Patent ID: 6291991
Filing Date: 2001-09-18
Classification: B65G

Abstract:
A device for continuously monitoring the junction of a conveyor belt (1) consisting of rubber or a rubber-like plastic, said conveyor belt being provided with embedded strength supports (2), whereby the junction area (6) comprises a head (7) and an end (8) and the device for determining deviations from rated values comprises:At least two reference marks (9, 10, 25, 26, 27, 28) arranged in such a way that at least one reference mark are located in each of the junction head (7) and the junction end (8) and disposed in an edge zone of a bottom side (3) or the top side (4) of the conveyor belt, or within a lateral edge zone (5) extending between the bottom and the top sides, whereby the reference marks are resistant to higher temperature and pressure loads as well as to moisture and other mechanical and chemical stresses;A reference mark detection system (I, III) adapted to the type of reference mark employed for measuring the speed and also the length of the junction, whereby the reference mark detection system is arranged on the left or on the right viewed in the direction of travel of the conveyor belt;A signal processing system (17, 18) for the reference mark detection system based on time measurement, whereby the signals supplied by the reference mark detectors (11, 12, 13; A, B, C, D) are processed and adapted in such a way that the beginning and the end of the time measurement can be reliably and precisely triggered;An identification system (II, III) independent of the direction of travel of the conveyor belt, said identification system comprising the following:an address (14, 22, 29, 30) for identifying the measuring site, said address being located outside of the junction area (6) near the head of the junction (7) and the end (8) of the junction, whereby the address is arranged on the left or the right viewed in the direction of travel of the conveyor belt, specifically within the edge area of the bottom side (3) or the top side (4) of the conveyor belt, or within the lateral edge zone (5) extending between the bottom and the top sides;an address detector (15, 23; C, D) adapted to the type of address employed, said address detector also being arranged on the left or the right viewed in the direction of travel of the conveyor belt; as well asa reading device (16, 24) for the address, said reading device in turn being connected to the address detector;a time measuring member (19) connected with the signal processing system for the reference mark detection system;a measuring system (IV) for determining the temperature of the belt and the ambient temperature;another measuring system (V) for determining the tractive force of the belt, anda process computer (20) for the purpose of evaluating all data, whereby the process computer (21) is in turn connected to a drive control.