Movement-monitoring system of an elevator installation

Patent metadata

Field	Value
Publication number	US-9926170-B2
Application number	US-201314439264-A
Country	US
Kind code	B2
Filing date	Oct 22, 2013
Priority date	Oct 30, 2012
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

In an elevator installation, an elevator car is movably arranged alongside guide rails and the elevator car is equipped with a brake system with preferably two safety brakes. A movement monitoring system monitors the movement parameters of the elevator car and triggers corresponding warnings or safety measures, if permissible threshold values are exceeded or it provides determined adjusted movement parameters to an elevator control. The movement monitoring system determines a first movement parameter in a time interval and detects an acceleration of the elevator car. The movement monitoring system determines the time interval for determining the adjusted movement parameter as a function of the detected acceleration.

First claim

The invention claimed is:

1. A movement monitoring system for monitoring a movement of an elevator car in an elevator shaft of an elevator installation comprising:
a first movement detection module; and
a first acceleration sensor for detecting a first acceleration of the elevator car, wherein the first movement detection module sets a first time interval as a function of the detected first acceleration of the elevator car;
wherein the first movement detection module determines a first adjusted movement parameter of the elevator car in the first time interval and provides the first adjusted movement parameter to an elevator control for controlling movement of the elevator car.

2. The movement monitoring system according to claim 1 wherein the first movement detection module determines a first preliminary movement parameter in different time intervals, saves the first preliminary movement parameter determined at the different time intervals in a memory and for determining the first adjusted movement parameter determines the first time interval as a function of the detected first acceleration, reads the saved first preliminary movement parameter that corresponds to the first time interval from the memory, and defines the read first preliminary movement parameter as the first adjusted movement parameter, or reads the first preliminary motion parameter that corresponds to the first time interval from the memory and calculates the first adjusted movement parameter from the read first preliminary movement parameter.

3. The movement monitoring system according to claim 1 including a second movement detection module for determining a second adjusted movement parameter of the elevator car in a second time interval, wherein the second movement detection module determines the second time interval as a function of the detected first acceleration, or determines the second time interval as equal to the first time interval, or determines the second time interval as a function of a second acceleration of the elevator car detected by a second acceleration sensor.

4. The movement monitoring system according to claim 3 wherein the first and second adjusted movement parameters determined by the first and second movement detection modules are respectively at least one of first and second travel speeds of the elevator car, first and second paths of the elevator car, and first and second positions of the elevator car in the elevator shaft, and the first and second movement detection modules each include at least one sensor for detecting the travel speed, the path or the position of the elevator car as required.

5. The movement monitoring system according to claim 4 wherein the first and second sensors for detecting the first and second positions of the elevator car in the shaft each receive a magnetic, an optical, an acoustic or an electrical signal and the first or second sensors for detecting the first and second positions cooperate with correspondingly configured signal generators, signal carriers or signal reflectors.

6. The movement monitoring system according to claim 3 wherein the movement monitoring system at least one of passes on at least one of the first and second adjusted movement parameters to the elevator control and compares at least one of the first and second adjusted movement parameters with at least one threshold value and, if the threshold value is exceeded, triggers a security or safety measure for the elevator installation.

7. The movement monitoring system according to claim 3 wherein the first movement detection module and the first acceleration sensor form a first functional group, the second movement detection module and the second acceleration sensor form a second functional group and the movement detection system compares at least a first signal detected or determined by the first movement detection module in the first functional group as the first adjusted movement parameter, the first acceleration or an intermediate result of the first movement detection module with a second signal that was detected or determined by the second movement detection module in the second functional group, which second signal is of a same type as the first signal, as the second adjusted movement parameter, the second acceleration or an intermediate result of the second movement detection module, and the movement monitoring system issues a warning level signal if differences between the first signal and the second signal are found.

8. The movement monitoring system according to claim 7 wherein the first and the second functional groups each compare the first and second signals of the other functional group with the second and first signals of the same type with those of its own functional group and both functional groups issue the warning level signal if a difference is found.

9. The movement monitoring system according to claim 7 wherein the issuance of the warning level signal causes the elevator car to stop after a current travel command or impending travel course has been properly completed.

10. The movement monitoring system according to claim 6 wherein the safety measure causes at least one of an interruption of a safety circuit of the elevator installation and accordingly a stopping of the elevator car by a normal operation and an activation of an emergency brake whereby the elevator car stops in case of a failure of the stopping by the normal operation.

11. The movement monitoring system according to claim 3 wherein the movement monitoring system activates an emergency brake device for the elevator car if the first or second acceleration value detected by the first or second acceleration sensor respectively exceeds an acceleration value.

12. An elevator installation with an elevator car for the transport of persons or goods in an elevator shaft, wherein to monitor the movement of the elevator car, the elevator installation includes a movement monitoring system according to claim 1 .

13. A method of monitoring movement of an elevator car in an elevator shaft comprising the steps of:
detecting a first acceleration of the elevator car;
determining a first time interval as a function of the detected first acceleration or travel information of the elevator car;
determining a first adjusted movement parameter in the first time interval; and
providing the first adjusted movement parameter to an elevator control for controlling movement of the elevator car.

14. The method for monitoring the movement the elevator car according to claim 13 including:
determining a first preliminary movement parameter at different time intervals;
saving the first preliminary movement parameter at different time intervals;
to determine the first adjusted movement parameters, determining the first time interval as a function of the detected acceleration; and
determining as the first adjusted movement parameter the first preliminary movement parameter corresponding to the first time interval, or
calculating and determining the first adjusted movement parameter from the first preliminary parameter corresponding to the first time interval.

Assignees

• Inventio Ag

Inventors

• Michel David
• Birrer Eric
• Müller Rudolf J
• Geisshüsler Michael

Classifications

• B66B5/06 Primary

  electrical · CPC title

• G01D5/142

  using Hall-effect devices (measuring magnetic variables using Hall-effect or other galvanomagnetic devices G01R33/06) · CPC title

• B66B1/3407 Primary

  Setting or modification of parameters of the control system · CPC title

• G01P15/00

  Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration · CPC title

• G05B15/02

  electric · CPC title