Magnetic sensor
First Claim
1. A magnetic sensor, comprising:
- a. at least one first coil at an associated at least one first location of a body of a vehicle, wherein said at least one first coil is operatively coupled to a ferromagnetic element of said vehicle body;
b. at least one magnetic sensing element operatively connected to at least one second location of said body of said vehicle, wherein said at least one first and at least one second locations are in magnetic communication through a first portion of said vehicle and through a second portion of said vehicle, said first portion of said vehicle comprises a portion of said body that is susceptible to deformation by a crash, said first portion is distinct from said second portion, and at least one of said at least one first coil and said at least one magnetic sensing element comprising a second coil of an electromagnetic device selected from a motor, a solenoid, a window control motor, a seat control motor, a mirror control motor, and a door lock solenoid;
c. at least one first signal operatively connected to said at least one first coil;
d. a means for sensing at least one second signal from said at least one magnetic sensing element; and
e. a means for discriminating a crash from said at least one second signal.
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Abstract
A magnetic sensor, comprises at least one first coil at an associated at least one first location of a body of a vehicle and at least one magnetic sensing element operatively connected to at least one second location of the body of the vehicle. The at least one first coil is operatively coupled to a ferromagnetic element of a vehicle body, the at least one first and at least one second locations are in magnetic communication through a first portion of the vehicle and through a second portion of the vehicle, the first portion of the vehicle comprises a portion of the body that is susceptible to deformation by a crash, the first portion is distinct from the second portion, and at least one of the at least one first coil and the at least one magnetic sensing element comprises a coil of an electromagnetic device selected from a motor, a solenoid, a window control motor, a seat control motor, a mirror control motor, and a door lock solenoid. At least one first signal is operatively connected to the at least one first coil, and at least one second signal is sensed from the at least one second coil, and a vehicle crash is discriminated form the at least one second signal.
70 Citations
37 Claims
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1. A magnetic sensor, comprising:
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a. at least one first coil at an associated at least one first location of a body of a vehicle, wherein said at least one first coil is operatively coupled to a ferromagnetic element of said vehicle body;
b. at least one magnetic sensing element operatively connected to at least one second location of said body of said vehicle, wherein said at least one first and at least one second locations are in magnetic communication through a first portion of said vehicle and through a second portion of said vehicle, said first portion of said vehicle comprises a portion of said body that is susceptible to deformation by a crash, said first portion is distinct from said second portion, and at least one of said at least one first coil and said at least one magnetic sensing element comprising a second coil of an electromagnetic device selected from a motor, a solenoid, a window control motor, a seat control motor, a mirror control motor, and a door lock solenoid;
c. at least one first signal operatively connected to said at least one first coil;
d. a means for sensing at least one second signal from said at least one magnetic sensing element; and
e. a means for discriminating a crash from said at least one second signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of sensing a vehicle crash, comprising:
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a. generating a first magnetic flux at a first location of a vehicle in a ferromagnetic element of a vehicle body, wherein said first magnetic flux is responsive to a crash of said vehicle;
b. conducting sad first magnetic flux between said first location and a second location of said vehicle along a first path, wherein said first path is through a body part of said vehicle;
c. conducting said first magnetic flux between said first location and said second location along a second path, wherein said first and second paths form a closed path, and a magnetic reluctance along at least one of said first path and said second path is responsive to said vehicle crash;
d. sensing a second magnetic flux at said second location, said second magnetic flux being responsive to said first magnetic flux, wherein at least one of the operations of generating a first magnetic flux and sensing said second magnetic flux is with an electromagnetic device selected from a motor, a solenoid, a window control motor, a seat control motor, a mirror control motor, and a door lock solenoid;
e. generating a first signal responsive to said second magnetic flux sensed at said second location, and f. discriminating said vehicle crash responsive to said first signal. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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30. A method of sensing a vehicle crash, comprising:
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a. generating a first magnetic flux at a first location of a vehicle in a ferromagnetic element of a vehicle body, wherein said first magnetic flux is responsive to a crash of said vehicle, said first magnetic flux is generated with at least one first coil, said first location comprises a plurality of distinct first locations and said first magnetic flux is generated with a plurality of first said coils;
b. conducting said first magnetic flux between said first location and a second location of said vehicle along a first path, wherein said first path is through a body part of said vehicle;
c. conducting said first magnetic flux between said first location and said second location along a second path, wherein said first and second paths form a closed path, and a magnetic reluctance along at least one of said first path and said second path is responsive to said vehicle crash;
d. sensing a second magnetic flux at said second location, said second magnetic flux being responsive to said first magnetic flux, wherein at least one of the operations of generating a first magnetic flux and sensing said second magnetic flux is with an electromagnetic device selected from a motor, a solenoid, a window control motor, a seat control motor, a mirror control motor, and a door lock solenoid;
e. generating a signal responsive to said second magnetic flux sensed at said second location;
f. discriminating said vehicle crash responsive to said signal;
g. determining a measure of power applied to said at least one first coil and determining a proximity of an object to said vehicle body from said measure of power; and
h. determining a plurality of measures of power applied to a respective plurality of said plurality of first coils and estimating a direction of said proximate object from said plurality of measures of power.
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31. A method of sensing a vehicle crash, comprising:
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a. generating a first magnetic flux at a first location of a vehicle in a ferromagnetic element of a vehicle body, wherein said fist magnetic flux is responsive to a crash of said vehicle;
b. conducting said first magnetic flux between said first location and a second location of said vehicle along a first path, wherein said first path is through a body part of said vehicle;
c. conducting sad first magnetic flux between said first location and said second location along a second path, wherein said first and second paths form a closed path, and a magnetic reluctance along at least one of said first path and said second path is responsive to said vehicle crash;
d. sensing a second magnetic flux at said second location, said second a magnetic flux being responsive to said first magnetic flux, wherein at least one of the operations of generating a first magnetic flux and sensing said second magnetic flux is with an electromagnetic device selected from a motor, a solenoid, a window control motor, a seat control motor, a mirror control motor, and a door lock solenoid;
e. generating a first signal responsive to said second magnetic flux sensed at said second location;
f. discriminating said vehicle crash responsive to said first signal; and
g, synchrononously demodulating said first signal so as to form a second signal, DC coupling said second signal so as to form a DC coupled second signal, and extracting a first component of said first signal from said DC coupled second signal. - View Dependent Claims (32, 33, 34, 35)
a. comparing a rate of change of said second component of said first signal with a first threshold;
b. comparing a magnitude of said first component of said first signal with a second threshold;
c. comparing a rate of change of said first component of said first signal with a third threshold; and
d. deploying a safety restraint system if a first condition is met and then a second condition is met, wherein said first condition is met if said rate of change of said second component of said first signal exceeds said first threshold and said second condition is met if said magnitude of said first component of said first signal exceeds said second threshold and said rate of change of said first component and said first signal exceeds said third threshold.
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36. A method of sensing a vehicle crash, comprising:
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a. generating a first magnetic flux at a first location of a vehicle in a ferromagnetic element of a vehicle body, wherein said first magnetic flux is responsive to a crash of said vehicle;
b. conducting said first magnetic flux between said first location and a second location of said vehicle along a first path, wherein said first path is through a body part of said vehicle;
c. conducting said first magnetic flux between said first location and said second location along a second path, wherein said first and second paths form a closed path, and a magnetic reluctance along at least one of said first path and said second path is responsive to said vehicle crash;
d. sensing a second magnetic flux at said second location, said second magnetic flux being responsive to said first magnetic flux, wherein at least one of the operations of generating a first magnetic flux and sensing said second magnetic flux is with an electromagnetic device selected from a motor, a solenoid, a window control motor, a seat control motor, a mirror control motor, and a door lock solenoid;
e. generating a first signal responsive to said second magnetic flux sensed at said second location;
f. discriminating said vehicle crash responsive to said first signal; and
g. synchronously demodulating said first signal so as to form a second signal, AC coupling and amplifying said second signal so as to form an AC coupled second signal and extracting a second component of said first signal from said AC coupled second signal. - View Dependent Claims (37)
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Specification