DIGITAL TORQUE SPANNER Russian patent published in 2014 - IPC G01L5/24 

FIELD: measurement equipment.

SUBSTANCE: invention relates to torque spanners for tightening of helical joints with calibrated torque and may be used in different industries of machine building. The digital torque spanner comprises a converter of an elastic element deformation, connected to an inlet of an amplifier, an analogue-digital converter with an inlet connected to an amplifier outlet, and by outlets - to the first inlets of the first and second digital comparators. The outlet of the first digital comparator is connected to an S-inlet of the first trigger, by the outlet connected to the first inlet of the "AND" element, and by an R-inlet is connected to an R-inlet of the second trigger. The outlet of the second digital comparator is connected to the S-inlet of the second trigger, by the inverse outlet connected to the second inlet of the "AND" element, by the outlet, via the first element of indication connected to the common power supply bus, the outlet of the second trigger via the second element of indication is also connected to the common power supply bus. At the same time the spanner is equipped with the third digital comparator, the third register of memory, a pulse counter, a memory unit, a delay element, an "OR" element, the second "AND" element, by the outlet via the third element of indication connected to the common power supply bus.

EFFECT: production of information on quality of tightening of helical joints made by an operator during the shift.

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