An apparatus for measuring internal pressure and method therefor

摘要

The internal pressure of a resilient-walled vessel such as a car tire is measured in accordance with a relationship between the internal pressure and representative parameter associated with vibrations submitted to the tire and response vibrations induced in the tire. The vibrations can be submitted to a wall of the vessel either by mechanical means or by piezo-electric means. The response vibrations are sensed and converted into electrical signals. The representative parameter is converted into pressure with the aim of previously established reference curve for the same vessel expressing dependence of the internal pressure on the representative parameter.