WO2020200921A1 - Sensoranordnung für ein fahrzeug - Google Patents
Sensoranordnung für ein fahrzeug Download PDFInfo
- Publication number
- WO2020200921A1 WO2020200921A1 PCT/EP2020/058176 EP2020058176W WO2020200921A1 WO 2020200921 A1 WO2020200921 A1 WO 2020200921A1 EP 2020058176 W EP2020058176 W EP 2020058176W WO 2020200921 A1 WO2020200921 A1 WO 2020200921A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- current
- wss
- sensor element
- voltage value
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
- B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
- B60T8/329—Systems characterised by their speed sensor arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
- B60T8/885—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- 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
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/413—Plausibility monitoring, cross check, redundancy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/414—Power supply failure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/40—Failsafe aspects of brake control systems
- B60T2270/416—Wheel speed sensor failure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/30—Sensors
Definitions
- the invention is based on a sensor arrangement for a vehicle according to the preamble of independent claim 1.
- Sensor assemblies for vehicles are known from the prior art, each having a wheel sensor with at least one sensor element per vehicle wheel.
- the individual wheel sensors are usually connected via a two-wire twisted cable to a control unit for a vehicle braking system which, for example, has ABS, ESP, ASR and / or Hillhold functions (ABS: anti-lock braking system, ESP: electronic stability program, ASR: traction control ) executes.
- ABS anti-lock braking system
- ESP electronic stability program
- ASR traction control
- a first connection of the at least one sensor element is connected to an energy source via the control device (high-side path)
- a second connection of the at least one sensor element is connected to ground via the control device (low-side path).
- a sensor current flowing through the at least one sensor element is modulated with information about the rotational speed and / or rotational speed of the corresponding vehicle wheel, an evaluation and control unit of the control unit evaluating the sensor current detected between the at least one sensor element and ground.
- a sensor arrangement with a sensor for detecting a measured variable which has a first evaluation unit with a first measuring resistor to which a sensor signal representing the measured variable is fed to generate a measured voltage drop, and a second evaluation unit with a second Measuring resistor, to which a sensor signal from the sensor representing the measured variable is fed to generate a measured voltage drop, a first voltage source which is connected to the first evaluation unit is connected, a second voltage source which is connected to the second evaluation unit, and switching means which are connected to the sensor and are designed in such a way that if one evaluation unit fails, a measurement voltage drop can be generated at the measuring resistor of the other evaluation unit.
- the senor is connected on the voltage side to the first voltage source via the first measuring resistor and on the ground side to a ground via the second measuring resistor.
- a first diode-Zener diode combination is connected in parallel to the first measuring resistor and a second diode-Zener diode combination is connected in parallel to the second measuring resistor, with the first and second diode-Zener diode combination each having a breakdown voltage that is greater than the measured voltage drop is such that if an evaluation unit fails, a breakdown of the associated diode-Zener diode combination can be brought about.
- a further first diode-Zener diode combination can be provided, which is arranged between the sensor and the second voltage source.
- one end of the second diode-Zener diode combination can be connected to a ground connection of the second evaluation unit, and a further second diode-Zener diode combination can be connected to a ground connection of the first evaluation unit.
- the sensor arrangement for a vehicle with the features of independent claim 1 has the advantage that a first emergency protection circuit monitors a low-side path and, in the event of a defective low-side path, provides an alternative low-side path without current detection for the sensor element so that at least one first measuring circuit can continue to evaluate the detected sensor current.
- the first emergency protection circuit becomes active when the voltage drop at the second measuring connection of the sensor element exceeds, for example, a breakover voltage value which can be specified in the range from 2.0V to 4.0V.
- the active first emergency protection circuit limits the voltage drop at the second measuring connection of the sensor element, for example, to a holding voltage value in the range from approx. 0.8V to 1.5V and is able to accept a sensor current of up to 50mA. Therefore, the emergency protection circuit of the emergency protection circuit according to the invention is active State, in contrast to a pure Zener diode structure, a significantly smaller voltage drop with a similar load current.
- Embodiments of the present invention provide a sensor unit for a vehicle which comprises a sensor element for detecting a measured variable and at least two control devices, each of which has a measuring circuit and an energy source.
- a first connection of the sensor element is connected to an energy source of a first control device of the at least two control devices, and a second connection of the sensor element is connected to a ground connection via a measuring circuit of a second control device of the at least two control devices.
- a sensor current flowing through the sensor element is modulated with information about the measured variable detected, with a measuring circuit of the first control device evaluating the sensor current detected in the high-side path between the energy source and the sensor element, and a second measuring circuit of the second control device simultaneously evaluating the evaluates sensor current detected in the low-side path between the sensor element and the ground connection.
- a first emergency protection circuit is arranged parallel to the low-side path and monitors a voltage drop at the second connection of the sensor element. The first emergency protection circuit provides an alternative low-side path for the sensor element and picks up the sensor current when the voltage drop reaches a predetermined breakover voltage value, so that at least the first measuring circuit can continue to evaluate the detected sensor current.
- the first emergency protection circuit reduces the voltage drop to a holding voltage value which is smaller than the breakover voltage value.
- Such a sensor arrangement for a vehicle also has the advantage that the sensor signal of the respective sensor element via the tap between the energy source and sensor element (high-side path) within the first control device and via the tap between the sensor element and ground (low-side Path) is available in the second control unit and can therefore be evaluated by two evaluation and control units at the same time.
- a measuring circuit of a first evaluation and control unit of the first control device evaluates the sensor current detected in the high-side path
- a second measuring circuit of a second evaluation and control unit of the second control device simultaneously evaluates the sensor current recorded in the low-side path.
- embodiments of the sensor arrangement according to the invention can comprise a plurality of sensor elements which are distributed in the vehicle at one measuring point.
- embodiments of the present sensor arrangement can preferably be used in a vehicle braking system.
- the measuring points can each be assigned to a vehicle wheel, for example, wherein a corresponding sensor element can detect at least one rotational speed and / or rotational speed of the assigned vehicle wheel.
- the sensor elements can also be arranged at other measuring points in the vehicle.
- the sensor elements can also record other measured variables, such as temperature, pressure, etc.
- the evaluation and control unit can be understood to mean an electrical circuit which processes or evaluates detected sensor signals.
- the evaluation and control unit can have at least one interface that can be designed in terms of hardware and / or software.
- the interfaces can, for example, be part of a so-called system ASIC, which contains a wide variety of functions of the evaluation and control unit.
- the interfaces are separate, integrated circuits or at least partially consist of discrete components.
- the interface can be software modules that are present, for example, on a microcontroller in addition to other software modules.
- control device can be understood as an electrical device, such as a brake control device, which, in conjunction with a hydraulic brake system, has various braking functions, such as ABS, ESP, ASR and / or Hillhold functions (ABS: anti-lock braking system , ESP: electronic stability program, ASR: traction control).
- ABS anti-lock braking system
- ESP electronic stability program
- ASR traction control
- the two control units can perform various braking functions in normal operation. If one of the control units fails, it can be provided that the other control unit takes over the braking functions of the failed control unit.
- a sensor element is understood to mean an electrical component which, in the area of an assigned vehicle wheel, directly or indirectly detects a physical variable or a change in a physical variable and preferably converts it into an electrical sensor signal. This can be done, for example, via the transmission and / or reception of sound and / or electromagnetic waves and / or via a magnetic field or the change in a magnetic field.
- Optical sensor elements are possible which, for example, have a photographic plate and / or a fluorescent surface and / or a semiconductor which detect the impact or the intensity, the wavelength, the frequency, the angle, etc. of the received wave, such as, for example Infrared sensor elements.
- An acoustic sensor element is also conceivable, such as an ultrasonic sensor element and / or a high-frequency sensor element and / or a radar sensor element and / or a sensor element that reacts to a magnetic field, such as a Hall sensor element and / or a magnetoresistive sensor element and / or an inductive sensor element which registers the change in a magnetic field, for example via the voltage generated by magnetic induction.
- the first emergency protection circuit can automatically disconnect the alternative low-side path again when the voltage drop due to an external event falls below a switch-off voltage value which is lower than the holding voltage value.
- the drop in the voltage drop can be caused, for example, by the fact that the original low-side path has been reactivated and is available again.
- a second emergency protection circuit the mode of operation of which corresponds to the first emergency protection circuit, can be arranged parallel to the high-side path and monitor a voltage drop at the first connection of the sensor element.
- the second emergency protection circuit can provide an alternative high-side path for the sensor element and absorb the sensor current when the voltage drop reaches a predetermined breakover voltage value, so that at least the second measuring circuit can continue to evaluate the sensed sensor current.
- the second emergency protection circuit reduces the voltage drop to a holding voltage value which is smaller than the breakover voltage value.
- the second emergency protection circuit can automatically disconnect the alternative high-side path again if the voltage drop due to an external event falls below a switch-off voltage value which is lower than the holding voltage value.
- the switch-off voltage value can for example be specified in a range from 0.4V to 0.7V.
- the respective emergency protection circuit can include a voltage detection and a current sink.
- the voltage detection controls the current sink to establish a current path between connections of the corresponding emergency protection circuit.
- the voltage detection can detect the voltage drop between a first connection and a second connection of the corresponding emergency protection circuit and control the current sink when the detected voltage drop reaches the predetermined breakover voltage value.
- the current sink can set the voltage drop to the specified holding voltage value via a transistor and absorb the sensor current.
- the voltage detection in conjunction with an overvoltage protection can reduce the current sink if the voltage drop increases, control it in such a way that the sensor current can be reduced to a minimum current flow or switched off entirely.
- the current sink is advantageously protected from too high a current flow or from too high a total power loss, which could lead to damage to the current sink and the corresponding emergency protection circuit.
- the voltage detection can terminate the control of the current sink and interrupt the current path again when the detected voltage drop falls below the predetermined switch-off voltage value.
- the Current sensor detect the sensor current in the high-side path and branch off a fraction of the sensor current and make it available as the first measurement current of the first measuring circuit of the first control device.
- the second measuring circuit of the second control device can receive and evaluate the sensor current directly as a second measuring current.
- the current sensor can be looped into the current path, for example, and branch off the fraction of the sensor current and pass the remaining sensor current on to the sensor element. As a result, the sensor current which flows into the first connection of the associated sensor element is measured and an equivalent, but significantly smaller fraction of the sensor current is passed on to the first measuring circuit. This allows the power loss in the first control unit to be reduced.
- a switching device can connect the first connection of the sensor element to the first energy source and / or to the second energy source, the switching device automatically connecting the first connection of the sensor element to the other energy source if the connected energy source fails can.
- the current sensor and the switching device can be combined in an interconnection module which can be implemented as an ASIC module.
- Fig. 1 shows a schematic block diagram of a firstmittedsbei game of a sensor arrangement according to the invention for a vehicle.
- Fig. 2 shows a schematic block diagram of a secondUEsbei game of a sensor arrangement according to the invention for a vehicle.
- Fig. 3 shows a schematic block diagram of a thirdheldsbei game of a sensor arrangement according to the invention for a vehicle.
- Fig. 4 shows a schematic block diagram of a fourthheldsbei game of a sensor arrangement according to the invention for a vehicle.
- FIG. 5 shows a schematic block diagram of an exemplary embodiment of an emergency protection circuit of the sensor arrangement according to the invention for a vehicle from FIGS. 1 to 4.
- FIG. 6 shows a circuit diagram of the emergency protection circuit from FIG. 5.
- FIG. 7 shows a schematic current-voltage diagram of the emergency protection circuit from FIGS. 5 and 6.
- a first connection WSS1 of the sensor element WSS with an energy source VB1 of a first control device ECU1, ECU1A, ECU1B, ECU1C, ECU1D of the at least two control devices ECU1, ECU1A, ECU1B, ECU1C, ECU1D, ECU2, ECU2A, ECU2B, ECU2C, ECU2D connected, and a second connection WSS2 of the sensor element WSS is via a measuring circuit MSI, MS2 of a second control unit ECU2, ECU2A, ECU2B, ECU2C, ECU2D of the at least two control units ECU1, ECU1A, ECU1B, ECU1C, ECU1D, ECU2, ECU2A, ECU2B, ECU2C, ECU2D connected to a ground connection GND.
- a sensor current Is flowing through the sensor element WSS is modulated with information about the measured variable detected, with a first measuring circuit MSI of the first control device ECU1, ECU1A, ECU1B, ECU1C, ECU1D in the high-side path between the energy source VB1 and the Sensor element WSS evaluates the sensor current Is detected, and a second measuring circuit MS2 of the second control device ECU2, ECU2A, ECU2B, ECU2C, ECU2D simultaneously evaluates the sensor current Is detected in the low-side path between the sensor element WSS and the ground connection GND. Furthermore, a first emergency protection circuit 20A is arranged parallel to the low-side path and monitors a voltage drop U12 at the second connection WSS2 of the sensor element WSS.
- the first emergency protection circuit 20A provides an alternative low-side path for the sensor element WSS and absorbs the sensor current Is when the voltage drop U12 reaches a predetermined breakover voltage value UK shown in FIG. 7, so that at least the first measuring circuit MSI continues can evaluate the detected sensor current Is. In addition, the first emergency protection circuit 20A reduces the voltage drop U12 to a holding voltage value UH shown in FIG. 7, which is smaller than the breakover voltage value UK.
- the two control units ECU1, ECU1A, ECU1B, ECU1C, ECU1D, ECU2, ECU2A, ECU2B, ECU2C, ECU2D in the illustrated embodiments each have an ASIC led evaluation and control unit 3A, 3B, in which the respective measuring circuit MSI, MS2 is integrated, and an energy source VB1, VB2.
- a first evaluation and control unit 3A is connected to the first energy source VB1 in the first control unit ECU1, ECU1A, ECU1B, ECU1C, ECU1D.
- the second control unit ECU2, ECU2A, ECU2B, ECU2C, ECU2D there is one in each case second evaluation and control unit 3B connected to the second energy source VB2.
- embodiments of the inventive sensor arrangement 1, 1A, 1B, IC, ID for a vehicle comprise a plurality of measuring points, each with one such sensor element WSS.
- the measuring points can, for example, each be assigned to a vehicle wheel, with the sensor elements WSS being able to detect at least one rotational speed and / or rotational speed of the corresponding vehicle wheel.
- the sensor arrangement 1, 1A, 1B, IC, ID thus has four such sensor elements WSS.
- other measured variables such as temperature, pressure, etc. can also be recorded at such a measuring point.
- the first emergency protection circuit 20A automatically disconnects the alternative low-side path in the illustrated embodiment when the voltage drop U12 falls below a shutdown voltage value ABS which is smaller than the holding voltage value UH due to an external event.
- the operation of the first emergency protection circuit 20A will be described in detail below with reference to FIGS. 5 to 7.
- a second emergency protection circuit 20B shown in dotted lines, is optionally provided, which is arranged parallel to the high-side path and a voltage drop U12 at the first connection WSS1 of the sensor element WSS is monitored.
- the second emergency protection circuit 20B provides an alternative high-side path for the sensor element WSS and picks up the sensor current Is so that at least the second measuring circuit MS2 can continue to evaluate the detected sensor current Is when the voltage drop U12 reaches a predetermined breakover voltage value UK , the second emergency protection circuit 20B additionally reducing the voltage drop U12 to a holding voltage value UH which is smaller than the breakover voltage value is UK.
- the second emergency protection circuit 20B automatically disconnects the alternative high-side path again when the voltage drop U12 falls below a shutdown voltage value ABS from an external event, which is lower than the holding voltage value UH.
- the emergency protection circuits 20A, 20B each comprise a voltage detection 22 and a current sink 24.
- the voltage detection 22 controls the current sink 24 to establish a current path between terminals A1, A2 of the corresponding emergency protection circuit 20A, 20B on.
- the voltage detection 22 detects the voltage drop U12 between a first connection A1 and a second connection A2 of the corresponding emergency protection circuit 20A, 20B and controls the current sink 24 when the detected voltage drop U12 reaches the predetermined breakover voltage value UK shown in FIG. 7.
- the current sink 24 sets the voltage drop U12 to the predetermined holding voltage value UH and absorbs the sensor current Is. This characteristic curve is shown in FIG. 7 by a solid line.
- the voltage detection 22 controls the current sink 24 when the voltage drop U12 rises in such a way that the sensor current Is is reduced to a minimum current flow or switched off completely.
- This Schutzver run SV is shown in Fig. 7 with dots.
- the voltage detection 22 terminates the activation of the current sink 24 and interrupts the current path again when the detected voltage drop U12 falls below the predetermined switch-off voltage value ABS.
- This shutdown curve is shown in dashed lines in FIG.
- the voltage detection 22 in the illustrated embodiment comprises several ohmic resistors RI, R2, R3,
- the current sink 24 includes two ohmic resistors R6 and R7 and two transistors T3 and T4 designed as bipolar transistors, which are connected to one another via corresponding lines as shown, where both transistors T3 and T4 are designed as NPN transistors.
- the overvoltage protection ÜV includes an ohmic resistor R8.
- the resistors RI, R2 and R6 are leakage resistors for the bases of the transistors TI, T2, T3 in order to keep them blocked and to derive leakage currents. If a larger current flows through the Zener diode ZD1 than through a second resistor R2, then the second transistor T2 is turned on, which turns on the first transistor TI. In the exemplary embodiment shown, this is the case when the applied voltage drop U12 exceeds the breakover voltage value UK of approximately 3V. This breakover voltage value corresponds to the sum of the breakdown voltage (approx. 2.3V) of the Zener diode ZD1 and a base-emitter voltage (approx. 0.7V) of the second transistor T2.
- the first transistor TI supplies current to the base of the second transistor T2 via a fourth resistor R4, so that the latter remains switched on.
- the second transistor T2 and the first transistor TI form a thyristor structure and bridge the Zener diode ZD1, so that the voltage drop U12 is set to the holding voltage value UH of approximately 0.9V.
- the fourth transistor T4 of the current sink 24 is controlled via a fifth resistor R5 and a control line ST, the sensor current Is now flowing through the fourth transistor T4 being limited to approximately 40 mA in the illustrated embodiment.
- the third transistor T3 of the current sink 24 takes over part of the control current for the fourth transistor T4 in order to protect it.
- the current sink 24 is offered a current which is greater than a maximum load current of the current sink ke 24 is, then the current sink 24 can no longer hold the low holding voltage value UH of the voltage drop U12 of approximately 0.9V. Therefore, the current increases through the eighth resistor R8 of the overvoltage protection ÜV. This has the consequence that the third transistor T3 is turned on more and the control of the fourth transistor T4 is reduced. This reduces the current into the base of the fourth transistor T4 and the fourth transistor T4 is closed further and protected from damage (overload protection). In the event of a short circuit, the fourth transistor T4 can be switched to the blocking state.
- the sensor arrangements 1, 1A, 1B, IC and ID for a vehicle in the illustrated embodiments each include a current sensor 10, which records the sensor current Is in the high-side path and a fraction Is / h of the sensor current Is branches off and makes it available as the first measurement current IM1 of the first measurement circuit MSI of the first control unit ECU1, ECU1A, ECU1B, ECU1C, ECU1D.
- the first control unit ECU1, ECU1A, ECU1B, ECU1C, ECU1D the first control unit
- the second measuring circuit MS2 of the second control unit ECU2, ECU2A, ECU2B, ECU2C, ECU2D in the illustrated exemplary embodiments receives the sensor current Is directly as the second measuring current IM2 and evaluates it.
- the sensor current Is which flows into the first connection WSS1 of the sensor element WSS, is measured by the current sensor 10, and an equivalent but significantly smaller current Is / n is fed to the first evaluation and control unit 3A to reduce the power loss in the first control unit ECU1, ECU1A, ECU1B, ECU1C, ECU1D.
- the first evaluation and control unit 3A takes into account the reduction in the second measurement current.
- an input circuit of the first measuring circuit MSI or the evaluation algorithm can be adapted accordingly.
- the first emergency protection circuit 20A and the optional second emergency protection circuit 20B are in the illustrated first configuration.
- Execution example of the sensor arrangement 1A for a vehicle each executed as separate assemblies, and not integrated into one of the two control units ECU1A, ECU2A.
- the current sensor 10 which detects the sensor current Is in the high-side path and branches off a fraction Is / h of the sensor current Is, is, however, integrated into the first control unit ECU1A in the illustrated first embodiment.
- the first emergency protection circuit 20A in the illustrated second exemplary embodiment of the sensor arrangement 1B for a vehicle is integrated into the first control unit ECU1A.
- the optional second emergency protection circuit 20B is integrated into the second control unit ECU2B in the illustrated second exemplary embodiment of the sensor arrangement 1B for a vehicle.
- the current sensor 10 is integrated into the first control unit ECU1B in the same way as the first exemplary embodiment.
- the sensor arrangements IC, ID for a vehicle in the illustrated exemplary embodiments each comprise a switching device 30 which connects the first connection WSS1 of the sensor element WSS to the first energy source VB1 of the first control unit ECU1C, ECU1D and / or connects to the second energy source VB2 of the second control unit ECU2C, ECU2D. If the connected energy source VB1, VB2 fails, the switching device 30 automatically connects the first connection WSS1 of the sensor element WSS to the other energy source VB2, VB1. The switching device 30 preferably connects the first connection WSS1 of the sensor element WSS to the first energy source VB1 of the first control device ECU1C, ECU1D. If the first energy source VB1 fails, the switching device 30 connects the first connection WSS1 of the sensor element WSS to the second energy source VB2 of the second control unit ECU2C, ECU2D.
- the current sensor 10 and the order switching device 30 are combined in the illustrated embodiments in a Ver circuit module 40, which can be designed, for example, as an ASIC module.
- the first emergency protection circuit 20A in the illustrated third embodiment of the sensor arrangement IC for a vehicle is designed as a separate assembly, and not integrated into one of the two control devices ECU1C, ECU2C.
- the interconnection module 40 is also designed as a separate assembly and not in one of the control units ECU1C,
- the first emergency protection circuit 20A can, however, be integrated into the first control unit ECU1C analogously to the second exemplary embodiment of the sensor arrangement 1B.
- the first emergency protection circuit 20A in the illustrated fourth exemplary embodiment of the sensor arrangement ID for a vehicle is integrated into the first control unit ECU1D.
- the interconnection module 40 is also integrated into the first control unit ECU1D.
- the first emergency protection circuit 20A can, analogously to the first and third exemplary embodiment of the sensor arrangement 1B, however, be designed as a separate assembly and not be integrated into the first control unit ECU1C.
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Protection Of Static Devices (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Measurement Of Current Or Voltage (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR1020217031321A KR20210142649A (ko) | 2019-04-01 | 2020-03-24 | 차량용 센서 어셈블리 |
JP2021558730A JP7374212B2 (ja) | 2019-04-01 | 2020-03-24 | 車両用センサ装置 |
CN202080026843.2A CN113711284A (zh) | 2019-04-01 | 2020-03-24 | 用于车辆的传感器组件 |
US17/599,776 US20220131364A1 (en) | 2019-04-01 | 2020-03-24 | Sensor Assembly for a Vehicle |
Applications Claiming Priority (2)
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DE102019204619.3 | 2019-04-01 | ||
DE102019204619.3A DE102019204619A1 (de) | 2019-04-01 | 2019-04-01 | Sensoranordnung für ein Fahrzeug |
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WO2020200921A1 true WO2020200921A1 (de) | 2020-10-08 |
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PCT/EP2020/058176 WO2020200921A1 (de) | 2019-04-01 | 2020-03-24 | Sensoranordnung für ein fahrzeug |
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US (1) | US20220131364A1 (de) |
JP (1) | JP7374212B2 (de) |
KR (1) | KR20210142649A (de) |
CN (1) | CN113711284A (de) |
DE (1) | DE102019204619A1 (de) |
WO (1) | WO2020200921A1 (de) |
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DE102018002990A1 (de) * | 2018-04-12 | 2019-10-17 | Lucas Automotive Gmbh | Hydraulische Kraftfahrzeug-Bremsanlage und Verfahren zum Betreiben derselben |
KR20230170320A (ko) | 2022-06-10 | 2023-12-19 | 현대트랜시스 주식회사 | 제어기 보호장치 및 그 방법 |
CN115140008B (zh) * | 2022-09-06 | 2022-12-23 | 万向钱潮股份公司 | 一种车辆制动***控制装置 |
Citations (2)
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DE102016222628A1 (de) | 2016-11-17 | 2018-05-17 | Continental Teves Ag & Co. Ohg | Sensoranordnung mit einem Sensor zum redundanten Erfassen einer Messgröße und ein elektrohydraulisches Bremssystem mit einer solchen Sensoranordnung |
DE102017005071A1 (de) * | 2017-05-27 | 2018-11-29 | Wabco Gmbh | Verfahren zum Betreiben eines Drehzahlsensors in einem Fahrzeug, sowie Sensoranordnung |
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JPH0826091A (ja) * | 1994-07-15 | 1996-01-30 | Sumitomo Electric Ind Ltd | 車輪速センサ信号系の故障検出装置 |
JPH08178970A (ja) * | 1994-12-19 | 1996-07-12 | Hewlett Packard Japan Ltd | 電流測定装置 |
JP3455683B2 (ja) | 1998-10-08 | 2003-10-14 | 富士通テン株式会社 | 負荷電流検出回路 |
JP5699301B2 (ja) | 2010-02-23 | 2015-04-08 | アルプス・グリーンデバイス株式会社 | 電流センサ |
US9440632B2 (en) * | 2014-11-05 | 2016-09-13 | Bendix Commercial Vehicle Systems Llc | Method, controller and system for monitoring brake operation |
KR102454021B1 (ko) * | 2016-04-15 | 2022-10-14 | 현대모비스 주식회사 | 휠센서 인터페이스 장치 |
DE102018204615A1 (de) * | 2018-03-27 | 2019-10-02 | Robert Bosch Gmbh | Sensoranordnung für ein Fahrzeug |
DE102018204599A1 (de) * | 2018-03-27 | 2019-10-02 | Robert Bosch Gmbh | Sensoranordnung für ein Fahrzeug |
-
2019
- 2019-04-01 DE DE102019204619.3A patent/DE102019204619A1/de active Pending
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- 2020-03-24 JP JP2021558730A patent/JP7374212B2/ja active Active
- 2020-03-24 WO PCT/EP2020/058176 patent/WO2020200921A1/de active Application Filing
- 2020-03-24 KR KR1020217031321A patent/KR20210142649A/ko active Search and Examination
- 2020-03-24 CN CN202080026843.2A patent/CN113711284A/zh active Pending
- 2020-03-24 US US17/599,776 patent/US20220131364A1/en active Pending
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102016222628A1 (de) | 2016-11-17 | 2018-05-17 | Continental Teves Ag & Co. Ohg | Sensoranordnung mit einem Sensor zum redundanten Erfassen einer Messgröße und ein elektrohydraulisches Bremssystem mit einer solchen Sensoranordnung |
DE102017005071A1 (de) * | 2017-05-27 | 2018-11-29 | Wabco Gmbh | Verfahren zum Betreiben eines Drehzahlsensors in einem Fahrzeug, sowie Sensoranordnung |
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CN113711284A (zh) | 2021-11-26 |
DE102019204619A1 (de) | 2020-10-01 |
JP7374212B2 (ja) | 2023-11-06 |
US20220131364A1 (en) | 2022-04-28 |
JP2022527520A (ja) | 2022-06-02 |
KR20210142649A (ko) | 2021-11-25 |
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