CN114555506B - elevator system - Google Patents

Abstract

Equipped with: the detection sensor (9) of the car (1), the object to be detected (10) detected by the detection sensor (9), the encoder (8) that outputs a signal according to the lift of the car (1), and the The position of the detected object (10) on each floor and the signal of the encoder (8) are used to calculate the position of the car (1) and store the calculated position of the car (1) from a predetermined time ago to the present. device (14), stores the log of the detection state of the object (10) detected by the detection sensor (9) from a predetermined time ago to the present, and sends the detection state of the object (10) to the controller (14) car controller (11). When the controller (14) has a communication abnormality with the car controller (11), based on the log of the detection status of the detected object (14), the log of the position information of the car (1), and setting The position information of the detected object (10) in each layer is used to determine the abnormality of the detection sensor (9) or the detected object (10) during the occurrence of communication abnormality.

Description

elevator system

technical field

The present invention relates to an elevator system.

Background technique

In an elevator having a car that moves up and down in the hoistway, it is generally controlled to determine whether there is a car in a door-openable area indicating a position where passengers can get on and off the elevator. For example, the detection sensor installed on the upper or lower portion of the car detects the object to be detected installed at each floor position in the hoistway to detect the door-openable area.

When some abnormality occurs in the detection sensor or the object to be detected, it may cause an accident that the car door does not open in the door-openable area or the car door opens outside the door-openable area. Therefore, functions such as stopping the operation of the elevator upon detection of an abnormality in the detection sensor or the object to be detected are important in terms of safety.

As an example of securing the safety of an elevator, there is a technique described in Patent Document 1, for example. In Patent Document 1, although the floor detection circuit that detects the floor position of the car detects that the car has moved two floors, if the detection sensor does not detect the object to be detected, the detection sensor or the object to be detected is judged to be abnormal. .

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2018-2387

Contents of the invention

The problem to be solved by the invention

In Patent Document 1, there is a problem that when there is a period in which communication is impossible between the floor detection circuit that detects the current floor of the car and the position detector failure determination circuit that performs failure determination of the position detector, even if the car is detected during this period, Even if an abnormality occurs in the sensor or the object to be detected, the abnormality cannot be detected.

An object of the present invention is to provide an elevator system capable of retroactively detecting an abnormality in a detection sensor or an object to be detected that occurred while a communication unit was abnormal after communication was restored to normal.

means to solve the problem

In order to achieve the above object, the present invention provides an elevator system, which includes: a car that moves up and down in the elevator passage, a detection sensor installed on the car, and a detection sensor installed in the elevator passage to be detected by the detection sensor. The object to be detected, the elevator system is characterized by having: an encoder that outputs a signal according to the lift of the car; a controller that outputs a signal according to the position of the object to be detected on each floor and the code The position of the car is calculated from the signal of the sensor, and the calculated position of the car from the predetermined time ago to the present is stored; and the car controller stores the position detected by the detection sensor from the predetermined time A log of the detected state of the detected object up to now, the detected state of the detected object is sent to the controller, and the controller communicates with the car controller In the case of an abnormality, it is determined that all communication abnormalities occurred during the communication abnormality based on the log of the detected state of the detected object, the log of the position information of the car, and the position information of the detected object installed on each floor. abnormality of the detection sensor or the object to be detected.

Invention effect

According to the present invention, it is possible to provide an elevator system capable of retrospectively detecting an abnormality of a detection sensor or a detected object that occurred while the communication unit was abnormal after the communication was restored to normal.

Description of drawings

Fig. 1 is an overall configuration diagram of an elevator system according to an embodiment of the present invention.

Fig. 2 shows the structures of the car controller 11 and the controller 14 according to the embodiment of the present invention.

Fig. 3 is a flowchart showing the processing contents of the car controller 11 according to the embodiment of the present invention.

FIG. 4 is a flowchart showing the processing contents of the controller 14 according to the embodiment of the present invention.

Detailed ways

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are assigned to the same structural elements, and the same description will not be repeated.

The various constituent elements of the present invention do not necessarily need to exist independently, and it is allowed that one constituent element is composed of multiple components, multiple constituent elements are composed of one component, a certain constituent element is a part of other constituent elements, and a certain constituent element A portion overlaps with a portion of another constituent element, etc.

Fig. 1 is an overall configuration diagram of an elevator system according to an embodiment of the present invention. The elevator system of the present embodiment is a so-called bucket elevator system in which the car 1 and the counterweight 2 are connected by the main rope 3 . The motor 4 rotates and drives the pulley on which the main rope 3 is suspended, so that the car 1 moves up and down in the hoistway. The motor 4 is arranged in the machinery room on the upper part of the lifting passage.

The electric motor 4 is provided with a hoist brake 5, and the rotation of the electric motor 4 is prevented by the operation of the hoist brake 5. As a result, car 1 stops.

The governor rope 6 is pulled along with the raising and lowering of the car 1 to rotate the governor 7 . The speed governor 7 includes an encoder 8 , and the encoder 8 rotates together with the speed governor 7 to generate a pulse signal. That is, the encoder 8 outputs a signal according to the elevation of the car.

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

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

The controller 14 judges whether the car 1 is located at the floor position according to the detection state of the detection sensor 9 received from the car controller 11 . And, the controller 14 calculates the position and speed of the car 1 using the pulse signal from the encoder 8 . Based on these pieces of information, the controller 14 outputs operation commands to the motor 4 and the hoist brake 5, thereby controlling the raising and lowering operation of the car 1 .

The car controller 11 and the controller 14 always monitor the soundness of communication through health checks, and when the normal communication cannot be performed due to a failure of the car side wireless terminal 12 or the control panel side wireless terminal 13, etc., it can be detected as Communication is abnormal.

Fig. 2 shows the structures of the car controller 11 and the controller 14 according to the embodiment of the present invention.

The car controller 11 has a detection determination unit 201 and a communication determination unit 202 within the car controller.

The detection determination unit 201 determines the detection state of the detection sensor 9 (whether the subject 10 has been detected). The communication judging unit 202 in the car controller judges whether or not the communication with the controller 14 is normal.

In addition, the car controller internal communication determination unit 202 of the car controller 11 stores the detection state of the detection sensor 9 in the detection state memory 203 when detecting a communication abnormality. The car controller 11 stores the detection status of the detection object 10 by the detection sensor 9 from now to a predetermined time ago. The detection state memory 203 of the car controller 11 can store information related to a plurality of detection states such as "the current detection state", "the detection state before 1 ms", and "the detection state before 2 ms", and has a plurality of tables for storing information. area.

The controller 14 has a car position calculation unit 204 , an intra-controller communication determination unit 205 , and a detected abnormality determination unit 206 .

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

The in-controller communication determination unit 205 determines whether or not the communication with the car controller 11 is normal. The detection abnormality determination part 206 determines the abnormality of the detection sensor 9 or the object 10 using the reception signal from the car controller 11 (henceforth referred to as detection abnormality).

Furthermore, the controller 14 has a memory 207 in the controller, and the memory 207 in the controller 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 or adjusted, the car 1 is moved from the lowest floor to the uppermost floor at a low speed and the detection sensor 9 detects the lower end of the object 10 when the elevator system is started or adjusted. Calculated value of the position (the lower end of the subject 10 on the lowest layer is set to 0). That is, the position at which the detection sensor 9 detects the lower end of the object 10 is calculated from 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 position (lower end position) of the subject 10 on each floor is stored in the floor position memory 208 .

In addition, the controller 14 stores the car position calculation value in the car position memory 209 when the in-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 related to a plurality of car positions such as "the current car position", "the car position before 1 ms", and "the car position before 2 ms". multiple regions.

Next, processing when an abnormality occurs in the elevator system will be described using FIGS. 3 and 4 .

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

The processes in Fig. 3 and Fig. 4 are executed periodically. In this embodiment, the period is 1 ms. Hereinafter, each processing step will be described. First, the processing content of the car controller 11 is demonstrated using FIG. 3. FIG.

Step S301: The communication judging unit 202 in the car controller judges whether the communication with the controller 14 is abnormal. If the communication is abnormal (Yes), the process goes to step 302 , and when the communication is not abnormal (No), the process goes to step 303 .

Step S302: The car controller 11 stores the detection state of the detection sensor 9 determined by the detection determination unit 201 in the detection state memory 203 as the “current detection state”. When the information on the detection state one cycle ago (that is, 1 ms ago) is already stored in the "current detection state", the information is moved to the "1 ms ago detection state" at the same time. Similarly, all the detection states stored in "(N)ms ago detection state" are moved to "(N+1)ms ago detection state" (N is a natural number). Therefore, a log of the detection state of the subject 10 up to the present after the occurrence of the communication abnormality is stored in the detection state memory 203 . After step S302, this process ends.

Step S303: The car controller 11 sends the information on the detection state of the detection sensor 9 determined by the detection determination unit 201 to the controller 14 . Then, transfer to step S304.

Step S304: The car controller 11 judges whether the detection state information is stored in the detection state memory 203 or not. When the information of the detection state is stored (Yes), the process moves to step S305, and when the information of the detection state is not stored (No), this flow ends.

Step S305: The car controller 11 sends all the detection state information stored in the detection state memory 203 to the controller 14. The information to be sent is arranged and sent sequentially from the current detection state, so that the controller 14 can determine that the information of each detection state is the detection state several milliseconds (ms) ago. Then, transfer to step S306. In step S305, when a communication abnormality occurs, the detection state of the subject 10 detected by the detection sensor 9 from a predetermined time ago to the present is stored with the time when the communication abnormality occurred as a starting point. When a communication abnormality is detected, the stored detection status of the subject 10 is sent to the controller 14.

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

Next, the processing content of the controller 14 will be described using FIG. 4 .

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

Step S402: The controller 14 stores the information on the car position calculated by the car position calculation unit 204 in the car position memory 209 as the "current car position". If the information of the car position one cycle ago (that is, 1 ms ago) is already stored in the "current car position", it is moved to the "1 ms ago car position" at the same time. Similarly, all the detection state information stored in "(N)ms ago car position" is moved to "(N+1)ms ago detection state" (N is a natural number). Therefore, in the car position memory 209, a log of the car position up to the present after the occurrence of the communication error is stored. After step S402, transfer to step S403.

Step S403: The controller 14 determines whether the car 1 is running based on the pulse signal from the encoder 8. When the car 1 is running (Yes), go to step S404, otherwise (No), this flow ends.

Step S404: The controller 14 reduces the rotation speed of the motor 4 to slow down the car 1 and stop it. When the communication is abnormal, the running of the car is suspended for safety. However, in order to minimize the uneasiness given to the passengers, the car 1 is not stopped suddenly but decelerated slowly and then stopped. After stopping, stop the operation of the elevator. This process ends after step S404.

Step S405: The detection abnormality determination unit 206 is based on the detected state of the detected object 10 received from the car controller 11, the current position of the car 1, and the position of the detected object 10 on each floor stored in the floor position memory 208 (lower end position), whether or not the detection sensor 9 or the object to be detected 10 is abnormal is judged. Specifically, when there is a current car position between the lower end position of the detected body 10 on any floor and a position higher than the lower end position by the length of the detected body 10, the detection sensor 9 does not detect the detected body. 10, and when the car position is out of the above range, it is determined that the detection sensor 9 or the detection object 10 is abnormal. When it is determined that the detection is abnormal (Yes), the process proceeds to step S406, and when it is not detected (No), the process proceeds to step S407.

Step S406: When it is determined that the detection sensor 9 or the detected object 10 is abnormal, the controller 14 reduces the rotation speed of the motor 4, slowly decelerates the car 1 and stops it. After stopping, stop the operation of the elevator. This process ends after step S406.

Step S407: The controller 14 judges whether or not the log of the detection state information stored in the detection state memory 203 has been received from the car controller 11 (sent in step S305). When it is received (Yes), it transfers to step S408, and when it is not received (No), this flow ends.

Step S408: The detection abnormality determination unit 206 is based on the log of the detection state received from the car controller 11, the log of the position information of the car stored in the car position memory 209, and the target information of each floor stored in the floor position memory 208. The information on the position of the lower end of the detection object 10 is used to determine the abnormality of the detection sensor 9 or the detection object 10 during the occurrence of communication abnormality. In step S405, by replacing the detection state with "(N) ms ago detection state", the car position is replaced by the logic of "(N) ms front car position" for judgment (N is a natural number), for all Log implementation judgment. When it is judged to be abnormal in any log (Yes), it transfers to step S409, and when it is not so (No), it transfers to step S410.

Step S409: The controller 14 reduces the rotation speed of the motor 4 to slow down the car 1 and stop it. After stopping, stop the operation of the elevator. After step S409, transfer to step S411.

Step S410: The controller 14 restarts the running of the elevator. When reaching this step, it is a case where a communication abnormality was detected until one cycle ago, and in this case, the controller 14 stops the operation|movement of an elevator in step S404. In steps S405 and S408, it is determined that there is no detection abnormality occurring at present and during the communication abnormality process, so the operation of the elevator is restarted. After step S410, transfer to step S411.

Step S411: The controller 14 deletes (clears) all the logs of the car position information stored in the car position memory 209 . After that, this flow is ended.

As described above, in this embodiment, abnormalities in communication and sensors are detected and the car is brought to a standstill. Like this, when communication is abnormal, car controller 11 stores the log (step S302) of the information of detection state in detection status memory 203, and controller 14 stores the log (step S402) of the information of car position in car position memory. ), after the communication returns to normal, the controller 14 uses these logs to determine the detection abnormality (step S408), so that the detection abnormality in the communication abnormal process can be found.

The above-described embodiments are described in detail to describe the present invention for easy understanding, and the present invention is not limited to necessarily having all the described configurations. For example, the encoder 8 is provided in the speed controller 7 , but it may be provided in the motor 4 .

Explanation of reference signs

1...car, 4...motor, 8...encoder, 9...detection sensor, 10...object to be detected, 11...car controller, 14...controller, 201...detection and judgment unit, 202...inside the car controller Communication judging section, 203...detection status storage, 204...car position calculation section, 205...in-controller communication judging section, 206...detection abnormality judging section, 208...floor position memory, 209...car position storage.

Claims (8)

1. An elevator system is provided with: a car which ascends and descends in an ascending and descending channel, a detection sensor which is arranged on the car, and a detected object which is arranged in the ascending and descending channel and is detected by the detection sensor,

it is characterized in that the preparation method is characterized in that,

the elevator system is provided with:

an encoder that outputs a signal according to the lifting of the car;

a controller that calculates a position of the car based on a position of the detected body provided at each floor and a signal of the encoder, and stores the calculated position of the car from a predetermined time to a present time; and

a car controller that stores a log of a detection state of the detected object detected by the detection sensor from a predetermined time ago to a present time, and transmits the detection state of the detected object to the controller,

when a communication abnormality occurs between the controller and the car controller, the controller determines an abnormality of the detection sensor or the detected object during the occurrence of the communication abnormality based on the log of the detected state of the detected object, the log of the position information of the car, and the position information of the detected object provided on each floor.

2. Elevator system according to claim 1,

and stopping the car when the detection sensor or the detected body is abnormal.

3. Elevator system according to claim 1,

the car controller stores a detection state of the detected object detected by the detection sensor from the present to a predetermined time when a communication abnormality with the controller occurs, and transmits the stored detection state of the detected object to the controller when the communication abnormality is eliminated.

4. Elevator system according to claim 3,

the car controller deletes the stored log relating to the detection state of the detected object after transmitting the stored detection state of the detected object to the controller.

5. Elevator system according to claim 1,

the controller determines an abnormality of the detection sensor or the detected body based on the detection state of the detected body received from the car controller, the current position of the car, and the position of the detected body provided at each floor.

6. Elevator system according to claim 3,

the controller determines whether or not a log of the detected state of the detected body is received from the car controller, and determines an abnormality of the detection sensor or the detected body in the process of occurrence of a communication abnormality when the log of the detected state of the detected body is received.

7. Elevator system according to claim 6,

and stopping the car when the detection sensor or the detected body is abnormal.

8. Elevator system according to claim 7,

the controller deletes the stored log of the position information of the car after stopping the car.

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