WO2009124518A1 - Interface and control circuit for a sensor cluster for providing sensor data for vehicle application - Google Patents
Interface and control circuit for a sensor cluster for providing sensor data for vehicle application Download PDFInfo
- Publication number
- WO2009124518A1 WO2009124518A1 PCT/DE2009/000208 DE2009000208W WO2009124518A1 WO 2009124518 A1 WO2009124518 A1 WO 2009124518A1 DE 2009000208 W DE2009000208 W DE 2009000208W WO 2009124518 A1 WO2009124518 A1 WO 2009124518A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- sensors
- vehicle
- data
- sensor cluster
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R2021/0104—Communication circuits for data transmission
- B60R2021/01047—Architecture
- B60R2021/01054—Bus
- B60R2021/01068—Bus between different sensors and airbag control unit
Definitions
- Interface and control circuit for a sensor cluster for providing sensor data for vehicle applications
- the invention relates to an interface and control circuit for a sensor cluster for providing sensor data for vehicle applications according to claim 1.
- driver assistance systems and occupant protection safety or protection systems are increasingly being used in vehicles in order to ensure the most comfortable and safe driving possible and the most effective possible protection in the event of accidents.
- An improvement in the protective effect of occupants is achieved in particular by the known occupant protection systems such as airbags and Gurtstrammer adopted be supplemented by so-called rollover systems and rollover protection functions that should protect inmates especially in accidents with rollover events.
- ESP Electronic Stability Program
- driver-assisting assistance systems continue to be used to ensure the most balanced ride possible.
- All of the aforementioned systems are based on the processing of signals from a variety of sensors used in the vehicle. Individual sensors can also be used for various applications in the vehicle, for example a yaw rate sensor for a rollover protection function as well as for an ESP system.
- the object of the present invention is to propose an interface and control circuit for a sensor cluster, which can provide sensor data for various vehicle applications. This object is achieved by an interface and control circuit having the features of claim 1. Further embodiments of the invention will become apparent from the dependent claims.
- An essential aspect of the invention is to provide a sensor cluster having a plurality of sensors, one or more of the sensors having adjustable dynamic ranges to be applicable to different vehicle applications, and further providing a possibility of providing the sensor output Characteristics, in particular dynamic ranges of the individual sensors or sensor channels of the sensor cluster in the operation of the sensor cluster, in particular to be able to set in real-time operation, above all (to be able to freely configure.
- sensor output Characteristics in particular dynamic ranges of the individual sensors or sensor channels of the sensor cluster in the operation of the sensor cluster, in particular to be able to set in real-time operation, above all (to be able to freely configure.
- current operating parameters can be taken into account for the configuration.
- the present invention now relates, according to one embodiment, to a sensor cluster interface and control circuit for providing sensor data for vehicle applications having a plurality of sensors of which one or more of the sensors have adjustable dynamic ranges, wherein the interface and Control circuit for receiving and processing control data from a vehicle application for adjusting one or more dynamic ranges of the sensors of the sensor cluster is formed during the operation of the sensor cluster.
- the interface and control circuit can be designed, for example, as an independent module or even as an integrated circuit, which can be integrated into a sensor cluster or a control unit for various vehicle applications. Under vehicle application in particular the safety systems mentioned above are understood, which are increasingly used in modern motor vehicles.
- Digital communication has the advantage of a lower susceptibility to interference in the vehicle, since transmitted digital data can be better protected against analog transmission errors and faults by means of suitable protocols.
- the circuit for sequentially combining received digital sensor data may be formed in a transmission frame protocol and for communication with vehicle applications according to the transmission frame protocol.
- the use of a transmission frame protocol has the advantage that the sensor data can be transmitted serially, as a result of which the wiring complexity in the vehicle can be significantly reduced in comparison to a parallel data transmission.
- the circuit may further be configured in accordance with an embodiment of the invention to assign a specific information block of a transmission frame of the transmission frame protocol to each of the sensors of the sensor cluster.
- the circuit may be designed to transmit sensor data and dynamic range data of the assigned sensor in each information block.
- a receiver of frames can thereby determine with which dynamic range the sensor supplying the sensor data present in the information block operates, or on which dynamic range it is set is. This allows the receiver to optimize the processing of the received sensor data, in particular to adapt the processing of the sensor data to the set dynamic range of the sensor.
- the circuit may be configured to send to sensors of the sensor cluster configuration parameters with data for adjusting the dynamic ranges of the sensors.
- These configuration parameters can be transmitted, for example, in digital form to the sensors, for example as type commands for setting the dynamic ranges.
- the configuration parameters can also be transmitted as configuration parameter sets, in which different setting criteria for a sensor are specified, for example a criterion for setting the dynamic range of the sensor, another criterion for the validity of the dynamic range to be set, whereby the sensor can only achieve the desired dynamic range for one sensor Set time duration according to the transmitted validity, and after the time period can switch back to the original dynamic range automatically.
- it can be provided that always the last transmitted configuration parameter set is valid until a new configuration parameter set is transmitted.
- the circuit may further be configured in accordance with an embodiment of the invention to transmit to sensors of the sensor cluster cyclically different configuration parameters with data for setting different dynamic ranges of the sensor. For example, it may be necessary for a specific sensor, which is required for different vehicle applications, to cyclically switch between different dynamic ranges that are each adapted to a specific vehicle application. It is conceivable, for example, that a yaw rate sensor is used by a vehicle dynamics control system and a rollover protection system and that different dynamic ranges (sensor speeds) are determined for each of these two vehicle applications. Output characteristics) of the sensor are required.
- the circuit can also be designed to receive identifiers for identifying vehicle applications as control data and to set the dynamic ranges of the sensors of the sensor cluster required for the identified vehicle applications for the identified vehicle applications.
- the dynamic ranges of sensors required for different vehicle applications may be stored in the circuit together with corresponding identification data for the vehicle application.
- the circuit receives an identifier of a specific vehicle application as the control data, it can load the dynamic ranges of all sensors required for the vehicle application from an internal memory and set the sensors accordingly.
- the invention further relates, according to one embodiment, to a sensor cluster for providing sensor data for vehicle applications having a plurality of sensors, of which one or more of the sensors have adjustable dynamic ranges, and an interface and control circuit according to the invention and as described above.
- a sensor cluster can be designed as a vehicle component that is offered for installation in motor vehicles.
- the invention relates to the use of an interface and control circuit according to the invention and as described above in a vehicle, wherein the circuit is connected between a sensor cluster in the vehicle and various vehicle applications.
- Fig. 1 is a schematic diagram of a sensor cluster with various sensors and an interface and control circuit according to an embodiment of the invention.
- Transmission frame protocol according to the invention, as may be implemented by the interface and control circuit shown in Fig. 1.
- the sensor output characteristics of one or more sensor channels of a sensor cluster are also freely configurable in real-time operation (continuous), wherein to obtain an application-dependent ideal sensor output. Characteristics for the configuration current operating parameters can be taken into account.
- the sensor signals or sensor data of the individual sensor channels can also be adapted during active operation (cyclic measured value acquisition) by means of programming to the current realities or application requirements. Under the circumstances of the "present in reality conditions" are the parameters such as airspeed, relative speed difference to a preceding vehicle or to an oncoming vehicle, Hindemis Meeting, Hindemismasse, etc. to understand.
- FIG. 1 shows an exemplary embodiment of a sensor cluster 10 for use in a motor vehicle for vehicle applications 12, 14 and 16, which process both acceleration sensor data and gyroscope sensor data.
- the sensor cluster 10 in principle allows the use of a sensor for a plurality of vehicle applications with different requirements for the dynamic range of the sensor, as will be explained in more detail below.
- the sensor cluster 10 has individual acceleration sensors 18, 20, 22 ("ax”, “ay”, “az”) for detecting the acceleration of the vehicle in its longitudinal (x), transverse (y) and vertical axes Further, the sensor cluster 10 includes yaw rate or yaw rate sensors 24, 26, 28 (" ⁇ x”, “ ⁇ / y”, “ ⁇ z") adapted to detect rotational movement of the vehicle about its longitudinal axis. , Transverse and vertical axis are arranged.
- the sensors 18, 20, 22, 24, 26 and 28 provide digital output signals, ie sensor data in digital form. For this purpose, they each have corresponding digital interface logic, which further as possible trouble-free and error-free transmission of the sensor data by using checksums such as Cyclic Redundancy Check (CRC) or the like in the Digital technology can ensure conventional error detection and correction techniques.
- CRC Cyclic Redundancy Check
- the sensor data are sequentially combined by logic ( ⁇ C) 30, i. arranged in a protocol with transmission frames one behind the other.
- ⁇ C logic
- the sensor data of each sensor are assigned to specific information blocks in the context of the protocol, as shown in FIG. 2 and will be explained in more detail below.
- the logic 30 transmits the sensor data thus arranged sequentially in the transmission frame protocol to an interface 32, which may be in the form of an SPI (Serial Parallel Interface) interface, for example, and handles the actual serial data transmission to the vehicle applications 12, 14 and 16.
- the interface 32 can also receive and process control signals from the vehicle applications 12, 14 and 16, with which the dynamic ranges of the individual sensors of the respective situation are adapted in real time under the control of the vehicle application sending a control command in accordance with the situation.
- the adaptation takes place here by dynamic range adjustment circuits 34, which controlled by the interface 32 controls the dynamic ranges of the individual sensors as required by a vehicle application and / or requested.
- a configuration parameter set can be transmitted to the sensor cluster, which is processed by the interface 32 in such a way that the sensor cluster correspondingly provides the individual sensor signal information in the following or soon afterwards provided "data record"
- the configuration parameter set management in the sensor cluster can be implemented in such a way that, unless a new configuration parameter set is communicated, the configuration parameter set last transmitted automatically remains valid, and the sensor cluster automatically provides the "data records" cyclically at the interface according to this configuration parameter set.
- the information from yaw rate sensors (“ ⁇ x", “ ⁇ y”, “ ⁇ z”) may also be provided alternately in sensor output characteristic dynamics (40 degrees / second, 250 degrees / second)
- ⁇ x ⁇ x
- ⁇ y ⁇ z
- sensor output characteristic dynamics 40 degrees / second, 250 degrees / second
- a resulting halving of the data transmission rate for the downstream vehicle applications is generally irrelevant since the rotation rate information (sensor data from gyroscope sensors), as compared to acceleration information (sensor data from acceleration sensors), is generally at a lower transmission rate required are.
- the sensor cluster concept allows real-time sensor-to-output characteristic dynamics adjustment, typically with low vehicle speed, low dynamics, and high sensitivity (mV / g) is to choose because in a low speed crash with a rigid barrier (eg tree) lower acceleration amplitudes are to be expected, whereas at high vehicle speed high dynamics and low sensitivity (mV / g) has to be chosen as in an accident high acceleration amplitudes are to be expected at high speed with a rigid barrier (eg tree).
- the relative speed to the preceding obstacle or to the oncoming obstacle can be considered as influencing parameters analogously thereto, instead of the airspeed.
- the mass ratios of the obstacle can be taken into account as influencing parameters, since with an obstacle with a large mass, large acceleration amplitudes are to be expected, whereas with an obstacle with low mass, low acceleration amplitudes are to be expected.
- dynamic range is understood, for example, in the simplest case, the measuring range of an A / D converter input (0 volts - 5 volts) or the utilization of the depth of a digital protocol of each application.
- dynamic resolution range or dynamic range of representation is to be understood as meaning the properties or the specific data of a sensor, which must be correspondingly mapped to the respective output.
- a rotation rate sensor with an illustrative measurement range of 250 degrees / second, in which the output at a corresponding 250 degrees rotation (per second) of the sensor corresponding to its maximum output dynamic range to be displayed for displaying ( Figure) the sensor measurement signal controls or . uses.
- this may be an analogue size or a digital transmission protocol of an interface, with a corresponding depth of the interface protocol.
- Fig. 2 shows the implementation of a transmission frame protocol 36 or transmission frame 38, 40, wherein for reasons of simplicity, only the "signal channel information blocks" 42 are shown, the individual sensors are assigned, as shown by the registered in the blocks sensor identifications For example, start & sync bits may be prefixed, or stop, parity, CRC, or other check bits required to secure the protocol may be appended, again not shown in FIGURE 2 for simplicity 38 for the time t and below the transmission frame 40 for the subsequent time t + 1 shown, wherein between the two frames, a switching of the dynamic ranges of all sensors 18, 20, 22, 24, 26, 28 of the sensor cluster 10 is carried out.
- Each transmission frame 38 comprises a plurality of information blocks.
- Some information blocks 42 are assigned a particular sensor 18, 20, 22, 24, 26, 28 of the sensor cluster 10, other information blocks are unused ("-"). Sensor data and information about the dynamic range of the sensor are transmitted in an information block 42 assigned to a sensor, indicated for example by "ax-100", ie sensor data of the sensor 18 with a set dynamic range 100.
- the individual sensor signal information in the two transmission frames 38 and 40 can be provided alternately in their dynamic ranges at the interface 32.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112009001426T DE112009001426A5 (en) | 2008-04-09 | 2009-02-14 | Interface and control circuit for a sensor cluster for providing sensor data for vehicle applications |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008017903.5 | 2008-04-09 | ||
DE200810017903 DE102008017903A1 (en) | 2008-04-09 | 2008-04-09 | Interface and control circuit for a sensor cluster for providing sensor data for vehicle applications |
Publications (1)
Publication Number | Publication Date |
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WO2009124518A1 true WO2009124518A1 (en) | 2009-10-15 |
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ID=40786626
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2009/000208 WO2009124518A1 (en) | 2008-04-09 | 2009-02-14 | Interface and control circuit for a sensor cluster for providing sensor data for vehicle application |
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DE (2) | DE102008017903A1 (en) |
WO (1) | WO2009124518A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102016121565A1 (en) * | 2016-11-10 | 2018-05-17 | Valeo Schalter Und Sensoren Gmbh | Sensor device for a vehicle |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005013450A1 (en) * | 2005-03-23 | 2006-09-28 | Robert Bosch Gmbh | security system |
DE102005014782A1 (en) * | 2005-03-31 | 2006-10-05 | Siemens Ag | Method and device for transmitting data on a data line between a control device and a decentralized data processing device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10049905A1 (en) * | 2000-10-10 | 2001-10-25 | Bosch Gmbh Robert | Controller for restraining system, has arrangement for pre-processing sensor values and arrangement for transmitting pre-processed sensor values to other vehicle systems over bus |
DE10107215A1 (en) * | 2001-02-16 | 2002-09-12 | Bosch Gmbh Robert | Method for controlling and evaluating a sensor device used jointly by several applications |
DE10237160A1 (en) * | 2002-08-14 | 2004-02-26 | Robert Bosch Gmbh | Device for sensing a motor vehicle impact has at least two pressure sensors connected to a processor which transmits a value to further motor vehicle systems |
DE102004064066B4 (en) * | 2004-06-09 | 2011-06-09 | Fendt, Günter | Method for evaluating a rotation rate signal of a multifunction rotation rate sensor |
WO2008003346A1 (en) * | 2006-07-07 | 2008-01-10 | Continental Automotive Gmbh | Method and system for processing the sensor signals of a motor vehicle |
-
2008
- 2008-04-09 DE DE200810017903 patent/DE102008017903A1/en not_active Withdrawn
-
2009
- 2009-02-14 DE DE112009001426T patent/DE112009001426A5/en not_active Withdrawn
- 2009-02-14 WO PCT/DE2009/000208 patent/WO2009124518A1/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005013450A1 (en) * | 2005-03-23 | 2006-09-28 | Robert Bosch Gmbh | security system |
DE102005014782A1 (en) * | 2005-03-31 | 2006-10-05 | Siemens Ag | Method and device for transmitting data on a data line between a control device and a decentralized data processing device |
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Publication number | Publication date |
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DE112009001426A5 (en) | 2011-03-10 |
DE102008017903A1 (en) | 2009-10-15 |
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