Device for testing internal pressure of a gas reservoir of an airbag inflator
First Claim
1. A device for testing the internal pressure of a gas reservoir comprising:
- an oscillation transmitter placed on an exterior surface of the gas reservoir;
an oscillation sensor placed on the exterior surface of the gas reservoir;
a temperature-measuring device placed on the exterior surface of the gas reservoir; and
evaluation electronics comprising a comparator connected to the oscillation sensor and a set value transmitter that indicates the resonance frequency measured under a set internal pressure, whereby the comparator compares the resonance frequency measured by the oscillation sensor with the resonance frequency indicated by the set value transmitter, the oscillation transmitter, the oscillation sensor, and the temperature-measuring device are integrated in one unit such that the generation and frequency measuring of the oscillations are carried out at locations on the exterior surface of the gas reservoir that are distanced from one another with respect to a longitudinal axis of the gas reservoir, wherein the unit is oscillation-decoupled by the oscillation transmitter and the oscillation sensor.
14 Assignments
0 Petitions
Accused Products
Abstract
A device for testing the inflation state of an cold gas inflator for an airbag has a gas reservoir that is filled with gas at a high pressure, in particular an inert gas. Oscillations of frequencies varying within a particular frequency range are generated at an exterior surface the filled gas reservoir by an oscillation transmitter and the resonance frequency is measured using an oscillation sensor. A comparator compares the measured resonance frequency with a resonance frequency that was determined at the gas reservoir filled with the volume of gas. The oscillation transmitter and the oscillation sensor are integrated in a unit such that the generation and frequency measuring of the oscillations are carried out at locations on the exterior surface of the gas reservoir that are distanced from one another with respect to a longitudinal axis of the gas reservoir.
-
Citations
3 Claims
-
1. A device for testing the internal pressure of a gas reservoir comprising:
-
an oscillation transmitter placed on an exterior surface of the gas reservoir;
an oscillation sensor placed on the exterior surface of the gas reservoir;
a temperature-measuring device placed on the exterior surface of the gas reservoir; and
evaluation electronics comprising a comparator connected to the oscillation sensor and a set value transmitter that indicates the resonance frequency measured under a set internal pressure, whereby the comparator compares the resonance frequency measured by the oscillation sensor with the resonance frequency indicated by the set value transmitter, the oscillation transmitter, the oscillation sensor, and the temperature-measuring device are integrated in one unit such that the generation and frequency measuring of the oscillations are carried out at locations on the exterior surface of the gas reservoir that are distanced from one another with respect to a longitudinal axis of the gas reservoir, wherein the unit is oscillation-decoupled by the oscillation transmitter and the oscillation sensor. - View Dependent Claims (2, 3)
-
Specification
-
- Resources
-
Current AssigneeKey Safety Systems, Inc. (Ningbo Junsheng Investment Group Co., Ltd.)
-
Original AssigneeBreed Automotive Technology, Inc. (Ningbo Junsheng Investment Group Co., Ltd.)
-
InventorsWeber, Dieter, Wiesbaum, Stefan
-
Primary Examiner(s)OEN, WILLIAM L
-
Application NumberUS10/134,389Publication NumberTime in Patent Office357 DaysField of Search73/493, 73/492, 73/52, 737/02, 737/06, 737/49, 737/59, 280/728.R, 280/735, 280/736, 280/737, 280/741US Class Current73/702CPC Class CodesG01L 11/04 by acoustic meansG01L 11/06 Ultrasonic meansG01M 3/24 using infrasonic, sonic, or...
