2 results about "Pulse number" patented technology

An automatic spot drill motor speed control method includes following steps: 1), acquiring acceleration planning charts (a1, a2,..., an); 2), setting acceleration period of each time of acceleration as delta tn which refers to time for which current speed needs to be maintained to run for delta tn before nth acceleration, and combining speed planning charts (v1, v2, ..., vn) of a motor acquired inthe step 1) by calculation and pulse planning charts (l1, l2, ..., ln) of pulse number needed for reaching target speed, wherein delta tn is in direct proportion to the current speed of a spot drillstepping motor, and minimum acceleration period is delta t; 3),calculating according to the target position and the current position of the spot drill motor to acquire stroke L, combining vp and L, and comparing values in the speed planning charts and the pulse planning charts of the step 2) to acquire a speed control curve meeting the speed planning charts and the pulse planning charts, wherein the target speed is vp. By the method, quick acceleration of the spot drill stepping motor can be realized, and working stability and efficiency of the spot drill motor can be improved.

The invention discloses a multi-row rope measuring device and method. The device comprises a pulse sensor and a controller, the pulse sensor is used for detecting the pulse number in the rotating lifting or lowering process of a winding drum; the controller is connected with a display, the display displays an actual sounding value, and when an outer-layer rope is just put down to an intersection of an inner-row rope, a sounding value at the moment, namely the rope length, is recorded and written into a memory of the controller through the display to participate in subsequent sounding calculation; and the controller is connected with a pulse sensor, receives the pulse number sent by the pulse sensor, and calculates a sounding value based on the pulse number and a preset calculation strategy. The measuring device is simple in structure, can reduce cost, can accurately measure the drilling depth and improve the construction efficiency.