SE1550013A1 - System for diagnosing the condition of an assembly of sensorunits for sensing an activated and deactivated state of a v ehicle function for one or more vehicle components - Google Patents

System for diagnosing the condition of an assembly of sensorunits for sensing an activated and deactivated state of a v ehicle function for one or more vehicle components Download PDF

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Publication number
SE1550013A1
SE1550013A1 SE1550013A SE1550013A SE1550013A1 SE 1550013 A1 SE1550013 A1 SE 1550013A1 SE 1550013 A SE1550013 A SE 1550013A SE 1550013 A SE1550013 A SE 1550013A SE 1550013 A1 SE1550013 A1 SE 1550013A1
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SE
Sweden
Prior art keywords
sensor units
sensor
vehicle
diagnosing
activated
Prior art date
Application number
SE1550013A
Other languages
Swedish (sv)
Other versions
SE539748C2 (en
Inventor
Yabandeh Mikael
Ibrahim Mohammed
Lindgren Kenneth
Original Assignee
Scania Cv Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Scania Cv Ab filed Critical Scania Cv Ab
Priority to SE1550013A priority Critical patent/SE539748C2/en
Priority to DE102015016615.8A priority patent/DE102015016615A1/en
Publication of SE1550013A1 publication Critical patent/SE1550013A1/en
Publication of SE539748C2 publication Critical patent/SE539748C2/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3275—Fault detection or status indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
    • B60K28/10—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle 
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3272—Apparatus, systems or circuits therefor
    • G01R31/3274—Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
    • H04Q2209/86—Performing a diagnostic of the sensing device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2209/00—Arrangements in telecontrol or telemetry systems
    • H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
    • H04Q2209/88—Providing power supply at the sub-station

Abstract

ABSTRACT The present invention relates to a system (I) for diagnosing the condition of an assembly of sensor units (Si, S2, S3) for sensing an activated and deactivated state of a vehicle function for one or more vehicle components. The sensor units (51, S2, S3) are connected to an electronic control unit (100). A common voltage source (100, 200) is provided for supplying said sensor units. The sensor units (Si, S2, S3) are arranged in a common circuit (C) connected to said electronic control unit (100) and arranged in series in said circuit (C). Each sensor unit (Si, S2, S3) is coupled in parallel with a resistor element (R1, R2, R3). The circuit (C) is configured to be fed by means of said common voltage source (100, 200). The resulting voltage over said circuit (C) is determined as a basis for said diagnosing.

Description

ABSTRACT The present invention relates to a system (I) for diagnosing the condition of an assembly of sensor units (Si, S2, S3) for sensing an activated and deactivated state of a vehicle function for one or more vehicle components.
The sensor units (51, S2, S3) are connected to an electronic control unit (100). A common voltage source (100, 200) is provided for supplying said sensor units. The sensor units (Si, S2, S3) are arranged in a common circuit (C) connected to said electronic control unit (100) and arranged in series in said circuit (C). Each sensor unit (Si, S2, S3) is coupled in parallel with a resistor element (R1, R2, R3). The circuit (C) is configured to be fed by means of said common voltage source (100, 200). The resulting voltage over said circuit (C) is determined as a basis for said diagnosing.
The present invention also relates to a vehicle.
(Fig. 2) 1 SYSTEM FOR DIAGNOSING THE CONDITION OF AN ASSEMBLY OF SENSOR UNITS FOR SENSING AN ACTIVATED AND DEACTIVATED STATE OF A VEHICLE FUNCTION FOR ONE OR MORE VEHICLE COMPONENTS TECHNICAL FIELD The invention relates to a system for diagnosing the condition of an assembly of sensor units for sensing an activated and deactivated state of a vehicle function for one or more vehicle components according to the preamble of claim 1. The invention also relates to a vehicle.
BACKGROUND ART In vehicles it is common that assemblies of sensor units are used for sensing activated and deactivated state of vehicle component function. The status of the engine hood of the vehicle, i.e. whether the engine hood is opened or closed is critical to determine correctly.
US2003047155 discloses solutions including switch elements for detecting whether an engine hood is closed and a functionality for indicating the need to replace a broken switch element.
An alternative way of determining an activated and deactivated state of vehicle component function such as the status of the engine hood is using an assembly of sensor units coupled in parallel. Hereby redundancy is obtained so that the status of the engine hood may be safely determined even if one sensor unit would be defect.
Such a solution, however, requires many inlets on a control unit affecting costs, weight and availability of such inlets.
OBJECTS OF THE INVENTION An object of the present invention is to provide a system for diagnosing the condition of an assembly of sensor units for sensing an activated and 5 deactivated state of a vehicle function for one or more vehicle components which facilitates safe diagnosing in a cost efficient way.
Another object of the present invention is to provide a system for diagnosing the condition of an assembly of sensor units for sensing an activated and deactivated state of a vehicle function for one or more vehicle components which is flexible.
SUMMARY OF THE INVENTION These and other objects, apparent from the following description, are achieved by a system and a vehicle as set out in the appended independent 15 claims. Preferred embodiments of the method and the system are defined in appended dependent claims.
Specifically an object of the invention is achieved by a system for diagnosing the condition of an assembly of sensor units for sensing an activated and deactivated state of a vehicle function for one or more vehicle components.
The sensor units are connected to an electronic control unit. A common voltage source is provided for supplying said sensor units. Said sensor units are arranged in a common circuit connected to said electronic control unit and arranged in series in said circuit. Each sensor unit is coupled in parallel with a resistor element. Said circuit is arranged to be fed by means of said common voltage source, wherein the resulting voltage over said circuit is arranged to be determined as a basis for said diagnosing. Hereby efficient diagnosing of the sensor units is facilitated in a cost efficient way in that fewer outputs/inputs, i.e. only one input and one output, are required. The 2 3 computing power required is hereby reduced. Such a system further takes up less space and hence requires less cables/conduits. The system further facilitates adding sensor units by coupling additional sensor units in series with the other sensor units as no extra output/input is required, the system thus being more flexible. Such a system may thus have two or more sensor units coupled in series to obtain redundancy, a non-functioning sensor unit still being diagnosable.
According to an embodiment of the system the resistance of the resistor element for the respective sensor unit differ between the different sensor units. Hereby it is possible to determine which sensor unit is deactivated and/or non-functioning.
According to an embodiment of the system the voltage source is provided by means of said electronic control unit. By using the electronic control unit as the voltage source for supplying the voltage to the sensor units According to an embodiment the system comprises at least one sensor unit.
According to an embodiment the system comprises at least two sensor units. Hereby redundancy for sensing the state of a vehicle component function is facilitated. Hereby sensing of functions for different vehicle components is facilitated.
BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the present invention reference is made to the following detailed description when read in conjunction with the accompanying drawings, wherein like reference characters refer to like parts throughout the several views, and in which: Fig. 1 schematically illustrates a side view of a vehicle according to the present invention; and 4 Fig. 2 schematically illustrates a system for diagnosing the condition of an assembly of sensor units for sensing an activated and deactivated state of a vehicle function for one or more vehicle components.
DETAILED DESCRIPTION Hereinafter the term "vehicle component function" refers to any function of a vehicle component having an activated state and a deactivated state. A vehicle component function may for example be the function for the engine hood and the status of the function of the engine hood is opened or closed. A vehicle component function may be the gate for a bus driver entering the driver seat and the status of the function of the gate is opened or closed. A vehicle component function may be whether a driver is in a driver position, e.g. sitting in the driver seat, has activated a gear, has deactivated a brake function, is gripping the steering wheel, all such states being detectable by means of different sensor units. The activated and deactivated state may be any activated and deactivated state such as on and off, closed and opened, level above or below, e.g. temperature above or below a certain level, status of stop/start function e.g. on the engine, on position/ off position, brake on/off, doors opened/closed, position of the hand brake etc.
Fig. 1 schematically illustrates a side view of a vehicle according to the present invention. The exemplified vehicle 1 is a heavy vehicle in the shape of a truck. The vehicle according to the present invention could be any suitable vehicle such a bus, a car, a train or the like. The vehicle 1 comprises a system for diagnosing the condition of an assembly of sensor units for sensing an activated and deactivated state of a vehicle function for one or more vehicle components. The system is configured for sensing an activated and deactivated state of a vehicle component function. Such a system may also be arranged to sense activation of a vehicle function for one or more vehicle components so as to know whether a vehicle component function is activated. Systems having such sensor units require reliable information and hence require efficient diagnosing of the condition of the assembly of sensor units. The vehicle 1 may comprise several such systems.
Fig. 2 schematically illustrates a system I for diagnosing the condition of an assembly of sensor units Si, S2, S3 for sensing an activated and deactivated state of a vehicle function for one or more vehicle components. The number of sensor units could be more than three and less than three.
The system I system comprises an electronic control unit 100.
The assembly of sensor units S1, S2, S3 are in this example three sensor units Si, S2, S3, a first sensor unit S1, a second senor unit S2 and a third sensor unit S3. The sensor units Si, S2, S3 are configured to sense an activated and deactivated state of a vehicle component function. Such a vehicle component function could be any suitable vehicle component function having an activated and deactivated state. For example the activated and deactivated state of the engine hood could be sensed by means of such sensor units S1, S2, S3.
The system I according to one embodiment of the present invention comprises at least two sensor units.
The sensor units Si, S2, S3 may be configured to sense the status of the same vehicle component in order to obtain redundancy. For some components in a vehicle it is critical to know the status, i.e. whether it is activated or deactivated. Here two or more sensor units are used to secure that the sensed status is correct.
The sensor units S1, S2, S3 may be configured to sense the status of different vehicle components in order to know that a certain function is activated or deactivated. Here at least one sensor unit is used for sensing the status of the respective component. For example the sensor unit Si is arranged to sense the position of the hand brake actuator, i.e. if it is on or off, 6 the sensor unit S2 and S3 are arranged to sense the status of the sunroof, i.e. if it is opened or closed.
The system I comprises a common circuit C. The electronic control unit 100 is connected to the circuit C via an output 10a and an input 10b.
The system I according to this embodiment comprises an assembly of three sensor unit Si, S2, S3.
The sensor units Si, S2, S3 are connected to the electronic control unit 100. The sensor units Si, S2, S3 are arranged in the common circuit C, the sensor units S1, S2, S3 being arranged in series in said circuit. Thus, the first sensor unit Si is coupled in series with the second sensor unit S2 which in turn is coupled in series with the third sensor unit S3 within the common circuit. Additional sensor units could be added in series to the assembly of sensor units Si, S2, S3 within the common circuit. Fewer sensor units could also be included, e.g. two sensor units in series, in the common circuit C.
A common voltage source is provided for supplying said sensors. The voltage source is provided by means of said electronic control unit 100. The electronic control unit is connected to a voltage source 200. The electronic control unit 100 is configured to receive a voltage supplied by means of the voltage source 200. The electronic control unit 100 is configured to process said supplied voltage so as to supply said sensors with a fixed voltage.
Hence, if the voltage in the voltage source 200 is varying to some extent, the electronic control unit 100 comprises means for processing the voltage supplied from the voltage source 200 to the electronic control unit such that a fixed voltage is supplied from the output 10a in said common circuit. A resulting voltage over the common circuit may then be determined by means of the electronic control unit 100. The electronic control unit is thus arranged to measure the voltage over the circuit C. 7 For example, the voltage provided by the voltage source is configured to be 24 V but could vary between e.g. 22 V and 28 V. If the voltage supplied from the voltage source 200 differs from 24 V the electronic control unit will adjust the voltage supplied to the sensor units S1, S2, S3 to 24 V.
The common circuit C is thus configured to be fed by means of the electronic control unit 100 functioning as the common voltage source.
Each sensor unit S1, S2, S3 is coupled in parallel with a resistor element R1, R2, R3. The first sensor unit S1 is coupled in parallel with a first resistor element R1 . The second sensor unit S2 is coupled in parallel with a second resistor element R2. The third sensor unit S3 is coupled in parallel with a third resistor element R3.
The resistance of the resistor element R1, R2, R3 for the respective sensor unit Si, S2, S3 differ between the different sensor units. The resistance of the resistor element R1, R2, R3 for the respective sensor unit S1, S2, S3 differ between the different sensor units so as to determine which sensor unit is deactivated and/or non-functioning.
The resistance of the first resistor element R1 thus differs from the resistance of the second resistor element R2 and differs from the resistance of the third resistor element R3. Further, the second resistor element R2 differs from the third resistor element.
By having the resistance of the resistor element R1, R2, R3 for the respective sensor unit Si, S2, S3 differing between the different sensor units each sensor unit Si, S2, S3 is thus individually resistor-coded such that it is possible to determine which sensor unit is deactivated and/or non- functioning.
If the respective sensor element S1, S2, S3 are activated and functioning the resulting voltage over said common circuit C will substantially correspond to 8 the voltage supplied from the electronic control unit, apart from a possible minor voltage drop due to the resistance in the conduit of the circuit C.
If one sensor element, e.g. the first sensor element Si, is non-functioning or deactivated the current will instead flow through the resistor element coupled in parallel to that sensor element, here the first resistor element R1. The resulting voltage over the circuit C will hereby differ with a voltage corresponding to the resistance in that resistor element, here the resistance of the first resistor element R1. Hereby it is possible to determine a nonfunctioning sensor element/ deactivated sensor element although the sensor elements are coupled in series. By having different resistance on the resistor elements it is also possible to determine which sensor element is nonfunctioning/ deactivated.
The resulting voltage over said circuit C is thus determined as a basis for diagnosing the status of the sensor elements S1, S2, S3.
The system I comprises a resistor element R4 coupled to ground G. The arrangement of the resistor element R4 to ground G is configured to facilitate for the system to determine the voltage on the input 10b in a correct way.
The electronic control unit 100 is according to an embodiment configured to determine the status of the sensor units Si, S2, S3 by determining the resulting voltage. The system I comprises means 300 for activating a function. The electronic control unit 100 is operably connected to the means 300 for activating a function via a link 30. The electronic control unit 100 is configured to send a signal to the means 300 representing data for activation of function.
The activation of a function is according to an embodiment presenting the status of the sensor units S1, S2, S3. The electronic control unit 100 is in this case configured to send a signal to the means 300 representing data for status of the sensor units S1, S2, S3, i.e. whether the sensor units are functioning or not. 9 The activation of a function is according to an embodiment The means 300 or another means operably connected to the electronic control unit may be configured to activate/deactivate a vehicle component function based on the result of the status of the sensor units S1, S2, S3. For example the sensor unit S1 is arranged to sense the driver seat status, the sensor units S2 and S3 are arranged to sense the gate to the driver seat, wherein the function may be turning of the engine since it has been determined by the sensor units that the driver is not in the driver position.
According to an embodiment said system comprises at least one sensor unit.
If there is only one sensor unit in the system, a resistor element being coupled in parallel to the sensor unit, it will still be possible in the same way to determine whether the sensor unit is non-functioning by means of the resulting voltage.
The foregoing description of the preferred embodiments of the present invention has been provided for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations will be apparent to practitioners skilled in the art. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to understand the invention for various embodiments and with the various modifications as are suited to the particular use contemplated.

Claims (6)

1. A system (I) for diagnosing the condition of an assembly of sensor units (51, S2, S3) for sensing an activated and deactivated state of a vehicle function for one or more vehicle components, said sensor units (Si, S2, S3) being connected to an electronic control unit (100), a common voltage source (100, 200) being provided for supplying said sensor units, characterized in that said sensor units (Si, S2, S3) are arranged in a common circuit (C) connected to said electronic control unit (100) and arranged in series in said circuit (C), each sensor unit (51, S2, S3) being coupled in parallel with a resistor element (R1, R2, R3); said circuit (C) being arranged to be fed by means of said common voltage source (100, 200), wherein the resulting voltage over said circuit (C) is arranged to be determined as a basis for said diagnosing.
2. A system according to claim 1, wherein the resistance of the resistor element (R1, R2, R3) for the respective sensor unit (Si, S2, S3) differ between the different sensor units (Si, S2, S3).
3. A system according to claim 1 or 2, wherein the voltage source (100) is provided by means of said electronic control unit (100).
4. A system according to any preceding claims, wherein said system comprises at least one sensor unit.
5. A system according to any of claims, wherein said system comprises at least two sensor units.
6. A vehicle (1) comprising a system (I) according to any of claims 1-5. 1/1
SE1550013A 2015-01-09 2015-01-09 System for diagnosing the condition of a sensor assembly in a vehicle SE539748C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE1550013A SE539748C2 (en) 2015-01-09 2015-01-09 System for diagnosing the condition of a sensor assembly in a vehicle
DE102015016615.8A DE102015016615A1 (en) 2015-01-09 2015-12-22 A system for diagnosing the condition of a group of sensor units to detect an activated and deactivated status of a vehicle function for one or more vehicle components

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1550013A SE539748C2 (en) 2015-01-09 2015-01-09 System for diagnosing the condition of a sensor assembly in a vehicle

Publications (2)

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SE1550013A1 true SE1550013A1 (en) 2016-07-10
SE539748C2 SE539748C2 (en) 2017-11-14

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SE1550013A SE539748C2 (en) 2015-01-09 2015-01-09 System for diagnosing the condition of a sensor assembly in a vehicle

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DE (1) DE102015016615A1 (en)
SE (1) SE539748C2 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW512974U (en) 2001-09-07 2002-12-01 Wintecronics Ltd Safety switch of vehicle starting system

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DE102015016615A1 (en) 2016-07-14
SE539748C2 (en) 2017-11-14

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