WO2002025614A1 - Road vehicle driver monitoring system - Google Patents

Road vehicle driver monitoring system Download PDF

Info

Publication number
WO2002025614A1
WO2002025614A1 PCT/GB2001/004165 GB0104165W WO0225614A1 WO 2002025614 A1 WO2002025614 A1 WO 2002025614A1 GB 0104165 W GB0104165 W GB 0104165W WO 0225614 A1 WO0225614 A1 WO 0225614A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
warning
vehicle
control means
warning signal
Prior art date
Application number
PCT/GB2001/004165
Other languages
French (fr)
Inventor
John Brian Revell
Original Assignee
John Brian Revell
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
Priority claimed from GB0022927A external-priority patent/GB2356959B/en
Application filed by John Brian Revell filed Critical John Brian Revell
Priority to AU2001287885A priority Critical patent/AU2001287885A1/en
Publication of WO2002025614A1 publication Critical patent/WO2002025614A1/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/06—Alarms for ensuring the safety of persons indicating a condition of sleep, e.g. anti-dozing alarms
    • 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
    • B60K28/02—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 driver
    • B60K28/06—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 driver responsive to incapacity of driver
    • 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
    • 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
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D15/00—Steering not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/18—Steering angle

Definitions

  • This invention relates to a road vehicle driver monitoring system.
  • Background to the Invention Many deaths and serious injuries result each year from road vehicle drivers falling asleep at the wheel or suffering heart attacks or strokes.
  • sensors For example, they depend on the driver maintaining his head in a precise position, which in practice would not occur, and are very expensive to manufacture and install.
  • Another proposal involves the use of a hat with a mercury switch arranged to switch on an alarm in response to a nodding movement of the head indicating drowsiness. This requires the driver to wear the hat and to switch on the alarm circuit; there is no way to ensure that the driver remembers to do this.
  • Such systems typically comprise electromechanical or opto-electrical detectors associated with the steering column, converting rotation of the column into an electrical signal. An electronic circuit detects such signals and is arranged to generate an alarm signal when the signals fall below a pre-determined threshold.
  • a road vehicle driver monitoring system comprising a steering system for the vehicle, the steering system having a power-assistance mechanism to assist in movement thereof, sensor means for generat- ing an activity signal in response to operation of the power-assistance mechanism, and control means connected to the sensor means and arranged to generate a warning signal when the activity signal falls below a pre-determined level.
  • control means may be arranged to generate a warning signal in response to the absence of a signal for a pre-determined period of time.
  • the system may be provided with a signal indicative of the vehicle's speed, for example from the vehicle's speedometer, and may be arranged to be inoperative below a pre-determined speed, since the system is unlikely to be required in such circumstances as traffic jams where some time is likely to pass without a steering manoeuvre being made.
  • the system may be arranged to vary the said pre-determined period of time in propor- tion to the speed signal, since, for example, a period of inactivity of 5 seconds at 50mph may require to be reduced to 3 seconds or less at 70mph.
  • the control means may comprise a microprocessor programmed to monitor the activity signal and to determine the period of time when the signal is below a threshold value.
  • the microprocessor may be programmed to monitor the changes in activity signal with time and to compare the resulting pattern with a stored pattern representing a risk of driver drowsiness or inattention, generating a warning in response to detection of the pattern.
  • the power-assistance mechanism will typically be a hydraulic system, and the sensor means is preferably arranged to monitor changes in hydraulic pressure within the mechanism, but other forms of mechanism may be employed, for example an electrical system, the sensor means being arranged to monitor the electrical current in the mechanism, for example in an actuating motor or the like.
  • a pressure transducer In the case of a hydraulic mechanism, where a pressure transducer is already provided, this may be employed as the sensor means, the signal from the transducer being fed to the control means.
  • a pressure transducer may alternatively be fitted to serve as the sensor means, either as a conversion for an existing mechanism when retrofitting the system into a vehicle, or as a component included in original manufacture.
  • the warning signal may serve to operate an audible warning device, a visible warning device, or a combination of the two.
  • the warning signal may further be used to trigger external warning lights to alert the drivers of adjacent vehicles, and/or to interrupt the fuel supply to the vehicle's engine and to gradually apply the vehicle's brakes.
  • the system of the invention requires no modifications to the steering column, and therefore involves no adaptation of the interior of the vehicle, other than to pro- vide warning devices adjacent to the driver.
  • the drawing illustrates in block diagram form a system in accordance with an exemplary embodiment of the invention.
  • the system comprises a microprocessor 1 equipped with flash memory for the storage of an operating program, different programs being loadable for different types of vehicle, or possibly even for an individual vehicle driver's characteristics, for example.
  • a pressure transducer 2 is fitted to a convenient point in the hydraulic system to give an output signal proportional to the pressure, which will vary according to the degree of rotation of the steering wheel and the speed of the vehicle, greater assistance being required for low-speed manoeuvres, for example, than for high speed manoeuvres.
  • the signal from the pressure transducer 2 is fed to a 2-channel multiplexer 3, which also has an input 4 from the vehicle speedometer or other vehicle speed sensor.
  • the output from the multiplexer 3 is fed to a 12-bit analogue to digital converter 5 connected to the microprocessor 1 , which may be programmed to watch for pre-determined periods of lack of signal from the transducer 2, or for pre-determined periods of signal falling below a threshold value, or for a predetermined pattern of signals from the transducer. In each case, the operation of the monitoring may be switched off when the vehicle's speed is below a threshold value, and may be varied in response to the speed input at 4.
  • the microprocessor 1 may generate a warning signal on output line 6 to cause an audible alarm to sound and/or visible warnings to appear. If the condition is not rectified within a predetermined time period, the microprocessor may be programmed to generate one or more of: a signal on fuel line 7 to close a valve in the vehicle's fuel line; a signal on brake line 8 to cause gradual operation of the vehicle's braking system; and a signal on hazard line 9 to cause operation of the vehicle's external hazard warning lights to alert drivers of nearby vehicles to the potentially hazardous condition of the vehicle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

A road vehicle driver monitoring system comprises a steering system for the vehicle, the steering system having a power-assistance mechanism to assist in movement thereof, sensor means (2) for generating an activity signal in response to operation of the power-assistance mechanism, and control means (1) connected to the sensor means and arranged to generate a warning signal when the activity signal falls below a pre-determined level.

Description

ROAD VEHICLE DRIVER MONITORING SYSTEM Field of the Invention
This invention relates to a road vehicle driver monitoring system. Background to the Invention Many deaths and serious injuries result each year from road vehicle drivers falling asleep at the wheel or suffering heart attacks or strokes. There have been many proposals for systems to monitor a driver to detect onset of sleep or incapacity and to provide an audible warning. For example, it has been proposed to install sensors to monitor eye movement. However, these depend on the driver maintaining his head in a precise position, which in practice would not occur, and are very expensive to manufacture and install. Another proposal involves the use of a hat with a mercury switch arranged to switch on an alarm in response to a nodding movement of the head indicating drowsiness. This requires the driver to wear the hat and to switch on the alarm circuit; there is no way to ensure that the driver remembers to do this. Various documents, for example US-A-4509040, US-A-4017843 and US-A-
3678494, disclose systems which monitor the movements of the vehicle's steering wheel. This is based on the observation that, even on a straight road, the driver is required to make regular small correcting movements of the steering wheel, and so the absence of such movements might indicate inattention or drowsiness of the driver. Such systems typically comprise electromechanical or opto-electrical detectors associated with the steering column, converting rotation of the column into an electrical signal. An electronic circuit detects such signals and is arranged to generate an alarm signal when the signals fall below a pre-determined threshold.
A problem with such systems is that each steering column in each different type of vehicle is mounted and encased in a different way, requiring individual construction and mounting of the rotation detector, in some vehicles, there is insufficient space to install a detector. In each case, the detector will need to be individually calibrated. The cost of installation will therefore be high. Summary of the Invention
According to the invention, there is provided a road vehicle driver monitoring system, comprising a steering system for the vehicle, the steering system having a power-assistance mechanism to assist in movement thereof, sensor means for generat- ing an activity signal in response to operation of the power-assistance mechanism, and control means connected to the sensor means and arranged to generate a warning signal when the activity signal falls below a pre-determined level.
For example, the control means may be arranged to generate a warning signal in response to the absence of a signal for a pre-determined period of time. The system may be provided with a signal indicative of the vehicle's speed, for example from the vehicle's speedometer, and may be arranged to be inoperative below a pre-determined speed, since the system is unlikely to be required in such circumstances as traffic jams where some time is likely to pass without a steering manoeuvre being made. Optionally, the system may be arranged to vary the said pre-determined period of time in propor- tion to the speed signal, since, for example, a period of inactivity of 5 seconds at 50mph may require to be reduced to 3 seconds or less at 70mph.
The control means may comprise a microprocessor programmed to monitor the activity signal and to determine the period of time when the signal is below a threshold value. Alternatively, the microprocessor may be programmed to monitor the changes in activity signal with time and to compare the resulting pattern with a stored pattern representing a risk of driver drowsiness or inattention, generating a warning in response to detection of the pattern.
The power-assistance mechanism will typically be a hydraulic system, and the sensor means is preferably arranged to monitor changes in hydraulic pressure within the mechanism, but other forms of mechanism may be employed, for example an electrical system, the sensor means being arranged to monitor the electrical current in the mechanism, for example in an actuating motor or the like.
In the case of a hydraulic mechanism, where a pressure transducer is already provided, this may be employed as the sensor means, the signal from the transducer being fed to the control means. A pressure transducer may alternatively be fitted to serve as the sensor means, either as a conversion for an existing mechanism when retrofitting the system into a vehicle, or as a component included in original manufacture.
The warning signal may serve to operate an audible warning device, a visible warning device, or a combination of the two. The warning signal may further be used to trigger external warning lights to alert the drivers of adjacent vehicles, and/or to interrupt the fuel supply to the vehicle's engine and to gradually apply the vehicle's brakes.
The system of the invention requires no modifications to the steering column, and therefore involves no adaptation of the interior of the vehicle, other than to pro- vide warning devices adjacent to the driver. Brief Description of the Drawing
The drawing illustrates in block diagram form a system in accordance with an exemplary embodiment of the invention. Detailed Description of the Illustrated Embodiment The system comprises a microprocessor 1 equipped with flash memory for the storage of an operating program, different programs being loadable for different types of vehicle, or possibly even for an individual vehicle driver's characteristics, for example. In the case of a hydraulic steering assistance mechanism, a pressure transducer 2 is fitted to a convenient point in the hydraulic system to give an output signal proportional to the pressure, which will vary according to the degree of rotation of the steering wheel and the speed of the vehicle, greater assistance being required for low-speed manoeuvres, for example, than for high speed manoeuvres. The signal from the pressure transducer 2 is fed to a 2-channel multiplexer 3, which also has an input 4 from the vehicle speedometer or other vehicle speed sensor. The output from the multiplexer 3 is fed to a 12-bit analogue to digital converter 5 connected to the microprocessor 1 , which may be programmed to watch for pre-determined periods of lack of signal from the transducer 2, or for pre-determined periods of signal falling below a threshold value, or for a predetermined pattern of signals from the transducer. In each case, the operation of the monitoring may be switched off when the vehicle's speed is below a threshold value, and may be varied in response to the speed input at 4. When a condition is detected indicating the possibility of driver drowsiness or inattention, the microprocessor 1 may generate a warning signal on output line 6 to cause an audible alarm to sound and/or visible warnings to appear. If the condition is not rectified within a predetermined time period, the microprocessor may be programmed to generate one or more of: a signal on fuel line 7 to close a valve in the vehicle's fuel line; a signal on brake line 8 to cause gradual operation of the vehicle's braking system; and a signal on hazard line 9 to cause operation of the vehicle's external hazard warning lights to alert drivers of nearby vehicles to the potentially hazardous condition of the vehicle.

Claims

1. A road vehicle driver monitoring system, comprising: a steering system for the vehicle, the steering system having a power-assistance mechanism to assist in movement thereof; sensor means for generating an activity signal in response to operation of the power-assistance mechanism; and control means connected to the sensor means and arranged to generate a warning signal when the activity signal falls below a pre-determined level.
2. A system according to Claim 1 , wherein the control means is arranged to generate a warning signal in response to the absence of a signal for a pre-determined period of time.
3. A system according to Claim 1 or 2, wherein the control means is provided with a signal indicative of the vehicle's speed.
4. A system according to Claim 3, wherein the control means is arranged to prevent generation of the warning signal below a pre-determined speed.
5. A system according to any preceding claim, wherein the control means comprises a microprocessor.
6. A system according to Claim 5, wherein the microprocessor is programmed to monitor the activity signal and to determine the period of time when the signal is below a threshold value.
7. A system according to Claim 5, wherein the microprocessor is programmed to monitor the changes in activity signal with time and to compare the resulting pattern with a stored pattern representing a risk of driver drowsiness or inattention, generating a warning in response to detection of the pattern.
8. A system according to any preceding claim, wherein the power- assistance mechanism is hydraulic, and the sensor means comprises a pressure transducer.
9. A system according to any of Claims 1 to 7, wherein the power- assistance mechanism is electrically-powered, and the sensor means comprises an elec- trical current sensor.
10. A system according to any preceding claim, wherein the warning signal operates an audible warning device, a visible warning device, or a combination of the two.
11. A system according to Claim 0, wherein the warning signal is further used to trigger external warning lights to alert the drivers of adjacent vehicles.
12. A system according to Claim 10 or 11 , wherein the warning signal is used to operate means to interrupt the fuel supply to the vehicle's engine.
13. A system according to Claim 10, 1 1 or 12, wherein the warning signal is used to operate means to gradually apply the vehicle's brakes.
PCT/GB2001/004165 2000-09-19 2001-09-19 Road vehicle driver monitoring system WO2002025614A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001287885A AU2001287885A1 (en) 2000-09-19 2001-09-19 Road vehicle driver monitoring system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0022927A GB2356959B (en) 2000-03-08 2000-09-19 Incapacitated driver alarm and vehicle immobiliser
GB0022927.8 2000-09-19

Publications (1)

Publication Number Publication Date
WO2002025614A1 true WO2002025614A1 (en) 2002-03-28

Family

ID=9899705

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/004165 WO2002025614A1 (en) 2000-09-19 2001-09-19 Road vehicle driver monitoring system

Country Status (2)

Country Link
AU (1) AU2001287885A1 (en)
WO (1) WO2002025614A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2890632A1 (en) * 2005-09-14 2007-03-16 Koyo Steering Europ K S E Soc METHOD FOR DETECTING THE HOLDING OF A DRIVING WHEEL OF A POWER ASSISTED ELECTRONIC STEERING OF A MOTOR VEHICLE
WO2007031964A1 (en) * 2005-09-15 2007-03-22 Michael Adriaan Diedericks An aid for detecting drowsiness of a driver of a vehicle
WO2009010605A1 (en) * 2007-07-18 2009-01-22 Habermeyer Kratzer Axel Ricard Drowsiness alert system
CN107921869A (en) * 2016-02-05 2018-04-17 普瑞诺斯股份公司 Endless-track vehicle and its control method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678494A (en) 1971-02-25 1972-07-18 Dow Chemical Co Sleep sensing apparatus for use on automotive vehicles
US4017843A (en) 1975-02-07 1977-04-12 Nissan Motor Co., Ltd. Vehicle driver alertness apparatus monitoring steering wheel oscillations
US4509040A (en) 1981-12-01 1985-04-02 Nissan Motor Company, Limited Alarm system for preventing an automotive vehicle driver from dozing at the wheel
US5172785A (en) * 1990-06-19 1992-12-22 Nissan Motor Co., Ltd. Vehicle control system adjustable in accordance with driver's age and characteristic
JPH05116554A (en) * 1991-10-28 1993-05-14 Isuzu Motors Ltd Driver's dozing detection device
GB2356959A (en) * 2000-03-08 2001-06-06 John Brian Revell Incapacitated driver alarm and vehicle immobiliser

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678494A (en) 1971-02-25 1972-07-18 Dow Chemical Co Sleep sensing apparatus for use on automotive vehicles
US4017843A (en) 1975-02-07 1977-04-12 Nissan Motor Co., Ltd. Vehicle driver alertness apparatus monitoring steering wheel oscillations
US4509040A (en) 1981-12-01 1985-04-02 Nissan Motor Company, Limited Alarm system for preventing an automotive vehicle driver from dozing at the wheel
US5172785A (en) * 1990-06-19 1992-12-22 Nissan Motor Co., Ltd. Vehicle control system adjustable in accordance with driver's age and characteristic
JPH05116554A (en) * 1991-10-28 1993-05-14 Isuzu Motors Ltd Driver's dozing detection device
GB2356959A (en) * 2000-03-08 2001-06-06 John Brian Revell Incapacitated driver alarm and vehicle immobiliser

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 483 (M - 1472) 2 September 1993 (1993-09-02) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2890632A1 (en) * 2005-09-14 2007-03-16 Koyo Steering Europ K S E Soc METHOD FOR DETECTING THE HOLDING OF A DRIVING WHEEL OF A POWER ASSISTED ELECTRONIC STEERING OF A MOTOR VEHICLE
WO2007031619A1 (en) * 2005-09-14 2007-03-22 Jtekt Europe Method for detecting the grip on a steering wheel of a motor vehicle electrical power steering
WO2007031964A1 (en) * 2005-09-15 2007-03-22 Michael Adriaan Diedericks An aid for detecting drowsiness of a driver of a vehicle
WO2009010605A1 (en) * 2007-07-18 2009-01-22 Habermeyer Kratzer Axel Ricard Drowsiness alert system
CN107921869A (en) * 2016-02-05 2018-04-17 普瑞诺斯股份公司 Endless-track vehicle and its control method
CN107921869B (en) * 2016-02-05 2021-12-03 普瑞诺斯股份公司 Crawler vehicle and control method thereof

Also Published As

Publication number Publication date
AU2001287885A1 (en) 2002-04-02

Similar Documents

Publication Publication Date Title
US11518376B2 (en) Saddle-ride vehicle with autonomous braking and method of operating same
US6768962B2 (en) Method for sensing the readiness of a driver to steer
US8810412B2 (en) Device for waking up a driver and an operator
US7427924B2 (en) System and method for monitoring driver fatigue
US7696863B2 (en) Method and device for warning the driver of a motor vehicle
CN109606343B (en) Monitoring of vehicle brake pads
EP1829728A1 (en) Device for preventing accidents in the event of drowsiness or inattention on the part of the driver of a vehicle
SE534980C2 (en) Method of waking a sleepy motor vehicle driver
JPH01204865A (en) Device for automobile dynamically determining road-surface friction
US7061374B2 (en) Computer assisted danger alarm with emergency braking system
JP2005329907A (en) Wheel separation detecting device
JP2010191893A (en) Device and method for detecting driving failure state
WO2002025614A1 (en) Road vehicle driver monitoring system
EP2040235A1 (en) Apparatus for determining alertness of a driver steering a vehicle
US8396630B2 (en) System and method for monitoring driver fatigue
US20030210150A1 (en) Drive awake
JP2005204829A (en) Vehicle accident preventing method and accident preventing system
US20060125617A1 (en) Method and apparatus for anticipated brake light activation
JP2014024504A (en) Excess depression sensing system
JP5131581B2 (en) Braking force control device for vehicle
KR20000006884U (en) Dangerous driving warning device for vehicle
GB2356959A (en) Incapacitated driver alarm and vehicle immobiliser
KR20040098704A (en) Automatic control apparatus of automobile brake system
JPH0478622A (en) Asleep driving prevention device
JPH10166892A (en) Doze driving detector

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PH PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP