Detection device

Abstract

The invention relates to a detection device, which comprises an encoder which is used for encoding a reference signal. The encoder comprises a first area, a second area and a third area. The first area can move a route which the reference signal passes through relative to a reference position at a first given time so as to acquire a first given signal; the second area can move the route which thereference signal passes through relative to the reference position at a second given time so as to acquire a second given signal different from the first given signal; and the third area can move theroute which the reference signal passes through relative to the reference position at reference time between the first given time and the second given time so as to acquire a third given signal different from the first given signal or the second given signal.

Description

technical field [0001] The invention relates to a detection device, in particular to a detection device and an encoder thereof which can determine the moving or rotating direction of a movable component through encoding of a reference signal. Background technique [0002] figure 1 A schematic diagram showing a known encoder (encoder) E with two-state levels. The encoder E includes a plurality of gaps e11 and a plurality of blades e12, wherein any two blades e12 are separated from each other by a single gap e11. [0003] Figure 2A Represents an output waveform obtained through the action of a known encoder E (turning clockwise), Figure 2B Represents another output waveform obtained through the action of the known encoder E (rotating in the counterclockwise direction). Figure 3A Represents a schematic diagram of a detection mechanism K1 without direction with a known encoder E, Figure 3B express Figure 3A The output waveform of the detection mechanism K1. The detec...

AI Technical Summary

Problems solved by technology

[0006] Although the detection mechanism K2 can determine the direction of rotation through the phase difference h1 of the two photointerrupters PI-1 and PI-2, due to the mechanical inertia of the encoder E or the high / low level (Hi / Low ) under the action of the oscillation generated by the adjacency of the counter, it is easy to cause the calculation error of the counter, the reduction of the control accuracy of the zoom (Zoom), and the failure to achieve the expected precision control and other problems.

In addition, due to the use of directional and expensive photointerrupters PI-1 and PI-2 as detection equipment, cost reduction and effective use of space cannot be achieved

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