Nondestructive testing of a carrier element of an elevator installation
AssigneeInventio AG
InventorsJosef Husmann, Guntram Begle
Life of this patent
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Abstract
A testing device includes a receiving unit for electromagnetic signals arranged on a carrier element to be tested to generate test data from received electromagnetic radiation. The test data are evaluated in a processing system to determine a deviation of the test data from a nominal state of the carrier element. The testing device is used to test a carrier element of an elevator installation on which the elevator car is suspended.
Claims15
A method for testing at least one carrier element of an elevator installation in which the carrier element carries an elevator car, wherein the carrier element is a sheathed carrier element, comprising the following steps:
- activating a transmission unit ‘for emitting electromagnetic’ radiation directed at the carrier element;
- activating a reception unit for receiving the electromagnetic radiation to generate test data representing a current state of the carrier element from the received electromagnetic radiation;
- evaluating the test data in a calculation unit to determine a deviation of the test data from reference data representing an intended state of the carrier element, wherein the reception unit is responsive to electromagnetic radiation with a wavelength in a range of between 90 μm and 120 μm;
- generating from the calculation unit an output signal representing the determined deviation to at least one of present a visual display and control a drive unit driving the carrier element of the elevator installation;
- and
- including at least one of:
- rotating or swiveling the transmission unit about the carrier element between at least two positions to scan the carrier element from at least two sides;
- rotating or swiveling the at least one reception unit about the carrier element between at least two positions to scan the carrier element from at least two sides;
- and
- arranging at least two of the reception units around the carrier element to scan the carrier element from different sides.
A method for testing at least one carrier element of an elevator installation in which the carrier element carries an elevator car, wherein the carrier element is a sheathed carrier element, comprising the following steps:
- activating a transmission unit for emitting electromagnetic radiation directed at the carrier element;
- activating a reception unit for receiving the electromagnetic radiation to generate test data representing a current state of the carrier element from the received electromagnetic radiation;
- evaluating the test data in a calculation unit to determine a deviation of the test data from reference data representing an intended state of the carrier element, wherein the reception unit is responsive to electromagnetic radiation with a wavelength in a range of between 90 μm and 120 μm;
- generating from the calculation unit an output signal representing the determined deviation to at least one of present a visual display and control a drive unit driving the carrier element of the elevator installation, wherein the reception unit receives the electromagnetic radiation as test radiation that at least one of extends parallel to a transmission axis passing through the carrier element and, starting from the carrier element, is reflected along at least one reflection axis, and wherein the test data are transmission patterns and reflection patterns respectively, the calculation unit evaluating the patterns to detect surface changes on the carrier element;
- and
- including at least one of:
- monitoring a diameter of the carrier element to establish a reduction or widening of the carrier element representing internal errors of wires, strands or fibers of the carrier element;
- and
- generating reflection patterns of the carrier element for the electromagnetic radiation transmitted along the reflection axis to establish axial stretches in the reflection pattern representing internal errors of wires, strands or fibers of the carrier element.
A device for testing a carrier element of an elevator installation in which the carrier element carries an elevator car, wherein the carrier element includes a sheath, comprising:
- a transmission unit for emitting electromagnetic test radiation directed at the carrier element;
- a reception unit for receiving the electromagnetic test radiation directed at the carrier element, wherein the reception unit generates test data representing the received electromagnetic test radiation with a wavelength in a range of between 90 μm and 120 μm;
- a calculation unit coupled to the reception unit for evaluating the test data to determine a deviation of the test data from reference data representing an intended state of the carrier element and for generating an output signal representing the determined deviation to at least one of a visual display and a control unit driving the carrier element;
- and
- including at least one of:
- an assembly device for rotating or swiveling the transmission unit about the carrier element between at least two positions to scan the carrier element from at least two sides;
- an assembly device for rotating or swiveling the at least one reception unit about the carrier element between at least two positions to scan the carrier element from at least two sides;
- and
- at least two of the reception units arranged around the carrier element to scan the carrier element from different sides.
Dependencies are inferred from the claim text.