The invention relates to a quantitative feed
electric control pressure reductor, a characteristic test
system for the pressure reductor and an automatic test method. The quantitative feed
electric control pressure reductor comprises a quantitative air charging device and a quantitative air discharging device, and the quantitative air charging device and the quantitative air discharging device respectively control the movement of a valve core with an air charging
magnet coil and an air discharging
magnet coil in an
pulse mode to quantitatively charge or
discharge air to a control cavity, thereby the outlet pressure of the quantitative feed
electric control pressure reductor is regulated to a setting value; the quantitative feed electric control pressure reductor, a measured pressure reductor, a sensor device, a control valve, a
data acquisition and
control circuit and like are connected in series to form the characteristic test
system for the pressure reductor, the outlet pressure of the quantitative feed electric control pressure reductor is used as the
inlet pressure of the measured pressure reductor, the sensor and a collection card are used as a
data acquisition device, the automatic performance of the characteristic test of the measured pressure reductor is realized by computer
process control, and the
test data is displayed and recorded in real time.