Resistance bridge and its use in conversion systems

Details Resistance bridge and its use in conversion systems Resistance bridge and its use in conversion systems

H - Electricity

03

H

H03H 7/00 (2006.01) G01B 7/00 (2006.01) H03K 3/02 (2006.01) H03K 5/00 (2006.01) H03M 1/06 (2006.01)

Patent

CA 2196712

An electrical network creates a differential voltage signal and comprises a plurality of first impedance elements of substantially equal values which are connected to form an impedance bridge. The impedance of at least one of the first impedance elements changes in response to at least one selected external condition to which the first impedance elements are exposed. The network also comprises a second impedance element which has two nodes. The second impedance element is connected at these nodes between a first pair of the first impedance elements. The differential voltages are measured between these nodes and between another node or nodes with magnitudes and signs being dependent upon the change in the impedance of the first impedance elements.

Un réseau électrique qui produit un signal de tension différentielle est constitué d'une pluralité de premières sources d'impédance ayant essentiellement la même valeur qui sont connectées de façon à former un pont d'impédance. L'impédance d'au moins une des premières sources d'impédance varie en réponse à au moins une condition extérieure sélectionnée à laquelle les premières sources d'impédance sont exposées. Le réseau comporte également une seconde source d'impédance ayant deux noeuds. La seconde source d'impédance est connectée à ces noeuds entre une première paire des premières sources d'impédance. Les tensions différentielles sont mesurées entre ces noeuds et entre un autre noeud ou d'autres noeuds, les grandeurs et les signes dépendant de la variation d'impédance des premières sources d'impédance.

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