WO1993023323A1 - Guide rail deviation measurement device - Google Patents

Guide rail deviation measurement device Download PDF

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Publication number
WO1993023323A1
WO1993023323A1 PCT/AU1993/000225 AU9300225W WO9323323A1 WO 1993023323 A1 WO1993023323 A1 WO 1993023323A1 AU 9300225 W AU9300225 W AU 9300225W WO 9323323 A1 WO9323323 A1 WO 9323323A1
Authority
WO
WIPO (PCT)
Prior art keywords
carriage
guide rail
sensor
deviation
guide
Prior art date
Application number
PCT/AU1993/000225
Other languages
French (fr)
Inventor
William John Fahey
Original Assignee
Boral Johns Perry Industries Pty. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Boral Johns Perry Industries Pty. Ltd. filed Critical Boral Johns Perry Industries Pty. Ltd.
Publication of WO1993023323A1 publication Critical patent/WO1993023323A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B19/00—Mining-hoist operation
    • B66B19/002—Mining-hoist operation installing or exchanging guide rails
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/02—Guideways; Guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
    • B66B7/1207—Checking means
    • B66B7/1246—Checking means specially adapted for guides
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
    • G01B11/306—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces for measuring evenness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/0018—Measuring arrangements characterised by the use of mechanical techniques for measuring key-ways
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • G01C15/002—Active optical surveying means

Definitions

  • This invention relates to a deviation measurement device and in particular to a device for measuring the deviation of a lift guide rail from the vertical.
  • the object of this invention is to provide a deviation measurement device which can measure deviation of a guide rail from the vertical to enable suitable adjustment to take place.
  • the invention may be said to reside in a deviation measurement device for measuring the deviation of an article
  • a deviation measurement device for measuring the deviation of an article
  • an emitter for emitting a reference signal indicative of a plane or line, having a predetermined orientation
  • a carriage for support en said article
  • moving means for moving said carriage along said article
  • a sensor supported on said carriage for detecting said signal; wherein the sensor detects said signal as the carriage is moved along the article so that the sensor can produce an output indicative of the deviation of the carriage and therefore the article from the liae or plane having the predetermined orientation.
  • the sensor can output a signal indicative of the deviation of the article which may be a lift guide rail, from the vertical line or plane the position at which any deviation takes place can be determined to thereby enable adjustment of the guide rail at that position to be effected.
  • quality assurance checks can be made and guide rails adjusted if necessary to realign the guide rails and thereby improve ride quality in lift cars guided by and supported by the guide rails.
  • the emitter comprises a laser for emitting a laser beam in a vertical direction relative to the article which, in turn, may be a lif guide rail.
  • the carriage comprises: a mounting portion having at least one guide roller for contacting a front face of the guide rail and at least two guide rollers for contacting the side faces of the guide rail, at least one magnet for attracting the carriage onto said guide rail; and a sensor portion, a sensor supported by the sensor portion and a stepping motor for moving the sensor in a direction transverse to the vertical plane or line.
  • the carriage also supports a position measurer for providing an indication of the position of the carriage along the guide rail during movement of the carriage.
  • the position measurer comprises a toothed steel wheel and a position sensor, the wheel being connected to the at least one guide roller for contacting the front face of the guide rail so that upon rotation of the roller the toothed wheel rotates and rotation of the toothed wheel is sensed by the position sensor for providing an indication of the distance the carriage has moved and therefore the position of the carriage.
  • At least one of the rollers for contacting the side face of the guide rail is adjustable and spring mounted so that the at least one guide roller can be adjusted to enable the pair of guide rollers to selectively sandwich the guide rail so that the carriage is positively held to the guide rail.
  • the senor is coupled to a processor for • receiving the output signal and processing the output signal to provide an indication of the deviation of the guide rail from the vertical plane or line.
  • the moving means comprises a lift car.
  • Figure 1 is a view showing the device according to the preferred embodiment of the invention.
  • Figure 2 is a view along the line II-II of figure 1;
  • Figure 3 is a view along the line III-III of figure 2;
  • Figure 4 is a view along the line IV-IV of figure 2;
  • FIG. 5 is a detailed view of part of the preferred embodiment of the invention.
  • Figure 6 is a view along the line VI-VI of figure 1;
  • Figure 7 is a view along the line VII-VII of figure 6; and Figure 8 is a graph showing a typical output showing a measured deviation.
  • the device comprises an emitter 10 which is fixed to a lift guide rail 12 and a carriage 14 which is adapted for movement along the lift guide rail 12.
  • the emitter 10 is preferably a laser and most preferably is a standard LECIA LNA 22 laser with a vertical plane adaptor which vertically projects a rotating laser beam. Since the laser 10 is well known its details will not be further described herein. However, the laser 10 is mounted to the guide rail 12 by suitable brackets 20 and has a range of 100 meters. If the lift shaft is longer than 100 meters the laser 10 can be moved at 100 meter spacings down the lift shaft. The laser 10 is adapted for rotation so that a vertical laser beam 18 can be produced to enable measurements of the deviation both the sides 12a and front face 12b of the guide rail 12 to be made with respect, to the vertical.
  • the carriage 14 comprises a carriage mount portion 30 which mounts the carriage onto the guide rail 12 and a sensor support section 32 which supports a sensor 50.
  • the carriage 14 is moved by a lift car 25 which is the conventional lift car used in the lift well.
  • the carriage 14 is suspended from a support arm 36 which is coupled to the lift car 25.
  • the support arm 36 has a flexible link 38 such as a spring which is connected to the carriage 14 via and eye 40 suitably mounted on the carriage 14.
  • the flexible link 14 ensures that the carriage 14 is floating with respect to the lift car 25 so that the carriage 14 can follow the guide rail and will not be buffeted or have its movement influenced by any buffeting or movement of the. lift car 25 .
  • a processor 42 such as a portable computer and interface electronics 44 can be mounted on the lift car 25 and coupled to the carriage 14 via cables 46 which are supported by the arm 36.
  • the cables 46 supply power to the various components which require power and which are carried by the carriage 14 and also transmit output signals from the sensor 50 to the processor 42 for processing.
  • the carriage 14 is more fully shown in figures 2 to 7
  • the mount portion 30 comprises a generally ⁇ -shaped channel section 52 which has side walls 54 and a rear wall 56.
  • the sensor portion 32 sits on top of the section 30 and extends outwardly from it and is supported by a bracket 58.
  • the front of the U-shaped channel section 52 is open to enable the guide rail 12 which is shown in dotted lines in figures 2 and 3 to be received within the U-shaped channel 52.
  • a pair of primary rollers 60 and 62 are supported on axles 64 journalled to the side walls 54.
  • the rollers 60 and 62 contact the front face 12b of the guide rail 12.
  • a plurality of electromagnets 66 are supported on rear face 56 and the carriage 14 towards the guide rail 12.
  • Two pair of secondary guide rollers 70 and 72 are arranged to contact the side faces 12a of the guide rail 12 (and are shown spaced from the guide rail 12 in figure 2 for ease of illustration) the guide rollers 70 and 72 are supported by guide rail support elements 74 and 76.
  • the elements 74 and 76 are generally tubular members of square cross-section.
  • the rollers 70 and 72 are journalled in U-shaped brackets 78 (which are fixed by rivets 77 or the like (see figure 4) to the elements 74 and 76) .
  • the U- shaped brackets 78 and the rollers 70 and 72 project through openings 80 (see figure 4) in the side walls 54.
  • the element 74 is fixed to its adjacent side wall 54 by bolts 82 or the like.
  • the other element 76 is spring mounted with respect to the U-shaped channel 52 so that the pair or rollers 70 are also spring mounted with respect to the guide rail 12.
  • the elements 76 are guided on pins 84 and are spring mounted via spring mounted adjusters 90.
  • the spring mounted adjusters 90 comprise a locking cam 92 and a bolt 94 which is fixed to the side wall 54 by nut 96 and which passes through the element 76.
  • the bolt 94 carries a pin 98 on which the member 92 is pivotally coupled.
  • the locking cam 92 has a cam portion 100 which engages a plate 102.
  • a spring 104 ' extends between an internal side surface 106 of element 76 which is adjacent to the wall 54 and a retaining washer 108 which is free to float on the bolt 94.
  • Plate 102 is able to float on the pin 98 and when the locking cam 92 is adjusted to push the plate 102 in the direction of arrow A to compress the spring 104, the element 76, together with the rollers 70 supported by it are forced also in the direction of arrow A inwardly towards the rail 12 so that the rollers 70 and 72 sandwich the guide rail 12 between themselves.
  • the locking cam 92 is moved to enable the plate 102 to move in the direction of arrow B to release the tension of the spring 104 the element 76 can be pulled away in the direction of arrow B from the wall 54 to thereby remove the roller 70 from the guide rail 12.
  • the carriage 14 can be locked onto the guide rail 12 by sandwiching the guide rail 12 between the rollers 70 and 72 or released from the guide rail 12 by moving the rollers 70 away from the guide rail 12 to enable the carriage to be selectively mounted on the guide rail or selectively removed from the guide rail.
  • Actuation of the electromagnets 66 which attract the carriage towards the guide rail 12 completes the mounting of the carriage 14 onto the guide rail 12.
  • the roller 60 has mounted on its axle 64 a toothed wheel 110 which cooperates with a sensor 112 to provide an indication of the position of the carriage 14 along the guide rail 12.
  • the wheel 110 is toothed and therefore has notches between the teeth so that the teeth and notches can be detected by the sensor 112.
  • the wheel 110 rotates with the roller 60 and the teeth and notches are detected by the sensor 112 so that an indication of the distance the carriage 14 has moved and therefore the position of the carriage 14 along the guide rail is provided.
  • the output of the sensor 112 is connected back to the computer 42 by the cables 46.
  • the sensor section 32 is more fully shown in figures 6 and 7 and also comprises a generally U-shaped channel having side walls 120, base 122 and end brackets or walls 124.
  • a stepping motor 130 is supported in the portion 32 and has an output sprocket 132 which via reducing gearing 134 drives a sprocket 136 to which a continuous belt 138 is coupled.
  • the belt 138 is also coupled with sprocket 140 and is moved in a continuous path about the sprockets 136 and 140 when the stepping motor 130 is actuated.
  • a pair of guide rails 142 extend between the end walls or brackets 124 and support a sensor mount 144.
  • the sensor mount 144 in turn supports the sensor 50.
  • Mount 144 is supported on the guide rails 142 by guide elements 150 so that the mount 144 can slide on the guide rails 142 in the direction of double headed arrow C.
  • the mount 144 also has a link 152 which is firmly fastened to a portion of the belt 138 by a fastener 154.
  • the belt 138 is driven about the sprockets 136 and 140 to thereby move the mount 144 and sensor 50 on the guide rails 142.
  • the sensor 50 includes a window 51 and has two photo diode strips 25 millimetres long and is tuned to the wavelength of the laser beam 18 from the laser 10.
  • the stepping motor 130 is able to move the mount 144 and therefore the sensor 50 in increments of, for example, .5 millimetres.
  • an output pulse is generated.
  • the pulse from each diode is amplified and their peak values compared. If the output of each diode is equal then the laser beam is passing through the center of the two diodes. If unequal then the laser beam is offset. The amount of this offset is converted into distance and together with the position of the stepping motor a relative position of the rail to the laser beam is obtained.
  • the stepping motor 130 can be used to adjust the position of the sensor 50 if the offset is greater than one millimetre.
  • the output of two diodes therefore provides a fine adjustment to give a deviation from the central position and any movement of the stepping motor provides a course adjustment of the deviation.
  • the stepping motor will effectively move the sensor 50 to attempt to track the laser beam thereby providing a deviation amount by virtue of the displacement of the mount 144 and therefore sensor 50 and also the output of the diodes in the sensor 50.
  • the laser beam offset detected by the sensor 50 is stored to a data file in processor 42 at predetermined distances, for example, every 300 millimetres.
  • a measurement of guide rail deviation to the vertical laser beam can be obtained down the length of the guide rail 12.
  • Figure 8 shows a typical graph showing an output produced by the processor 42 in which the deviation of the guide rail in millimetres is shown on the Y axis and the distance along th guide rail in meters is shown in the X axis.
  • carriage 14 could also carry sensors to pick up fishplate and rail bracket positions on the guide rail to assist in identifying the position of any deviation of the guide rail.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

A deviation measurement device for measuring the deviation of a lift guide rail in a lift well is disclosed which comprises a laser (10) for emitting a reference beam relative to a lift rail (12). A carriage (14) is mounted on the rail (12) and is freely suspended from a lift car (25) by a support arm (36). The carriage (14) has a carriage mount (30) with guide rollers (70-72) for allowing the carriage to move on the rail (12) and a sensor support section (32) for mounting a sensor for detecting the laser beam. A stepping motor (130) is provided for moving the sensor (50) so that the sensor (50) tracks the laser beam and provides an indication of the deviation of the guide rail (12).

Description

GUIDE RAIL DEVIATION MEASUREMENT DEVICE
This invention relates to a deviation measurement device and in particular to a device for measuring the deviation of a lift guide rail from the vertical.
One parameter which influences ride quality of lift cars in high rise buildings is the deviation of the guide rails which guide and support the lift car. If the guide rails are not vertical buffeting of the lift car can take place which decreases ride quality.
The object of this invention is to provide a deviation measurement device which can measure deviation of a guide rail from the vertical to enable suitable adjustment to take place.
The invention may be said to reside in a deviation measurement device for measuring the deviation of an article comprising: an emitter for emitting a reference signal indicative of a plane or line, having a predetermined orientation; a carriage for support en said article; moving means for moving said carriage along said article; and a sensor supported on said carriage for detecting said signal; wherein the sensor detects said signal as the carriage is moved along the article so that the sensor can produce an output indicative of the deviation of the carriage and therefore the article from the liae or plane having the predetermined orientation. Since the sensor can output a signal indicative of the deviation of the article which may be a lift guide rail, from the vertical line or plane the position at which any deviation takes place can be determined to thereby enable adjustment of the guide rail at that position to be effected. Thus quality assurance checks can be made and guide rails adjusted if necessary to realign the guide rails and thereby improve ride quality in lift cars guided by and supported by the guide rails.
Preferably the emitter comprises a laser for emitting a laser beam in a vertical direction relative to the article which, in turn, may be a lif guide rail.
Preferably the carriage comprises: a mounting portion having at least one guide roller for contacting a front face of the guide rail and at least two guide rollers for contacting the side faces of the guide rail, at least one magnet for attracting the carriage onto said guide rail; and a sensor portion, a sensor supported by the sensor portion and a stepping motor for moving the sensor in a direction transverse to the vertical plane or line.
Preferably the carriage also supports a position measurer for providing an indication of the position of the carriage along the guide rail during movement of the carriage.
Preferably the position measurer comprises a toothed steel wheel and a position sensor, the wheel being connected to the at least one guide roller for contacting the front face of the guide rail so that upon rotation of the roller the toothed wheel rotates and rotation of the toothed wheel is sensed by the position sensor for providing an indication of the distance the carriage has moved and therefore the position of the carriage.
Preferably at least one of the rollers for contacting the side face of the guide rail is adjustable and spring mounted so that the at least one guide roller can be adjusted to enable the pair of guide rollers to selectively sandwich the guide rail so that the carriage is positively held to the guide rail.
Preferably the sensor is coupled to a processor for • receiving the output signal and processing the output signal to provide an indication of the deviation of the guide rail from the vertical plane or line.
Preferably the moving means comprises a lift car.
A preferred embodiment of the invention will be described, by way of example, with reference to the accompanying drawings in which:
Figure 1 is a view showing the device according to the preferred embodiment of the invention;
Figure 2 is a view along the line II-II of figure 1; Figure 3 is a view along the line III-III of figure 2;
Figure 4 is a view along the line IV-IV of figure 2;
Figure 5 is a detailed view of part of the preferred embodiment of the invention;
Figure 6 is a view along the line VI-VI of figure 1;
Figure 7 is a view along the line VII-VII of figure 6; and Figure 8 is a graph showing a typical output showing a measured deviation.
With reference to figure 1, the device comprises an emitter 10 which is fixed to a lift guide rail 12 and a carriage 14 which is adapted for movement along the lift guide rail 12.
The emitter 10 is preferably a laser and most preferably is a standard LECIA LNA 22 laser with a vertical plane adaptor which vertically projects a rotating laser beam. Since the laser 10 is well known its details will not be further described herein. However, the laser 10 is mounted to the guide rail 12 by suitable brackets 20 and has a range of 100 meters. If the lift shaft is longer than 100 meters the laser 10 can be moved at 100 meter spacings down the lift shaft. The laser 10 is adapted for rotation so that a vertical laser beam 18 can be produced to enable measurements of the deviation both the sides 12a and front face 12b of the guide rail 12 to be made with respect, to the vertical.
The carriage 14 comprises a carriage mount portion 30 which mounts the carriage onto the guide rail 12 and a sensor support section 32 which supports a sensor 50. The carriage 14 is moved by a lift car 25 which is the conventional lift car used in the lift well. The carriage 14 is suspended from a support arm 36 which is coupled to the lift car 25. The support arm 36 has a flexible link 38 such as a spring which is connected to the carriage 14 via and eye 40 suitably mounted on the carriage 14. The flexible link 14 ensures that the carriage 14 is floating with respect to the lift car 25 so that the carriage 14 can follow the guide rail and will not be buffeted or have its movement influenced by any buffeting or movement of the. lift car 25 .
A processor 42 such as a portable computer and interface electronics 44 can be mounted on the lift car 25 and coupled to the carriage 14 via cables 46 which are supported by the arm 36. The cables 46 supply power to the various components which require power and which are carried by the carriage 14 and also transmit output signals from the sensor 50 to the processor 42 for processing.
The carriage 14 is more fully shown in figures 2 to 7
With reference to figures 2 and 3 the mount portion 30 comprises a generally ϋ-shaped channel section 52 which has side walls 54 and a rear wall 56. The sensor portion 32 sits on top of the section 30 and extends outwardly from it and is supported by a bracket 58.
The front of the U-shaped channel section 52 is open to enable the guide rail 12 which is shown in dotted lines in figures 2 and 3 to be received within the U-shaped channel 52.
A pair of primary rollers 60 and 62 are supported on axles 64 journalled to the side walls 54. The rollers 60 and 62 contact the front face 12b of the guide rail 12. A plurality of electromagnets 66 are supported on rear face 56 and the carriage 14 towards the guide rail 12.
Two pair of secondary guide rollers 70 and 72 are arranged to contact the side faces 12a of the guide rail 12 (and are shown spaced from the guide rail 12 in figure 2 for ease of illustration) the guide rollers 70 and 72 are supported by guide rail support elements 74 and 76. The elements 74 and 76 are generally tubular members of square cross-section. The rollers 70 and 72 are journalled in U-shaped brackets 78 (which are fixed by rivets 77 or the like (see figure 4) to the elements 74 and 76) . The U- shaped brackets 78 and the rollers 70 and 72 project through openings 80 (see figure 4) in the side walls 54.
The element 74 is fixed to its adjacent side wall 54 by bolts 82 or the like. The other element 76 is spring mounted with respect to the U-shaped channel 52 so that the pair or rollers 70 are also spring mounted with respect to the guide rail 12. The elements 76 are guided on pins 84 and are spring mounted via spring mounted adjusters 90.
As shown in figure 5 the spring mounted adjusters 90 comprise a locking cam 92 and a bolt 94 which is fixed to the side wall 54 by nut 96 and which passes through the element 76. The bolt 94 carries a pin 98 on which the member 92 is pivotally coupled. The locking cam 92 has a cam portion 100 which engages a plate 102. A spring 104 ' extends between an internal side surface 106 of element 76 which is adjacent to the wall 54 and a retaining washer 108 which is free to float on the bolt 94. Plate 102 is able to float on the pin 98 and when the locking cam 92 is adjusted to push the plate 102 in the direction of arrow A to compress the spring 104, the element 76, together with the rollers 70 supported by it are forced also in the direction of arrow A inwardly towards the rail 12 so that the rollers 70 and 72 sandwich the guide rail 12 between themselves. When the locking cam 92 is moved to enable the plate 102 to move in the direction of arrow B to release the tension of the spring 104 the element 76 can be pulled away in the direction of arrow B from the wall 54 to thereby remove the roller 70 from the guide rail 12. Thus, by actuation of the locking cam 92 the carriage 14 can be locked onto the guide rail 12 by sandwiching the guide rail 12 between the rollers 70 and 72 or released from the guide rail 12 by moving the rollers 70 away from the guide rail 12 to enable the carriage to be selectively mounted on the guide rail or selectively removed from the guide rail.
Actuation of the electromagnets 66 which attract the carriage towards the guide rail 12 completes the mounting of the carriage 14 onto the guide rail 12.
The roller 60 has mounted on its axle 64 a toothed wheel 110 which cooperates with a sensor 112 to provide an indication of the position of the carriage 14 along the guide rail 12.
As the carriage 14 is moved along the guide rail the rollers 60 and 62 as well as the rollers 70 and 72 rotate. The wheel 110 is toothed and therefore has notches between the teeth so that the teeth and notches can be detected by the sensor 112. The wheel 110 rotates with the roller 60 and the teeth and notches are detected by the sensor 112 so that an indication of the distance the carriage 14 has moved and therefore the position of the carriage 14 along the guide rail is provided. The output of the sensor 112 is connected back to the computer 42 by the cables 46.
The sensor section 32 is more fully shown in figures 6 and 7 and also comprises a generally U-shaped channel having side walls 120, base 122 and end brackets or walls 124.
A stepping motor 130 is supported in the portion 32 and has an output sprocket 132 which via reducing gearing 134 drives a sprocket 136 to which a continuous belt 138 is coupled. The belt 138 is also coupled with sprocket 140 and is moved in a continuous path about the sprockets 136 and 140 when the stepping motor 130 is actuated.
A pair of guide rails 142 extend between the end walls or brackets 124 and support a sensor mount 144. The sensor mount 144 in turn supports the sensor 50.
Mount 144 is supported on the guide rails 142 by guide elements 150 so that the mount 144 can slide on the guide rails 142 in the direction of double headed arrow C. The mount 144 also has a link 152 which is firmly fastened to a portion of the belt 138 by a fastener 154.
As the stepping motor' 130 is actuated under the control of the processor 42 via signals applied through cables 46 the belt 138 is driven about the sprockets 136 and 140 to thereby move the mount 144 and sensor 50 on the guide rails 142.
The sensor 50 includes a window 51 and has two photo diode strips 25 millimetres long and is tuned to the wavelength of the laser beam 18 from the laser 10. The stepping motor 130 is able to move the mount 144 and therefore the sensor 50 in increments of, for example, .5 millimetres. When the laser beam 18 passes over the photo diodes an output pulse is generated. The pulse from each diode is amplified and their peak values compared. If the output of each diode is equal then the laser beam is passing through the center of the two diodes. If unequal then the laser beam is offset. The amount of this offset is converted into distance and together with the position of the stepping motor a relative position of the rail to the laser beam is obtained. The stepping motor 130 can be used to adjust the position of the sensor 50 if the offset is greater than one millimetre.
The output of two diodes therefore provides a fine adjustment to give a deviation from the central position and any movement of the stepping motor provides a course adjustment of the deviation. Thus, the stepping motor will effectively move the sensor 50 to attempt to track the laser beam thereby providing a deviation amount by virtue of the displacement of the mount 144 and therefore sensor 50 and also the output of the diodes in the sensor 50.
As the lift car 25 is moved down the lift well the carriage 14 follows under the influence of its own weight.
The laser beam offset detected by the sensor 50 is stored to a data file in processor 42 at predetermined distances, for example, every 300 millimetres. Thus, a measurement of guide rail deviation to the vertical laser beam can be obtained down the length of the guide rail 12.
Figure 8 shows a typical graph showing an output produced by the processor 42 in which the deviation of the guide rail in millimetres is shown on the Y axis and the distance along th guide rail in meters is shown in the X axis.
In another embodiment (not shown) carriage 14 could also carry sensors to pick up fishplate and rail bracket positions on the guide rail to assist in identifying the position of any deviation of the guide rail.
Since modifications within the spirit and scope of the invention may readily be effected by persons skilled within the art, it is to be understood that this invention is not limited to the particular embodiment described by way of example hereinabove.

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
1. A deviation measurement device for measuring the deviation of an article comprising: an emitter for emitting a reference signal indicative of a plane or line, having a predetermined orientation; a carriage for support on said article; moving means for moving said carriage along said article; and a sensor supported on said carriage for detecting said signal; wherein the sensor detects said signal as the carriage is moved along the article so that the sensor can produce an output indicative of the deviation of the carriage and therefore the article from the line or plane having the predetermined orientation.
2. The device of claim 1, wherein the emitter comprises a laser for emitting a laser beam in a vertical direction relative to the article which, in turn, may be a lift guide rail.
3. The device of claim 1, wherein the carriage comprises: ι a mounting portion having at least one guide roller for contacting a front face of the guide rail and at least two guide rollers for contacting the side faces of the guide rail, at least one magnet for attracting the carriage onto said guide rail; and a sensor portion, a sensor supported by the sensor portion and a stepping motor for moving the sensor in a direction transverse to the vertical plane or line.
4. The device of claim 3, wherein the carriage also supports a position measurer for providing an indication of the position of the carriage along the guide rail during movement of the carriage.
5. The device of claim 4, whereinthe position measurer comprises a toothed steel wheel and a position sensor, the wheel being connected to the at least one guide roller for contacting the front face of the guide rail so that upon rotation of the roller the toothed wheel rotates and rotation of the toothed wheel is sensed by the position sensor for providing an indication of the distance the carriage has moved and therefore the position of the carriage.
6. The device of claim 3, wherein at least one of the rollers for contacting the side face of the guide rail is adjustable and spring mounted so that the at least one guide roller can be adjusted to enable the pair of guide rollers to selectively sandwich the guide rail so that the carriage is positively held to the guide rail.
7. The device of claim 1, wherein the sensor is coupled to a processor for receiving the output signal and processing the output signal to provide an indication of the deviation of the guide rail from the vertical plane or line.
8. The device of claim 1, wherein the moving means comprises a lift car.
PCT/AU1993/000225 1992-05-19 1993-05-17 Guide rail deviation measurement device WO1993023323A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPL249692 1992-05-19
AUPL2496 1992-05-19

Publications (1)

Publication Number Publication Date
WO1993023323A1 true WO1993023323A1 (en) 1993-11-25

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EP0859215A1 (en) * 1996-08-30 1998-08-19 Technical System Co., Ltd. Photoelectric displacement detector
EP0905080A2 (en) * 1997-09-25 1999-03-31 Otis Elevator Company Rail survey unit
JP2004532999A (en) * 2001-07-06 2004-10-28 インベンテイオ・アクテイエンゲゼルシヤフト Method and apparatus for determining guide rail linearity
DE202006007987U8 (en) * 2006-05-17 2007-02-15 Goldschmidt Thermit Gmbh profiler
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CN105270958A (en) * 2014-06-13 2016-01-27 通力股份公司 Apparatus and method for alignment of elevator guide rails
CN107101549A (en) * 2017-06-05 2017-08-29 林肯电梯(中国)有限公司 Vertical circulation multi-storied garage outer guide detection means
CN107839714A (en) * 2017-10-24 2018-03-27 中南大学 A kind of the two-dimensional laser device for dynamically detecting and method of profile of steel rail and ripple mill
WO2018170627A1 (en) * 2017-03-18 2018-09-27 深圳市方鹏科技有限公司 High precision measuring instrument using computer control
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EP3466859A1 (en) 2017-10-09 2019-04-10 KONE Corporation Guide rail alignment method and arrangement
US10315887B2 (en) * 2015-04-23 2019-06-11 Kone Corporation Arrangement and method for aligning guide rails in an elevator shaft
DE102017223736A1 (en) * 2017-12-22 2019-06-27 Müller-Bbm Rail Technologies Gmbh MEASURING DEVICE SUPPORT FOR MEASURING A RAILED RAIL
JP2019182589A (en) * 2018-04-09 2019-10-24 三菱電機株式会社 Guide rail cleaning device for elevator
CN110407056A (en) * 2018-04-30 2019-11-05 奥的斯电梯公司 Elevator safety gear actuation means
CN113686248A (en) * 2021-08-23 2021-11-23 北京京东乾石科技有限公司 Offset measurement apparatus, offset measurement method, electronic apparatus, and readable storage medium
US11235950B2 (en) 2018-04-30 2022-02-01 Otis Elevator Company Elevator safety gear actuation device
CN114104894A (en) * 2021-11-09 2022-03-01 青岛市特种设备检验研究院 Multi-parameter detection method for quality of elevator guide rail
US11434104B2 (en) 2017-12-08 2022-09-06 Otis Elevator Company Continuous monitoring of rail and ride quality of elevator system

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