Elevator system

Abstract

To prevent degradation of service to users by analyzing reading errors of an absolute positioning system that detects absolute positions.SOLUTION: An elevator system includes an APS tape on which absolute position information is continuously set corresponding to the position of the car in the direction of movement within the elevator shaft, an APS sensor installed on the car and equipped with two cameras that read absolute position information corresponding to the car's position, and an information processing device that processes the absolute position information read by the APS sensor. The two cameras are positioned so that the reading positions of the absolute position information are separated by an offset distance in the direction of movement. The information processing device includes a recording processing unit that records error information including the error position when a reading error occurs in each of the two cameras, and a compilation processing unit that compiles compilation data that associates the error position with the number of errors based on the recorded error information.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure relates to an elevator system equipped with an absolute positioning system that detects the absolute position of an elevator car. [Background technology]

[0002] Patent Document 1 discloses a technique related to an elevator system equipped with a position detection device. The elevator system of this technique includes a first position detector that detects a first detectable object provided at a position corresponding to a floor position, a second position detection unit that detects the absolute position, and an abnormality determination unit that determines an abnormality in the second position detection unit. During normal operation, the abnormality determination unit determines that the second position detector is abnormal if the magnitude of the difference between the floor position calculated from the output values ​​of the second position detector at the time when the first position detector detects the first detectable object and the time when the first position detector finishes detecting the first detectable object and the floor position data stored in a database exceeds an allowable value. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2021 / 002107 Summary of the Invention [Problem to be solved by the invention]

[0004] Absolute positioning systems (APS), which detect the car's absolute position by reading information from tapes installed along the entire length of the elevator shaft with a camera installed on the car, include systems equipped with two cameras positioned a specified offset distance apart in the direction of movement. With such an APS, even if a reading error occurs in one of the cameras due to scratches, dirt, peeling, or other factors caused by aging, the elevator can continue to operate by extrapolating the position information read by the other camera.

[0005] However, in the above-mentioned APS, if a reading error occurs simultaneously in both cameras, it may cause a disruption to elevator operation. For this reason, in elevators equipped with absolute positioning systems, it is desirable to analyze the occurrence of APS reading errors and quickly address reading errors that could result in a deterioration of service to users. The technology in Patent Document 1 can determine position deviation as an abnormality in the position detection device that detects the absolute position, but cannot determine an absolute position reading error.

[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a technology for an elevator system that prevents degradation of service to users by analyzing reading errors in an absolute positioning system that detects absolute positions. [Means for solving the problem]

[0007] The elevator system of the present disclosure comprises a detectable object whose absolute position information is continuously set corresponding to the position of the car in the elevator shaft in the direction of car movement, a detection device equipped with two cameras installed in the car that read absolute position information corresponding to the position of the car, and an information processing device that processes the absolute position information read by the detection device, wherein the detection device has two cameras positioned so that the reading positions of the absolute position information are separated by an offset distance in the direction of movement, and the information processing device comprises a recording processing unit that records error information including the error position when an error occurs in reading the absolute position information in each of the two cameras, and a compilation processing unit that compiles compilation data that associates the number of errors with the error position based on the recorded error information. [Effects of the Invention]

[0008] According to the technology of the present disclosure, degradation of services for users can be prevented by analyzing reading errors of an absolute positioning system that detects absolute positions. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic configuration diagram of an elevator provided in an elevator system according to a first embodiment. [Figure 2] FIG. 2 is a diagram for explaining a configuration example of an APS sensor. [Figure 3] FIG. 2 is a diagram for explaining functional blocks included in the safety control device. [Figure 4] FIG. 2 is a functional block diagram showing functions realized by the information processing device. [Figure 5] FIG. 10 is a diagram illustrating an example of aggregated data. [Figure 6] FIG. 10 is a diagram illustrating an example of aggregated data. [Figure 7] 3 is a flowchart of a routine executed in the elevator system of the first embodiment. [Figure 8] 3 is a flowchart of a routine executed in the elevator system of the first embodiment. [Figure 9] FIG. 10 is a diagram illustrating a modified example of hardware resources in the information processing device of the safety control device. [Figure 10] FIG. 10 is a diagram showing an example of a change in the position of a reading error over time. [Figure 11] FIG. 10 is a functional block diagram showing functions realized by an information processing device of the elevator system of the second embodiment. [Figure 12] FIG. 10 is a diagram illustrating an example of a change over time in an error section. [Figure 13] 10 is a flowchart of a routine executed in the elevator system of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment will be described with reference to the drawings. Note that elements common to the various drawings are given the same reference numerals and redundant explanations will be omitted.

[0011] Embodiment 1 1-1. Schematic configuration of elevator system according to the first embodiment FIG. 1 is a schematic configuration diagram of an elevator provided in an elevator system according to a first embodiment. The elevator of elevator system 100 according to the first embodiment is installed in a facility consisting of a building or the like having multiple floors. An elevator shaft 2 is provided in the facility. The shaft 2 is a vertically long space spanning multiple floors.

[0012] The elevator mainly comprises a hoisting machine 3, a main rope 4, a counterweight 5, an elevator control device 6, a car 8, an absolute positioning system 10, and a safety control device 30. The car 8 travels up and down in the elevator shaft 2, which is the direction of travel, to transport passengers and others inside the car between multiple floors.

[0013] The counterweight 5 moves up and down the hoistway 2. The car 8 and counterweight 5 are suspended in the hoistway 2 by a main rope 4. The main rope 4 is wound around a drive sheave of a hoisting machine 3 installed at the top of the hoistway 2. When the drive sheave rotates, the main rope 4 moves in a direction corresponding to the direction in which the drive sheave rotates. The car 8 rises or falls depending on the direction in which the main rope 4 moves. The movement of the car 8 is guided by a guide rail 9.

[0014] The elevator control device 6 corresponds to a control panel that controls the operation of the elevator. The elevator operation controlled by the elevator control device 6 includes, for example, opening and closing of doors, management of registered calls, running of the car 8 in response to calls, and issuing an alarm when an abnormality occurs.

[0015] The absolute position measurement system 10 functions as an absolute position detection device that detects absolute position information corresponding to the position of the car 8 in the direction of movement in the elevator shaft 2. The absolute position measurement system is also referred to as "APS" hereinafter. The APS 10 includes an APS tape 12 as a detection object and an APS sensor 20 as a detection device.

[0016] The APS tape 12 is a long body arranged along the direction of movement within the hoistway 2. Typically, absolute position information is continuously set on the APS tape 12 corresponding to the position in the direction of movement within the hoistway 2. The absolute position information is set by continuously varying the optical characteristics from the top to the bottom in the vertical direction of the APS tape 12. The absolute position information read from the APS tape 12 is hereinafter also referred to as "APS data." Both ends of the APS tape 12 are fixed under tension by tension locks 14 installed on the guide rails 9. Furthermore, multiple guide clips 16 installed on the guide rails 9 prevent the APS tape 12 from shifting left and right along the length of the tape.

[0017] 2 is a diagram illustrating an example of the configuration of an APS sensor. The APS sensor 20 is a sensor for reading APS data from the APS tape 12. The APS sensor 20 is installed on the car 8 at a position facing the APS tape 12 by a bracket 26.

[0018] The APS sensor 20 includes two cameras, a first camera 22 and a second camera 24, for reading APS data. The first camera 22 and the second camera 24 are positioned so that the APS data reading positions are separated by a specified offset distance in the movement direction. The specified offset distance is, for example, 65±5 mm. The exact offset distance is measured after the APS 10 is installed and stored in a storage device 34 of the safety control device 30, which will be described later. The APS data read by the first camera 22 and the second camera 24 is transmitted to the safety control device 30, which will be described later, via a control cable 7.

[0019] If the APS tape 12 of the APS 10 is damaged by oil splashes from the guide shoe, or is scratched, soiled, or peeled off due to aging, a reading error may occur in the APS sensor 20. The APS sensor 20 has the function of detecting reading errors that occur in the first camera 22 and the second camera 24. When the APS sensor 20 detects a reading error in the first camera 22 or the second camera 24, it transmits error data to the safety control device 30, including information identifying the camera in which the reading error occurred.

[0020] Furthermore, if a reading error occurs in the first camera 22, the APS 10 can detect the absolute position of the car 8 based on the APS data read by the second camera 24. Furthermore, if a reading error occurs in the second camera 24, the APS 10 can detect the absolute position of the car 8 based on the APS data read by the first camera 22. In this way, the APS 10 can detect the absolute position of the car 8 unless a reading error occurs in both the first camera 22 and the second camera 24.

[0021] The safety control device 30 is a control device that is responsible for safety control of the elevator. Fig. 3 is a diagram for explaining the functional blocks of the safety control device. As shown in Fig. 3, the safety control device 30 has, as its functions, an information processing device 32 and a storage device 34.

[0022] The information processing device 32 includes a processor 322 and a memory 324. The processor 322 executes various processes. The processor 322 is, for example, a microcomputer. Various programs and data are stored in the memory 324. Examples of the memory 324 include a volatile memory and a non-volatile memory. The processor 322 executes the various programs, thereby realizing various functions of the information processing device 32. The functions of the information processing device 32 will be described later.

[0023] The storage device 34 is a device that stores various data described below. Examples of the storage device 34 include a volatile memory and a non-volatile memory. The storage device 34 may be configured as a part of the information processing device 32. For example, the storage device 34 may be the memory 324.

[0024] 1-2. Functions of the information processing device 32 4 is a functional block diagram showing functions realized by the information processing device. As shown in this diagram, the information processing device 32 includes functional blocks for executing various processes, such as a data receiving unit 40, a recording processing unit 41, a counting processing unit 42, an extraction processing unit 43, and an alarm determination processing unit 44. Specific processes performed by these functional blocks will be described below.

[0025] 1-2-1. Data reception unit 40 The data reception unit 40 is a functional block that executes processing to receive APS data and error data transmitted from the APS sensor 20 of the APS 10. This processing will be referred to as "data reception processing" hereinafter.

[0026] 1-2-2. Recording processing unit 41 The recording processing unit 41 is a functional block for executing a process of recording error information of the APS data. This process will be referred to as the "recording process" hereinafter. In the recording process, the recording processing unit 41 generates error information based on the error data and the APS data before and after receiving the error data, including error position information, which is the absolute position where the reading error was detected, information for identifying the camera in which the reading error was detected, and the time the error occurred, and records the error information in the storage device 34.

[0027] 1-2-3. Aggregation processing unit 42 The counting processing unit 42 is a functional block for counting data in which the number of errors is associated with each error position, using the error information recorded in the recording processing unit 41. This processing will be referred to as "counting processing" hereinafter.

[0028] Fig. 5 is a diagram showing an example of the aggregated data. In the example shown in this figure, the number of errors for each error position is represented by a bar graph. In Fig. 5, the number of read errors detected by the first camera 22 and the number of read errors detected by the second camera 24 are aggregated as separate bar graphs, but these may be aggregated together, or only the read errors from one of the cameras may be aggregated.

[0029] 1-2-4. Extraction processing unit 43 The extraction processing unit 43 is a functional block for executing a process of extracting error positions where the number of errors in the aggregated data is equal to or exceeds a predetermined number. This process is hereinafter referred to as the "extraction process." The predetermined number here is a threshold value for the number of errors, e.g., two, for distinguishing between read errors caused by factors such as dirt on the APS tape 12 and accidental read errors. The predetermined number is recorded in advance in the storage device 34. The extraction process improves the accuracy of detecting read errors caused by factors such as dirt on the APS tape 12. Note that the predetermined number may be set to one in the extraction process. In this case, all read errors are extracted.

[0030] 1-2-5. Alarm determination processing unit 44 The alarm determination processing unit 44 is a functional block for executing a process to determine whether an alarm needs to be issued to a maintenance technician. This process will be referred to as the "alarm determination process" hereinafter. In the alarm determination process, the alarm determination processing unit 44 calculates the distance between each of the multiple error positions extracted in the extraction process. Then, if the difference between the calculated distance and the offset distance is smaller than a threshold value, the alarm determination processing unit 44 determines that an alarm needs to be issued.

[0031] FIG. 6 is a diagram showing an example of the aggregated data. As shown in the example, if the distance between the error position and the offset position matches, there is a risk that a reading error will be detected by both the first camera 22 and the second camera. In this case, extrapolation using the APS data from either the first camera 22 or the second camera is not possible, so a warning must be issued immediately to a maintenance technician to prompt confirmation and improvement. Therefore, a predetermined threshold value is used as the threshold for determining whether the distance between the error position and the offset position roughly matches.

[0032] If the difference between the calculated separation distance and the offset distance is equal to or greater than a threshold, or if only a single error location is detected as in the example shown in FIG. 5 , the alarm determination processor 44 determines that an alarm is unnecessary because there is no risk of a read error being detected by both the first camera 22 and the second camera. However, since the extracted error location is likely to be the location of contamination on the APS tape 12, it is desirable to check the situation during periodic maintenance inspections. Therefore, the alarm determination processor 44 adds information about the error location for which an alarm is determined not to be necessary to the maintenance inspection list. This process is hereinafter referred to as the "maintenance inspection list addition process." The maintenance inspection list here is a list recording the items to be checked during periodic maintenance inspections, and is stored, for example, in the storage device 34.

[0033] 1-3. Specific processing example of the elevator system according to the first embodiment Next, a specific example of processing executed in the elevator system will be described with reference to a flowchart. Fig. 7 is a flowchart of a routine executed in the elevator system of embodiment 1. The routine shown in Fig. 7 is executed in the information processing device 32 of the safety control device 30 at a predetermined control cycle.

[0034] In step S100, it is determined whether the elevator is running. If the determination is affirmative, the process proceeds to step S102, and if the determination is negative, the process of this routine is terminated.

[0035] In step S102, a data reception process is executed. Here, the data reception unit 40 receives the APS data and error data transmitted from the APS sensor 20. When the process of step S102 is completed, the process proceeds to step S104.

[0036] In step S104, it is determined whether or not error data is included in the data accepted in the data acceptance process of this routine. If the determination is affirmative, the process proceeds to step S106, and if the determination is negative, the process of this routine is terminated.

[0037] In step S106, recording processing is executed. Here, the recording processing unit 41 calculates the error position where the read error was detected based on the APS data before and after receiving the received error data. Then, the recording processing unit 41 generates error information including information on the error position where the read error was detected, information for identifying the camera in which the read error was detected, and the time the error occurred, and records this information in the storage device 34. When the processing of step S106 is completed, the processing of this routine ends.

[0038] By repeatedly executing the routine process shown in FIG.

[0039] Fig. 8 is a flowchart of a routine executed in the elevator system of embodiment 1. The routine shown in Fig. 8 is executed by the information processing device 32 of the safety control device 30 at a predetermined control cycle.

[0040] In step S110, a counting process is executed. Here, the counting unit 42 calculates count data in which the number of errors is associated with each error position using error information during a predetermined counting period. When the process of step S110 is completed, the process proceeds to the next step S112.

[0041] In step S112, extraction processing is executed. Here, the extraction processing unit 43 extracts error positions where the number of errors is equal to or greater than a predetermined number from the aggregated data. When the processing of step S112 is completed, the processing proceeds to the next step S114.

[0042] In steps S114, S116, S118, and S120, an alarm determination process is executed. First, in step S114, the alarm determination processor 44 calculates the distance between each of the plurality of error positions extracted by the extraction process. In the next step S116, the alarm determination processor 44 determines whether the difference between the calculated distance and the offset distance is smaller than a threshold value. As a result, if the determination is found to be successful, the process proceeds to step S118.

[0043] In step S118, the alarm activation determination processing unit 44 determines that an alarm is necessary and transmits an alarm activation command to the elevator control device 6. As a result, the elevator control device 6 receives the alarm activation command and activates an alarm. On the other hand, if the determination in step S116 is not found to be true, the process proceeds to step S120. In step S120, the alarm activation determination processing unit 44 determines that an alarm is unnecessary and executes maintenance inspection list addition processing. Here, the alarm activation determination processing unit 44 adds information about the error location to the maintenance inspection list stored in the storage device 34. When the processing of step S118 or S120 is completed, the processing of this routine ends.

[0044] According to the processing of the elevator system 100 described above, in a situation where a reading error occurs in both the first camera 22 and the second camera 24 of the APS sensor 20, it is possible to quickly alert a maintenance person and prompt them to check and improve the situation.

[0045] 1-4. Variations The elevator system of the first embodiment may employ the following modified aspects. These modified aspects may also be applied to elevator systems of other embodiments described later.

[0046] 1-4-1. Safety control device 30 Fig. 9 is a diagram showing a modified example of the hardware resources in the information processing device 32 of the safety control device 30. In the example shown in Fig. 9, the information processing device 32 includes, for example, a processor 322, a memory 324, and a processing circuit 328 including dedicated hardware 326. Fig. 9 shows an example in which some of the functions of the information processing device 32 are realized by the dedicated hardware 326. All of the functions of the information processing device 32 may be realized by the dedicated hardware 326. As the dedicated hardware 326, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof may be used.

[0047] The safety control device 30 and the elevator control device 6 may be configured as a single control device. In addition, some or all of the functions of the information processing device 32 of the safety control device 30 may be arranged in the elevator control device 6.

[0048] 1-4-3. Alarm determination processing unit 44 The maintenance inspection list addition process executed by the alarm determination processing unit 44 is not an essential process.

[0049] Embodiment 2 In the second embodiment, differences from the example disclosed in the first embodiment will be described in particular detail. For features not described in the second embodiment, any of the features of the example disclosed in the first embodiment may be adopted.

[0050] 2-1. Features of the elevator system according to the second embodiment If oil splashes from the guide shoe onto the APS tape 12, the oil gradually spreads downward, potentially widening the error section of the APS tape 12 over time. Figure 10 shows an example of how the position of a read error changes over time. As shown in this figure, if the length of the error section gradually expands and ultimately reaches the offset distance, both the first camera 22 and the second camera 24 may detect the read error, potentially preventing valid APS data from being transmitted from the APS sensor 20. Therefore, if a change in the position of the read error over time is observed, it is desirable to alert a maintenance technician and urge them to check and correct the problem before it becomes impossible to transmit APS data.

[0051] Therefore, the elevator system of embodiment 2 is characterized by its operation of monitoring changes in the section length of the error section over time and detecting in advance a situation in which a reading error will be detected by both the first camera 22 and the second camera 24.

[0052] Fig. 11 is a functional block diagram showing functions realized by the information processing device of the elevator system according to embodiment 2. As shown in this diagram, the information processing device 32 further includes, as functional blocks for executing various processes, an error section extraction unit 45 and an arrival time calculation unit 46. Specific processes in these functional blocks and the alarm generation determination processing unit 44 will be described below.

[0053] 2-1-1. Error section extraction unit 45 The error section extraction unit 45 is a functional block for executing a process to extract an error section in which the number of errors in the aggregated data for a collection period exceeds a specified number and the error positions continue for a specified length or more. This process is hereinafter referred to as the "error section extraction process." The specified number and specified length here are thresholds pre-recorded in the storage device 34, and are not limited to specific values. For example, the specified number is set to, for example, two errors, as the number of errors required to distinguish between constant read errors caused by dirt on the APS tape 12 and accidental read errors unrelated to dirt. The specified length is set to, for example, 10 mm. The error section extraction process extracts consecutive read errors on the APS tape 12.

[0054] 2-1-2. Arrival time calculation section 46 The arrival time calculation unit 46 is a functional block for calculating the arrival time required for the section length of the error section to reach the offset distance. This process will be referred to as the "arrival time calculation process" hereinafter. In the arrival time calculation process, the arrival time calculation unit 46 compares the error section extracted by the error section extraction process for the aggregated data for the aggregation period from time t1 to time t2 with the error section extracted by the error section extraction process for the aggregated data for the aggregation period from time t1 to time t3 after time t2, and determines whether there is a change over time in the end positions of the error sections.

[0055] Typically, in the arrival time calculation process, the arrival time calculation unit 46 approximately calculates the section length y(x) of the error section x hours after time t3 according to the following equation (1). FIG. 12 is a diagram showing an example of changes in the error section over time. In FIG. 12, (A) in the figure represents the error section at time t2, and (B) in the figure represents the error section at time t3. In addition, in FIG. 12 and the following equation (1), a is the amount of change in the error section over time, and b is the initial value when time x is 0. Furthermore, h1 is the upper end position of the error section at time t2, h2 is the lower end position of the error section at time t2, and h3 is the lower end position of the error section at time t3. y(x)=ax+b (1) Time change a = (h3 - h2) / (t3 - t2) Initial value b=h3-h1

[0056] In the arrival time calculation process, the arrival time calculation unit 46 calculates the time x at which the section length y(x) of the error section calculated in equation (1) matches the offset distance as the arrival time.

[0057] 2-1-3. Alarm determination processing unit 44 In the alarm determination process, the alarm determination processor 44 determines that an alarm needs to be issued when the section length of the error section is equal to or greater than a specified ratio of the offset distance. The specified ratio here is the ratio of the specified distance to the offset distance, and is set to a value smaller than 1, for example, 1 / 2.

[0058] Furthermore, in the alarm determination process, the alarm generation determination processing unit 44 determines that an alarm needs to be generated if the arrival time calculated in the arrival time calculation process is shorter than a specified time. The specified time here is set to, for example, 24 hours.

[0059] 2-2. Specific processing executed in the elevator system of the second embodiment Next, a specific example of processing executed in the elevator system of embodiment 2 will be described with reference to a flowchart. Fig. 13 is a flowchart of a routine executed in the elevator system of embodiment 2. The routine shown in Fig. 13 is periodically executed by the information processing device 32 of the safety control device 30.

[0060] In step S200, a counting process is executed. Here, the counting unit 42 calculates count data in which the number of errors is associated with each error position using error information for a predetermined counting period. The counting period here is, for example, the period up to the start of the current routine. When the process of step S200 is completed, the process proceeds to the next step S202.

[0061] In step S202, the error section extraction unit 45 executes error section extraction processing on the aggregated data aggregated by the aggregation processing, and extracts error sections. When the processing of step S202 is completed, the processing proceeds to the next step S204.

[0062] In step S204, the alarm activation determination processing unit 44 determines whether the error section extracted by the error section extraction processing is smaller than 1 / 2 of the offset distance in the alarm activation determination processing. If the determination is not successful as a result, it is determined that there is a possibility that the error section will reach the offset distance, and the processing proceeds to step S212. In step S212, the alarm activation determination processing unit 44 determines that an alarm needs to be activated, and transmits an alarm activation command to the elevator control device 6. When the processing of step S212 is completed, the processing of this routine ends.

[0063] On the other hand, if the determination in step S204 is found to be successful, the process proceeds to step S206. In step S206, it is determined whether or not there has been a change over time in the end position of the error section. Here, the arrival time calculation unit 46 determines whether or not there has been a change over time in the end position of the error section by comparing the error section extracted during the counting period up to the start of the previous routine with the error section extracted during the counting period up to the start of the current routine. As a result, if the determination is found to be unsuccessful, it is determined that there is no possibility that the error section will reach the offset distance, and the process proceeds to step S214. In step S214, the alarm determination processing unit 44 executes a maintenance inspection list addition process to add information about the error section to the maintenance inspection list stored in the storage device 34. When the process of step S214 is completed, the process of this routine ends.

[0064] On the other hand, if the determination in step S206 is found to be positive, the process proceeds to step S208. In step S208, the arrival time calculation unit 46 executes an arrival time calculation process to calculate the arrival time. Here, the arrival time calculation unit 46 approximately calculates the section length y(x) of the error section by substituting the values ​​into equation (1) assuming that the start time of the previous routine, the upper end position and the lower end position of the error section are t2, h1, and h2, respectively, and the start time of the current routine, the upper end position and the lower end position of the error section are t3, h1, and h3, respectively. Then, the arrival time calculation unit 46 calculates the time x at which the calculated section length y(x) of the error section becomes the offset distance as the arrival time. When the process of step S208 is completed, the process proceeds to step S210.

[0065] In step S210, the alarm determination processing unit 44 executes an alarm determination process to determine whether the arrival time is shorter than a specified time. The specified time here is, for example, 24 hours. If the determination is not successful, the process proceeds to step S214. If the determination is successful, the process proceeds to step S212.

[0066] According to the elevator system processing described above, it is possible to issue a warning to maintenance personnel to prompt them to check and make improvements before the error section changes over time to the point where APS data cannot be transmitted. [Explanation of symbols]

[0067] 2 Hoistway, 3 Hoisting machine, 4 Main rope, 5 Counterweight, 6 Elevator control device, 7 Control cable, 8 Cage, 9 Guide rail, 10 Absolute positioning system (APS), 12 APS tape, 14 Tension lock, 16 Guide clip, 20 APS sensor, 22 First camera, 24 Second camera, 26 Bracket, 30 Safety control device, 32 Information processing device, 34 Storage device, 40 Data reception unit, 41 Recording processing unit, 42 Aggregation processing unit, 43 Extraction processing unit, 44 Alarm determination processing unit, 45 Error section extraction unit, 46 Arrival time calculation unit, 100 Elevator system, 322 Processor, 324 Memory, 326 Dedicated hardware, 328 Processing circuit

Claims

1. a detection object whose absolute position information is continuously set corresponding to the position of the elevator car in the moving direction within the elevator shaft; a detection device provided on the car and including two cameras for reading the absolute position information corresponding to the position of the car; an information processing device that processes the absolute position information read by the detection device, the detection device is configured such that the two cameras are arranged such that the reading positions of the absolute position information are spaced apart by an offset distance in the movement direction; The information processing device includes: a recording processing unit that records error information including an error position when an error occurs in reading the absolute position information in each of the two cameras; a counting processing unit that counts count data in which the number of errors is associated with the error position based on the recorded error information; An elevator system comprising:

2. The information processing device includes: an extraction processing unit that extracts error locations where the number of errors during a collection period is equal to or greater than a specified number from the collection data; 10. The elevator system of claim 1, further comprising:

3. The information processing device includes: The error detection unit further includes an alarm determination unit that determines whether an alarm needs to be issued based on the error position extracted by the extraction unit.

3. The elevator system of claim 2.

4. The alarm determination processing unit A distance between the two error positions extracted by the extraction processing unit is calculated, and it is determined that an alarm needs to be issued if the difference between the calculated distance and the offset distance is smaller than a threshold value.

4. The elevator system according to claim 3, wherein the elevator system is configured as follows:

5. When it is determined that an alarm is not required, the alarm determination processing unit records information about the error position in a maintenance inspection list.

5. The elevator system according to claim 3 or 4, configured as follows:

6. The information processing device includes: an error section extraction unit that extracts, from the aggregated data, a continuous error section in which the number of errors is equal to or greater than a predetermined number; an alarm generation determination processing unit that determines whether or not an alarm needs to be generated based on the length of the error section extracted by the error section extraction unit; 10. The elevator system of claim 1, further comprising:

7. The alarm determination processing unit If the length of the extracted error section is longer than a specified distance that is smaller than the offset distance, it is determined that an alarm needs to be issued.

7. The elevator system according to claim 6, wherein the elevator system is configured as follows:

8. a time-to-arrival calculation unit that calculates a time change in the section length and calculates a time required for the section length to reach the offset distance based on the time change; The alarm determination processing unit If the arrival time is shorter than a specified time, it is determined that an alert is necessary.

7. The elevator system of claim 6, further comprising:

9. When it is determined that an alarm is not required, the alarm determination processing unit records information about the error position in a maintenance inspection list.

9. The elevator system according to claim 6, wherein the elevator system is configured as follows:

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