Error-free counting method for rotator revolutions of orthogonally distributed dual sensor

Abstract

The invention discloses an error-free counting method for the rotator revolutions of an orthogonally distributed dual sensor, which is characterized of comprising a whirling object (1), an initiator (2), two sensors (3) and a judgment recording method. The method adopts the technical scheme that the two sensors are orthogonally arranged near the initiator which whirls with the whirling object, and when the initiator passes through the two orthogonally arranged sensors in a whirling way, a computer judges the corresponding relationships between an ascending edge and a declining edge and between high electrical level and low electrical level of a pulse signal wave form which is simultaneously outputted by the two orthogonally arranged sensors and has phase difference, so as to overcome the problem and the defect that a feedback signal of whirling direction can not be simultaneously provided in the prior art, and achieve the aim of error-free counting to the rotator revolutions by recording the judgment that the pulse signal simultaneously absolutely outputted by the two orthogonally arranged sensors has characteristics corresponding to the whirling direction and the availability of the initiator.

Description

technical field [0001] The invention relates to a counting of the number of revolutions of a rotating object, in particular to a rotating body with two orthogonal distribution sensors that realizes error-free counting of the number of revolutions of a rotating object by collecting data from two orthogonally distributed sensors The number of revolutions is an error-free counting method. Background technique [0002] The engineering significance of counting the number of rotations of a rotating object is to determine the position of a moving object driven by rotation. For example, a rotating screw drives a nut to move in a straight line. Pitch, to obtain the displacement distance of the nut; for any object that rotates in both positive and negative directions, to record the number of rotations, the "algebraic sum" method is often used in engineering, that is, the number of clockwise positive rotations is The number of positive turns, the number of turns counterclockwise and r...

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Problems solved by technology

[0004] As mentioned above, the prior art method of recording and counting by a single sensor is only suitable for an open-loop control system that commands a given direction and does not require feedback of the rotation direction, and is not suitable for a closed-loop control system that must have feedback of the rotation direction; for example, when the system is blocked When the rotation jitters, especially when the jitter occurs at the N-pole and S-pole exchange of the magnetic field of the magnet, the jittery magnetic field causes the Hall sensor to induce numerous output pulse signals, and the computer cannot identify the "rotation" and "rotation" of these pulse signals. Effectiveness", as usual, according to the direction given by the instruction, the cumulative record of positive or negative turns will be made, and the calculation result of the "algebraic sum" will inevitably be wrong, resulting in a serious discrepancy between the count value and the actual number of turns. In application engineering, it means that there is a deviation between the counting and the actual position of the moving object driven by rotation. This deviation is not allowed when there is a strict corresponding requirement for the number of rotations and position coordinates

Similarly, a single group of photoelectric sensors also has a similar situation. When the edge of the shading plate is near the photosensor, once the rotation shakes, it will also send out a lot of output pulse signals because the shading plate covers the light for a while and passes through the light for a while, resulting in multiple counts, Miscounting errors; therefore, the existing counting methods cannot be applied to systems that have strict requirements on the number of rotations and position coordinates and are easily blocked and cause rotation jitter, or in closed-loop control systems that must provide rotation feedback; therefore, There are problems and deficiencies in the existing technology that the feedback signal of the rotation direction cannot be provided at the same time

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