DE2436323A1 - Position information transmission system for tracked vehicle - vehicle has read head for scanning fixed data carriers - Google Patents

Abstract

Two different sets of independent data are read from the fixed data carriers, spaced along the path of movement of the vehicle, by means of a timing read head and one or more information read heads, during the movement of the vehicle relative to the fixed data carriers. The sets of data are supplied to a storage register and the selection of the stored data ia dependent on the direction of movement of the vehicle, for supply to an optical display inside the vehicle, e.g. to indicate the position along the route of the latter. The read head unit pref. employs two adjacent metal feelers, the output of one connected to the clock input of the register and the output of the other to the data input of the register.

Description

System for transferring information between fixed points and track-bound vehicles.

1Description The inventive arrangement is used for transmission from route information to track-bound vehicles as well as the optical display of information.

The route information is, for example, reached by the vehicle Position or a section of the route, for example information in the case of elevators about which floor has been reached serve to provide a fixed point with information about the point moving past Conveying objects 1.1 Basic functionality The system consists of a transducer and several data carriers that contain the information.

Each data carrier consists of metal surfaces, the arrangement of which is a A clock track and an information track form each clock - metal surfaces are two themselves overlapping metal surfaces on the information track, each of which is assigned one is assigned to the two possible directions of movement.

(For a detailed description, see 1.3) The reader speaks when it is present a relative movement on the metal surfaces of the clock.

The reading unit also recognizes metal surfaces on the information track.

Each cycle clocks a shift register, which is used as information contains the read status of the information track.

The information contained in the data carrier is therefore read serially and is available in parallel at the A outputs of the shift register when the Data carrier has completely passed the read head.

The transmission code can be freely selected.

1.2 Reading unit The reading unit consists of two arranged side by side Metal sensors (inductive proximity switches) in a known design as well as a Shift register in a well-known design. The output of a sensor is led to the clock input of the register, the output of the second sensor (information track) to the information entrance.

It is important that the circuit is designed so that the shift register it is then switched on if the clock track sensor is not addressed from the state ' t (recognized non-activation) in the state 'addressed t (recognized activation) transforms.

This is achieved by using a shift register which is based on a clock input signal change from 0 volts in the direction of positive operating voltage reacts, and the sensor is designed so that its output voltage is erratic Has change in the same direction when the aforementioned change of state entry.

The signal from the clock sensor is delayed at the register input guided. This delay can be omitted if the metal surfaces of the information track compared to those of the clock track are arranged leading.

1.3 The information carrier 1.3.1 Known arrangement of data carriers for Relative movement between carrier and reading unit are often divided into tracks, on which the information carrier surfaces to be queried are located, to be found of the support surfaces by the querying device often serves a pure clock, which from activated at the same distance to each other (compared to the environment changed) carrier surfaces.

An information track is assigned to each clock carrier area.

The state of an information carrier surface is queried when im Within the framework of the relative movement of the interrogation unit, an activated T aktträger rfläche is recognized.

This is the case when the track reading unit, which the clock track queries with one of the properties of the reading unit, the carrier material and the Activation of the carrier material corresponding to the minimum area of activated carrier material is covered.

This minimum area corresponds to a path difference in the direction of Relative axis of movement, which is referred to in the following as taV and corresponds to the minimum length of the clock carrier surface in the direction of the relative movement (see drawing 1).

With such an arrangement, between the clock carrier surfaces so much space should be given that the reading unit recognized non-activation can be.

The required minimum distance is referred to below as 1f ' (see drawing 1).

In summary, the arrangement described is characterized by that for each information carrier length sal a space of 1a1-1f 'occupies on the data carrier must be because the distance If 1 is required between the associated clock carrier surfaces is.

1.3.2 Change compared to the known arrangement Aim of the change is to make the information carrier smaller than with the known design is possible.

Each clock carrier surface is two on the information carrier track overlapping information carrier surfaces assigned, while one of the two information carrier surfaces is assigned to the forward direction, the second becomes the backward relative movement The distance between the two information centers in the middle of each other (Relativb ewegungs -richtung) is to be selected so that a direction-dependent Selection is guaranteed. It is designated 151 (see drawing 2). the The clock carrier surface must be extended by the dimension 15I in this version.

1.4 Display unit The display unit is used in elevator cages connected to the reading unit according to drawing 4.

It is a segment display with 8 segments for the Display of the numbers and the letters required in elevator operation.

1. 5 variants of the arrangement according to the invention The information carrier can be equipped with non-metal surfaces instead of metal surfaces. It appropriate sensors must be used in this case.

The information carrier can be negative for the described embodiment be formed. This fact is then by inverting the electrical Signals to be considered.

Claims (1)

2. Claims fj arrangement, characterized in that two different and mutually independent information from a data carrier by means of a clock and one or more information reading heads during a relative movement in one Dimension can be transferred and saved between the data carrier and reading heads and that the selection between the two pieces of information contained is by the direction the relative movement takes place. 2. Data carrier according to claim 1, characterized in that each Clock pulse on a clock track has a certain area of a texture or the current state of material deviating from the surroundings, and also each one of the two possible relative directions of movement overlapping Areas on the information track are assigned, with those two sides of the surface facing the two intended relative directions of movement, each an area is assigned to the information track (see also drawing 2). 3. Data carrier according to claim 2, characterized in that the one Information surfaces assigned to the tactile surface mutually move in the direction of the axis of relative movement e overlap.