particular identical, sensors (3), a data bus (4) connecting each sensor (3) with the control device (2), and a supply line (5) connecting each sensor (3) with the control device (2) for a voltage supply, wherein each sensor (3) has a voltage divider (30) with at least one resistor (31, 32), wherein a voltage divider output pin (59) of each sensor (3) is connected with a voltage divider input pin (58) of a sensor (3) arranged behind on the data bus (4), respectively, wherein each sensor (3) is provided for detecting a voltage drop (33) on the resistor (32) or between the voltage divider output pin (59) and a ground line (50), and wherein the control device (2) is provided for assigning an individual geographical address to each sensor (3) based on the voltage drops (33) of all sensors (3).

Description

TECHNICAL FIELD

[0001] The application relates to a sensor assembly for a vehicle and to a method for addressing sensors of the sensor assembly. BACKGROUND

[0002] Sensor assemblies for assistance systems, for example parking assistance systems, of a vehicle are known, which sensor assemblies comprise a plurality of usually identical ultrasonic sensors. Before the assistance system is initially put into operation or when using individual sensors, the sensors need to be correctly addressed in order to be able to assign the sensor data of each sensor to the correct physical position relative to the other sensors. For this purpose, usually expensive hardware and / or complex calibration processes are required. SUMMARY

[0003] In contrast thereto, the sensor assembly according to the application is distinguished in that the addressing of the sensors is achieved in a particularly simple manner and by means of simple and cost-advantageous hardware. This is achieved by a sensor assembly comprising a control device, a plurality of sensors, a data bus connecting each sensor with the control device for data transmission and a supply line connecting each sensor with the control device for voltage supply. Preferably, the voltage supply is understood in this case in such a way that the source of electrical energy for providing the voltage supply of the sensors is integrated into the control device. Preferably, instead, an independent source of electrical energy, for example a vehicle battery, can also be provided for providing the voltage supply of the sensors. For example, in the case of such a separate source of energy, the voltage supply of the sensors can be achieved by means of the control device, wherein the control device is provided, inter alia, for interrupting the voltage supply and switching on to the sensors. Preferably, here all sensors are connected to the control device by means of the supply line and / or the data bus in a parallel circuit. Here, each sensor has a voltage divider, which has at least one resistor. Here, the voltage divider output pin of each sensor is connected to the voltage divider input pin of the sensor which is arranged, inter alia, behind the control device on the data bus. Here, each sensor is provided for detecting the voltage drop over the resistor or the voltage drop between the voltage divider output pin and a ground line. Furthermore, the control device is provided for assigning an individual geographical address to each sensor on the basis of the voltage drop of all sensors. Here, an address is considered a geographical address by means of which the control device can recognize the order of the sensors on the data bus. Preferably, the control device is provided here for taking the magnitude of the voltage drop over the respective resistor and assigning the geographical address on the basis of the magnitude of the voltage drop. In particular, for this purpose all sensors are simultaneously manipulated by means of the control device.

[0004] In other words, each of the sensors has a voltage divider by means of which the voltage is divided sequentially along the chain of sensors arranged one after the other on the data bus. In particular when each voltage divider of each sensor has exactly one resistor, the respective resistors of all the linked sensors form a voltage divider. In particular, in this case, the voltage drop on the voltage divider output pin, i.e. the voltage drop between the two resistors arranged one after the other, in particular in series, and the ground line, is detected respectively. Preferably, in this case, the voltage divider output pin of the last sensor on the data bus is connected to the ground line. In the case of each sensor that is further away from the control device, the voltage divided by means of the voltage divider respectively becomes smaller. In particular when each voltage divider has two resistors, for each sensor the voltage drop over the respective resistors decreases along the data line.

[0005] Thereby, the different sensors on the data bus can be distinguished from one another in a simple manner by means of the detection of the voltage drop. In particular, thereby the order of the sensors on the data bus can be determined. On the basis of this information, each sensor can be assigned a respective individual geographical address, so that the sensor data generated by the sensor can be uniquely assigned to a location. Here, the geographical addresses of the sensors can be assigned centrally by means of the control device. Alternatively or additionally, each sensor can be provided for assigning a geographical address to itself or to all sensors.

[0006] By means of this geographical addressing, the sensor device can uniquely assign a predefined location on the data bus to the sensor data transmitted by a certain sensor via the data bus. Preferably, for example when the sensor assembly is part of a parking guide system, the control device can thereby identify which sensor assembly of the sensors is in which position in the bumper cover of the vehicle, whereby for example the direction of an obstacle detected in the environment of the vehicle can be determined. For example, thereby a display with lateral resolution can be operated by means of the control device for visually displaying the location of the obstacle.

[0007] In particular, it is hereby assumed that the topology of the data bus is known. In other words, the sensor assembly has a plurality of sensor receptacles on which respectively a sensor is arranged, in particular in the direction of the data bus, wherein the sensor receptacles are arranged at predefined / previously known positions relative to one another.

[0008] The sensor assembly provides the advantage that, in the case of a uniquely unambiguous geographical assignability from the geographical address to the sensor, a parallel wiring of all sensors with respect to the supply line is possible. It is thereby, for example, not necessary that the supply line has to be circulated through each sensor via a switching element or the like, which can lead to a voltage loss. This type of direct connection of each sensor directly with the supply line results in that each sensor obtains an optimum voltage supply. In particular, the internal resistance of the sensor or components of the sensor have no or only a small influence on the voltage supply of the sensor, for example, for sensors which are arranged laterally on the data bus, i.e. further away from the control device.

[0009] Preferably, the supply line and the data bus can be provided as separate cables. Alternatively, it is also possible that the supply line and the data bus are merged in a common cable, which is preferably guided into the sensor on a unique pin.

[0010] The data bus can preferably have a unique data line, to which each of the sensors is connected. Alternatively, the data bus can also have two or more data lines, wherein each sensor is connected with each data line.

[0011] Preferably, the sensors are identical, i.e. identically constructed, but wherein in particular each sensor can have an individual sensor marking, for example an individual serial number.

[0012] Thus, by connecting the sensors with the control device via the data bus, the control device can be put into communication with the control device at particularly low hardware expenditure, in particular without the need for individually wiring each sensor with the control device via a separate line.

[0013] The following preferred extensions of the application.

[0014] Preferably, an addressing input pin of the first sensor on the data bus, in particular from the control device, is connected with the supply line device. Thereby, a supply voltage is applied on the first input of the first sensor. In particular, each sensor has a supply input pin, which is connected with the supply line, respectively. Preferably, a sensor component of the sensor, which can be supplied with a supply voltage, is connected with the supply input pin. In particular, a short line section on the first sensor can be used as a branch of the supply line here, whereby a particularly simple and cost-advantageous construction of the sensor assembly can be achieved.

[0015] It is particularly preferred that the voltage divider has exactly one resistance, wherein the voltage divider output pin of the last sensor on the data bus is connected to the ground line. In particular, in this case the respective resistance of all linked sensors forms a voltage divider, respectively. Thereby, in the case of each sensor which is located further away from the control device, the voltage divided by means of the voltage divider, respectively, becomes smaller. Thus, by means of a particularly simple and cost-advantageous manner, the sequence of the sensors can be determined by means of the linked resistances.

[0016] Preferably, each voltage divider has two resistances. The center tap of each voltage divider between the two resistances is connected to the voltage divider input pin of the sensor which is arranged later on the data bus, respectively. This means that the center tap of each voltage divider is connected to the voltage divider output pin of the respective sensor. By means of the two resistances of each voltage divider, a falling voltage along the linked sensors on the data bus can be detected in a particularly simple manner and unambiguously, so that the sequence can be determined. Advantageously, a voltage drop on at least one of the two sensors can be detected here.

[0017] It is particularly preferred that the ground line is connected to the ground pin of each sensor. Here, the first resistance of the voltage divider is connected to the voltage divider input pin of the sensor, and the second resistance of the voltage divider is connected to the ground pin. In particular, the first resistances of all sensors of the sensor assembly form a resistance chain here. This means that the first resistances of all sensors are connected to one another in series. Thereby, a series connection of the sensors can be realized by means of the voltage dividers in a particularly simple manner.

[0018] Preferably, each sensor is provided for detecting a voltage drop on the second resistance of the respective voltage divider, which is connected to the ground pin. Since the voltage drop on the second resistance can be measured here with respect to the ground potential simply and accurately, a particularly simple, reliable and accurate detection of the voltage drop is produced.

[0019] It is particularly preferred that the first resistance value of the first resistance is smaller than the second resistance value of the second resistance. Thereby, in the case of a possibility of accurately detecting the voltage drop, preferably on the second resistance, it is achieved that there is a sufficiently high current flow in the resistance of the voltage divider of the sensor which is located later on the data bus, i.e. further away from the control device, so that the voltage drop can be reliably detected. Preferably, the first resistance value is at most 99.5% of the second resistance value, in particular at most 75% of the second resistance, preferably 50% of the second resistance.

[0020] It is further preferred that at least one resistance of each voltage divider is configured high ohmically, such that the detection of the voltage drop is accomplished with as low additional energy consumption as possible compared to the operation of the sensor. Preferably, the resistance value of each resistance is at least 500 Ω, in particular at least 1000 Ω.

[0021] It is particularly preferred that the supply line and / or the data bus is configured as a single piece line, in particular a common single piece line, wherein each sensor is connected with the single piece line, in particular the common single piece line, by means of a connection element. Thus, in particular, the connection element can have a connection line and a so-called splice, which is configured for connecting the connection line with the single piece line. Thereby, a particularly high flexibility of the sensor assembly can be provided, since, for example, an arbitrary number of sensors can be "spliced" at an arbitrary point of the unique line, without the single piece line having to be replaced, in particular.

[0022] Preferably, the supply line and / or the data bus is guided through each sensor, preferably by means of an input pin and an output pin for each sensor, respectively. In particular, the supply line and / or the data bus is thereby divided into a plurality of individual subsections. Preferably, the supply line and / or the data bus is guided through each sensor such that the voltage supply and / or the data exchange is still realized as in the case of a parallel circuit of the sensors. That is to say, within the sensor, for example on a circuit board of each sensor, the voltage tapping is made such that the sensor components of all sensors to be supplied with voltage are still connected in parallel with respect to the voltage supply of the control device. Similarly, the data exchange can be made in parallel with respect to the control device. Thereby, all interfaces of the sensors can be connected by means of the pins, whereby the sensors do not need to be attached to the supply line and / or the data bus by means of additional connection lines and splices. Depending on the structure of the sensor assembly, a cost advantage can thereby be produced.

[0023] Preferably, the sensor is an ultrasonic sensor. Thus, the sensor assembly is in particular an ultrasonic system, which can be used for distance detection. For example, the sensor assembly can be used for distance detection of a parking pilot system or another driver assistance system. Preferably, the ultrasonic sensors are fastened in fixed positions in a cover of a vehicle. In particular, the ultrasonic sensors are thereby fastened in a bumper of the vehicle, wherein for each bumper, preferably a minimum of 2 and a maximum of 12 ultrasonic sensors are provided.

[0024] Further, the application results in a method for addressing sensors of a sensor assembly. Preferably, the sensor assembly is the sensor assembly described above.

[0025] The sensor assembly has a control device, a plurality of sensors, which are preferably identically constructed, i.e. in particular identically structured, a data bus, which connects each sensor to the control device, and a supply line, which connects each sensor to the control device for voltage supply. Each sensor has a voltage divider, which has at least one resistor. Here, each sensor's voltage divider output pin is connected to the sensor's voltage divider input pin arranged last on the data bus, respectively.

[0026] Here, the method comprises the following steps:

[0027] - operating all sensors,

[0028] - determining the voltage drop on the resistor or between the voltage divider output pin and the ground line,

[0029] - determining the relative position of the sensors to each other,

[0030] - assigning an individual geographical address to each sensor on the basis of the determined relative position.

[0031] Here, the determination of the relative position of the sensors is achieved on the basis of the detected voltage drops of all sensors.

[0032] By detecting the voltage drop, it can be determined in a simple manner how the sensors are arranged relative to each other, i.e. in which order the sensors are present. By connecting the resistors in a special manner, for each sensor the voltage becomes smaller and smaller from the control device along the sensors arranged on the data bus. Thus, by detecting the voltage drop, it can be inferred in a simple manner the order of the sensors on the data bus. The method thus allows a particularly simple possibility for addressing the sensors, which can be performed automatically in the case of a particularly cost-advantageous and optimized in terms of low electrical losses construction of the sensor assembly.

[0033] Preferably, the method for addressing the sensors is performed exactly once, in particular when the sensor assembly is initially put into operation. Alternatively, the method can be performed each time the sensor assembly is put into operation.

[0034] Preferably, each voltage divider has two resistors. The center tap of each voltage divider between the two resistors is connected to the voltage divider input pin of the sensor arranged last on the data bus, respectively. By means of the two resistors of each voltage divider, the falling voltage along the sensors linked on the data bus can be detected in a particularly simple manner and unambiguously, so that the order can be determined. Advantageously, the voltage drop on at least one of the two sensors can be detected here.

[0035] Preferably, the ground line is connected with the ground pin of each sensor. The first resistor of the voltage divider is connected with the voltage divider input pin of the respective sensor, and the second resistor of the voltage divider is connected with the ground pin. Here, the voltage drop is measured over the second resistor of the voltage divider. Thereby, the voltage drop over all sensors, which is taken for determining the sequence of the sensors, can be measured particularly simply and accurately. In particular, the taken voltage drops can be distinguished from one another particularly simply and unambiguously here, so that the sequence of the sensors on the data bus can be taken simply and reliably.

[0036] It is particularly preferred that, when looking in one direction from the control device, the sequence of the sensors on the data bus is taken based on the decreasing height of the magnitude of the voltage drop. That is to say, from the control device, the sensor on which the highest voltage drop is taken is arranged in the first position of the data bus. Correspondingly, the sensor on which the lowest voltage drop is taken is arranged in the last position of the data bus. Preferably, the geographical addresses are assigned to all sensors here based on the taken sequence. Thus, the taking of the sequence of the sensors and the assignment of the geographical addresses can be carried out reliably and accurately and with particularly low computing effort.

[0037] Preferably, each geographical address assigned is stored in the non-volatile memory of the respective sensor and / or in the non-volatile memory of the control device. For example, thereby only one addressing of the sensors is required. When restarting the sensor assembly, the geographical addresses can be simply read out of the non-volatile memory by means of the control device, so that the sensors do not have to be addressed anew.

[0038] Preferably, based on an unknown and / or changed individual sensor signature, it can be identified that one of the sensors has been replaced, for example in the case of a repair. In response to such an identification, a reassignment of the geographical addresses can preferably be initiated. BRIEF DESCRIPTION OF DRAWINGS

[0039] The application is explained below on the basis of embodiments in conjunction with the drawings. In the drawings, components of the same function are each denoted by the same reference signs. Shown here are:

[0040] Figure 1 a simplified schematic view of a sensor assembly according to a first embodiment of the application,

[0041] Figure 2 a simplified schematic view of a sensor assembly according to a second embodiment of the application, Figure 1 in the installed state on a vehicle cover,

[0042] Figure 3 a simplified schematic view of a sensor assembly according to a second embodiment of the application,

[0043] Figure 4 A simplified schematic view of a sensor assembly according to a third embodiment of the application is shown. DETAILED DESCRIPTION

[0044] Figure 1 A simplified schematic view of a sensor assembly 1 of a vehicle according to a first embodiment of the application is shown. The sensor assembly 1 comprises a control device 2 and a plurality of sensors 3. For example, as shown, the sensor assembly 1 can comprise three sensors 3. Alternatively, any number of sensors 3 is possible, preferably two, four or six sensors 3. The sensors 3 are identical in design, i.e. structurally identical, however can have individual serial numbers which differ from one another. For example, the individual serial numbers can be stored electronically in the sensors. The sensors 3 are ultrasonic sensors which enable the recognition of objects in the environment in the vicinity of the vehicle by emitting and receiving ultrasonic signals.

[0045] As Figure 2 Schematically shown, the sensor assembly 1 can be mounted in a panel 100 of the vehicle (not shown). Here, the sensors 3 are arranged on predefined positions of the panel 100, respectively. In order to be able to spatially assign the sensor data generated by the sensors 3, i.e. for example in order to distinguish whether certain sensor data are generated by the sensor 3 on the left or by the sensor 3 on the right in the driving direction A, it is necessary to geographically address each sensor 3 before starting the environment detection by means of the sensor assembly 1.

[0046] The structural configuration of the sensor assembly 1 and the execution of the addressing of the sensors 3 is described in the following.

[0047] The sensor assembly 1 comprises a supply line 5, a ground line 50 and a data bus 4 having two parallel data lines 41, 42.

[0048] The supply line 5, the ground line 50 and the two data lines 41, 42 are each configured as a single-segment line which connects the sensors 3 with the control device 2. For the connection to the sensors 3, for each line a connection element 45, 51, 54 in the form of a short line segment is provided. Furthermore, each sensor 3 has an input pin 43, 52, 57 for connection to the connection element 45, 51, 54.

[0049] Preferably, the control device 2 can distinguish the sensors 3 from one another by means of the individual sensor signatures. Here, the control device 2 can assign a logical address to each sensor 3 on the basis of the individual sensor signature of each sensor, so that the sensors 3 can be individually addressed and distinguished.

[0050] In Figure 1 In a first embodiment of the application, each sensor 3 has a voltage divider 30 with two resistors 31, 32. Here, the first resistor 31 is connected with the voltage divider input pin 58 of the sensor 3. The second resistor 32 is connected with the ground pin 57 of the sensor 3, which is connected with the ground line 50. Between the two mutually connected resistors 31, 32, there is a center tap 35 of the voltage divider 30. The center tap 35 is connected with the voltage divider output pin 59 of the sensor 3.

[0051] The voltage divider input pin 58 of the first sensor 3 is directly connected with the supply line 5 along the data bus 4 from the control device 2.

[0052] The center tap 35 of the voltage divider 30 is connected with the voltage divider input pin 58 of the sensor 3 arranged behind along the data bus 4 via the voltage divider output pin 59.

[0053] Hereby, a division of the input voltage is carried out on each sensor 3. This means that the output voltage of each sensor 3 between the voltage divider output pin 59 and the ground line 50 is only a part of the input voltage of each sensor 3 between the voltage divider input pin 58 and the ground pin 57. Each sensor 3 is here provided for detecting this output voltage as a voltage drop 33 over the second resistor 32.

[0054] Here, the two resistors 31, 32 are designed as high ohmic, so that the detection of the voltage drop 33 is done with as low additional energy consumption as possible compared to the operation of the sensor 3.

[0055] Furthermore, the first resistance value of the first resistor 31 is smaller than the second resistance value of the second resistor 32. In particular, the second resistor 32 has a resistance value which is twice as large as the first resistor 31.

[0056] Here, the geographical addressing of the sensors 3 can be realized on the basis of the detection of the voltage drop 33 over the respective second resistor 32 of the sensors 3 along the data bus 4, as described below.

[0057] At the beginning, all sensors 3 are actuated by the control device 2. Here, all sensors 3 are actuated simultaneously. Simultaneously, each sensor 3 detects the voltage drop 33 over the second resistor 32 of the voltage divider 30.

[0058] Subsequently, the control device 2 determines the order of the sensors 3 on the data bus 4 on the basis of the detected voltage drops 33. Here, the order of the sensors 3 is determined according to the decreasing size of the magnitude of the voltage drop over the respective second resistor 32. Sensors 3 are classified. That is, for example, sensor 3 with the highest recorded voltage drop 33 is regarded as the first sensor originating from control device 2 and is geographically addressed accordingly. On the other hand, sensor 3 with the lowest recorded voltage drop 33 is regarded as the last sensor originating from control device 2 on data bus 4 and is assigned a corresponding geographical address.

[0059] Here, the sensor assembly 1 and the addressing method stand out for their particularly simple and cost-effective construction and feasibility. A particular advantage is that, even with the voltage supply to all sensors 3 connected in parallel, it is still possible to achieve a unique and definitive identification of the position of the sensors on the data bus 4, so as to determine the relative positions of all sensors 3 to each other.

[0060] Because the voltage supply is implemented in parallel, the same operating voltage can be supplied to all sensors 3. Therefore, the sensor assembly 1 can be expanded with any number of sensors 3, wherein the same voltage can always be supplied to all sensors 3 with a simple and cost-effective instrument construction of the sensor assembly 1.

[0061] The assigned geographic address can then be stored in the non-volatile memory of the control device 2 and / or in the non-volatile memory of the manipulated sensor 3. Alternatively, a memoryless sensor 3 and a memoryless control device 2 can be configured, wherein the addressing is performed each time the sensor assembly 1 is put into operation.

[0062] Figure 3 A simplified schematic view of a sensor assembly 1 according to a second embodiment of the present invention is shown. The second embodiment substantially corresponds to... Figure 1 The first embodiment, the second embodiment has alternative wiring for sensor 3. Figure 3 In the second embodiment, the supply line 5, the ground line 50, and the two data lines 41 and 42 of the data bus 4 are respectively guided through each sensor 3. Here, each sensor 3 has two pins: one input pin 43, 52, 58 and one output pin 44, 53, 63 for each line 5, 41, 42, 50, and additionally, a voltage divider input pin 58 and a voltage divider output pin 59. Here, within the sensor 3, for example on the circuit board of each sensor 3, voltage tapping is always performed such that the structural elements of all sensors 3 to be supplied with voltage are still connected in parallel with respect to the control device 2. Similarly, data exchange can still be performed in parallel with respect to the control device 2. With this structure, connecting lines and branch points, i.e., "joints," can be saved.

[0063] Figure 4A simplified schematic view of a sensor assembly 1 according to a third embodiment of the present invention is shown. The third embodiment substantially corresponds to... Figure 1 In the first embodiment, the difference lies in that each sensor 3's voltage divider 30 has only one resistor 31. Here, the unique resistor 31 of each voltage divider 30 is connected to both the voltage divider input pin 58 and the voltage divider output pin 59. Here, a voltage drop 33 is detected between the voltage divider output pin 59 and the ground pin 57. Figure 4 As shown, this can be achieved, for example, by means of a voltage detection device 55. In the case of the last sensor 4 on the data bus 4, the voltage divider output pin 59 is directly connected to the ground pin 57, i.e., to the ground line 50. Preferably, in the third embodiment, the voltage divider 30 can also be considered such that there is an infinite resistance value between the voltage divider output pin 59 and the ground pin 57.

[0064] Therefore, in Figure 4 In the third embodiment, with Figure 1 Similar to the first embodiment, the voltage drop 33 is sequentially reduced along the data bus 4 through a special series connection of the resistor 31 of the sensor 3. This sequential reduction can be detected in a simple way to determine the order of the sensors 3 on the data bus 4.

Claims

1. Sensor assembly of a vehicle, comprising - a control device (2), - a plurality of identical sensors (3), - a data bus (4) connecting each sensor (3) with the control device (2), - a supply line (5) connecting each sensor (3) with the control device (2) for voltage supply, wherein all sensors are connected with the control device by means of the supply line and the data bus in a parallel circuit, wherein each sensor (3) has a voltage divider (30) with at least one resistor (31, 32), wherein a voltage divider output pin (59) of each sensor (3) is connected with a voltage divider input pin (58) of a sensor (3) arranged behind on the data bus (4), respectively, wherein each sensor (3) is provided for detecting a voltage drop (33) over the resistor (31, 32) or between the voltage divider output pin (59) and a ground line (50), wherein the control device (2) is provided for assigning an individual geographical address to each sensor (3) based on the voltage drop (33) of all sensors (3), wherein each voltage divider (30) has two resistors (31, 32), wherein a center tap (35) of each voltage divider (30) between the two resistors (31, 32) is connected with a voltage divider input pin (58) of a sensor (3) arranged behind on the data bus (4), respectively, wherein the ground line (50) is connected with a ground pin (57) of each sensor (3), wherein a first resistor (31) of the voltage divider (30) is connected with the voltage divider input pin (58), wherein a second resistor (32) of the voltage divider (30) is connected with the ground pin (57), wherein the sensor (3) is provided for detecting a voltage drop over the second resistor (32). The voltage divider input pin (58) of a first sensor (3) on the data bus (4) is connected with the supply line (5). The voltage divider output pin (59) of a last sensor (3) on the data bus (4) is connected with the ground line (50). A first resistance value of the first resistor (31) is smaller than a second resistance value of the second resistor (32). At least one resistor (31, 32) of the voltage divider (30) is configured as high ohmic. The supply line (5) and / or the data bus (4) is configured as a single segment line, wherein each sensor (3) is connected with the supply line (5) and / or the data bus (4) by means of a connection element (45, 51). The supply line (5) and / or the data bus (4) is guided through each sensor (3). The sensor (3) is an ultrasonic sensor. The supply line (5) and / or the data bus (4) is guided through each sensor (3) by means of an input pin (43, 52) and an output pin (44, 53) of each sensor (3). ​ ​ 2. The sensor assembly of claim 1, wherein, ​ 3. The sensor assembly of claim 1 or 2, wherein, ​ 4. The sensor assembly of claim 1 or 2, wherein, ​ 5. The sensor assembly of claim 1 or 2, wherein, ​ 6. The sensor assembly of claim 1 or 2, wherein, ​ 7. The sensor assembly of claim 1 or 2, wherein, ​ 8. The sensor assembly of claim 1 or 2, wherein, ​ 9. The sensor assembly of claim 7, wherein, ​ 10. A method for addressing a sensor (3) of a sensor assembly (1), wherein The sensor assembly (1) has a control device (2), a plurality of identical sensors (3), a data bus (4) connecting each sensor (3) with the control device (2) and a supply line (5) connecting each sensor (3) with the control device (2) for voltage supply, wherein all sensors are connected with the control device by means of the supply line and the data bus in a parallel circuit, wherein each sensor (3) has a voltage divider (30) with at least one resistor (31, 32), wherein a voltage divider output pin (59) of each sensor (3) is connected with a voltage divider input pin (58) of a sensor (3) arranged behind it on the data bus (4), respectively, wherein the method comprises the following steps: - actuating all sensors (3), - determining a voltage drop (33) over the resistor (31, 32) of each sensor (3) or between the voltage divider output pin (59) of each sensor (3) and a ground line (50), - determining the relative position of the sensors (3) to each other, - assigning an individual geographical address to each sensor (3) based on the relative position, wherein the determination of the relative position of the sensors (3) to each other is achieved based on the detected voltage drops (33) of all sensors (3), wherein each voltage divider (30) has two resistors (31, 32), wherein a center tap (35) of each voltage divider (30) between the two resistors (31, 32) is connected with a voltage divider input pin (58) of a sensor (3) arranged behind it on the data bus (4), respectively, wherein the ground line (50) is connected with a ground pin (57) of each sensor (3), wherein a first resistor (31) of the voltage divider (30) is connected with the voltage divider input pin (58), wherein a second resistor (32) of the voltage divider (30) is connected with the ground pin (57), wherein the voltage drop (33) over the second resistor (32) is measured.

11. The method of claim 10, wherein, The order of the sensors (3) on the data bus (4) starting from the control device (2) is determined based on the decreasing size of the magnitude of the voltage drops (33).

12. The method of claim 10 or 11, wherein, Each geographical address is stored in a non-volatile memory of each sensor (3) and / or in a non-volatile memory of the control device (2).

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