3 results about "Automatic controller" patented technology

The present invention introduces method and device for automatically collecting bee venom. The biological characteristic of worker bee, which is low voltage and small current stimulated to stick and expel venom, is utilized in automatically collecting bee venom. The device for automatically collecting bee venom consists of AC or DC power source, automatic AC or DC controller, and bee venom collector. The device has simple control circuit structure, easy making, low cost and small size, and is especially suitable for collecting bee venom.

The invention discloses an RF (radio frequency)-SQUID (superconducting quantum interference device) application-based high-stability frequency automatic controller. The controller comprises a frequency tracking unit and a phase compensation unit; the frequency tracking unit is electrically connected with the phase compensation unit; the frequency tracking unit is used for capturing and tracking the resonant frequency of an LC circuit in an RF-SQUID application; and the phase compensation unit is used for compensating phase difference caused by different cable lengths in the RF-SQUID application. According to the RF (radio frequency)-SQUID (superconducting quantum interference device) application-based high-stability frequency automatic controller of the invention, automatic frequency control is used to replace conventional open-loop control, and the automatic frequency control has the characteristic of stable output frequency and is not affected by external environments; and the phasecompensation circuit is additionally adopted; and therefore, the high-stability frequency automatic controller has the advantages of wider application environment range and higher test precision. Theadvantages of the high-stability frequency automatic controller can be applied to geomagnetic exploration, physical principle verification, non-destructive detection, and low-frequency telecommunication and other fields.

The invention discloses an electromechanical automatic controller of a revolving door. The electromechanical automatic controller comprises a door spindle, the outer side of the door spindle is sleeved with a sleeve rotating around the door spindle, a plurality of horizontal fixing grooves with downward openings are fixed to the upper end of the sleeve in the circumferential direction of the sleeve, vertical fixing grooves with outward openings are formed in the lower portions of the horizontal fixing grooves, the vertical fixing groove is fixed to the outer wall of the sleeve, the outer end of the horizontal fixing groove is connected with an upper stop block, the lower portion of the upper stop block is connected with a lower stop block through a rope, the lower stop block is connected with a lower fixing groove with an upward opening, an outer roller is arranged at the bottom of the lower fixing groove, a plurality of inner rollers are evenly arranged on the edge of the bottom of the sleeve, and a driving mechanism for driving the sleeve to rotate is arranged at the top of the door spindle. According to the electromechanical automatic controller, the load bearing of the door spindle is shared, so that a door plate does not generate adhesive force to the door spindle when the revolving door rotates, and the aging speed is slowed down due to uniform force applied by the door plate during long-time use.