JP7289360B2 - elevator system - Google Patents

Description

The present invention relates to elevator systems.

An elevator having a car that ascends and descends in a hoistway is generally controlled to determine whether or not there is a car in a door zone indicating a position where passengers can get on and off. For example, a detection sensor installed at the top or bottom of the car detects a detection target installed at each floor position in the hoistway to detect the door zone.

If any abnormality occurs in the detection sensor or the object to be detected, it may cause an accident such as the door of the car not opening in the door zone or the door opening outside the door zone. Therefore, functions such as detecting an abnormality in a detection sensor or an object to be detected and suspending operation of an elevator are important for safety.

As an example of ensuring the safety of elevators, there is a technique described in Patent Literature 1, for example. In Patent Document 1, although a floor detection circuit for detecting a floor position of a car detects movement of the car for two floors, when a detection sensor does not detect an object to be detected, , the detection sensor or the object to be detected is judged to be abnormal.

Japanese Patent Application Laid-Open No. 2018-2387

In Patent Document 1, when a period occurs during which communication is not possible between a floor detection circuit that detects the current floor of a car and a position detector failure judgment circuit that judges the failure of a position detector, that period is , there is a problem that even if an abnormality occurs in the detection sensor and the object to be detected, it cannot be detected.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an elevator system capable of retroactively detecting an abnormality of a detection sensor or an object to be detected that occurred during a period when an abnormality occurred in a communication means after communication was restored to normal. It is in.

In order to achieve the above object, the present invention provides a car that ascends and descends in a hoistway, a detection sensor provided in the car, and an object to be detected that is installed in the hoistway and detected by the detection sensor. and calculating the position of the car from the encoder that outputs a signal according to the elevation of the car, the position of the detected object installed on each floor, and the signal of the encoder. and storing a control controller that stores the position of the car from the calculated predetermined time to the present, and a log of the detected state of the detected object detected by the detection sensor from the predetermined time to the present, a car controller for transmitting a detection state of the detectable object to the control controller, wherein the control controller logs the detection state of the detectable object when a communication abnormality occurs with the car controller; Abnormality of the detection sensor or the object to be detected during occurrence of an abnormality in communication is determined based on the log of the position information of the car and the information of the position of the object to be detected installed on each floor.

According to the present invention, it is possible to provide an elevator system capable of retroactively detecting an abnormality of a detection sensor or an object to be detected that occurred during a period when an abnormality occurred in a communication means after communication was restored to normal. can.

1 is an overall configuration diagram of an elevator system according to an embodiment of the present invention; FIG. FIG. 2 is a diagram showing configurations of a car controller 11 and a control controller 14 according to an embodiment of the present invention; 4 is a flow chart showing the processing contents of the car controller 11 according to the embodiment of the present invention; 4 is a flow chart showing processing contents of the controller 14 according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Similar components are denoted by similar reference numerals, and similar descriptions are not repeated.

The various constituent elements of the present invention do not necessarily have to be independent entities, and one constituent element may consist of a plurality of members, a plurality of constituent elements may consist of one member, a certain constituent element may part of a component, part of one component overlaps part of another component, and so on.

FIG. 1 is an overall configuration diagram of an elevator system according to an embodiment of the present invention. The elevator system in this embodiment is a so-called tube-type elevator system in which a car 1 and a counterweight 2 are connected by a main rope 3 . A motor 4 rotationally drives a sheave on which a main rope 3 is hung, so that the car 1 ascends and descends in the hoistway. The motor 4 is provided in a machine room above the hoistway.

The motor 4 is provided with a hoisting machine brake 5 , and the operation of the hoisting machine brake 5 prevents the rotation of the motor 4 . As a result, the car 1 stops.

The governor rope 6 is pulled as the car 1 is raised and lowered, and rotates the governor 7. - 特許庁The governor 7 is provided with an encoder 8, and the encoder 8 rotates together with the governor 7 to generate a pulse signal. That is, the encoder 8 outputs a signal according to the elevation of the car.

A detection sensor 9 is provided on the upper part of the car 1 and detects an object to be detected 10 installed at each floor FL in the hoistway. The object 10 to be detected is installed so that the detection sensor 9 is positioned at the center of the object 10 in the vertical direction when the car 1 is stopped without landing deviation.

The detection sensor 9 is connected to a car controller 11 provided in the car 1, and the car controller 11 determines whether or not the detection sensor 9 detects the object 10 to be detected. Further, the car controller 11 transmits the detection state of the detection sensor 9 to the control controller 14 via the car-side wireless terminal 12 and the control panel-side wireless terminal 13 . The control controller 14 is provided in the machine room.

The controller 14 determines whether or not the car 1 is at the floor position from the detection state of the detection sensor 9 received from the car controller 11 . Further, the controller 14 uses pulse signals from the encoder 8 to calculate the position and speed of the car 1 . The controller 14 outputs operation commands to the motor 4 and the hoisting machine brake 5 based on these pieces of information, thereby controlling the ascending/descending operation of the car 1 .

The car controller 11 and the control controller 14 constantly monitor the soundness of communication through health checks. It can be detected as a communication error.

FIG. 2 is a diagram showing configurations of the car controller 11 and the control controller 14 according to the embodiment of the present invention.

The car controller 11 has a detection determination section 201 and an intra-car controller communication determination section 202 .

The detection determination unit 201 determines the detection state of the detection sensor 9 (whether or not the detection object 10 is being detected). The intra-car controller communication determination unit 202 determines whether communication with the controller 14 is normal.

Further, the car controller 11 stores the detection state of the detection sensor 9 in the detection state memory 203 when the intra-car-controller communication determination unit 202 detects a communication abnormality. The car controller 11 stores the detection state of the detected object 10 by the detection sensor 9 from the present to a predetermined time ago. The detected state memory 203 of the car controller 11 can store information about a plurality of detected states such as "currently detected state", "detected state 1 ms ago", and "detected state 2 ms ago". It has a lot of areas to do.

The controller 14 has a car position calculator 204 , an intra-controller communication determiner 205 , and a detection abnormality determiner 206 .

The car position calculator 204 calculates the position of the car 1 in the hoistway using the pulse signal from the encoder 8 .

The intra-controller communication determination unit 205 determines whether communication with the car controller 11 is normal. The detection abnormality determination unit 206 determines abnormality (hereinafter referred to as detection abnormality) of the detection sensor 9 or the detected object 10 using the signal received from the car controller 11 .

Further, the control controller 14 has an intra-controller memory 207 , and the intra-controller memory 207 is composed of a floor position memory 208 and a car position memory 209 .

In the floor position memory 208, when the elevator system is started up or adjusted, the elevator car 1 is moved from the lowest floor to the highest floor at a low speed, and the detection sensor 9 detects the lower end of the object 10 to be detected. A car position calculated value (with the lower end of the detected object 10 on the lowest floor set to 0) is stored for each floor. That is, the position when the detection sensor 9 detects the lower end of the object to be detected 10 is calculated by the pulse signal of the encoder 8, and the calculated value is stored in the floor position memory 208 as a car position calculation value. The floor position memory 208 stores the position (lower end position) of the detected object 10 on each floor.

Further, the controller 14 stores the calculated car position value in the car position memory 209 when the intra-controller communication determination unit 205 detects a communication abnormality.

The controller 14 calculates the position of the car 1 from the signal (pulse signal) of the encoder 8 and stores the calculated position of the car 1 from the present to a predetermined time ago. The car position memory 209 of the controller 14 can store information about a plurality of car positions such as "current car position", "1 ms front car position", and "2 ms front car position". It has many areas for storing information.

Next, processing when an abnormality occurs in the elevator system will be described with reference to FIGS. 3 and 4. FIG.

FIG. 3 is a flow chart showing the processing contents of the car controller 11 according to the embodiment of the present invention. FIG. 4 is a flow chart showing the processing contents of the controller 14 according to the embodiment of the present invention.

The flows of FIGS. 3 and 4 are periodically executed. In this embodiment, the period is 1 ms. Each processing step will be described below. First, the processing contents of the car controller 11 will be described with reference to FIG.

Step S301: The intra-car-controller communication determination unit 202 determines whether communication with the controller 14 is abnormal. If the communication is abnormal (Yes), the process moves to step 302 , and if the communication is not abnormal (No), the process moves to step 303 .

Step S302: The car controller 11 stores the detection state of the detection sensor 9 determined by the detection determination section 201 in the detection state memory 203 as the "current detection state". If the "current detection state" already stores the information of the detection state of one period before (that is, 1 ms ago), the information is simultaneously moved to the "detection state of 1 ms ago". Similarly, all the detection states stored in "(N) ms previous detection state" are moved to "(N+1) ms previous detection state" (N is a natural number). Therefore, the detection state memory 203 stores a log of the detection state of the detected object 10 from the occurrence of the communication abnormality to the present. After step S302, the flow ends.

Step S<b>303 : The car controller 11 transmits information on the detection state of the detection sensor 9 determined by the detection determination unit 201 to the control controller 14 . After that, the process moves to step S304.

Step S304: The car controller 11 determines whether or not the detection state memory 203 stores detection state information. If the detection state information is stored (Yes), the process proceeds to step S305, and if the detection state information is not stored (No), this flow ends.

Step S<b>305 : The car controller 11 transmits all the detected state information stored in the detected state memory 203 to the control controller 14 . The information to be transmitted is arranged in order from the current detection state so that the controller 14 can determine how many milliseconds ago the information of each detection state was detected. After that, the process moves to step S306. In step S305, when a communication abnormality occurs, the detection state of the detected object 10 from a predetermined time before the detection sensor 9 to the present is stored, starting from the time when the communication abnormality occurred, and the communication abnormality is resolved. If so, the stored detection state of the detected object 10 is transmitted to the controller 14 .

Step S306: The car controller 11 clears (deletes) all the logs related to the detected state stored in the detected state memory 203. FIG. After that, this flow ends.

Next, the processing contents of the controller 14 will be described with reference to FIG.

Step S401: The intra-controller communication determination unit 205 determines whether or not communication with the car controller 11 is abnormal. If the communication is abnormal (Yes), the process moves to step S402, and if the communication is normal (No), the process moves to step S405.

Step S402: The controller 14 stores information on the car position calculated by the car position calculator 204 in the car position memory 209 as "current car position". If the "current car position" has already stored information on the car position one cycle before (that is, 1 ms ago), it is simultaneously moved to the "car position 1 ms ago". Similarly, all the detection state information stored in "(N) ms front car position" is moved to "(N+1) ms previous detection state" (N is a natural number). Therefore, the car position memory 209 stores a log of car positions from the occurrence of the communication abnormality to the present. After step S402, the process proceeds to step S403.

Step S403: Based on the pulse signal from the encoder 8, the controller 14 determines whether the car 1 is running. If the car 1 is running (Yes), the process proceeds to step S404, and if not (No), this flow ends.

Step S404: The controller 14 slows down the rotational speed of the motor 4 to gradually decelerate and stop the car 1 . In the event of a communication error, the car stops running for safety. However, in order to minimize the anxiety given to passengers, the car 1 is not stopped suddenly, but is stopped after gradually decelerating. After stopping, stop the operation of the elevator. After step S404, the flow ends.

Step S405: The detection abnormality determination unit 206 determines the detection state of the detected object 10 received from the car controller 11, the current position of the car 1, and the detected object 10 on each floor stored in the floor position memory 208. Based on the position (lower end position), it is determined whether there is an abnormality in the detection sensor 9 or the detected object 10 . Specifically, when the current car position is between the lower end position of the object 10 to be detected on any floor and the position higher by the length of the object 10 to be detected, the detection sensor 9 detects the object 10 to be detected. It is determined that there is an abnormality in the detection sensor 9 or the detected object 10 if it is not detected and if it is detected when the position of the car is outside the above range. If it is determined that the detection is abnormal (Yes), the process proceeds to step S406, and if the detection is not abnormal (No), the process proceeds to step S407.

Step S406: When it is determined that the detection sensor 9 or the object to be detected 10 is abnormal, the controller 14 slows down the rotation speed of the motor 4 to gradually decelerate and stop the car 1 . After stopping, stop the operation of the elevator. After step S406, the flow ends.

Step S<b>407 : The controller 14 determines whether or not the log of the detected state information stored in the detected state memory 203 (transmitted in step S<b>305 ) has been received from the car controller 11 . If it has been received (Yes), the process proceeds to step S408, and if it has not been received (No), this flow ends.

Step S<b>408 : The detection abnormality determination unit 206 detects the detection state log received from the car controller 11 , the car position information log stored in the car position memory 209 , and the information for each floor stored in the floor position memory 208 . Based on the information on the lower end position of the detected object 10, the abnormality of the detection sensor 9 or the detected object 10 during the occurrence of the communication abnormality is determined. In step S405, the detection state is replaced with "(N) ms previous detection state" and the car position is replaced with "(N) ms previous car position" (N is a natural number). to implement. If any log is determined to be abnormal (Yes), the process moves to step S409, otherwise (No), the process moves to step S410.

Step S409: The controller 14 slows down the rotational speed of the motor 4 to gradually decelerate and stop the car 1 . After stopping, stop the operation of the elevator. After step S409, the process moves to step S411.

Step S410: The control controller 14 resumes operation of the elevator. When this step is reached, a communication abnormality has been detected up to one cycle before, and at this time, the controller 14 has stopped the operation of the elevator in step S404. Since it is determined in steps S405 and S408 that no detection abnormality has occurred at present or during communication abnormality, operation of the elevator is restarted. After step S410, the process proceeds to step S411.

Step S<b>411 : The controller 14 erases (clears) all the logs of the car position information stored in the car position memory 209 . After that, this flow ends.

As described above, in the present embodiment, an abnormality in communication and sensors is detected and the car is placed in a dormant state. In this way, when communication is abnormal, the car controller 11 stores a log of detection state information in the detection state memory 203 (step S302), and the control controller 14 stores a log of car position information in the car position memory. (Step S402) After the communication returns to normal, the controller 14 uses these to determine the detection abnormality (Step S408), so that the detection abnormality during the communication abnormality can be found.

It should be noted that the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to those having all the configurations described. For example, although the encoder 8 is provided in the governor 7, it may be provided in the motor 4 as well.

DESCRIPTION OF SYMBOLS 1... Car 4... Motor 8... Encoder 9... Detection sensor 10... Object to be detected 11... Car controller 14... Control controller 201... Detection determination part 202... Communication determination part in car controller 203 Detected state memory 204 Car position calculator 205 Intra-controller communication determination unit 206 Detection abnormality determiner 208 Floor position memory 209 Car position memory

Claims (8)

An elevator system comprising a car that ascends and descends in a hoistway, a detection sensor provided in the car, and an object to be detected that is installed in the hoistway and detected by the detection sensor,
an encoder that outputs a signal according to the elevation of the car;
a control controller that calculates the position of the car from the position of the object to be detected installed on each floor and the signal of the encoder, and stores the calculated position of the car from a predetermined time ago to the present;
a car controller that stores a log of the detection state of the detected object detected by the detection sensor from a predetermined time ago to the present, and transmits the detection state of the detected object to the control controller;
When a communication error occurs with the car controller, the controller provides a log of the detection state of the detectable object, a log of the position information of the car, and a log of the position of the detectable object installed on each floor. An elevator system, wherein an abnormality of said detection sensor or said object to be detected is determined based on information during occurrence of a communication abnormality. In claim 1,
An elevator system, wherein the car is stopped when there is an abnormality in the detection sensor or the object to be detected. In claim 1,
When a communication abnormality with the control controller occurs, the car controller stores the detection state of the detected object detected by the detection sensor from the present to a predetermined time ago, and when the communication abnormality is resolved , An elevator system, wherein the stored detected state of the object to be detected is transmitted to the controller. In claim 3,
The elevator system, wherein the car controller deletes the stored log regarding the detection state of the detectable object after transmitting the stored detection state of the detectable object to the control controller. In claim 1,
Based on the detection state of the detectable object received from the car controller, the current position of the car, and the position of the detectable object installed on each floor, the controller detects the detection sensor or detects the detectable object. An elevator system characterized by determining an abnormality in the In claim 3,
The controller determines whether or not a log of the detection state of the object to be detected has been received from the car controller,
An elevator system according to claim 1, wherein an abnormality of said detection sensor or said object to be detected during a communication abnormality is determined when a log of the detection state of said object to be detected is received. In claim 6,
An elevator system, wherein the car is stopped when there is an abnormality in the detection sensor or the object to be detected. In claim 7,
The elevator system, wherein the control controller erases the stored log of the location information of the car after the car stops.

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