Monitoring a suspension and traction means of an elevator system
AssigneeInventio AG
InventorsOliver Berner, Micro Annen
Life of this patent
Estimating the term…
Abstract
A monitoring device for a suspension-and-traction apparatus of an elevator system that includes at least one electrically conductive cord contains a measurement apparatus for determining a resulting resistance. The measurement apparatus is connected to the cord with contacting elements contacting opposite ends of cord. Damage to the suspension-and-traction apparatus is detected by a contact point that can register protruding conductive parts of the cord and, in another embodiment, the contacting elements each contain a plurality of mutually differing resistance elements such that each of at least two electrically conductive cords of the suspension-and-traction apparatus is connected to the monitoring device through two of the resistance elements.
Claims14
A monitoring device for a suspension-and-traction means of an elevator system, which suspension-and-traction means contains at least one cord that is electrically conductive, comprising:
- a measurement apparatus for determining a resulting electrical resistance, and first and second contacting elements electrically connecting the measurement apparatus to the at least one cord of the suspension-and-traction means, wherein the first contacting element contacts a first end of the at least one cord, and the second contacting element contacts a second end of the at least one cord;
- and
- a resistor electrically connected to the measurement apparatus and to a contact point over which the suspension-and-traction means runs so that the monitoring device detects a contact of the contact point with the at least one cord of the suspension-and-traction means, and wherein the first and the second contacting elements each contain at least one resistor, so that the at least one cord of the suspension-and-traction means is electrically connected via the resistors of the contact elements to the measurement apparatus.
An elevator system having a suspension-and-traction means containing at least two cords that are electrically conductive, and a monitoring device having a measurement apparatus for determining a resulting electrical resistance and which, via a first contacting element for contacting a first end of the suspension-and-traction means and a second contacting element for contacting a second end of the suspension-and-traction means, is electrically connected to the at least two cords, comprising:
- the monitoring device containing a first resistor electrically connected to the measurement apparatus and to a contact point over which the suspension-and-traction means runs, and wherein the measurement apparatus detects an electrical contact of the contact point with the at least two cords;
- and
- ends of the at least two cords each contain at least one resistor whereby the at least two cords are electrically connected by associated ones of the resistors to the measurement apparatus.
A method for monitoring a suspension-and-traction means in an elevator system comprising the steps of:
- a. applying a test current to a test circuit connected to opposite ends of an electrically conductive cord of the suspension-and-traction means;
- b. measuring at least one electric current characteristic of the test current with a measurement apparatus connected to the opposite ends and to a resistor and a contact point over which the suspension-and-traction means runs and determining a resulting resistance data, the data including detection of contact of the contact point with the cord;
- c. electronic processing the data determined by the measurement apparatus with a processor;
- and
- d. issuing a graded warning message or a shutdown of the elevator system from the processor when the processed data indicates damage to the suspension-and-traction means.
Dependencies are inferred from the claim text.