Multiple point averaging duct temperature sensor

G - Physics – 01 – K

Patent

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Details

G01K 3/06 (2006.01)

Patent

CA 2451707

A multipoint temperature sensor (10) for measuring fluid temperature in a duct includes multiple thermistors (12) of equal resistance, spaced apart in a circuit. Each thermistor has a positive lead (32) and a negative lead (42) for connecting electrically with the circuit. Wires connect the thermistors such that half of the thermistors are placed in parallel with the other half of the thermistors. The total number of thermistors in the circuit is a perfect square. Shrinkwrap (56) fits over the thermistors (12) and the leads. Tabs (60) disposed on bridging clips (58) bend around the shrinkwrap and the wires on either side of each thermistor such that the tabs do not overlap the leads. All the wires between adjacent thermistors are contained in a single, plenum rated sheathing (30).

La présente invention concerne un capteur de température à points multiples (10) destiné à la mesure d'une température de fluide dans un conduit comportant plusieurs thermistors (12) d'égale résistance, espacés dans un circuit. Chaque thermistor comprend un fil de connexion positif (32) et un fil de connexion négatif (42) pour la connexion électrique avec le circuit. Des fils relient les thermistors de sorte que la moitié des thermistors sont disposés en parallèle avec l'autre moitié de thermistors. Le nombre total de thermistors dans le circuit constitue un carré parfait. Des films rétractables recouvrent les thermistors (12) et les fils de connexion. Des languettes (60) disposées sur des brides de raccordement (58) sont incurvées autour du film rétractable et des fils de part de d'autre de chaque thermistor de sorte que les languettes ne recouvrent pas les fils de connexion. Tous les fils entre des thermistors contigus sont contenus dans une gaine unique à revêtement nominal (30).

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