It is possible to assign different thicknesses to the twin stress points that have an influence on the calculation of the shear stress.

An input stress computation means (20) computes an input stress which is inputted into the subject device according to the relational expression and index data of the subject factor.

The strain computation part computes the change tendency of the displacement in the thickness direction of the arterial vessel wall at a time when the displacement within one cardiac cycle of the subject is maximized.

// this calculates the active end with no end constraint

// this calculates the active dur with an end constraint

This constraint complicates the algorithm for computing code lengths from symbol frequencies.

The device comprises: a multisensor (11m) sound pick-up device (8) forming an antenna (10); means for computing a first constraint; means for computing a second constraint.

Subsequently, a strain value identification unit identifies the strain value outputted from an axle load calculation strain gauge at the identified time.

It is possible to assign different thicknesses to the twin stress points that have an influence on the calculation of the shear stress.

Provided is a calculation device that executes a calculation while conforming to a real-time restriction.

A calculation is performed using the numeric value and a constraint is evaluated based on the result of the calculation.

The most important constraint is the Removal Constraint, it is a simple mathematical calculation that allows to evaluate the possibility of extracting the impressions.

The direction of action of the active load shall not be changed during the calculation

This change in resistance can be sensed and used to calculate the stress applied thereto.

If the conditions are not satisfied, a constraint value change unit 106 changes the second constraint value Uopt to repeat the calculation.