SE539748C2 - System for diagnosing the condition of a sensor assembly in a vehicle - Google Patents
System for diagnosing the condition of a sensor assembly in a vehicle Download PDFInfo
- Publication number
- SE539748C2 SE539748C2 SE1550013A SE1550013A SE539748C2 SE 539748 C2 SE539748 C2 SE 539748C2 SE 1550013 A SE1550013 A SE 1550013A SE 1550013 A SE1550013 A SE 1550013A SE 539748 C2 SE539748 C2 SE 539748C2
- Authority
- SE
- Sweden
- Prior art keywords
- sensor units
- vehicle
- sensor
- control unit
- electronic control
- Prior art date
Links
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
11 ABSTRACT The present invention relates to a system (l) for diagnosing the condition of anassembly of sensor units (S1 , S2, S3) for sensing an activated and deactivatedstate of a vehicle function for one or more vehicle components. The sensorunits (S1 , S2, S3) are connected to an electronic control unit (100). A commonvoltage source (100, 200) is provided for supplying said sensor units. Thesensor units (S1, S2, S3) are arranged in a common circuit (C) connected tosaid electronic control unit (100) and arranged in series in said circuit (C). Eachsensor unit (S1, S2, S3) is coupled in parallel with a resistor element (R1, R2,F13). The circuit (C) is configured to be fed by means of said common voltagesource (100, 200). The resulting voltage over said circuit (C) is determined asa basis for said diagnosing. The present invention also relates to a vehicle.
Description
- . _ _..._,,h.g_,,._., ._ _, ._,,. ._ _åENêáäfåf-láNåïå-EQR--åš-E-Nå-ê-blå-AN--AGïl-VffiåïE-B-A-NQ--QEAGTF-ifivfàï-E-Eš SYåTEíïri FOR ENAGNOSENG THE CÜNÜETEÜN OF ASENSÜR ASSEPJÉBLY âN A VEHECLE TECHNICAL FIELD The invention relates to a system for diagnosing the condition of an assemblyof sensor units for sensing an activated and deactivated state of a vehiclefunction for one or more vehicle components according to the preamble of claim 1. The invention also relates to a vehicle.
BACKG ROUND ART ln vehicles it is common that assemblies of sensor units are used for sensingactivated and deactivated state of vehicle component function. The status ofthe engine hood of the vehicle, i.e. whether the engine hood is opened orclosed is critical to determine correctly.
US2003047155 discloses solutions including switch elements for detectingwhether an engine hood is closed and a functionality for indicating the needto replace a broken switch element.
An alternative way of determining an activated and deactivated state ofvehicle component function such as the status of the engine hood is using anassembly of sensor units coupled in parallel. Hereby redundancy is obtainedso that the status of the engine hood may be safely determined even if onesensor unit would be defect.
Such a solution, however, requires many inlets on a control unit affecting costs, weight and availability of such in|ets.
OBJECTS OF THE INVENTION An object of the present invention is to provide a system for diagnosing thecondition of an assembly of sensor units for sensing an activated anddeactivated state of a vehicle function for one or more vehicle componentswhich facilitates safe diagnosing in a cost efficient way.
Another object of the present invention is to provide a system for diagnosingthe condition of an assembly of sensor units for sensing an activated anddeactivated state of a vehicle function for one or more vehicle componentswhich is flexible.
SUMMARY OF THE INVENTION These and other objects, apparent from the following description, areachieved by a system and a vehicle as set out in the appended independentclaims. Preferred embodiments of the method and the system are defined inappended dependent claims.
Specifically an object of the invention is achieved by a system for diagnosingthe condition of an assembly of sensor units for sensing an activated anddeactivated state of a vehicle function for one or more vehicle components.The sensor units are connected to an electronic control unit. A commonvoltage source is provided for supplying said sensor units. Said sensor unitsare arranged in a common circuit connected to said electronic control unitand arranged in series in said circuit. Each sensor unit is coupled in parallelwith 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 efficientdiagnosing of the sensor units is facilitated in a cost efficient way in thatfewer outputs/inputs, i.e. only one input and one output, are required. Thecomputing power required is hereby reduced. Such a system further takes upless space and hence requires less cables/conduits. The system furtherfacilitates adding sensor units by coupling additional sensor units in serieswith the other sensor units as no extra output/input is required, the systemthus being more flexible. Such a system may thus have two or more sensorunits coup|ed in series to obtain redundancy, a non-functioning sensor unit still being diagnosable.
According to an embodiment of the system the resistance of the resistorelement for the respective sensor unit differ between the different sensorunits. 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 bymeans of said electronic control unit. By using the electronic control unit asthe 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 isfacilitated. Hereby sensing of functions for different vehicle components isfacilitated.
BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the present invention reference is made to thefollowing detailed description when read in conjunction with theaccompanying 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 Fig. 2 schematically illustrates a system for diagnosing the condition of anassembly 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 avehicle component having an activated state and a deactivated state. Avehicle component function may for example be the function for the enginehood and the status of the function of the engine hood is opened or closed. Avehicle component function may be the gate for a bus driver entering thedriver seat and the status of the function of the gate is opened or closed. Avehicle 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 brakefunction, is gripping the steering wheel, all such states being detectable bymeans of different sensor units. The activated and deactivated state may beany 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, statusof 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 thepresent invention. The exemplified vehicle 1 is a heavy vehicle in the shapeof a truck. The vehicle according to the present invention could be anysuitable vehicle such a bus, a car, a train or the like. The vehicle 1 comprisesa system for diagnosing the condition of an assembly of sensor units forsensing an activated and deactivated state of a vehicle function for one ormore vehicle components. The system is configured for sensing an activatedand deactivated state of a vehicle component function. Such a system may also be arranged to sense activation of a vehicle function for one or morevehicle components so as to know whether a vehicle component function isactivated. Systems having such sensor units require reliable information andhence require efficient diagnosing of the condition of the assembly of sensorunits. The vehicle 1 may comprise several such systems.
Fig. 2 schematically illustrates a system l for diagnosing the condition of anassembly of sensor units S1, S2, S3 for sensing an activated and deactivatedstate of a vehicle function for one or more vehicle components. The numberof 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 sensorunits S1, S2, S3, a first sensor unit S1, a second senor unit S2 and a thirdsensor unit S3. The sensor units S1, S2, S3 are configured to sense anactivated and deactivated state of a vehicle component function. Such avehicle component function could be any suitable vehicle component functionhaving an activated and deactivated state. For example the activated anddeactivated state of the engine hood could be sensed by means of suchsensor units S1, S2, S3.
The system I according to one embodiment of the present invention comprises at least two sensor units.
The sensor units S1, S2, S3 may be configured to sense the status of thesame vehicle component in order to obtain redundancy. For somecomponents in a vehicle it is critical to know the status, i.e. whether it isactivated 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 ofdifferent vehicle components in order to know that a certain function isactivated or deactivated. Here at least one sensor unit is used for sensing the status of the respective component. For example the sensor unit S1 isarranged to sense the position of the hand brake actuator, i.e. if it is on or off,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 threesensor unit S1, S2, S3.
The sensor units S1, S2, S3 are connected to the electronic control unit 100.The sensor units S1, S2, S3 are arranged in the common circuit C, thesensor units S1, S2, S3 being arranged in series in said circuit. Thus, the firstsensor unit S1 is coupled in series with the second sensor unit S2 which inturn is coupled in series with the third sensor unit S3 within the commoncircuit. Additional sensor units could be added in series to the assembly ofsensor units S1, 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. Thevoltage source is provided by means of said electronic control unit 100. Theelectronic control unit is connected to a voltage source 200. The electroniccontrol unit 100 is configured to receive a voltage supplied by means of thevoltage source 200. The electronic control unit 100 is configured to processsaid 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, theelectronic control unit 100 comprises means for processing the voltagesupplied from the voltage source 200 to the electronic control unit such that afixed voltage is supplied from the output 10a in said common circuit. Aresulting voltage over the common circuit may then be determined by meansof the electronic control unit 100. The electronic control unit is thus arranged to measure the voltage over the circuit C.
For example, the voltage provided by the voltage source is configured to be24 V but could vary between e.g. 22 V and 28 V. lf the voltage supplied fromthe voltage source 200 differs from 24 V the electronic control unit will adjustthe 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 F11,F12, F13. The first sensor unit S1 is coupled in parallel with a first resistorelement F11. The second sensor unit S2 is coupled in parallel with a secondresistor element F12. The third sensor unit S3 is coupled in parallel with a third resistor element F13.
The resistance of the resistor element F11, F12, F13 for the respective sensorunit S1, S2, S3 differ between the different sensor units. The resistance ofthe resistor element F11, F12, F13 for the respective sensor unit S1, S2, S3differ between the different sensor units so as to determine which sensor unitis deactivated and/or non-functioning.
The resistance of the first resistor element F11 thus differs from the resistanceof the second resistor element F12 and differs from the resistance of the thirdresistor element F13. Further, the second resistor element F12 differs from thethird resistor element.
By having the resistance of the resistor element F11, F12, F13 for the respectivesensor unit S1, S2, S3 differing between the different sensor units eachsensor unit S1, S2, S3 is thus individually resistor-coded such that it ispossible to determine which sensor unit is deactivated and/or non- functioning. lf the respective sensor element S1, S2, S3 are activated and functioning the resulting voltage over said common circuit C will substantially correspond to 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. lf one sensor element, e.g. the first sensor element S1, is non-functioning ordeactivated the current will instead flow through the resistor element coupledin parallel to that sensor element, here the first resistor element Fï1. Theresulting voltage over the circuit C will hereby differ with a voltagecorresponding to the resistance in that resistor element, here the resistanceof the first resistor element Fï1. Hereby it is possible to determine a non-functioning sensor element/ deactivated sensor element although the sensorelements are coupled in series. By having different resistance on the resistorelements it is also possible to determine which sensor element is non- functioning/ deactivated.
The resulting voltage over said circuit C is thus determined as a basis fordiagnosing the status of the sensor elements S1, S2, S3.
The system I comprises a resistor element F14 coupled to ground G. Thearrangement of the resistor element F14 to ground G is configured to facilitatefor 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 todetermine the status of the sensor units S1, S2, S3 by determining theresulting voltage. The system I comprises means 300 for activating afunction. The electronic control unit 100 is operably connected to the means300 for activating a function via a link 30. The electronic control unit 100 isconfigured to send a signal to the means 300 representing data for activationof function.
The activation of a function is according to an embodiment presenting thestatus of the sensor units S1, S2, S3. The electronic control unit 100 is in thiscase configured to send a signal to the means 300 representing data forstatus of the sensor units S1, S2, S3, i.e. whether the sensor units are functioning or not.
The activation of a function is according to an embodiment The means 300 oranother means operably connected to the electronic control unit may beconfigured to activate/deactivate a vehicle component function based on theresult of the status of the sensor units S1, S2, S3. For example the sensorunit S1 is arranged to sense the driver seat status, the sensor units S2 andS3 are arranged to sense the gate to the driver seat, wherein the functionmay be turning of the engine since it has been determined by the sensorunits that the driver is not in the driver position.
According to an embodiment said system comprises at least one sensor unit.lf there is only one sensor unit in the system, a resistor element beingcoupled in parallel to the sensor unit, it will still be possible in the same wayto determine whether the sensor unit is non-functioning by means of the resulting voltage.
The foregoing description of the preferred embodiments of the presentinvention has been provided for the purposes of illustration and description. ltis not intended to be exhaustive or to limit the invention to the precise formsdisclosed. Obviously, many modifications and variations will be apparent topractitioners skilled in the art. The embodiments were chosen and describedin order to best explain the principles of the invention and its practicalapplications, thereby enabling others skilled in the art to understand theinvention for various embodiments and with the various modifications as are suited to the particular use contemplated.
Claims (5)
1. A system (l) for diagnosing the condition of an assembly of sensor units(S1, S2, S3) for sensing an activated and deactivated state of a vehiclefunction for one or more vehicle components, said sensor units (S1, S2, S3)being connected to an electronic control unit (100), a common voltage source(100, 200) being provided for supplying said sensor units, characterized inthat said sensor units (S1, S2, S3) are arranged in a common circuit (C)connected to said electronic control unit (100) and arranged in series in saidcircuit (C), each sensor unit (S1, S2, S3) being coupled in parallel with aresistor element (F11, R2, RS) »wherein the resistance ot the resistor element(St, H
2. RS) for the respective senser unit (S1 S2, S3) ciiffer betvveen thedifferent senser units 181, S2. S3); said circuit (C) being arranged to be fedby 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. hette-een--thefleiffeFeet-eeh-eer--ett»its--(S-1~-,--S2-,--S3;~=- ______________________ __A system according to claim 1--eaf--fà-ë, wherein the voltage source (100) is provided by means of said electronic control unit (100). A system according to any preceding claims, wherein said system comprises at least one sensor unit. system according to any e-Lgrecedintg claims, wherein saidsystem comprises at least two sensor units. A vehicle (1) comprising a system (l) according to any of claims
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)
| Publication Number | Publication Date |
|---|---|
| SE1550013A1 SE1550013A1 (en) | 2016-07-10 |
| SE539748C2 true SE539748C2 (en) | 2017-11-14 |
Family
ID=56233727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1550013A SE539748C2 (en) | 2015-01-09 | 2015-01-09 | System for diagnosing the condition of a sensor assembly in a vehicle |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102015016615A1 (en) |
| SE (1) | SE539748C2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW512974U (en) | 2001-09-07 | 2002-12-01 | Wintecronics Ltd | Safety switch of vehicle starting system |
-
2015
- 2015-01-09 SE SE1550013A patent/SE539748C2/en not_active IP Right Cessation
- 2015-12-22 DE DE102015016615.8A patent/DE102015016615A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| SE1550013A1 (en) | 2016-07-10 |
| DE102015016615A1 (en) | 2016-07-14 |
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| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |