Abstract:
An elevator load bearing member (30) monitoring device includes a controller (42) that applies a selected electrical signal to tension members (32) of the load bearing member (30). In one example, connectors (40) are associated with ends of the load bearing member (30) to establish an electrical interface between the controller (42) and the tension members (32). The connectors (40) facilitate establishing electrical circuit loops along the tension members (32) such that only non-adjacent tension members are energized at a selected time. A variety of circuit configurations are disclosed. The applied electrical signal in one example has a potential that is negative compared to a ground potential of a hoistway in which the elevator belt is used. In another example, the electrical signal comprises a plurality of pulses and has a duty cycle that is on the order of about one percent.
Abstract:
An elevator sheave (20) includes a belt guiding surface (26) having a surface profile along at least a portion of the belt guiding surface. The surface profile preferably is defined by an n th order polynomial equation where n is a number greater than 2. In one example, the reference point (40) is a central point along the width of the belt guiding surface (26). In one example, a central portion (42) of the surface profile preferably is aligned to be generally parallel with the central axis (34) of the sheave body. Some examples have curvilinear side portions (44, 46) between the central portion (42) and the edges (28, 30) of the sheave. Other examples also include second side portions (48, 50) that have linear profiles.
Abstract:
A system (100) and method monitoring the health of a support structure (104) for an elevator (102) based on an electrical characteristic (110), such as resistance, of the support structure and not the temperature(108) of the structure. The resistance of a virgin support structure (104) under the same temperature conditions as the support structure (104) being monitored is calculated (204) and subtracted from the measured resistance of the monitored support structure (104). The resistance value of the virgin support structure and the monitored support structure may be translated (112) to a reference temperature to simplify calculations and monitoring of the support structure.
Abstract:
An electrical connector device (40) for use with an elevator load bearing member (30) assembly includes at least one electrical connector member (42) for making electrically conductive contact with at least one tension member (32). A clamping member (45) supports the electrical connector member and facilitates manipulating the connector member to pierce through a coating (34) over the tension members (32). The clamping member (45) in one example has first (46) and second (48) portions received on opposite sides of the load bearing member (30). An adjuster (50) facilitates adjusting the relative positions of the clamping member portions to urge the electrical connector member through the coating and into electrically conductive contact with the tension member.
Abstract:
A method and system for detecting or measuring defects in a rope having ferromagnetic tension members includes a magnetic field exciter and an array of magnetic flux sensors corresponding to the tension members in a known relationship. Measurements of magnetic flux leakage are indicative of defects. Another aspect of the invention includes a method and system for detecting or measuring defects in an elevator rope having electrically conductive tension members, whereby measured electrical resistance in the tension members is indicative of defects.
Abstract:
PROBLEM TO BE SOLVED: To provide a system and method for monitoring soundness of a support structure for an elevator based on electrical characteristics of the support structure such as resistance, not based on a temperature of the structure. SOLUTION: Resistance of an unused support structure under the same temperature condition as the monitored support structure is calculated, and is subtracted from a measured resistance of the monitored support structure. Resistance values of the unused support structure and the monitored support structure can be converted based on a reference temperature so as to simplify calculation and monitoring of the support structure. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a device for detecting a defect or the deterioration of an elevator rope. SOLUTION: The method and the system for detecting, that is, measuring defects of the rope equipped with a ferromagnetic tensile member include both a magnetic field generator and a magnetic flux sensor array associated with the tensile member in a known relationship. Any defect is indicated by the measurement of leakage flux. The other embodiment relates to the method and the system for detecting the defect of the elevator rope having a conductive tensile member, that is, for measuring the defect, and shows the defect by suing the measured value of the electric resistance of the tensile member. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
Induktiver Leistungskoppler (32), aufweisend: eine Primärspule (86), die um einen quaderförmigen Ferritkern (87), der eine Breite (W), eine Länge (L) und eine Dicke (T) aufweist gewickelt ist; und eine Sekundärspule (71), die um einen quaderförmigen Ferritkern (72) gewickelt ist, der dieselbe Breite (W), dieselbe Länge (L) und dieselbe Dicke (T) wie der quaderförmigen Ferritkern aufweist, um den die Primärspule (86) gewickelt ist; wobei der Ferritkern (87) der Primärspule (86) von dem Ferritkern (72) der Sekundärspule (71) durch einen Luftspalt (S) entlang der Richtung der Dicke (T) der Ferritkerne (72, 87) getrennt ist, und wobei die Primärspule (86) zu der Sekundärspule (71) parallel angeordnet ist, wobei die Breite (W) und die Länge (L) der beiden Ferritkerne (72, 87) zwischen zweimal und zehnmal größer als der Luftspalt (S) sind und die Dicke (T) 5% bis 25% der Breite (W) der beiden Ferritkerne (72, 87) ist.
Abstract:
Una polea para uso en un sistema de ascensor, que comprende: un cuerpo de polea (22) que tiene un eje central (34) y una superficie guiadora de la correa (26) que incluye un perfilde superficie que se extiende en una dirección axial a lo largo de por lo menos una porción de la superficie guiadorade la correa (26) caracterizado porque el perfil de superficie es por lo menos parcialmente convexo según loobservado en un corte transversal radial de la polea, donde el perfil de superficie tiene una porción central (42),primeras porciones laterales (44, 46) que se extienden fuera de bordes opuestos de la porción central (42) haciabordes correspondientes de la polea y segundas porciones laterales (48, 50) que se extienden fuera de las primerasporciones laterales (44, 46) hacia los bordes correspondientes de la polea, donde la porción central (42) tiene unaalineación paralela con el eje central de la polea (34), las primeras porciones laterales (44, 46) tienen un perfilcurvado y las segundas porciones laterales (48, 50) tienen un perfil lineal.