FR2704057A1 - Portable measuring device for detecting the boom height of a railway line. - Google Patents

Abstract

The invention relates to a portable measuring apparatus for detecting boom heights of a railway track. This device is equipped with an optical sighting device (2) and a mechanical linkage consisting of a base support (5) and a vertical support (6) connected to it and supporting the sighting device . The angle between these supports is adjustable. Associated with the sighting device (2) is an optical distance measuring device (3) and an angle measuring device (14) of the angle of rotation about a horizontal axis (15) and a measuring device of additional angle (16) of an angle of rotation about a vertical axis (17). The base support (5) is connected to an inclination measuring device (9), and a computer (8) is connected to the distance measuring device (3), the angle measuring device ( 14, 16) and the tilt measuring device (9). The invention is applicable in the field of marking out railways.

Description

1 2704057

  The invention relates to a portable measuring device for detecting the boom height of a railroad track, comprising an optical sighting device and a mechanical linkage connected thereto which consists of a base support provided for the application. to the two rails of the railway track to be measured and a vertical support hingedly connected thereto and carrying the sighting device, the angle between the base support and the vertical support being

  adjustable by means of an adjusting device.

  It is already known from an article entitled "Gleisvermarkung im DB-Streckennetz" published in the journal "Eisenbahningenieur", May 1982, pages 221-227, such a portable measuring apparatus and designated by apparatus for placing arrow heights to grasp the arrow heights of a railway. Older achievements of boom height machines are equipped with an alignment laser (Figure 10). However, in the meantime, various manufacturers are offering boom height measuring devices with optical sighting (Figure 11). Such devices for placing arrows have the disadvantage that can not be executed

  a fixed point measurement or a wheelbase measurement.

  However, it is precisely these measurements that take a lot of time and whose accuracy still depends on

  a very large measure of the reliability of the surveyors.

  However, according to the aforementioned article it is already known to perform, during local surveys, in addition also the wheelbase using a computer electronic tachometer. However, the object of the present invention is the creation of a portable measuring device of the type described at the beginning that can be used, while remaining portable, also

  for measurements of wheelbase and fixed points.

  This object is achieved according to the invention with a portable measuring device of the type indicated at the beginning in that it is associated with the optical sighting device rotatably mounted an optical distance measuring device.

2 2704057

  and an angle measuring device for detecting an angle of rotation about a horizontal axis and an additional angle measuring device for detecting an angle of rotation about a vertical axis, and that the base support is provided with an inclination measuring device, and in that a calculator is provided in connection with the distance measuring apparatus, the angle measuring device and the

tilt measuring device.

  Such a distance measuring device allows, in connection with the mechanical linkage, accurate laying of the measuring device on the rails, a reference face on the upper face of the rail, and a detection of fixed points and wheelbase to the nearest millimeter. In this case, it is advantageous that these measurements can be performed without preliminary work which could have an influence on the accuracy. In addition, all measurements for boom height, wheelbase and fixed points can be performed without changing the position of the meter. It is also advantageous to be able to calculate additional railway parameters, such as the cant, the track gauge and the arc length between the different points of the track, using the data entered.

drawing of long ropes.

  Thus, the solution according to the invention realizes a universal measuring device for the identification of the track which is, now as before, carried out in a portable way with a view to a quick and safe commissioning and also for a rapid removal of the railroad, and which simplifies in connection with distance and angle capture, especially for the measurement of boom heights,

necessary manipulations.

  According to other advantageous and partly inventive embodiments, a measuring unit constituted by the optical sighting device and the distance measuring device has a level and can be displaced relative to the vertical support by means of adjusting screws, and the device

  adjustment is made in the form of a threaded spindle.

3 2704057

  The invention will be better understood, and other purposes, features, details and advantages thereof

  will become clearer during the description

  explanatory text which will follow with reference to the accompanying schematic drawings, given solely by way of example, and in which: - Figure 1 is a view of the portable measuring apparatus in the longitudinal direction of railway; - Figure 2 is a top view of the measuring apparatus; - Figure 3 is a view of the measuring apparatus in the longitudinal direction of the sleepers; - Figure 4 is a representation of the quantities to calculate the wheelbase measurement; and FIG. 5 is a schematic representation for

  determine the arrow heights.

  The portable measuring apparatus 1 visible in FIGS. 1 to 3, which is also referred to as an arrow height setting apparatus, consists essentially of an optical sighting device 2, an optical distance measuring device 3 and a mechanical linkage 4 connected thereto. This consists of a base support 5 extending perpendicular to the longitudinal direction of the track and a vertical support 6 hingedly connected thereto and carrying the sighting device 2 and the distance measurement 3. The latter is additionally connected by an adjusting device 7 in the form of a pin articulated to the base support 5. In addition, a calculator 8, a device, is associated with the base support 5. tilt measuring device 9 for transverse inclination and clamping devices 10 for attachment to rails 11

of a railway line 12.

  As can be seen in particular in FIG. 3, a measurement unit 13 consisting of the optical sighting device 2 and the distance measuring device 3 has associated an angle measuring device 14 for capturing a corner angle. rotation about a horizontal axis 15 and a device

4 2704057

  additional angle measurement 16 to enter the angle of rotation about a vertical axis 17. The measuring unit 13, independently of the position of the vertical support 6, can be moved by adjusting screws 18 exactly in a verifiable vertical position using a level 19. Laterally at the side of the track 12, there are provided mats each having a fixed point 21 which are provided,

  known, before the measurement, of reflectors 23.

  The indications relating to the distance and the angles visible in FIGS. 1 to 5 relate essentially to the measurement of the fixed points. To this end, the measuring apparatus 1 is placed on the railway track 12 and is locked with the aid of the clamping devices 10 on the rails 11. Next, the measuring unit 13 is brought to the aid of the adjusting screw 18 in a vertical position relative to the vertical axis 17, and after performing a preliminary adjustment, an automatic zero compensation is performed. The aiming point 2 is aimed at the fixed point 21. When the measurement is made at night, the aforementioned reflector 23 is targeted by a laser aiming beam which is introduced into the path of the spokes of the objective. Then, by pressing keys, you can measure the distance and the angles. Then, the spacing and the height of the railway line 12 at the fixed point 21 are

  calculated and displayed on a plasma display board.

  (Fixed point spacing 1 = 1o-1 'hM = lo-sino, fixed point height h = ho + hM + h). The result can be output in addition to a protocol printer. It is also possible to store the data on a magnetic data medium (floppy disk, etc.). The calculations are performed in the computer 8. The analog signal of the tilt measuring device 9 is introduced by an A / D converter into the computer 8 and is processed. The power supply is provided by a small external accumulator 22 portable and rechargeable. The measurement of fixed points, with this measuring apparatus 1, can be carried out with millimeter precision relative to the spacing and height of the fixed point 21 with respect to

2704057

  track 12 taking into account the slope and the longitudinal inclination. To check the conformity of the two fixed points 21, the railway administrations indicate the difference between two opposite fixed points 21 as so-called wheelbase measurement S (FIG. 4). This wheelbase measure [S = (X1 - X2) + (Y, - Y2) 2 + (Z1 - Z2) 2 is performed following the described measurement of the fixed points without changing the position of the measuring apparatus 1 to track 12. To perform the measurement, one of the fixed points 21 is first aimed at and measured with the aid of the angle measuring device 14, 16 and the measuring apparatus distance 3, then the second fixed point 21 is targeted and it is also captured. The wheelbase measurement S can now be calculated from the two known vectors V1, V2 and angles as, l, a2 and 02. Suitably this wheelbase measurement will be performed in conjunction with the measurement of the fixed points. The location of meter 1 for measurement of wheelbase and fixed points

can be chosen freely.

  Another possibility of the use of the measuring apparatus 1 lies in the drawing of the long ropes and the leveling. For this function, in fact only the optical sighting device 2 of the

  measure 13 as a sighting device.

  For the measurement of the arrow heights according to FIG. 5 [arrow height fi = 1, sin (', - i)], a reflector 23 is placed progressively at the points every 5 m so that it is arranged vertically and or in alignment with the inner edge of the rail of an external queue 24 (file sloping in the arc of the track). A reflector 23 thus correctly positioned is then respectively targeted by the optical sighting device 2 and the sighting vector lu is measured. This aiming vector results from the spacing measurement using the distance measuring apparatus 3 as well as the vertical and horizontal angles which are detected at

6 2704057

  using the angle measuring devices 14 and 16. From

  of the values thus measured, additional measurement quantities such as track gauge, arc length and actual superelevation5 between the different points every 5 m can be obtained very simply.

7 2704057

Claims (3)

  1. Portable measuring device for detecting the boom height of a railway line with an optical sighting device and with a mechanical linkage connected thereto, which consists of a base support intended for application to both rails of the railway track to be measured and of a vertical support hingedly connected to it and carrying the sighting device, the angle between the base support and the vertical support being adjustable by means of a device for adjustment, characterized in that it is associated with the rotatably mounted optical sighting device (2) an optical distance measuring apparatus (3) and an angle measuring device (14) for detecting an angle of rotation about a horizontal axis (15) and an additional angle measuring device (16) for detecting an angle of rotation about a vertical axis (17), and that the base support (5) is connected to inclination measuring device (9), and in that a computer (8) in connection with the distance measuring apparatus (3), the angle measuring device (14, 16) and the measuring device inclination (9).   Measuring device according to Claim 1, characterized in that a measuring unit (13) consisting of the optical aiming device (2) and the distance measuring device (3) has a level (19) and is displaceable relative to the vertical support (6) by means of screws setting (18) or the like.   Measuring device according to one of claims 1   or 2, characterized in that the adjusting device (7) is   realized in the form of threaded spindle.