Semiconductor acceleration detecting apparatus and safety acceleration sensor for an air bag system
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorTeruaki Nagahara
Life of this patent
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Abstract
A semiconductor acceleration detecting apparatus having a cylinder fixed to a automobile, a piston having a predetermined mass, the piston being inserted in the cylinder and being slidable in an axial direction of the cylinder, a semiconductor pressure sensor disposed so as to face towards a closed space formed by an inner wall of the cylinder and an end wall of the piston, wherein the semiconductor pressure sensor converts pressure in the closed space to an electric potential difference, and an acceleration detecting apparatus including an amplifier and a comparator for detecting acceleration of the automobile in accordance with the electric potential difference outputted from the semiconductor pressure sensor.
Claims19
A semiconductor acceleration detecting apparatus comprising:
- a cylinder fixed to a movable body;
- a piston having a predetermined mass, said piston being inserted in said cylinder and being slidable in an axial direction of said cylinder;
- a semiconductor pressure detecting sensor disposed so as to face towards a closed space formed by an inner wall of said cylinder and an end wall of said piston, wherein said semiconductor pressure detecting sensor converts pressure in the closed space to an electrical signal and then outputs the electrical signal;
- and
- acceleration detecting means for detecting acceleration of said movable body in accordance with the electrical signal outputted from said semiconductor pressure detecting sensor.
A semiconductor acceleration detecting apparatus comprising:
- a cylinder fixed to a a first member of an automobile;
- a piston fixed to a second member of the automobile, wherein the first member moves relative to the second member when a collision of the automobile occurs, said piston inserted in said cylinder and slidable in an axial direction of said cylinder;
- a semiconductor pressure detecting sensor disposed so as to face towards a closed space formed by an inner wall of said cylinder and an end wall of said piston, wherein said semiconductor pressure detecting sensor converts pressure in the closed space to an electrical signal and then outputs the electrical signal;
- and
- acceleration detecting means for detecting acceleration of the first member relative to the second member in accordance with the electrical signal outputted from said semiconductor pressure detecting sensor.
A safety acceleration sensor for an air bag system of an automobile comprising:
- a cylinder fixed to the automobile;
- a piston having a predetermined mass, said piston being inserted in said cylinder and being slidable in an axial direction of said cylinder;
- a semiconductor pressure detecting sensor disposed so as to face towards a closed space formed by an inner wall of said cylinder and an end wall of said piston, wherein said semiconductor pressure detecting sensor converts pressure in the closed space to an electrical signal and then outputs the electrical signal;
- and
- acceleration detecting means for detecting acceleration of the automobile in accordance with the electrical signal outputted from said semiconductor pressure detecting sensor.
A semiconductor acceleration detecting apparatus comprising:
- a cylinder fixed to a movable body;
- a piston having a predetermined mass, said piston being inserted in said cylinder and being slidable in an axial direction of said cylinder;
- and
- a semiconductor pressure detecting sensor disposed so as to face towards a closed space formed by an inner wall of said cylinder and an end wall of said piston, wherein said semiconductor pressure detecting sensor converts pressure in the closed space to an electrical signal representative of acceleration and then outputs the electrical signal.
Dependencies are inferred from the claim text.