EP0890937A2 - Device for transmitting data from a vehicle - Google Patents

Abstract

A transmitter/receiver (1) acts as a terminal for a mobile radiotelephone network, having an interface (3) for data input. Data is transferred as information from a terminal to fixed equipment. The terminal's interface (3) is connected to an interface module (5,23,41,45), having input points for data (6 to 12, 24 to 28) and/or for company business and/or information. The terminal's interface is connected to the interface module through a serial data line (4) and a CAN bus (20). The interface module (41) is connected to a CAN controller (42). The interface module (23) has a microcomputer (14) for entering company business and/or data as well as a CAN controller connected to the microcomputer and the CAN bus. Data can be entered through a CAN controller (21,22) and a CAN bus connected to the terminal's interface.

Description

The invention relates to a device for the transmission of Data from a motor vehicle, based on operating parameters and / or measured values are derived.

With digital cellular networks is also the transmission of Data from vehicles in fixed facilities and vice versa possible. So suggestions have already been made Data from central traffic control computers in motor vehicles to receive and also by corresponding entries on To query the terminal in the motor vehicle in a targeted manner or to call emergency and breakdown services.

The object of the present invention is to Data derived from operating parameters and / or measured values, preferably signals from arranged in the motor vehicle Sensors and switches of a fixed or mobile Facility to transmit without the respective Drivers must do this. This task will solved according to the invention in that a Transceiver as a terminal of a mobile radio network is formed and has an interface that the Data can be fed.

Preferably in the device according to the invention provided that the data as messages from the terminal too fixed facilities are transferred.

Suitable for the device according to the invention Ultimately, operating parameters and / or measured values can all parameters occurring during the operation of a vehicle or Output signals from sensors. As examples called: the speed, the outside temperature and Switch positions, such as the rear fog lamp, the Wipers or lighting. You can also Operating parameters the position and course of a vehicle be, this information from a navigation system, for example from a satellite navigation system, can be won.

By transferring data from sensors and switches of a vehicle to the terminal, it is possible continuously and without distracting the driver, information to a stationary or, if necessary, to a mobile Transfer facility. For example, a Airbag sensor along with location information through a Satellite navigation system (for example GPS = Global Positioning System) can be determined reliably Information about accidents. Weather conditions can for example via fog lights and / or Wiper switch or transmitted via temperature sensors become. From the switched on rear fog lights A traffic control computer can help vehicles appropriate algorithms for the presence of fog close and initiate corresponding messages. Here can already make a rough determination of the fog area the cellular structure of the mobile network and alternatively a more precise location is done by GPS. A redirect the information to road users who are in the stop in the same region, this warns of danger spots and helps prevent accidents.

A first advantageous embodiment of the invention Setup is that the interface of the Terminal is connected to an interface module and that the interface module inputs for the data and / or for the operating parameters and / or measured values. In order to it is possible not to provide specially interfaced Connect sensors and their output signals in to supply the terminal in a suitable form. In addition, that can Interface module still connected to a CAN controller be so that there are signals from sensors and switches can forward that connected via a CAN bus are. It can be provided that the interface of the Terminal with the interface module via a serial Data line or connected via a CAN bus.

If a CAN bus is used, the Device according to the invention in an advantageous manner be trained that the interface module a Microcomputer, which the operating parameters and / or measured values are feedable, and one with the microcomputer and with the CAN controller connected to the CAN bus.

A second advantageous embodiment of the invention Setup is that the operating parameters and / or measured values via at least one CAN controller and one connected to the interface of the terminal CAN bus can be fed. This embodiment is especially for connecting sensors that already match Have interfaces, suitable.

Conventional sensors should also be connected can be in the second embodiment of the invention be provided that a further on the CAN bus Interface module for connection to other sensors connected.

In the device according to the invention, an advantageous one Coding of the data and / or operating parameters and / or Measured values are achieved in that two bytes per Sensor are provided, with a first byte Identification means and a second byte means a value represents. This can be done at the interface and / or on the CAN bus can be provided.

A further development of the device according to the invention exists in that the operating parameters and Measured values are filtered and / or linked. This Further training contributes, among other things, to a large extent only the data intended for transmission to the end device to get redirected. For example Switch positions are queried several times, whereupon one Transmission only takes place if the switch position of interest existed for a long time Has.

This development can be carried out such that a Transmission via the serial interface only after Filtering of several operating parameters and / or measured values or several already linked operating parameters and / or Measured values are carried out. This is the amount of data to be transferred diminishes, especially when equipping many Vehicles with the device according to the invention advantageous is.

It can also be provided that in the interface module it is specified which data is transmitted or that by instructions transmitted over the cellular network which data is transmitted is specified.

Fig. 1

ein erstes Ausführungsbeispiel als Blockschaltbild,

Fig. 2

ein Schnittstellenmodul des ersten Ausführungsbeispiels in detaillierterer Darstellung,

Fig. 3

bis Fig. 6 Blockschaltbilder weiterer Ausführungsbeispiele und

Fig. 7

schematische Darstellungen der auf dem CAN-Bus und/oder über die Schnittstelle der erfindungsgemäßen Einrichtung übertragenen Daten.

Exemplary embodiments of the invention are shown in the drawing using several figures and are explained in more detail in the following description. It shows:

Fig. 1

a first embodiment as a block diagram,

Fig. 2

an interface module of the first embodiment in more detail,

Fig. 3

to Fig. 6 block diagrams of further embodiments and

Fig. 7

schematic representations of the data transmitted on the CAN bus and / or via the interface of the device according to the invention.

The block diagrams consist of function blocks shown, which are also constructive units can correspond. Another constructive assignment is however quite possible. For example, that Interface module can be integrated in the terminal or a Structural satellite navigation receiver with the terminal be summarized.

In the exemplary embodiments according to FIGS. 1, 3, 4, 5 and 6 is a terminal 1 with an antenna 2 intended. The terminal 1 consists essentially of one Mobile station of a cellular network, for example after GSM standard. It has an interface 3, the data can be supplied as messages according to GSM standard can be transmitted. The terminal 1 can be trained that it except for the transmission of data is also suitable for making calls. Furthermore, the Use of a terminal integrated in a car radio possible.

The interface 3 is in the embodiments Figures 1, 5 and 6 with a serial data line 4 an interface module 5 or 41 or 45 connected, the in the illustrated embodiments, inputs 6 to 12 has. The number of inputs shown is just an example. Depending on your needs, more or fewer inputs are provided, the operating parameters and measured values - hereinafter also called sensor signals - are feedable. The serial data line 4 can be used as the Motor vehicle construction imported CAN bus be formed what in the embodiments of Figures 3 and 4 of Case is.

2 is an example of an interface module 23 a circuit shown, which consists essentially of a Microcomputer 14 and a CAN controller 15 exists. Of the CAN controller 15 is connected to CAN bus 20 while 14 the sensor signals can be supplied to the microcomputer. So will an input 24 an analog signal, for example one External thermometer, supplied via a signal converter 16 and an analog / digital converter 17 an input of Microcomputer 14 is fed. The entrance will be 25 for example, a switching signal from a wiper fed, which only says whether the wiper is on or off. Here is only one Signal converter 18 required, as well as the one Input 26 forwarded signal of a rear fog lamp Signal converter 19. Further inputs 27, 28, signal converter and Analog / digital converters are only indicated in FIG. 2. The interface module 5 (FIG. 1) corresponds to essential the interface module 23 and therefore needs not to be explained again.

The microcomputer 14 with integrated data and Program memory controls the conversion of the sensor signals into CAN data frame and coordinates other internal processes. Each after implementation of the invention in detail can Microcomputer 14 still further processing steps for the supplied sensor signals can be provided. So can for example by an individual, if necessary Programming can be preset what data to be transferred or released for transfer become. Furthermore, filtering the sensor signals be carried out, in particular to increase the Meaningfulness or the security of the transmitted data. For example, from the position of the wiper switch rain may be inadvertent briefly switching on the wiper are ignored, that before transferring the corresponding data to several separate times of the wiper switches is queried. By linking several Operating parameters and measured values can be transferred Amount of data can be reduced, which can be important if a very large number of motor vehicles with devices according to the invention is provided.

Finally, a selection of the data to be transferred is also available depending on those added via the cellular network Instructions possible. This allows vehicles, for example be asked to send data that is in a given region in which this data for a Evaluation are interesting. So it doesn't make sense that Thousands of vehicles within an urban area Send out messages that their speed is a falls below predetermined threshold, while such Reports from vehicles traveling on a motorway Indication of a traffic jam.

The signal converters set those emitted by the sensors Voltages into values suitable for the microcomputer 14. In the case of discretely occurring sensor voltages, the means in the case of binary signals, the Output voltage of the signal converter immediately that Microcomputer 14 are supplied. With continuous Sensor voltages such as that Outside temperature sensor, an analog / digital conversion follows discrete values. The CAN controller 15 is integrated Circuit available on the market.

3 is the Interface 3 of the terminal 1 via a CAN bus 20 with two CAN controllers 21, 22 and an interface module 23 connected.

3 is for the case that not all sensors whose signals are transmitted should have CAN bus interfaces, provided that Signals from sensors without CAN bus interfaces Inputs 24 to 28 of the interface module 23 fed become. 3 schematically shown sensors 30, 31, 32, 33 are two each with one of the CAN controllers 21, 22 connected buses connected. There is a bus 34 the body electronics and a bus 35 the drive train assigned. The CAN controllers 21, 22 regulate the access of the two buses 34, 35 to the CAN bus 20, with signals from those Sensors that are important for safety while driving are enjoying priority.

4 differs from 3 only in that instead of two CAN controllers 21, 22 a CAN gateway 36 are provided to which the two buses 34, 35 are connected.

In the embodiment shown in Fig. 5 is a Interface module 41 in addition to inputs 6 to 10 provided with an input for a CAN controller 42 which connected to a number of sensors via a bus 43 is. This embodiment is particularly then advantageous if both fed directly from sensors Measured values and operating parameters as well as via a CAN bus 43 supplied measured values and operating parameters processed become. As described above, this can be advantageous Way in the interface module 41.

Compared to the exemplary embodiment according to FIG. 5, this is 6 by a Satellite navigation receiver 48 with an antenna 49 expanded. The satellite navigation receiver 48 has one Interface 47 on a data line 46 with the Interface module 45 is connected. Each from Satellite navigation receiver 48 reported data (Position, direction and / or speed) can, depending on the embodiment of the invention in detail either directly or after processing in the Interface module 45 to the terminal 1 and thus via the Cellular network are transmitted. For example the transfer of the position from other operating parameters be dependent, especially for sending an emergency call with the trigger signal of an airbag.

Lines 51 to 60 of the following table already list common or future sensors in the motor vehicle (column A), the type of their output signal (column B), the internal identification (column C) and the digital representation of the output signal (column D). A B C. D sensor Data content internal identif. Data content (digital) a out 51 Crash signaling device Trigger 00000001 00001 00000 52 ABS signal on off 00000010 00001 00000 53 ABS wheel sensor Pulses / s 00000011 xxxxx xxxxx 54 counter on off 00000100 00001 00000 55 counter on off 00000101 00001 00000 56 counter on off 00000110 00001 00000 57 System output on off 00000111 00001 00000 58 Temperature sensor temperature 00001000 xxxxx xxxxx 59 Laser, radar sensor distance 00001001 xxxxx xxxxx 60 Optical sensor distance 00001010 xxxxx xxxxx

The output signal of the crash signal generator (line 51) one Air bags is just a trigger, that is a short one Pulse. This is identified and indicated as indicated transferred according to columns C and D of the table. The ABS system (line 52) generates a signal when activated is. The signal from the wheel sensor (line 53) is converted into pulses measured and transmitted per second, for which the data content in column D of the table is marked with x.

The switches shown in lines 54 to 56 are that Hazard lights, the rear fog lamp and the wiper assigned and give an on / off signal, as well as the System output of a traction control in line 57. Line 58 is the temperature sensor of the outside thermometer listed, the output signal of which is an analog signal, just like the signals from a distance sensor and one Sensors for visibility (lines 59 and 60), which each represent a distance.

• acht Bit für die interne Identifizierung des jeweiligen Sensors,
• drei Bit frei,
• fünf Bit Dateninhalt.

In the data frame of the messages on the CAN bus, eight bytes are available for variable data. The first two bytes of this can be used for coding the sensors and the outputs (sensor signals) as follows:

• eight bits for the internal identification of the respective sensor,
• three bits free,
• five bit data content.

The first byte is the sensor or switch identified. The last five bits in the second byte contain the on / off information for switches (cf. above table), for sensors, the continuous signals different values are possible.

7a shows the structure of an advantageous coding of the Data with two bytes 61, 62, whereby byte 61 is one Identification, while byte 62 represents the value of the contains the respective signal.

FIGS. 7b and 7c show the data of two as examples Sensors, the first byte 63, 65 being the internal one Identification contains one, in the example according to FIG. 7b Fog light and in the example of Fig. 7c Outdoor thermometer according to the table above. The first three bits of the second byte 64, 66 are in Figures 7b and 7c each marked with an x because they are in the Embodiment not used or free for others Purposes are. The last five bits represent the respective one Value of the signal. For example, 00001 in FIG. 7b that the rear fog lamp is switched on while in Fig. 7c 10010 means that an outside temperature of 14 ° C is measured. With this proposal, the measured Temperature in steps of 2 ° C over a range coded from -20 ° C to +42 ° C.

Claims (15)

Device for transferring data from one Motor vehicle based on operating parameters and / or measured values are derived, characterized in that a Transmitting / receiving device (1) as a terminal one Mobile network is formed and an interface (3) to which the data can be fed. Device according to claim 1, characterized in that the data as messages from the terminal (1) too fixed facilities are transferred. Device according to one of claims 1 or 2, characterized characterized in that the interface (3) of the terminal (1) is connected to an interface module (5, 23, 41, 45) and that the interface module (5, 23, 41, 45) inputs (6 to 12, 24 to 28) for the data and / or for the Has operating parameters and / or measured values. Device according to claim 3, characterized in that the interface (3) of the terminal (1) with the Interface module (5, 41, 45) via a serial Data line (4) is connected. Device according to claim 4, characterized in that the interface module (41) also with a CAN controller (42) is connected. Device according to claim 3, characterized in that the interface (3) of the terminal (1) with the Interface module (23) connected via a CAN bus (20) is. Device according to claim 6, characterized in that the interface module (23) a microcomputer (14), to which the operating parameters and / or data can be supplied, and one with the microcomputer (14) and with the CAN bus (20) contains connected CAN controller (15). Device according to one of claims 1 or 2, characterized characterized in that the data on at least one CAN controller (21, 22) and one with the interface (3) CAN bus (20) connected to the terminal (1) can be fed. Device according to claim 8, characterized in that an interface module (23) is also connected to the CAN bus (20) for supplying operating parameters and / or measured values connected. Device according to one of claims 5 to 9, characterized characterized in that for coding the data and / or the Operating parameters and / or measured values two bytes each Sensor are provided, with a first byte Identification means and a second byte means a value represents. Device according to one of the preceding claims, characterized in that to derive the data Filtered and / or linked operating parameters and measured values become. Device according to claim 11, characterized in that a transmission via the interface (3) only after Filtering of several operating parameters and / or measured values or several already linked operating parameters and / or Measured values are carried out. Device according to one of claims 11 or 12, characterized in that in the interface module (5, 23, 41, 45) it is specified which data are transmitted. Device according to one of claims 11 and 12, characterized characterized in that by transmitted over the cellular network Instructions are given which data is transmitted. Device according to one of the preceding claims, characterized in that further a Satellite navigation receiver (48) is connected, whose output signals can be supplied as operating parameters.

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