METHOD TO MONITOR POSITIONING OF FOLDS OF LOCK CHAMBER DOUBLE-LEAF GATE AND DEVICE FOR ITS REALISATION Russian patent published in 2012 - IPC E02B7/20 

FIELD: construction.

SUBSTANCE: method includes supply of a control signal to drives of displacement of each fold of a lock chamber gate and monitoring the position of each fold of the gate by means of two absolute angular encoders and one linear absolute encoder. On each fold of the gate a body of the first angle encoder is rigidly fixed on a gate fold edge, which is internal to the lock chamber. The body of the second angle encoder is rigidly fixed on the near wall of the lock chamber. Both angle encoders are installed in a single horizontal plane. Each fold is equipped with a pneumatic cylinder with a stem. On each fold of the gate the pneumatic cylinder body is rigidly linked to the shaft of the second angle encoder according to the rotation coordinate. The stem of the pneumatic cylinder is rigidly connected according to the coordinate of rotation with the shaft of the first angle encoder, and the linear absolute encoder is fixed on the pneumatic cylinder as capable of measuring the pneumatic cylinder stem travel. The device is equipped with a computing device, the inlets of which are connected by signal outlets of all encoders. Prior to the start of positioning monitoring the inner wall of each fold of the gate is installed in parallel to the appropriate wall of the lock chamber. For each fold of the gate in both absolute angle encoders the equal angle values are set, and in the absolute linear encoder the fixed value of the linear size is set. Data from all encoders is sent to the computing device, and there on the basis of this data a rectangular or a polar coordinate system is formed, where the position of any point in each fold is monitored, as the latter rotate. The angle position of internal walls of the gate relative to the walls of the lock chamber is identified using the difference in readings of rotation angles of shafts in absolute angle encoders, generated in the computing device. Linear coordinates are defined using linear displacement of the pneumatic cylinder stem by the signals into the computing device from the linear absolute encoder. The method is carried out with the help of the device, the design and location of which are described above.

EFFECT: higher accuracy of lock chamber gate folds during their displacement.