The invention discloses a dissolved
oxygen detection device based on a micro-fluidic
chip, which comprises a
control circuit, a detection circuit and a micro-fluidic
chip sensor; the center of the micro-fluidic
chip sensor is provided with a closed detection cavity formed by an upper layer and a lower layer, and an
oxygen permeation membrane is arranged between the upper layer and the lower layer;a to-be-detected solution inlet
pipe and a to-be-detected solution outlet
pipe are symmetrically arranged on the side edge of the upper-layer cavity, a
microelectrode is arranged in the lower-layer cavity, an
electrolyte inlet
pipe and an
electrolyte outlet pipe are symmetrically arranged on the side edge of the cavity, the
microelectrode is connected with a detection circuit for detecting current, and a current
signal is fed back to the
control circuit. and the concentration of
oxygen in the solution is calculated. According to the device, the concentration of dissolved oxygen is detected ina flowing state of a solution to be detected, so that the operation of continuously stirring in a traditional device is avoided; after detection is finished, automatic cleaning is conducted, the
electrolyte is automatically replaced at regular intervals, the detection precision is improved, and wide application prospects are achieved.