Elevator monitoring system and elevator monitoring device

Abstract

To reduce the number of times maintenance personnel are dispatched in response to a signal notifying an elevator abnormality. [Solution] The elevator monitoring system disclosed herein comprises an object detection sensor placed in the elevator car and detecting objects near the car entrance / exit, a blower means placed near the object detection sensor and blowing air toward the object detection sensor, a door control device that controls the opening and closing operation of the car door placed at the entrance / exit, and a blower control device that controls the operation of the blower means, and when the object detection sensor continues to detect an object near the entrance / exit for a period longer than a predetermined door opening time threshold, the blower control device operates the blower means to blow air toward the object detection sensor.

Description

[Technical field]

[0001] The present disclosure relates to an elevator monitoring system and an elevator monitoring device. [Background technology]

[0002] Patent Document 1 describes an elevator maintenance management system. In this maintenance management system, if monitoring data contains an elevator failure symptom, a trigger report is sent to a management server. The management server that receives the trigger report sends a confirmation message to an elevator occupant to confirm the failure symptom cause, and receives a response message from the occupant to the confirmation message. Then, based on the received response message, it is determined whether or not a maintenance worker needs to be dispatched to the site. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-038762 A Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the system determines whether a maintenance person is needed by having the passenger in the car confirm specific failure symptom factors, thereby reducing unnecessary dispatches of the maintenance person. However, the dispatch of the maintenance person can be avoided by checking with the passenger only in cases where the cause is other than a failure, such as the passenger holding the car door. In other words, if some kind of abnormality actually occurs due to dirt on the sensor caused by dust accumulation, etc., the dispatch of the maintenance person is necessary. Therefore, it is desirable to develop a system that can more effectively reduce the number of times that the maintenance person is dispatched.

[0005] In order to solve the above problems, the present disclosure provides an elevator monitoring system and monitoring device that are improved to reduce the number of times maintenance personnel are dispatched in response to signals notifying of elevator abnormalities. [Means for solving the problem]

[0006] The elevator monitoring system of the present disclosure includes an object detection sensor disposed in an elevator car and detecting an object near an entrance / exit of the car, a blower means disposed near the object detection sensor and blowing air toward the object detection sensor, a door control device that controls the opening and closing operation of a car door disposed at the entrance / exit, and a blower control device that controls the operation of the blower means, and when a state in which an object is detected near the entrance / exit by the object detection sensor continues for a period of time equal to or longer than a preset door opening time threshold, the blower control device operates the blower means to blow air toward the object detection sensor. If the object detection sensor continues to detect an object near the entrance after the blower means is operated, an external terminal is notified of the occurrence of a car door opening / closing failure. As an example, the elevator monitoring system of the present disclosure includes a record table that records the air blowing start time, which is the time when the blower means is operated, a record indicating that the cause of the door opening and closing failure confirmed in response to a notification of the occurrence of the door opening and closing failure was dirt on the object detection sensor, and a record indicating that an object was no longer detected by the object detection sensor after the blower means was operated, and the blower control device sets the operation time for operating the blower means based on the information in the record table, and operates the blower means at the operation time. Alternatively, as another example, the elevator monitoring system of the present disclosure has a blower control device that uses a learning model that outputs, from the current time, the presence or absence of dirt on the object detection sensor that would cause the car door to fail to open, to predict the presence or absence of dirt on the object detection sensor at a predicted time from the current time, and operates the blower means if it is predicted that the object detection sensor is dirty.

[0007] The elevator monitoring device of the present disclosure operates a blower means for blowing air onto the object detection sensor when a state in which an object is detected near an entrance of an elevator car by an object detection sensor that detects an object near the entrance continues for a period of time equal to or longer than a preset door-opening time threshold, thereby blowing air onto the object detection sensor; If the object detection sensor continues to detect an object near the entrance after the blower means is operated, an external terminal is notified that an elevator car door is not opening or closing properly. . As an example, the elevator monitoring device of the present disclosure sets an operation time for operating the blower means based on information in a record table that records the air blowing start time, which is the time when the blower means is operated, a record indicating that the cause of the door opening and closing failure confirmed in response to a notification of the occurrence of the door opening and closing failure was dirt on the object detection sensor, and a record indicating that an object was no longer detected by the object detection sensor after the blower means was operated, and operates the blower means at the operation time. Alternatively, as another example, the elevator monitoring device of the present disclosure uses a learning model that outputs, from the current time, the presence or absence of dirt on the object detection sensor that would cause the car door to fail to open and close, and predicts the presence or absence of dirt on the object detection sensor at a predicted time from the current time, and operates the blower means if it is predicted that the object detection sensor is dirty. Effect of the Invention

[0008] An abnormality may occur in the object detection sensor due to the adhesion of dirt due to the accumulation of dust on the object detection sensor. In this case, the dirt on the object detection sensor may be removed by blowing wind onto the object detection sensor, and the abnormality of the object detection sensor may be resolved. Therefore, the number of times maintenance personnel are dispatched can be effectively reduced. [Brief description of the drawings]

[0009] [Figure 1] 1 is a schematic diagram showing the appearance of an elevator monitoring system according to a first embodiment and its peripheral devices. [Diagram 2] 1 is a block diagram showing an overall configuration of an elevator monitoring system according to a first embodiment. [Diagram 3] 2 is a block diagram showing the configuration of a storage unit of the elevator monitoring system according to the first embodiment. FIG. [Figure 4] 3 is a diagram showing an example of a record table in a storage unit of the elevator monitoring system according to the first embodiment. FIG. [Diagram 5] 4 is a diagram showing an example of an operation table in a storage unit of the elevator monitoring system according to the first embodiment; FIG. [Figure 6] 5 is a flowchart showing an example of a control operation for opening and closing a car door by a door control device of the elevator monitoring system according to the first embodiment. [Figure 7] 5 is a flowchart showing an example of a control operation by the alarm issuing device of the elevator monitoring system according to the first embodiment. [Figure 8] 5 is a flowchart showing an example of a control operation for controlling a blower by the blower control device of the elevator monitoring system according to the first embodiment. [Figure 9] 5 is a flowchart showing an example of a control operation by the notification device of the elevator monitoring system according to the first embodiment. [Figure 10] 5 is a flowchart showing an example of a control operation by a receiving and displaying device of a terminal in the elevator monitoring system according to the first embodiment. [Figure 11] 5 is a flowchart showing an example of a control operation by the prediction device of the elevator monitoring system according to the first embodiment. [Figure 12] FIG. 11 is a schematic diagram showing the appearance of an elevator monitoring system and its peripheral devices according to a second embodiment. [Figure 13] FIG. 11 is a block diagram showing the overall configuration of an elevator monitoring system according to a second embodiment. [Figure 14] FIG. 11 is a block diagram showing the configuration of a storage unit of the elevator monitoring system according to the second embodiment. [Figure 15] FIG. 11 is a diagram showing an example of a management master of a storage unit of the elevator monitoring system according to the second embodiment. [Figure 16] FIG. 11 is a diagram showing an example of a record table in a storage unit of the elevator monitoring system according to the second embodiment. [Figure 17] 10 is a flowchart showing an example of a control operation by an alarm issuing device of the elevator monitoring system according to the second embodiment. [Figure 18] 10 is a flowchart showing an example of a control operation by a notification device of the elevator monitoring system according to the second embodiment. [Figure 19] 5 is a flowchart showing an example of a control operation by the reflectance acquisition device of the elevator monitoring system according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will be simplified or omitted.

[0011] Embodiment 1 1 is a schematic diagram showing the appearance of an elevator monitoring system and its peripheral devices according to embodiment 1. The elevator monitoring system monitors the operation of an elevator. The elevator is equipped with a car 100. At the entrance of the car 100, a car door 101 for opening and closing the entrance is provided.

[0012] An object detection sensor is installed near the car door 101 of the car 100. The object detection sensor detects an object at the entrance / exit of the car 100, and is installed to prevent passengers getting on and off from getting caught. The object detection sensor includes a door closing sensor light projector 102 (see FIG. 2) and a door closing sensor light receiver 103. The object detection sensor irradiates light from the door closing sensor light projector 102 and detects the presence or absence of an object based on a change in the amount of light reflected from the object and received by the door closing sensor light receiver 103.

[0013] A blower 104 is installed under the door closing sensor light receiving device 103. The blower 104 functions as a blower means for blowing wind onto the light receiving surface of the door closing sensor light receiving device 103. This blows away dirt such as dust that has accumulated on the surface of the door closing sensor light receiving device 103. There is no limitation on the installation position of the blower 104 as long as it can blow wind onto the light receiving surface of the door closing sensor light receiving device 103. The blower 104 may be installed, for example, above the door closing sensor light receiving device 103 and blow wind from above like an air curtain. Alternatively, the blower 104 may be installed so as to be embedded in the car 100.

[0014] A communication control device 110 is installed on the top of the car 100. The communication control device 110 is connected to a center 130 installed outside the elevator by wire or wirelessly so as to be able to communicate with it. The center 130 is also connected to a terminal 140 outside the elevator by wire or wirelessly so as to be able to communicate with it.

[0015] 2 is a block diagram showing the overall configuration of the elevator monitoring system according to embodiment 1. The elevator monitoring system according to this embodiment includes an object detection sensor (i.e., a door closing sensor light-projecting device 102 and a door closing sensor light-receiving device 103), a blower 104, a communication control device 110, a center 130, and a terminal 140.

[0016] The communication control device 110 includes a door control device 111 , a blower control device 112 , and an alarm device 113 .

[0017] The door control device 111 controls the door-opening and door-closing operations of the car door 101. When the car 100 has landed on a call floor, or when an open button on a hall operating panel or a car operating panel, etc. is operated, the door control device 111 executes the door-opening operation of the car door 101. In addition, the door control device 111 executes the door-closing operation of the car door 101 after the door-open state has continued for a certain period of time, or when a close button on a hall operating panel or a car operating panel, etc. is operated.

[0018] Alternatively, the door control device 111 will attempt to close the door again after the door has failed to close and the door remains open for a certain period of time. The door control device 111 detects an abnormality in the door closing operation if the door opening operation continues for a period of time equal to or longer than the door opening time threshold. When the door control device 111 detects an abnormality in the door closing operation, it transmits an opening / closing failure signal to the alarm device 113. Specifically, the door opening time threshold is a time that is set in advance in the door opening time setting 114 as a threshold for the door opening time. One example of the door opening time threshold is 30 seconds.

[0019] In addition, when the door control device 111 starts the door opening operation, it records the door opening start time in the door opening time record 115. In the door opening time record 115, data of the door opening start time is recorded, for example, "door opening start time = 2024 / 2 / 1, 9:00:00".

[0020] The blower control device 112 instructs the blower 104 to start and stop blowing air in accordance with an instruction signal from the alarm device 113, thereby controlling the blowing operation of the blower 104. When the blowing operation of the blower 104 starts, air is blown onto the door closing sensor light receiving device 103.

[0021] The alarm device 113 instructs the blower control device 112 to start and stop the blowing operation of the blower 104. Specifically, the alarm device 113 issues a signal to the blower control device 112 to instruct the blower control device 112 to start the blowing operation of the blower 104 in response to receiving an opening / closing failure signal from the door control device 111 or in response to receiving a blower operation request from the center 130.

[0022] Furthermore, the alarm device 113 refers to the operation setting 116, and when the elapsed time from the start of the blower blowing operation reaches the blowing time, instructs the blower control device 112 to stop blowing air from the blower 104. The blowing time is preset in the operation setting 116. The blowing time to be set is, for example, 10 seconds.

[0023] Furthermore, the alarm device 113 records in the operation record 117 that it has received the opening / closing failure signal and the operation start time of the blower 104. Alternatively, only the operation start time of the blower 104 may be recorded without including the reception of the door opening / closing failure signal. As an example, the operation record 117 may record "air blowing start time=2024 / 2 / 1, 9:10:00".

[0024] The center 130 includes a notification device 131, a storage unit 132, and a prediction device 133. The notification device 131 receives a report from the report issuing device 113.

[0025] In response to the alarm from the alarm issuing device 113, the notification device 131 determines whether to notify the terminal 140 of the occurrence of a door opening / closing failure. In making this determination, the notification device 131 refers to the conditions stored in the storage unit 132.

[0026] 3 is a block diagram showing the configuration of the storage unit 132. As shown in FIG. 3, the storage unit 132 includes a management master 134, a record table 135, and an operation table 136.

[0027] The notification device 131 decides whether or not to send a notification to the terminal 140 based on whether or not multiple alerts have been received from the alarm issuing device 113 within a reference time. A reference time that serves as a threshold for this decision is set in the management master 134. The reference time is, for example, two minutes. Furthermore, when the operation time set by the prediction device 133 arrives, the notification device 131 transmits a blower operation request to the alarm issuing device 113 to instruct the blower 104 to perform a blowing operation.

[0028] Fig. 4 is a diagram showing an example of a record table. As shown in Fig. 4, for example, time, dispatch of maintenance personnel, and dispatch result are stored in record table 135 in association with each other. Here, the time is the time when a report was received, the dispatch of maintenance personnel is information indicating whether or not a maintenance personnel was dispatched in response to the report, and the dispatch result is information indicating the situation as a result of the dispatch of the maintenance personnel.

[0029] The prediction device 133 predicts and sets the time to operate the blower 104 from records in the record table 135 of maintenance personnel dispatch and dispatch results indicating that a maintenance personnel was dispatched and the sensor contamination was resolved, i.e., a record of maintenance personnel dispatch "dispatched" and a dispatch result of "sensor contamination", a record of "no dispatch" where a maintenance personnel was not dispatched because the blower 104 was operated, and the time when the maintenance personnel was dispatched.

[0030] 5 is a diagram showing an example of an operation table 136. The operation times predicted by the prediction device 133 are set in the operation table 136 as shown in FIG.

[0031] The elevator monitoring device of the present disclosure is composed of, for example, an alarm device 113 and a center 130.

[0032] The terminal 140 may be, for example, a terminal that can be carried by an elevator maintenance person, or may be, for example, a terminal installed in an elevator monitoring center outside the building. The terminal 140 includes a receiving and displaying device 141. Although not shown, the terminal 140 includes a display or the like as a means for displaying information to the maintenance person. The terminal 140 may include a notification means such as a speaker that notifies information by voice in addition to or instead of the display means. The receiving and displaying device 141 receives a notification from the notification device 131 and displays the contents of the received notification on the display means.

[0033] Next, the control operations of the elevator monitoring system according to this embodiment will be described with reference to Figures 6 to 11. The control operations of Figures 6 to 11 are executed every time the elevator monitoring system is started and the elevator starts operating.

[0034] Fig. 6 is a flowchart showing an example of a control operation of opening and closing a car door by the door control device according to this embodiment. The control by the door control device 111 will be described with reference to Fig. 6. In the control operation in Fig. 6, first, in step S101, the door open time threshold set in the door open time setting 114 is acquired.

[0035] Next, in step S102, it is determined whether or not to perform a door-opening operation. Specifically, when the car 100 has landed on the call floor, or when the operation of the open button on the hall operating panel or the car operating panel is accepted when the car 100 has landed on the floor, it is determined that the door-opening operation is to be performed.

[0036] If it is determined in step S102 that the door-opening operation is to be performed, the process proceeds to step S103, where the car door 101 is opened. After that, in step S104, the time at which the door-opening operation started is recorded as the door-opening start time in the door-opening time record 115. After that, the process returns to step S102.

[0037] On the other hand, if it is determined in step S102 that the door-opening operation is not to be performed, then in step S105 it is determined whether or not to perform the door-closing operation. Specifically, if the door-open state continues for a certain period of time, or if the close button on the hall operating panel or car operating panel is operated, or if the door-open state continues for a certain period of time after the door-closing operation has failed, it is determined that the door-closing operation is to be performed. If it is determined in step S105 that the door-closing operation is not to be performed, the process returns to step S102.

[0038] On the other hand, if it is determined in step S105 that the door closing operation is to be performed, then in step S106 it is determined whether the door closing sensor light receiving device 103 is receiving light. If it is determined that the door closing sensor is receiving light, it can be determined that no object that would be an obstacle to opening or closing the car door 101 has been detected near the entrance / exit of the car 100. Therefore, if it is determined in step S106 that the door closing sensor light receiving device 103 is receiving light, the process proceeds to step S107, and the door closing operation of the car door 101 is executed.

[0039] Thereafter, the door opening start time recorded in the door opening time record 115 in step S108 is deleted, and the process returns to step S102.

[0040] On the other hand, if it is determined in step S106 that the door closing sensor light receiving device 103 has not received light, the process proceeds to step S109. In step S109, it is determined whether or not the time difference between the current time and the door opening start time recorded in step S104 is equal to or greater than the door opening time threshold value acquired in step S102. If it is determined in step S109 that the time difference is smaller than the door opening time threshold value, the process returns to step S102.

[0041] On the other hand, if it is determined in step S109 that the time difference is equal to or greater than the door open time threshold, the process proceeds to step S110. In step S110, an opening / closing failure signal is transmitted to the alarm device 113. After that, the process returns to step S102.

[0042] 7 is a flow chart showing an example of a control operation by the alarm issuing device according to the present embodiment. An example of a control operation by the alarm issuing device 113 will be described with reference to FIG.

[0043] In the control of FIG. 7, first, in step S201, the air blowing time set in the operation setting 116 is obtained.

[0044] In step S202, it is determined whether the air blowing start time is recorded in the operation record 117. The air blowing start time in the operation record 117 is the time recorded by the process of step S206 described below.

[0045] If it is determined in step S202 that the blowing start time is not recorded, then in step S203, it is determined whether or not a blower operation request has been received. The blower operation request is a signal transmitted to the alarm issuing device 113 by the control process of the notification device 131, which will be described later.

[0046] If it is determined in step S203 that the blower operation request has not been received, then in step S204, it is determined whether or not an opening / closing failure signal has been received. The door opening failure signal is a signal transmitted by the control process by the door control device 111 in Fig. 6 described above. If it is determined in step S204 that the opening / closing failure signal has not been received, the process returns to step S202.

[0047] If it is determined in step S203 that a blower operation request has been received, or if it is determined in step S204 that an opening / closing failure signal has been received, then in step S205, an instruction to perform a blowing operation is sent to the blower control device 112. Next, in S206, the blowing start time is recorded in the operation record 117. Thereafter, the process returns to step S202.

[0048] If it is determined in step S202 that the operation record 117 contains a record of the air blowing start time, then in S207 it is determined whether the time difference between the current time and the air blowing start time is equal to or greater than the air blowing time acquired in step S201. If it is determined in step S207 that the time difference is less than the air blowing time, the process returns to step S202.

[0049] If it is determined in step S207 that the time difference is equal to or greater than the air blowing time, in step S208, an instruction to stop air blowing is sent to the blower control device 112. Next, in step S209, a report is sent to the center 130. Information on the air blowing start time is added to this report.

[0050] Next, in S210, the air blowing start time is deleted from the operation record 117. After that, the process returns to step S202.

[0051] 8 is a flow chart showing an example of a control operation for controlling the blower by the blower control device according to the present embodiment. An example of control of the blower 104 by the blower control device 112 will be described with reference to FIG.

[0052] In the control process of Fig. 8, first, in step S301, it is determined whether or not an air blowing operation instruction has been received. The air blowing operation instruction is an instruction issued from the alarm issuing device 113 by the control process of Fig. 7. If it is determined in step S301 that an air blowing operation instruction has not been received, the process returns to S301, and the determination process of step S301 is repeatedly executed at a predetermined control interval until an air blowing operation instruction is received.

[0053] On the other hand, if it is determined in step S301 that an instruction to blow air has been received, then in step S302, the blowing operation of the blower 104 is started.

[0054] Next, in step S303, it is determined whether or not an instruction to stop blowing has been received. The instruction to stop blowing is an instruction issued from the alarm issuing device 113 by the control process described in Fig. 7. If it is determined in step S303 that an instruction to stop blowing has not been received, the process returns to step S303, and the determination process of step S303 is repeatedly executed at a predetermined control interval until an instruction to stop blowing is received.

[0055] If it is determined in step S303 that the instruction to stop blowing has been received, then in step S304, the blowing operation of the blower 104 is stopped. Then, the process returns to step S301.

[0056] 9 is a flow chart showing an example of a control operation by the notification device according to the present embodiment. An example of a control operation by notification device 131 will be described with reference to FIG.

[0057] 9, first, in step S401, the reference time is acquired from the management master 134. Next, in step S402, the operation time is read from the operation table 136.

[0058] Next, in step S403, it is determined whether the current time has reached the operation time. If it is determined in step S403 that the operation time has reached, then in step S404, a signal requesting operation of the blower is transmitted to the alarm device 113.

[0059] If it is determined in step S403 that the current time is not the operation time, or after a blower operation request is sent in step S404, it is then determined in step S405 whether or not an alert has been received. An alert is a signal sent to notification device 131 when an instruction to stop blowing is sent to blower control device 112 by the control process by alert issuing device 113 in Fig. 7. If it is determined in step S405 that an alert has not been received, the process returns to step S402.

[0060] If it is determined in step S405 that an alert has been received, then in step S406, the record table 135 is referenced to obtain the most recent alert time. The most recent alert time is the time when the previous alert was received. Here, the most recent alert time is referred to as "alert time 1."

[0061] Next, in S407, the air blowing start time transmitted together with the currently received alert is added to the record table 135. The currently recorded time in step S407 is referred to as "alert time 2."

[0062] Next, in step S408, it is determined whether the time difference between the alarm time 2 and the alarm time 1 is equal to or greater than the reference time acquired in step S401. That is, it is determined here whether the interval between the time when the blower 104 last sent air and the time when the blower 104 currently sent air is equal to or greater than the reference time. If the time difference between the alarm time 2 and the alarm time 1 is equal to or greater than the reference time, the process returns to step S402.

[0063] On the other hand, if it is determined in step S408 that the time difference is less than the reference time, then in step S409, a notification is sent to the terminal 140. This notification indicates that the interval between blowing air by the blower 104 has become shorter than the reference time, that is, that a door opening / closing abnormality has occurred that cannot be resolved by blowing air by the blower 104 to the door closing sensor light receiving device 103. Then, the process returns to step S402.

[0064] Fig. 10 is a flow chart showing an example of a control operation by the receiving and displaying device of the terminal. An example of the control operation by the receiving and displaying device 141 will be described with reference to Fig. 10. In step S501, it is determined whether or not a notification has been received from the notification device 131 of the center 130. Here, the notification is notified by the control operation of the notification device 131 in Fig. 9. If it is determined that the notification has not been received, the process returns to step S501.

[0065] On the other hand, if it is determined in step S501 that a notification has been received, the process proceeds to step S502. In step S502, a message urging the dispatch of a maintenance technician is displayed on the display or the like of the terminal 140. Instead of or in addition to displaying the message, a voice message or a predetermined warning sound may be output from a speaker. Thereafter, the process returns to step S501.

[0066] Fig. 11 is a flow chart showing an example of a control operation by the prediction device. A control operation for periodically blowing air by the blower 104 as a measure against the adhesion of dust to the door closing sensor light receiving device 103 will be described with reference to Fig. 11.

[0067] In step S601, record table 135 is read. Next, in step S602, only the time is extracted from the date and time of the record in which the dispatch result was "sensor soiling", and time list 1 containing only unique values ​​is extracted. For example, in the example of record table 135 in FIG. 4, "9:00:00, 12:00:00" is extracted as time list 1.

[0068] Next, in step S603, from the date and time of the record for which no dispatch was required, that is, the record for which the dispatch result in record table 135 is "-", meaning that no maintenance staff was dispatched, only the time is extracted, and a time list 2 containing only unique values ​​is extracted. In the example of record table 135 in Fig. 4, "8:50:00, 9:00:00" is extracted as time list 2.

[0069] Next, in step S604, the item time difference between items in time list 2 is calculated. The item time difference is the time difference between times in time list 2. In the example of record table 135 in FIG. 4, the item time difference is "00:10:00." Here, if three or more times are extracted in time list 2, for example, the longest time difference between the time differences between two adjacent times, or the average time between the time differences between two adjacent times, can be set as the item time difference.

[0070] Next, in step S605, each time in the time list 1-item time difference is sequentially linked to each time in the time list 1 to create a time list 3 containing only unique values. In the example of the record table 135 in Fig. 4, the time list 3 is "8:50:00, 9:00:00, 11:50:00, 12:00:00".

[0071] Next, in step S606, the time list 3 is set as the operation time in the operation table 136. Then, the current process is terminated. According to the operation time set here, a blower operation request is transmitted from the notification device 131 to the alarm issuing device 113, and in response, the blower 104 performs the blowing operation.

[0072] As a more specific example, an operation example in which dust adhesion to the door closing sensor light receiving device 103 is removed by the blowing operation of the blower 104 will be described.

[0073] For example, when the car 100 is called from the first floor landing and lands on the first floor, the door control device 111 performs a door-opening operation and records the time at which this occurs (for example, 2024 / 2 / 1, 9:00:00) in the door-opening time record 115 as the door-opening start time.

[0074] The door control device 111 determines to perform the door closing operation after continuing the door open for a certain period of time, but if the door closing sensor light receiving device 103 cannot receive light, it compares the time difference between the current time (e.g., 2024 / 2 / 1, 9:00:30) and the door opening start time (e.g., 9:00:00) with the door opening time threshold (e.g., 30 seconds). If the comparison shows that the time difference is equal to or greater than the door opening time threshold, it sends an opening / closing failure signal to the alarm device 113.

[0075] When the alarm device 113 receives an opening / closing failure signal from the door control device 111, it instructs the blower control device 112 to perform air blowing operation, and records the air blowing start time (for example, 2024 / 2 / 1, 9:00:30) in the operation record 117.

[0076] Thereafter, when the alarm issuing device 113 determines that there is a record of the air blowing start time in the operation record 117, it compares the time difference between the current time and the air blowing start time (e.g., 2024 / 2 / 1, 9:00:30) with the air blowing time (e.g., 10 seconds). If the comparison shows that the time difference is equal to or greater than the air blowing time (e.g., when the current time becomes 9:00:40), the alarm issuing device 113 instructs the blower control device 112 to stop blowing. The alarm issuing device 113 then issues an alert to the notification device 131 and deletes the air blowing start time.

[0077] In the process after the dust on the door closing sensor light receiving device 103 is blown away by the blower 104, the door control device 111 again determines to perform the door closing operation. If it is determined that the door closing sensor light receiving device 103 is receiving light, the door control device 111 closes the car door 101 and deletes the door opening start time (for example, 2024 / 2 / 1, 9:00:00) from the door opening time record 115.

[0078] When the notification device 131 receives an alert, it refers to the record table 135 and compares the time difference between the immediately preceding alert time 1 (for example, 2024 / 2 / 1, 8:50:00) and the alert time 2 (2024 / 2 / 1, 9:00:30) sent together with the alert with the reference time. If the comparison shows that the time difference is less than the reference time, the notification device 131 does not notify the terminal 140.

[0079] In this example, after the opening / closing failure signal is transmitted, the door closing sensor light receiving device 103 is able to receive light due to the air blown from the blower 104, so the door opening / closing failure is resolved and a second opening / closing failure signal is not transmitted. Therefore, the opening / closing failure signal is transmitted in response to the current light receiving failure of the door closing sensor light receiving device 103, and the alarm is issued from the alarm issuing device 113 to the notification device 131 only once. Therefore, the interval between the current alarm time 2 and the previous alarm time 1 is longer than the reference time, and notification to the maintenance personnel terminal 140 is avoided. This reduces the need to dispatch a maintenance personnel.

[0080] Next, as another specific example, an operation example in which the light reception abnormality of the door closing sensor light receiving device 103 is not resolved by blowing air to the door closing sensor light receiving device 103 will be described.

[0081] In this example, first, in step S110, an opening / closing failure signal is sent to the alarm device 113, and then the alarm device 113 sends an instruction to start blowing air and an instruction to stop blowing air to the blower control device 112, causing the blower 104 to blow air. The flow from the issuance of the alarm and the start time of blowing air to the notification device 131 is the same as in the above specific example in which the abnormality in the door closing sensor light receiving device 103 is resolved by the blowing of air by the blower 104.

[0082] In this example, the blowing operation of the blower 104 does not restore light reception to the door closing sensor light receiving device 103. Therefore, when the process of Fig. 6 is executed again, the opening / closing failure signal is transmitted again.

[0083] In response to the opening / closing failure signal, the alarm device 113 again issues an instruction to start blowing air, records a new time to start blowing air, and then issues a report together with the new time to start blowing air to the notification device 131.

[0084] In this example, in response to the light reception failure of the door closing sensor light receiving device 103, an opening / closing failure signal is sent twice in succession, and a notification of the air blowing start time is issued to the notification device 131. Therefore, the interval between the first notification time 1 and the next notification time 2 becomes shorter than the reference time. Therefore, the occurrence of the door opening / closing failure is notified to the terminal 140.

[0085] Next, a specific example of the case where the blower 104 is operated periodically based on the operation time set by the prediction device 133 will be described.

[0086] The prediction device 133 sets the operation time of the blower 104 based on the time when the maintenance person was dispatched, the record of the sensor contamination being eliminated by the maintenance person being dispatched, and the record of the operation of the blower 104 eliminating the need for the maintenance person to be dispatched.

[0087] For example, an example of setting the operating time of the blower 104 will be described from the record example of the record table 135 of Fig. 4. The record table 135 of Fig. 4 records that the blower 104 operated at 8:50 and 9:00 on 2 / 1 / 2024, so that a maintenance worker did not need to be dispatched, and records that a maintenance worker was dispatched at 9:00 on 1 / 30 / 2024 and 1 / 31 / 2024, and at 12:00 on 1 / 29 / 2024, and that the cause of the alarm was sensor dirt on the object detection sensor.

[0088] In this case, only the time is extracted from the date and time of the record in which the result of the maintenance worker's dispatch was "dirty sensor," and "9:00:00, 12:00:00" is extracted as time list 1 containing only unique values.

[0089] Next, from the date and time of the record in record table 135 where the dispatch result is "-", only the time is extracted, and "8:50:00, 9:00:00" is extracted as time list 2 of only unique values.

[0090] Next, the inter-item time difference is calculated for time list 2. The item time difference is the time difference between the times in time list 2. In the example of record table 135 in FIG. 4, the item time difference is "00:10:00".

[0091] Next, the time list 1-item time difference time is concatenated with the time list 1 to create a time list 3 containing only unique values. In the example of the record table 135 in Fig. 4, the time list 3 is "8:50:00, 9:00:00, 11:50:00, 12:00:00". The time list 3 is set in the operation table 136.

[0092] The notification device 131 reads the operation time (for example, “8:50:00, 9:00:00, 11:50:00, 12:00:00”) from the operation table 136, and if it determines that the current time is an operation time, it transmits a blower operation request to the alarm issuing device 113.

[0093] When the alarm device 113 receives the blower operation request, it instructs the blower control device 112 to start the blower 104 blowing air, and then, when a predetermined blowing time has elapsed, it instructs the blower control device 112 to stop blowing air. In this case, an alarm is also issued to the notification device 131.

[0094] As described above, according to the elevator monitoring system of this embodiment, if an abnormality occurs during the door closing operation and an opening / closing failure signal is transmitted, the blower 104 blows air onto the door closing sensor light receiving device 103. If this causes the door closing sensor light receiving device 103 to be able to receive light and the abnormality in the door closing operation is resolved, the maintenance personnel terminal 140 is not notified of the occurrence of the abnormality. This makes it possible to reduce the number of times a maintenance personnel is dispatched for inspection.

[0095] In this embodiment, the prediction device 133 predicts the time when the door closing sensor light receiving device 103 may become dirty, and the blower 104 periodically blows air at the set blower operation time. In this way, by periodically blowing air with the blower 104, it is possible to suppress the accumulation of dirt on the door closing sensor light receiving device 103. As a result, the generation of an opening / closing failure signal of the car door 101 caused by the door closing sensor light receiving device 103 not receiving light from the door closing sensor light projector 102 can be reduced, and the number of times that a maintenance worker must be dispatched can be reduced.

[0096] The elevator monitoring system may not have a configuration for periodically operating the blower 104. Alternatively, the elevator monitoring system is not limited to a configuration including the prediction device 133. For example, the system may be configured to set the blower operation time in advance and to blow air by the blower 104 at the set operation time without making a prediction based on the occurrence of sensor dirt in the past. Also, even when the blower operation time is set by the prediction device 133, the method of setting the blower operation time is not limited to the method described in the present embodiment. The prediction device 133 refers to the records of the time, the dispatch of the maintenance personnel, and the dispatch result in the record table 135 to predict the timing of occurrence of sensor dirt in the door closing sensor light receiving device 103, and operates the blower 104 before that timing, thereby effectively suppressing the occurrence of door opening and closing failures.

[0097] Also, in this embodiment, the blower 104 is arranged for the door closing sensor light-receiving device 103, and wind is blown to the door closing sensor light-receiving device 103 by the blower 104. However, the elevator monitoring system is not limited to this. For example, the elevator monitoring system may also be one in which a blower is provided for the door closing sensor light-projecting device 102. In this case, for example, a configuration may be used in which wind is blown from the blower to the door closing sensor light-projecting device 102 in synchronization with the timing at which the blower 104 blows wind to the door closing sensor light-receiving device 103.

[0098] Embodiment 2 Fig. 12 is a schematic diagram showing the appearance of an elevator monitoring system and its peripheral devices according to embodiment 2. The elevator monitoring system in Fig. 12 is the same as the elevator monitoring system in Fig. 1, except that it includes a projector 105 and a reflectance measuring instrument 106.

[0099] The light projector 105 and the reflectance measuring device 106 are disposed above the door closing sensor light receiving device 103. The light projector 105 is disposed at a position where it can project light onto the door closing sensor light receiving device 103, and projects light toward the door closing sensor light receiving device 103. The reflectance measuring device 106 is disposed at a position where it can receive reflected light from the door closing sensor light receiving device 103. Based on a change in the amount of reflected light received by the reflectance measuring device 106, the degree of dirt on the door closing sensor light receiving device 103 can be measured. Similarly, a blower 104, a light projector 105, and a reflectance measuring device 106 may be installed for the door closing sensor light projector 102.

[0100] Fig. 13 is a block diagram showing the overall configuration of an elevator monitoring system according to this embodiment. The elevator monitoring system in Fig. 13 is the same as the elevator monitoring system in Fig. 2 except that it includes a floodlight 105, a reflectance measuring instrument 106, a reflectance acquisition device 118, a reflectance acquisition setting 119, and a reflectance acquisition record 120, and includes a memory unit 232 instead of the memory unit 132.

[0101] The reflectance acquisition device 118 acquires the reflectance from the reflectance measuring device 106 by referring to the reflectance acquisition setting 119. The reflectance acquisition setting 119 sets an acquisition interval for the reflectance. As an example, the reflectance acquisition interval is one hour. The acquired reflectance is recorded in the reflectance acquisition record 120. As an example, the reflectance acquisition record 120 records the time when the reflectance was acquired, for example, "reflectance acquisition time=2024 / 1 / 29, 12:30:00". In addition, when the reflectance acquisition device 118 receives a reflectance acquisition request from the alarm device 113 instructing to acquire a reflectance, the reflectance acquisition device 118 acquires the reflectance using the reflectance measuring device 106 and records it in the reflectance acquisition record 120.

[0102] 14 is a block diagram showing the configuration of the storage unit according to the present embodiment. As shown in FIG. 14, the storage unit 232 includes a management master 234, a record table 235, and a learning model 236.

[0103] Fig. 15 is a diagram showing an example of the management master. As shown in Fig. 15, the management master 234 is set with a predicted time together with a reference time that is a criterion for determining whether or not to notify the terminal 140. In the example of Fig. 15, the reference time is set to 2 minutes, and the predicted time is set to 1 hour.

[0104] Fig. 16 is a diagram showing an example of the record table 235. As shown in Fig. 16, the record table 235 records, for example, date and time, dispatch of a maintenance worker, the dispatch result, and reflectance. The date and time is the time when the alert was received, the dispatch of a maintenance worker is whether or not a maintenance worker was dispatched, and the dispatch result is information indicating the situation as a result of the dispatch of the maintenance worker and as determined by the inspection. The reflectance is the reflectance measured by the reflectance measuring device 106 at each time.

[0105] The learning model 236 is a learning model that uses a time as input, infers whether heavy soiling that would cause a light reception abnormality in the door closing sensor light receiving device 103 will occur at that time, and outputs the inference result. The learning model 236 is generated by machine learning based on the data recorded in the record table 235. The construction of the learning model 236 will be described later.

[0106] The prediction device 133 uses the learning model 236 to estimate whether heavy soiling that would cause a light reception abnormality will occur in the door closing sensor light receiving device 103 at a time a predetermined predicted time ahead of the current time. If it is estimated that heavy soiling will occur as a result, a blower operation request is sent to the alarm device 113 to operate the blower 104. This allows the dirt on the door closing sensor light receiving device 103 to be removed in advance, suppressing the occurrence of heavy soiling.

[0107] Next, the control operations of the elevator monitoring system according to this embodiment will be described with reference to Figs. 17 to 19. The control operations of Figs. 17 to 19 are executed every time the elevator monitoring system is started and the elevator starts operating. Note that examples of the control operations by the door control device 111, the blower control device 112, and the receiving and display device 141 of the terminal 140 are the same as those described with reference to Figs. 6, 8, and 10.

[0108] Fig. 17 is a flowchart showing an example of a control operation by the alarm issuing device according to embodiment 2. An example of a control operation by the alarm issuing device 113 will be described with reference to Fig. 17. The control process of Fig. 17 is executed in place of that of Fig. 7, and is the same as the control operation of Fig. 7 except that it has a process of step S701 after the process of step S208 in Fig. 7, and has a process of step S702 instead of step S209.

[0109] 17, after an instruction to stop blowing air from blower 104 is transmitted in step S208, the reflectance measured by reflectance measuring instrument 106 is read in step S701. After that, in step S702, the reflectance is transmitted together with the blowing start time when an alert is issued to notification device 131.

[0110] Fig. 18 is a flowchart showing an example of a control operation by the notification device according to embodiment 2. The control operation by notification device 131 will be described with reference to Fig. 18. The control process in Fig. 18 is executed in place of that in Fig. 9.

[0111] 18, first, in step S801, a reference time and a predicted time are obtained from the management master 234. Next, in step S802, it is determined whether or not heavy soiling is predicted to occur. This determination is made by providing the current time and the predicted time to the learning model 236 and obtaining from the learning model 236 a response regarding the prediction of heavy soiling occurring at a time that is the predicted time ahead of the current time.

[0112] If it is determined in step S802 that heavy soiling is predicted to occur, then in step S803, a signal requesting operation of the blower is transmitted to the alarm device 113. After that, the process returns to step S802.

[0113] If it is determined in step S802 that heavy soiling is not predicted, then in step S804, it is determined whether or not an alert has been received. The alert is a signal transmitted to the notification device 131 when an instruction to stop blowing air is transmitted to the blower control device 112 under the control of the alert issuing device 113 in Fig. 17. If it is determined in step S804 that an alert has not been received, the process returns to step S802.

[0114] If it is determined in step S804 that an alert has been received, then in step S805, the immediately preceding alert time is acquired by referring to the record table 235. Here, the immediately preceding alert time is referred to as "alert time 1."

[0115] Next, in step S806, the time and reflectance transmitted together with the alert are added to the record table 235. The time currently recorded in step S806 is referred to as "alert time 2."

[0116] Next, in step S807, it is determined whether the time difference between the alarm time 2 and the alarm time 1 is equal to or greater than the reference time acquired in step S801. That is, it is determined here whether the interval between the time when the blower 104 last blew air and the time when the blower 104 currently blew air is equal to or greater than the reference time. If the time difference between the alarm time 2 and the alarm time 1 is equal to or greater than the reference time, the process returns to step S802.

[0117] On the other hand, if it is determined in step S807 that the time difference is less than the reference time, then in step S808, a notification is made to the terminal 140. After that, the process returns to step S802.

[0118] 19 is a flow chart showing an example of a control operation executed by the reflectance acquisition device according to this embodiment. The control operation performed by the reflectance acquisition device 118 when acquiring the reflectance will be described with reference to FIG.

[0119] As shown in Fig. 19, in step S901, the reflectance acquisition interval is acquired from the reflectance acquisition setting 119. Next, in step S902, it is determined whether or not a reflectance acquisition request has been received. The reflectance acquisition request is issued from the alarm issuing device 113 when, for example, the reflectance is acquired in step S701 by the control operation of the alarm issuing device 113 in Fig. 17. Furthermore, when it becomes necessary to measure the reflectance, for example when a maintenance person is called out, the maintenance person can also transmit a signal requesting the acquisition of reflectance from the terminal 140.

[0120] If it is determined in step S902 that a reflectance acquisition request has been received, then in step S903, the reflectance is acquired. That is, an instruction to project light is issued to the light projector 105, and the reflectance measured by the reflectance acquisition device 118 is acquired. In step S904, the acquired reflectance is returned to the sender of the reflectance acquisition request.

[0121] On the other hand, if it is determined in step S902 that a reflectance acquisition request has not been received, then in step S906, the reflectance acquisition time recorded in the reflectance acquisition record 120 is acquired. The reflectance acquisition time is the time recorded in the process of step S905, which will be described later.

[0122] Next, in step S907, it is determined whether the time difference between the current time and the reflectance acquisition time is equal to or greater than the reflectance acquisition interval. If it is determined in step S907 that the time difference is less than the reflectance acquisition interval, the process returns to step S902.

[0123] On the other hand, if it is determined in step S907 that the difference is equal to or greater than the reflectance acquisition interval, then the reflectance is acquired in step S908.

[0124] Next, in step S909, the current time, "-" indicating that no maintenance personnel was dispatched, "-" indicating that there was no dispatch result, and the reflectance obtained in step S908 are recorded in the record table 235.

[0125] After recording in record table 235 in step S909, or after the reflectance is returned in step S904, next in S905 the reflectance acquisition time in reflectance acquisition record 120 is updated with the current time. Then, processing returns to step S902.

[0126] Next, a more specific description will be given of the operation when the reflectance is recorded in the record table 235. The periodic acquisition of the reflectance is performed at a reflectance acquisition interval (e.g., one hour) set in the reflectance acquisition setting 119. The reflectance acquisition device 118 acquires the reflectance acquisition time (e.g., 2024 / 1 / 29, 12:30:00) from the reflectance acquisition record 120. If the time difference between the acquired reflectance acquisition time and the current time is equal to or greater than the reflectance acquisition interval (one hour), the reflectance acquisition device 118 acquires the reflectance from the reflectance measurement device 106.

[0127] The acquired reflectance (e.g., 50%) is recorded in record table 235 of memory unit 232 in association with the current time, a record of "-" indicating that no maintenance personnel was dispatched, and a record of "-" indicating the result of the dispatch, and is accumulated in record table 235 as reflectance data when no maintenance personnel was dispatched.

[0128] The reflectance is also acquired and recorded when, for example, a reflectance acquisition request is issued from the alarm issuing device 113. Specifically, when the alarm issuing device 113 receives a blower operation request or an opening / closing failure signal, it instructs the blower control device 112 to perform an air blowing operation and records the air blowing start time (for example, 2024 / 2 / 1, 9:00:30). After that, when the air blowing time (for example, 10 seconds) has elapsed, the alarm issuing device 113 instructs the blower control device 112 to perform an air blowing operation and transmits a reflectance acquisition request to the reflectance acquisition device 118. The reflectance acquired by the reflectance acquisition device 118 (for example, 40%) is issued to the notification device 131 together with the air blowing start time (for example, 2024 / 2 / 1, 9:00:30).

[0129] The control operation of the notification device 131 adds the air blowing start time (i.e., alert time 2) and the reflectance to the record table 235. Furthermore, when the notification is sent to the terminal 140 and a maintenance worker is dispatched, the maintenance worker updates the record table 235. The record table 235 accumulates the date and time when the maintenance worker was dispatched, a record of "dispatched" for the maintenance worker dispatch, a record of the dispatch result, and data on the reflectance measured before the door closing sensor light receiving device 103 was repaired (i.e., when the sensor was dirty).

[0130] An example of constructing the learning model 236 will be described. As described above, the dirt of the door closing sensor light receiving device 103 is quantified by measuring and recording the measured reflectance in the record table 235. From the data on date and time and reflectance, a decrease in the reflectance of the door closing sensor light receiving device 103 over time is predicted by time series analysis. In addition, a learning model 236 is constructed by machine learning the occurrence of heavy sensor dirt that becomes "sensor dirt" from the change in reflectance over time by supervised learning that assumes that the correct answer is "sensor dirt" when a maintenance worker is dispatched.

[0131] In this embodiment, the learning model 236 may be configured to include a learning device, and the learning model 236 may be periodically updated using the records in the record table 235. The learning model 236 may also be equipped with only a constructed learning model. In this case, for example, the learning model 236 may be configured to be periodically updated by a learning device equipped in a cloud server or an external terminal or the like.

[0132] An example of an operation in which a blower operation request is transmitted by the notification device 131 will be described. The notification device 131 acquires a predicted time (for example, one hour) from the management master 234 in the storage unit 232. The notification device 131 provides the learning model 236 with a future time (for example, 2024 / 2 / 1, 11:00:00) obtained by adding the predicted time (for example, one hour) to the current time (for example, 2024 / 2 / 1, 10:00:00), and causes the learning model 236 to predict the occurrence of heavy soiling at that future time. If the output from the learning model 236 predicts the occurrence of heavy soiling at that future time, the notification device 131 transmits a blower operation request to the alarm issuing device 113.

[0133] In this manner, in this embodiment, the dirt on the door closing sensor light receiving device 103 can be removed in advance by predicting the occurrence of heavy dirt on the sensor using the learning model 236. This reduces the need to dispatch maintenance personnel.

[0134] In this embodiment, the blower 104, the projector 105, and the reflectance measuring device 106 are arranged for the door closing sensor light-receiving device 103, and the blower 104 is operated by predicting heavy soiling of the door closing sensor light-receiving device 103. However, the elevator monitoring system is not limited to this. For example, the elevator monitoring system may also be one in which a blower is provided for the door closing sensor light-projecting device 102. In this case, for example, the configuration may be such that wind is blown from the blower to the door closing sensor light-projecting device 102 in synchronization with the timing at which the blower 104 blows wind to the door closing sensor light-receiving device 103.

[0135] Furthermore, the elevator monitoring system may be configured, for example, such that a blower, a floodlight, and a reflectance measuring device are also provided for the door closing sensor floodlight 102. In this case, a learning model for predicting heavy soiling of the door closing sensor floodlight 102 is generated by machine learning, and when the learning model predicts the occurrence of heavy soiling on the door closing sensor floodlight 102 at a future time that is a predicted time ahead of the current time, the system can be configured to cause the blower provided for the door closing sensor floodlight 102 to perform an air blowing operation.

[0136] In the above embodiment, a description has been given of a case in which the elevator monitoring system comprises the communication control device 110, the center 130, and the terminal 140, the communication control device 110 comprises the door control device 111, the blower control device 112, the alarm device 113, the reflectance acquisition device 118, etc., and the center 130 comprises the notification device 131 and the prediction device 133. However, these devices do not need to be physically independent individual devices, and it is sufficient that one or more control devices are equipped with the functions of these devices.

[0137] In addition, the functions realized by the components of each device, etc. described in the above embodiments may be implemented using a circuit including a general-purpose processor, a specific application processor, an integrated circuit, an ASICs (Application Specific Integrated Circuits), a CPU (Central Processing Unit), a conventional circuit, or a combination thereof, which is programmed to realize the described functions. A processor is considered to be a circuit because it includes transistors and other circuits. A processor may execute a program stored in a memory. In addition, a circuit, a unit, or a means in the embodiments is hardware that is programmed to realize the described functions, or hardware that executes the described functions. The hardware may be any hardware disclosed in the embodiments, or any hardware that is programmed to realize the described functions, or known to execute the described functions. In the case where the hardware is a processor that can be considered as a kind of circuit, the circuit, means, or unit is a combination of hardware and software used to configure the hardware and / or processor.

[0138] In the above embodiments, when the number, quantity, amount, range, etc. of each element is mentioned, the elevator monitoring system or monitoring device of the present disclosure is not limited to the mentioned number unless otherwise specified or clearly specified in principle. Furthermore, the structures, etc. described in the embodiments are not necessarily essential unless otherwise specified or clearly specified in principle. [Explanation of symbols]

[0139] 101 car door, 102 door closing sensor light projecting device, 103 door closing sensor light receiving device, 104 blower, 105 projector, 106 reflectance measuring device, 110 communication control device, 111 door control device, 112 blower control device, 113 alarm device, 114 door open time setting, 115 door open time record, 116 operation setting, 117 operation record, 118 reflectance acquisition device, 119 reflectance acquisition setting, 120 reflectance acquisition record, 130 center, 131 notification device, 132 memory unit, 133 prediction device, 134 management master, 135 record table, 136 operation table, 140 terminal, 141 receiving and displaying device, 232 memory unit, 234 Management master, 235 Record table, 236 Learning model

Claims

1. An object detection sensor disposed in an elevator car for detecting an object near an entrance / exit of the elevator car; a blower means arranged near the object detection sensor for blowing air toward the object detection sensor; A door control device that controls the opening and closing operation of a car door disposed at the entrance; A blower control device for controlling the operation of the blower means; A record table; Equipped with The blower control device includes: When a state where an object is detected in the vicinity of the entrance by the object detection sensor continues for a period of time equal to or longer than a preset door open time threshold, the blower means is operated to blow air onto the object detection sensor, If the object detection sensor continues to detect an object near the entrance after the blower means is operated, an external terminal is notified that a door opening / closing failure has occurred in the car door; The recording table includes: A blowing start time is a time when the blower means is operated; A record indicating that the cause of the door opening / closing failure confirmed in response to the notification of the occurrence of the door opening / closing failure was dirt on the object detection sensor; and a record indicating that the object is no longer detected by the object detection sensor after the blower means is operated; and Record the The blower control device includes: setting an operation time for operating the blower means based on the information in the recording table; operating the blower means at the operation time; Elevator monitoring system.

2. An object detection sensor disposed in an elevator car and configured to detect an object near an entrance / exit of the elevator car; a blower means arranged near the object detection sensor for blowing air toward the object detection sensor; A door control device that controls the opening and closing operation of a car door disposed at the entrance; A blower control device for controlling the operation of the blower means; Equipped with The blower control device includes: When a state where an object is detected in the vicinity of the entrance by the object detection sensor continues for a period of time equal to or longer than a preset door open time threshold, the blower means is operated to blow air onto the object detection sensor, If the object detection sensor continues to detect an object near the entrance after the blower means is operated, an external terminal is notified that a door opening / closing failure has occurred in the car door; Using a learning model that outputs the presence or absence of dirt on the object detection sensor that may cause a door opening failure of the car door from the current time, predicting whether or not the object detection sensor will be dirty at a time that is a predicted time ahead from the current time, and operating the blower means when it is predicted that the object detection sensor will be dirty; Elevator monitoring system.

3. When an object is detected in the vicinity of an elevator car entrance by an object detection sensor for a period of time longer than a preset door-opening time threshold, a blower means for blowing air onto the object detection sensor is operated to blow air onto the object detection sensor, if the object detection sensor continues to detect an object near the entrance after the blower means is operated, notify an external terminal of a malfunction of the elevator car door; A blowing start time is a time when the blower means is operated; A record indicating that the cause of the door opening / closing failure confirmed in response to the notification of the occurrence of the door opening / closing failure was dirt on the object detection sensor; and a record indicating that the object is no longer detected by the object detection sensor after the blower means is operated; and setting an operation time for operating the blower means based on information in a recording table that records the above, and operating the blower means at the operation time. Elevator monitoring device.

4. When an object is detected in the vicinity of an elevator car entrance by an object detection sensor for a period of time longer than a preset door-opening time threshold, a blower means for blowing air onto the object detection sensor is operated to blow air onto the object detection sensor, if the object detection sensor continues to detect an object near the entrance after the blower means is operated, notify an external terminal of a malfunction of the elevator car door; Using a learning model that outputs the presence or absence of dirt on the object detection sensor that may cause a door opening / closing failure of the car door from the current time, predicting whether or not the object detection sensor will be dirty at a time that is a predicted time ahead from the current time, and operating the blower means when it is predicted that the object detection sensor will be dirty; Elevator monitoring device.

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