1. The injection system comprising: an injection device that can hold a syringe and to release the fluid from the syringe, when he holds the said injection device, the syringe barrel zone, wherein said injection device is able to hold the syringe so that the syringe barrel was coextensive with the cylinder area syringe, which has a length coinciding with the length of the syringe barrel when the device is injection holds a syringe and a longitudinal axis coinciding with the longitudinal axis of the syringe barrel when the device is injection holds the syringe, the injection device comprises a capacitive liquid detector, the electric field which penetrates into the cylinder area syringe in at least a first position and a second position along the longitudinal axis of the syringe barrel zone, wherein the first position is spaced from the second position to the first distance equal to at least half the length of the syringe barrel zone capacitive detector actions by the user, the electric whose field It penetrates into the syringe barrel in the zone of the first region which extends along the syringe barrel zone ilogicheskuyu circuit for determining effects on the part of the user, capable to determine the impact from the user at least partially based on the output of the capacitive detector from polzovatelya.2 effects. Injection system according to claim 1, in which the capacitive fluid detector comprises a first capacitor having a first electrode and a second elongate elektrod.3 extended. an injection system comprising: an injection device that can hold a syringe and to release liquid from the syringe when ez