摘要:
An optical module (120) includes: a light source (121) configured to emit diffusion light to tracks (SA1, SA2, SI1, SI2); one light receiving array (PA2) and another light receiving array (PA1) which are arranged across the light source (121) in a width direction (R) substantially vertical to the measurement direction (C); a light receiving array (PI2) arranged between the one light receiving array (PA2) and the light source (121), and configured to receive light which is reflected at the tracks (SI2) having a first incremental pattern; and a light receiving array (PI1) arranged between the another first light receiving array (PA1) and the light source (121), and configured to receive light which is reflected at the tracks (SI1) having a second incremental pattern which pitch is longer than a pitch of the first incremental pattern.
摘要:
Das optische Winkel- und/oder Weg-Messmodul (1) zur Messung seiner Lage gegenüber einer Massverkörperung (3) beinhaltet Mittel (44) zur Lichtdetektion und Mittel (45-47) zur Abbildung eines Teils der Massverkörperung (3) auf die Detektionsmittel (44). Weiter beinhaltet das Modul (1) einen Strahlteiler (43), mittels welchen einerseits einfallendes Licht (81) auf die Massverkörperung (3) und andererseits von der Massverkörperung (3) kommendes Licht (82) zu den Detektionsmitteln (44) führbar ist. Das Modul (1) kann zwei Modulelemente (10, 11) beinhalten, von denen ein erstes Modulelement (10) die Detektionsmittel (44) und ein zweites Modulelement (11) Mittel zur Ermöglichung einer gleitenden Relativbewegung gegenüber der Massverkörperung (3) aufweist. Mit dem Modul (1) kann ein integrierter Einbaugeber realisiert werden, welcher kostengünstig sowie integriert einbaubar ist und trotzdem eine hohe Auflösung ermöglicht.
摘要:
A rotation detector has a simple structure and operates reliably to check quickly for erroneous installation as an encoder for detecting the rotation rate of a multi-rotation body that rotates for a finite number of revolutions of one revolution or more. A stator member is formed of a housing (1) and a cover (3) coupled together, and a detection window (16) is formed on an outer peripheral wall of the housing. A rotor member (2) is rotatably supported by the housing and the cover, and a rotary ring (10) arranged concentrically with the center of rotation of the rotor member is housed in the stator member. Rotation of the rotor member is intermittently transmitted to the rotary ring via an intermediate gear. According to the variation of outputs from photointerrupters that turn on or off according to the rotation of the rotary ring, an absolute position of the rotor member is detected. Also, an indicator is arranged on the rotary ring so that the indicator is visible through the detection window (1b) only when the rotary ring is in a neutral position.
摘要:
In a method of detecting the absolute position of a servo control system which is controlled according to, for example, a numerical control program, the rotational ratio between a resolver (106) and an absolute encoder (110) which rotate together with a servo motor (105) is set at a predetermined value, and the absolute position of an operating shaft is detected with a high accuracy from rotational outputs of both the resolver (106) and the absolute encoder (110). It is possible to detect the absolute positions of a plurality of operating shafts by using a single detection circuit in common.
摘要:
In a method of detecting the absolute position of a servo control system which is controlled according to, for example, a numerical control program, the absolute position of an operating shaft is detected with a high accuracy from an output corresponding to a predetermined rotational ratio between a resolver (106) and an absolute encoder (110) which rotate together with a servo motor (105), making it possible to rapidly stabilize any change of the absolute position of the operating shaft occurring when the servo control system is in an abnormal state.
摘要:
In a separate encoder (100), a scale(102) is further provided with an ABS track(106) that is arranged in parallel with an INC track(104) and a detection head(110) includes an ABS detection portion (114) that reads the ABS track(106). The separate encoder (100) includes a calculation portion (120,220,320) that obtains a yaw angle (ϕ) of the detection head(110) with respect to a scale(102) based on a gap(d) between an INC detection portion (112) and an ABS detection portion (114) and a difference amount (δ) between a position(Xinc) of the INC track(104), which is detected by the INC detection portion (112), and a position(Xabs) of the ABS track(106), which is detected by the ABS detection portion (114). The calculation portion (120, 220, 320) also obtains a signal strength(I) based on two-phase sine wave signals(Am, Bm) that are output from the INC detection portion (112). The separate encoder (100) further includes a display unit(130,220,320) that displays a plurality of yaw angles (ϕ) and the signal strengths(I) corresponding to the respective yaw angles (ϕ).
摘要:
Magnetic encoder apparatus (2) is described that comprises a plurality of magnetic sensor elements (e.g. Hall sensors) for reading an associated magnetic scale (4; 10) that produces a periodically repeating magnetic pattern. The plurality of magnetic sensor elements produce a plurality of sensor signals and an analyser (7) is provided for analysing the plurality of sensor signals to provide a measure of the position of the magnetic sensor elements relative to the associated magnetic scale (4; 10). The analyser (7) is arranged to use the plurality of sensor signals to assess the period (60) of the periodically repeating magnetic pattern sensed by the plurality of magnetic sensor elements. In this manner, the requirement to carefully match the period of the sensor elements with the periodically repeating magnetic pattern of the associated magnetic scale (4; 10) is avoided.