Method and device for detecting the drowsiness state of drivers of moving objects

• US 20050024212A1
• Filed: 12/12/2002
• Published: 02/03/2005
• Est. Priority Date: 12/12/2001
• Status: Abandoned Application

• Current Assignee: Deutsche Telekom AG
• Original Assignee: Deutsche Telekom AG
• Inventors: Hultzsch, Hagen
• Application Number:
  US10/498,659
• Publication Number:
  US 20050024212A1
• Time in Patent Office: Days
• US Class Current: 340/575
• CPC Class Codes: A61B 5/18 for vehicle drivers or machine operators
• CPC Class Codes: B60K 28/066 actuating a signalling device B60K28/063 takes precedence
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B60L 3/02 Dead-man's devices
• CPC Class Codes: B60W 2050/0025 Transfer function weighting factor
• CPC Class Codes: G08B 21/06 indicating a condition of sleep, e.g. anti-dozing alarms

Abstract

The invention relates to a method and a device for monitoring the drowsiness of drivers of moving objects, such as vehicles, aeroplanes, trains, and ships. According to said method, several physiological measurement variables such as e.g. blinking frequency, eyelid pulse frequency, yawning frequency or the state of face muscle relaxation are combined into a summation signal with a differentiated weighting, said signal constituting a final state signal, which indicates the drowsiness with the logic states 0 (zero/e.g. no drowsiness established) or 1 (one/e.g. drowsiness established).

Claims

1-29. -29. (Canceled).

30. A method for monitoring a drowsiness state of operators of moving objects, such as vehicles, airplanes, trains, and ships, comprising:

combining a plurality of physiological measured variables, including at least eyelid blinking frequency and eyelid pulse-duty ratio, to form a differently weighted composite signal, which, by states of logic 0 or logic 1, then indicates the drowsiness state as an end-status signal.

37. The method as recited in claim 30, wherein, as a further physiological measured variable, a state of relaxation enters into the composite signal.

42. The method as recited in claim 30, wherein, as a wake-up signal, the end-status signal triggers at least one of an acoustic alarm, an optical alarm, and a vibrational alarm.

43. The method as recited in claim 30, wherein the end-status signal acts on locomotive characteristics of the moving object, it being possible to carry out measures such as uncoupling, switching off an engine and/or gentle braking.

44. The method as recited in claim 30, wherein, in trains, the end-status signal can be directly used to release a dead-man brake.

59. The method as recited in claim 30, wherein logic 0 indicates no drowsiness ascertained and logic 1 indicates drowsiness ascertained.

60. The method as recited in claim 30, wherein, as a further physiological measured variable, a yawning frequency enters into the composite signal.

69. The method as recited in claim 37, wherein a suitable combination of a plurality of physiological measured variables constitutes an independent measuring signal.

71. The method as recited in claim 60, wherein a suitable combination of a plurality of physiological measured variables constitutes an independent measuring signal.

31. A method for monitoring a drowsiness state of operators of moving objects, such as vehicles, airplanes, trains, and ships, comprising:

combining a plurality of physiological measured variables, including at least eyelid blinking frequency and yawning frequency, to form a differently weighted composite signal, which, by states of logic 0 or logic 1, then indicates the drowsiness state as an end-status signal.

39. The method as recited in claim 31, wherein, as a further physiological measured variable, eyelid pulse-duty ratio enters into the composite signal.

62. The method as recited in claim 31, wherein, as a further physiological measured variable, a state of facial-muscle relaxation enters into the composite signal.

73. The method as recited in claim 62, wherein a suitable combination of a plurality of physiological measured variables constitutes an independent measuring signal.

79. The method as recited in claim 31, wherein, as a wake-up signal, the end-status signal triggers at least one of an acoustic alarm, an optical alarm, and a vibrational alarm.

84. The method as recited in claim 31, wherein the end-status signal acts on locomotive characteristics of the moving object, it being possible to carry out measures such as uncoupling, switching off an engine and/or gentle braking.

89. The method as recited in claim 31, wherein, in trains, the end-status signal can be directly used to release a dead-man brake of the moving object.

112. The method as recited in claim 31, wherein logic 0 indicates no drowsiness ascertained and logic 1 indicates drowsiness ascertained.

32. A method for monitoring a drowsiness state of operators of moving objects, such as vehicles, airplanes, trains, and ships, comprising:

combining a plurality of physiological measured variables, including at least an eyelid blinking frequency and a state of facial-muscle relaxation, to form a differently weighted composite signal, which, by states of logic 0 or logic 1, then indicates the drowsiness state as an end-status signal.

36. The method as recited in claim 32, wherein, as a further physiological measured variable, a yawning frequency enters into the composite signal.

40. The method as recited in claim 36, wherein, as a further physiological measured variable, eyelid pulse-duty ratio enters into the composite signal.

41. The method as recited in claim 40, wherein a suitable combination of a plurality of physiological measured variables constitutes an independent measuring signal.

66. The method as recited in claim 32, wherein, as a further physiological measured variable, eyelid pulse-duty ratio enters into the composite signal.

68. The method as recited claim 36, wherein a suitable combination of a plurality of physiological measured variables constitutes an independent measuring signal.

77. The method as recited in claim 66, wherein a suitable combination of a plurality of physiological measured variables constitutes an independent measuring signal.

80. The method as recited in claim 32, wherein, as a wake-up signal, the end-status signal triggers at least one of an acoustic alarm, an optical alarm, and a vibrational alarm.

85. The method as recited in claim 32, wherein the end-status signal acts on locomotive characteristics of the moving object, it being possible to carry out measures such as uncoupling, switching off an engine and/or gentle braking.

90. The method as recited in claim 32, wherein, in trains, the end-status signal can be directly used to release a dead-man brake.

113. The method as recited in claim 32, wherein logic 0 indicates no drowsiness ascertained and logic 1 indicates drowsiness ascertained.

33. A method for monitoring the drowsiness state of operators of moving objects, such as vehicles, airplanes, trains, and ships, comprising:

combining a plurality of physiological measured variables, including at least eyelid pulse-duty ratio and yawning frequency, to form a differently weighted composite signal, which, by states of logic 0 or logic 1, then indicates the drowsiness state as an end-status signal.

38. The method as recited in claim 33, wherein, as a further physiological measured variable, eyelid frequency enters into the composite signal.

63. The method as recited in claim 33, wherein, as a further physiological measured variable, a state of facial-muscle relaxation enters into the composite signal.

70. The method as recited in claim 38, wherein a suitable combination of a plurality of physiological measured variables constitutes an independent measuring signal.

74. The method as recited in claim 63, wherein a suitable combination of a plurality of physiological measured variables constitutes an independent measuring signal.

81. The method as recited in claim 33, wherein, as a wake-up signal, the end-status signal triggers at least one of an acoustic alarm, an optical alarm, and a vibrational alarm.

86. The method as recited in claim 33, wherein the end-status signal acts on locomotive characteristics of the moving object, it being possible to carry out measures such as uncoupling, switching off an engine and/or gentle braking.

91. The method as recited in claim 33, wherein, in trains, the end-status signal can be directly used to release a dead-man brake.

114. The method as recited in claim 33, wherein logic 0 indicates no drowsiness ascertained and logic 1 indicates drowsiness ascertained.

34. A method for monitoring the drowsiness state of operators of moving objects, such as vehicles, airplanes, trains, and ships, comprising:

combining a plurality of physiological measured variables, including at least eyelid pulse-duty ratio and state of facial-muscle relaxation, to form a differently weighted composite signal, which, by states of logic 0 or logic 1, then indicates the drowsiness state as an end-status signal.

61. The method as recited in claim 34, wherein, as a further physiological measured variable, a yawning frequency enters into the composite signal.

64. The method as recited in claim 34, wherein, as a further physiological measured variable, eyelid frequency enters into the composite signal.

72. The method as recited in claim 61, wherein a suitable combination of a plurality of physiological measured variables constitutes an independent measuring signal.

75. The method as recited in claim 64, wherein a suitable combination of a plurality of physiological measured variables constitutes an independent measuring signal.

82. The method as recited in claim 34, wherein, as a wake-up signal, the end-status signal triggers at least one of an acoustic alarm, an optical alarm, and a vibrational alarm.

87. The method as recited in claim 34, wherein the end-status signal acts on locomotive characteristics of the moving object, it being possible to carry out measures such as uncoupling, switching off an engine and/or gentle braking.

92. The method as recited in claim 34, wherein, in trains, the end-status signal can be directly used to release a dead-man brake.

115. The method as recited in claim 34, wherein logic 0 indicates no drowsiness ascertained and logic 1 indicates drowsiness ascertained.

35. A method for monitoring the drowsiness state of operators of moving objects, such as vehicles, airplanes, trains, and ships, comprising:

combining a plurality of physiological measured variables, including at least yawning frequency and state of facial-muscle relaxation, to form a differently weighted composite signal, which, by states of logic 0 or logic 1, then indicates the drowsiness state as an end-status signal.

65. The method as recited in claim 35, wherein, as a further physiological measured variable, eyelid frequency enters into the composite signal.

67. The method as recited in claim 35, wherein, as a further physiological measured variable, eyelid pulse-duty ratio enters into the composite signal.

76. The method as recited in claim 65, wherein a suitable combination of a plurality of physiological measured variables constitutes an independent measuring signal.

78. The method as recited in claim 67, wherein a suitable combination of a plurality of physiological measured variables constitutes an independent measuring signal.

83. The method as recited in claim 35, wherein, as a wake-up signal, the end-status signal triggers at least one of an acoustic alarm, an optical alarm, and a vibrational alarm.

88. The method as recited in claim 35, wherein the end-status signal acts on locomotive characteristics of the moving object, it being possible to carry out measures such as uncoupling, switching off an engine and/or gentle braking.

93. The method as recited in claim 35, wherein, in trains, the end-status signal can be directly used to release a dead-man brake.

116. The method as recited in claim 35, wherein logic 0 indicates no drowsiness ascertained and logic 1 indicates drowsiness ascertained.

45. A device for monitoring the drowsiness state of operators of moving objects, such as vehicles, airplanes, trains, and ships, comprising:

a differently weighted composite signal being formed by combining a plurality of physiological measured variables, including at least eyelid blinking frequency and eyelid pulse-duty ratio, which, by states of logic 0 and/or logic 1 then indicates the drowsiness state as end-status signal.

52. The device as recited in claim 45, wherein, as a further physiological measured variable, a state of facial-muscle relaxation enters into the composite signal.

56. The device as recited in claim 45, wherein, as a wake-up signal, the end-status signal triggers at least one of an acoustic alarm, an optical alarm, and a vibrational alarm.

57. The device as recited in one of claims 45 through 55, wherein the end-status signal acts on the locomotive characteristics of the moving object, it being possible to carry out measures such as uncoupling, switching off the engine and/or gentle braking.

58. The device as recited in claim 45, wherein, in trains, the end-status signal can be directly used to release a dead-man brake.

94. The device as recited in claim 45, wherein, as a further physiological measured variable, a yawning frequency enters into the composite signal.

117. The method as recited in claim 45, wherein logic 0 indicates no drowsiness ascertained and logic 1 indicates drowsiness ascertained.

46. A device for monitoring the drowsiness state of operators of moving objects, such as vehicles, airplanes, trains, and ships, comprising:

a differently weighted composite signal being formed by combining a plurality of physiological measured variables, including at least eyelid blinking frequency and the yawning frequency, which, by states of logic 0 and/or logic 1 then indicates the drowsiness state as end-status signal.

54. The device as recited in claim 46, wherein, as a further physiological measured variable, eyelid pulse-duty ratio enters into the composite signal.

96. The device as recited in claim 46, wherein, as a further physiological measured variable, a state of facial-muscle relaxation enters into the composite signal.

102. The device as recited in claim 46, wherein, as a wake-up signal, the end-status signal triggers at least one of an acoustic alarm, an optical alarm, and a vibrational alarm.

107. The device as recited in claim 46, wherein, in trains, the end-status signal can be directly used to release a dead-man brake.

118. The method as recited in claim 46, wherein logic 0 indicates no drowsiness ascertained and logic 1 indicates drowsiness ascertained.

47. A device for monitoring the drowsiness state of operators of moving objects, such as vehicles, airplanes, trains, and ships, comprising:

a differently weighted composite signal being formed by combining a plurality of physiological measured variables, including at least eyelid blinking frequency and the state of facial-muscle relaxation, which, by states of logic 0 and/or logic 1 then indicates the drowsiness state as end-status signal.

51. The device as recited in claim 47, wherein, as a further physiological measured variable, a yawning frequency enters into the composite signal.

55. The device as recited in claim 51, wherein, as a further physiological measured variable, eyelid pulse-duty ratio enters into the composite signal.

100. The device as recited in claim 47, wherein, as a further physiological measured variable, eyelid pulse-duty ratio enters into the composite signal.

103. The device as recited in claim 47, wherein, as a wake-up signal, the end-status signal triggers at least one of an acoustic alarm, an optical alarm, and a vibrational alarm.

108. The device as recited in claim 47, wherein, in trains, the end-status signal can be directly used to release a dead-man brake.

119. The method as recited in claim 47, wherein logic 0 indicates no drowsiness ascertained and logic 1 indicates drowsiness ascertained.

48. A device for monitoring the drowsiness state of operators of moving objects, such as vehicles, airplanes, trains, and ships, comprising:

a differently weighted composite signal being formed by combining a plurality of physiological measured variables, including at least eyelid pulse-duty ratio and the yawning frequency, which, by states of logic 0 and/or logic 1 then indicates the drowsiness state as end-status signal.

53. The device as recited in claim 48, wherein, as a further physiological measured variable, eyelid frequency enters into the composite signal.

97. The device as recited in claim 48, wherein, as a further physiological measured variable, a state of facial-muscle relaxation enters into the composite signal.

104. The device as recited in claim 48, wherein, as a wake-up signal, the end-status signal triggers at least one of an acoustic alarm, an optical alarm, and a vibrational alarm.

109. The device as recited in claim 48, wherein, in trains, the end-status signal can be directly used to release a dead-man brake.

120. The method as recited in claim 48, wherein logic 0 indicates no drowsiness ascertained and logic I indicates drowsiness ascertained.

49. A device for monitoring the drowsiness state of operators of moving objects, such as vehicles, airplanes, trains, and ships, comprising:

a differently weighted composite signal being formed by combining a plurality of physiological measured variables, including at least eyelid pulse-duty ratio and state of facial-muscle relaxation, which, by states of logic 0 and/or logic 1 then indicates the drowsiness state as end-status signal.

95. The device as recited in claim 49, wherein, as a further physiological measured variable, a yawning frequency enters into the composite signal.

98. The device as recited in claim 49, wherein, as a further physiological measured variable, eyelid frequency enters into the composite signal.

105. The device as recited in claim 49, wherein, as a wake-up signal, the end-status signal triggers at least one of an acoustic alarm, an optical alarm, and a vibrational alarm.

110. The device as recited in claim 49, wherein, in trains, the end-status signal can be directly used to release a dead-man brake.

121. The method as recited in claim 49, wherein logic 0 indicates no drowsiness ascertained and logic I indicates drowsiness ascertained.

50. A device for monitoring the drowsiness state of operators of moving objects, such as vehicles, airplanes, trains, and ships, comprising:

a differently weighted composite signal being formed by combining a plurality of physiological measured variables, including at least yawning frequency and the state of facial-muscle relaxation, which, by states of logic 0 and/or logic 1 then indicates the drowsiness state as end-status signal.

99. The device as recited in claim 50, wherein, as a further physiological measured variable, eyelid frequency enters into the composite signal.

101. The device as recited in claim 50, wherein, as a further physiological measured variable, eyelid pulse-duty ratio enters into the composite signal.

106. The device as recited in claim 50, wherein, as a wake-up signal, the end-status signal triggers at least one of an acoustic alarm, an optical alarm, and a vibrational alarm.

111. The device as recited in claim 50, wherein, in trains, the end-status signal can be directly used to release a dead-man brake.

122. The method as recited in claim 50, wherein logic 0 indicates no drowsiness ascertained and logic I indicates drowsiness ascertained.