Deterioration diagnosis system and deterioration diagnosis method for elevator circuit board

Abstract

To provide a deterioration diagnosis system for elevator circuit boards, etc. which can easily and accurately estimate the deterioration time of elevator circuit boards and can easily realize high safety of elevators.SOLUTION: A deterioration diagnosis system 1 includes: a temperature sensor 5 that acquires temperature identification information capable of identifying the temperature of an electrolytic capacitor 11a mounted on a circuit board 6 of an elevator 20; a power supply total counter 2 that acquires total time information capable of identifying the total time that power is supplied to the circuit board 6; a remaining life estimation unit 46b that estimates the remaining life of the electrolytic capacitor 11a based on the temperature identification information and the total time information; a replacement time identification unit 46g that identifies whether the circuit board 6 needs to be replaced based on the remaining life; and a communication unit 42 that outputs information indicating that the circuit board 6 needs to be replaced when the replacement time identification unit 46g identifies that the circuit board 6 needs to be replaced.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a deterioration diagnosis system and a deterioration diagnosis method for an elevator substrate. [Background technology]

[0002] As described in Patent Document 1, the control panel of an elevator includes a control board. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-092202 Summary of the Invention [Problem to be solved by the invention]

[0004] If the deterioration time of the control board can be accurately estimated, the control board can be replaced before it deteriorates. This is of great significance because it can suppress malfunctions of the elevator and achieve high safety. Therefore, an object of the present disclosure is to provide a deterioration diagnosis system and deterioration diagnosis method for an elevator board that can easily and accurately estimate the deterioration time of the elevator board and easily achieve high safety of the elevator. [Means for solving the problem]

[0005] In order to solve the above problems, the deterioration diagnosis system for an elevator circuit board according to the present disclosure includes a temperature information acquisition unit that acquires temperature identification information that can identify (estimate) the temperature of one or more capacitors mounted on an elevator circuit board, a time information acquisition unit that acquires total time information that can identify (estimate) the total time that power is supplied to the circuit board, a remaining life estimation unit that estimates the remaining life of the capacitor based on the temperature identification information and the total time information, a replacement time identification unit that identifies whether or not the circuit board needs to be replaced based on the remaining life, and an output unit that outputs information indicating that the circuit board needs to be replaced when the replacement time identification unit determines that the circuit board needs to be replaced.

[0006] The inventors of the present application have confirmed through an investigation of collected elevator circuit boards (e.g., printed circuit boards constituting control boards) that the lifespan of the circuit boards depends on the lifespan of the capacitors (e.g., electrolytic capacitors) mounted on the circuit boards. More specifically, the lifespan of a circuit board is affected by the limited-life parts (electrolytic capacitors, LEDs, power supplies, etc.) mounted on the circuit boards, but the inventors of the present application have confirmed and ascertained through the results of investigations of collected circuit boards used at the site that the lifespan of the circuit boards is affected by the lifespan of the capacitors.

[0007] According to the present disclosure, the remaining life estimation unit estimates the remaining life of the capacitor based on the temperature identification information and the total time information, and when the replacement time identification unit identifies that the board needs to be replaced based on the estimated remaining life, the output unit outputs information indicating that the board needs to be replaced. Therefore, a person (e.g., a maintenance worker) who recognizes that the board needs to be replaced based on the output can replace the board with a new one. This makes it easier to prevent malfunctions in the elevator and to achieve high elevator safety.

[0008] The replacement time specifying unit may specify whether or not it is time to replace the component by comparing the remaining life with a deterioration threshold value.

[0009] According to this configuration, it is easy to accurately estimate the time to replace the substrate with a simple control.

[0010] The device may also include a warning time determination unit that determines the time to warn by comparing the remaining life with a warning threshold value that is greater than the deterioration threshold value, and when the warning time determination unit determines the time to warn, the output unit may output information indicating that the substrate is approaching the time to replace it.

[0011] According to this configuration, a person can know that the board is nearing the time to replace it before the replacement time actually occurs, so that preparation for board replacement can be done in advance, board replacement can be performed smoothly, and malfunction of the board can be almost certainly prevented.

[0012] In addition, the remaining life estimation unit may calculate an average temperature of the capacitor during a specified period based on a plurality of pieces of temperature identification information acquired at time intervals from each other within the specified period, and estimate the remaining life based on the average temperature.

[0013] According to this configuration, it is easy to accurately estimate the time to replace the substrate with a simple control.

[0014] In addition, the remaining life estimation unit may estimate the remaining life of a plurality of the capacitors, and the replacement time determination unit may determine whether or not the replacement time has arrived based on the shortest remaining life among the plurality of remaining lifes.

[0015] This configuration allows a person to more accurately identify when the board needs replacing. Therefore, malfunctions of the elevator can be reliably prevented, and high elevator safety can be reliably achieved. In this case, one time information acquisition unit is sufficient, but it is preferable to have the same number of temperature information acquisition units as the number of capacitors, and it is preferable to install or place one temperature information acquisition unit for each capacitor.

[0016] The elevator may further include a monitoring device that communicates with a control device that controls a hoist motor of the elevator hoist, the monitoring device including the remaining life estimation unit, the replacement time identification unit, and the output unit, and the output unit may output information indicating that the board needs to be replaced to an information processing device located on a cloud in a communications network.

[0017] An information processing device may store data for multiple (many) elevators. Therefore, if the information processing device were to determine when to replace the board, there is a risk that a heavy load would be placed on the information processing of the information processing device. With this configuration, the determination of when to replace the board is performed by the monitoring device on the elevator side. Therefore, it is possible to prevent a heavy load from being placed on the information processing device that communicates with the elevator monitoring device.

[0018] The remaining life estimation unit may continuously estimate the remaining life at predetermined intervals from an estimation start time to the replacement time.

[0019] According to this configuration, the remaining life data increases as the operating time of the board (the time during which power is supplied to the board) passes. Therefore, it is easy to accurately identify the time to replace the board as the operating time of the board passes.

[0020] The device may also include a memory unit that stores a remaining life curve showing the relationship between the time that power is supplied to the substrate and the remaining life, and the replacement time determination unit may determine whether the replacement time has arrived based on the remaining life curve.

[0021] With this configuration, it is easy to accurately determine when to replace the substrate.

[0022] It is preferable that the remaining life estimation unit continuously estimates the remaining life at predetermined intervals from the estimation start time to the replacement time, and that the unit is provided with a memory unit that stores a remaining life curve showing the relationship between the time that power is supplied to the board and the remaining life, and that the replacement time determination unit determines whether the replacement time has arrived based on the remaining life curve.

[0023] In this case, the remaining life data increases as the operating time of the substrate increases, so the remaining life curve approaches an accurate one as the operating time of the substrate increases. Therefore, the replacement time of the substrate can be accurately identified as the operating time of the substrate increases.

[0024] In addition, the deterioration diagnosis method for an elevator circuit board according to the present disclosure includes the steps of acquiring, for one or more capacitors mounted on an elevator circuit board, temperature identification information capable of identifying the temperature of the capacitor, acquiring total time information capable of identifying the total time that power is supplied to the circuit board, estimating the remaining life of the capacitor based on the temperature identification information and the total time information, identifying whether or not the circuit board needs to be replaced based on the remaining life, and, when it is determined that the circuit board needs to be replaced, outputting information indicating that the circuit board needs to be replaced.

[0025] According to the present disclosure, it is easier to suppress elevator malfunctions and achieve high elevator safety. Effect of the Invention

[0026] According to the elevator substrate deterioration diagnosis system and deterioration diagnosis method disclosed herein, it is easy to accurately estimate the deterioration time of the elevator substrate, making it easy to achieve high elevator safety. [Brief description of the drawings]

[0027] [Figure 1] 1 is a schematic configuration diagram illustrating a deterioration diagnosis system for an elevator substrate according to an embodiment of the present disclosure. FIG. [Diagram 2] 1 is a schematic diagram of a main configuration related to identifying the time to replace a substrate in a degradation diagnosis system. FIG. [Diagram 3] 11 is a diagram illustrating an example of an operation procedure related to output of a replacement time of a board. FIG. [Figure 4] FIG. 1 is a diagram for explaining a method for estimating the lifetime of an electrolytic capacitor according to Arrhenius' law. [Diagram 5] FIG. 4 is a diagram showing an example of a remaining life curve generated by a remaining life curve generating unit; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, when multiple embodiments or modified examples are included below, it is assumed from the beginning that new embodiments will be constructed by appropriately combining the characteristic parts of them. In addition, in the following examples, the same components are given the same symbols in the drawings, and duplicated explanations are omitted. In addition, among the components described below, components that are not described in the independent claims showing the highest concept are optional components and are not essential components.

[0029] FIG. 1 is a schematic diagram illustrating a deterioration diagnosis system 1 for an elevator board 6 according to an embodiment of the present disclosure. As shown in FIG. 1, the deterioration diagnosis system 1 includes a control panel 30 that controls the operation of an elevator 20 having a car 22 arranged in a hoistway 13, a monitoring device 40 that is connected to the control panel 30, for example, by wire or wirelessly, and transmits and receives data between the control panel 30, and a management device 70 that is connected to the monitoring device 40 via a communication network 35, transmits and receives data between the monitoring device 40, and is arranged in an information center 8. The monitoring device 40 is included in the elevator 20. The management device 70 is an example of an information processing device. In FIG. 1, the elevator 20 that exchanges information with the management device 70 is one unit, but the information processing device may exchange information with multiple elevators 20, for example, 100 or more elevators 20.

[0030] Each of the control panel 30, the monitoring device 40, and the management device 70 includes a computer, for example, a microcomputer, and includes a control unit 3a, 46 (see FIG. 2) and a storage unit 3b, 47 (see FIG. 2). The control unit 3a, 46, i.e., the processor, includes, for example, a CPU (Central Processing Unit). The storage unit 3b, 47 may be configured with a hard disk drive (HDD), a solid state drive (SSD), or the like, and may include a non-volatile memory such as a ROM (Read Only Memory) or a volatile memory such as a RAM (Random Access Memory). The storage unit 3b, 47 may be configured with only one storage medium, or may be configured with multiple different storage media. The CPU reads out and executes a program or the like previously stored in the storage unit 3b, 47. The non-volatile memory previously stores a control program, a predetermined threshold value, and the like. The volatile memory temporarily stores the read program and processing data.

[0031] Programs and data (e.g., thresholds, etc.) relating to identifying the replacement time of the board 6 (see FIG. 2), which will be described in detail below, are stored in advance in at least one of the memory units of the control panel 30, the memory unit 47 of the monitoring device 40, and the memory unit of the management device 70. It is particularly preferable that the programs and data relating to identifying the replacement time of the board 6 be stored in advance in the memory unit of the control panel 30 or the memory unit 47 of the monitoring device 40. Note that, although in this embodiment, the board 6 constitutes a control board, the board 6 does not have to be a control board.

[0032] Next, the operation related to identifying the time to replace the board 6 will be described in detail. Fig. 2 is a schematic diagram of the main components related to identifying the time to replace the board 6 in the degradation diagnosis system 1. As shown in Fig. 2, the control panel 30 includes a board (control board) 6, a power switch 7, a power total counter 2 as an example of a time information acquisition section, and a temperature sensor 5 as an example of a temperature information acquisition section. One or more capacitors 11 are mounted on the board 6, and in this embodiment, multiple capacitors 11 are mounted.

[0033] The multiple capacitors 11 may include one or more of a capacitor for smoothing ripples contained in the DC power converted by the rectifier circuit, a capacitor for improving noise resistance of input and output, and a capacitor for providing a relaxation time to the electric circuit. The multiple capacitors 11 may include one or more electrolytic capacitors 11a. In the following embodiment, a case where the remaining life of only one electrolytic capacitor 11a is estimated will be mainly described. However, the capacitor whose remaining life is estimated may be a type of capacitor other than an electrolytic capacitor. Also, as described in a modified example, the remaining life of multiple capacitors may be estimated.

[0034] The power switch 7 supplies power to the substrate 6 or cuts off the power supply to the substrate 6 based on a signal from the control device 3 having a control unit 3a and a storage unit 3b. The power switch 7 may be composed of a switching element, for example, a transistor. The power total counter 2 detects information that can specify the total time that power is supplied to the substrate 6. The power total counter 2 may be composed of a timer, and may be configured to specify the total time that the power switch 7 is controlled to be ON based on information from the control device 3. The power total counter 2 outputs information that can specify the total time that power is supplied to the substrate 6 to the monitoring device 40. The power total counter 2 detects the time that power is supplied to the substrate 6, and as a result, detects the time that the electrolytic capacitor 11a is being used.

[0035] The temperature sensor 5 detects information that can identify the temperature of the electrolytic capacitor 11a. In this embodiment, it is the electrolytic capacitor 11a that the temperature sensor 5 detects the temperature of. The temperature sensor 5 may include, for example, a thermistor element fixed to the electrolytic capacitor 11a. The thermistor element has an electrical resistance that changes depending on the temperature. The thermistor element is electrically connected to the control device 45 of the monitoring device 40 via wiring (lead wire). When the temperature of the thermistor element changes depending on the temperature of the installation location, the resistance value of the thermistor element changes, and the current flowing through the wiring changes.

[0036] The control device 45 detects the current flowing through the wiring to identify the temperature of the electrolytic capacitor 11a. The monitoring device 40 has a switch unit 43, which is composed of a transistor or the like and supplies power to the temperature sensor 5 or cuts off the power supply to the substrate 6. The switch unit 43 is controlled to be turned on and off based on a signal from the control device 45. When the switch unit 43 is controlled to be turned on, a current flows through the thermistor element, and the temperature of the electrolytic capacitor 11a is identified. The temperature sensor may be any sensor capable of detecting the temperature of the electrolytic capacitor 11a, and may be, for example, a thermocouple or a platinum resistance thermometer. The temperature sensor may be directly installed on the electrolytic capacitor 11a, or may be arranged close to the electrolytic capacitor 11a at a distance.

[0037] As shown in Fig. 2, the monitoring device 40 has, in addition to the switch unit 43, an A / D (analog / digital) conversion unit 41, a communication unit 42 as an example of an output unit, and a control device 45. The A / D conversion unit 41 is configured with a known A / D converter. While power is being supplied to the board 6, continuous time data is input from the power supply total counter 2 to the monitoring device 40. In addition, continuous temperature data is input from the temperature sensor 5 to the monitoring device 40. The A / D conversion unit 41 converts analog signals from the power supply total counter 2 and the temperature sensor 5 into digital signals. The A / D conversion unit 41 is necessary because the signals handled by the control device 45 are digital signals.

[0038] The A / D conversion unit 41 divides the analog signal into fixed time intervals and samples (reads) the values, then quantizes the sampled and read values ​​so that they can be converted into a digital signal, and subsequently encodes the quantized values ​​to represent them using a specified number of binary digits, thereby converting the analog signal into a digital signal.

[0039] The communication unit 42 is configured with an interface for transmitting and receiving data to and from an external device, for example, the communication unit of the control panel 30 and the communication unit of the management device 70. The control device 45 has a control unit 46 and a storage unit 47, and the control unit 46 includes a total time determination unit 46a, a remaining life estimation unit 46b, a temperature specification count determination unit 46c, a predetermined time lapse determination unit 46d, a remaining life curve generation unit 46e, a warning time determination unit 46f, and a replacement time determination unit 46g. The operations of the total time determination unit 46a, the remaining life estimation unit 46b, the temperature specification count determination unit 46c, the predetermined time lapse determination unit 46d, the remaining life curve generation unit 46e, the warning time determination unit 46f, and the replacement time determination unit 46g will be described in detail below with reference to FIGS. 3 to 5.

[0040] 3 is a diagram for explaining an example of an operation procedure related to outputting the replacement time of the board 6. When the elevator 20 is newly installed and starts operating, or when the elevator 20 starts operating after the board 6 is replaced, control starts, and in step S1, the total time determination unit 46a determines, based on information from the power supply total counter 2, whether the operating time of the board 6, in other words, the time that power has been supplied to the board 6, has reached or exceeded a predetermined time.

[0041] The electrolytic capacitor 11a has a rated life, which is about 10 years. The rated life is uniquely determined for each product and is usually listed in the product catalog. The above-mentioned predetermined time can be set to, for example, half the rated life, for example, about 5 years. The time when the board operating time reaches the predetermined time is the estimation start time (determination start time) when the control device 45 starts estimating (determining) the remaining life of the electrolytic capacitor 11a. If a negative determination is made in step S1, step S1 is repeated.

[0042] On the other hand, if the result of the determination in step S1 is affirmative, the process proceeds to step S2, where the remaining life estimation unit 46b estimates the remaining life of the electrolytic capacitor 11a. This remaining life estimation is performed by starting software for estimating the remaining life, which is prestored in the storage unit 47. This remaining life estimation is performed, for example, as follows. In detail, the remaining life estimation unit 46b controls the switch unit 43 to turn on, supplies power to the temperature sensor 5, and acquires temperature data from the temperature sensor 5 to identify the temperature. After acquiring the temperature data from the temperature sensor 5, the remaining life estimation unit 46b controls the switch unit 43 to turn off, and cuts off the power to the temperature sensor 5. This operation is performed every second predetermined time, for example, every 10 minutes, during a first predetermined time, for example, one hour, and the average of the identified predetermined number of temperatures, for example, six temperatures, is calculated. Then, the calculated average temperature is identified as the temperature of the electrolytic capacitor 11a at that measurement.

[0043] The remaining life estimation unit 46b estimates the remaining life of the electrolytic capacitor 11a using the specified temperature of the electrolytic capacitor 11a. This remaining life estimation is performed using an estimation formula for the life of an electrolytic capacitor according to the Arrhenius law. As shown in FIG. 4, the maximum operating temperature of the electrolytic capacitor 11a is T [°C], and the operating temperature of the electrolytic capacitor 11a, i.e., the specified temperature, is T 0 [°C], and the life of the electrolytic capacitor 11a at the maximum operating temperature, i.e., the rated life of the electrolytic capacitor 11a, is L 0 [h], the life of the electrolytic capacitor 11a at the operating temperature, that is, the life L [h] of the electrolytic capacitor 11a at the above-specified temperature, is estimated by the following formula (1). L=L 0 ×2 (T-T0) / 10 (1)

[0044] Therefore, the operating time of board 6 is L P [h], the remaining life L of the electrolytic capacitor 11a XThe remaining life estimation unit 46b estimates the remaining life of the electrolytic capacitor 11a using equations (1) and (2). It can be seen from the Arrhenius estimation equation shown in equation (1) that if the operating temperature rises by 10 [°C], the life L [h] of the electrolytic capacitor 11a will be halved, and if the operating temperature drops by 10 [°C], the life L [h] of the electrolytic capacitor 11a will double. The maximum operating temperature T [°C] of the electrolytic capacitor 11a is, for example, 105 [°C]. L X =L 0 ×2 (T-T0) / 10 -L P (2)

[0045] In step S3 after step S2, the temperature determination count determination unit 46c determines whether the number of remaining life estimations of the electrolytic capacitor 11a has reached a predetermined number, for example, 10 or more. If a negative determination is made in step S3, the process proceeds to step S4, in which the predetermined time elapse determination unit 46d determines the previous remaining life L of the electrolytic capacitor 11a based on information from the power supply total counter 2. X It is determined whether a third predetermined time has elapsed since the estimation of the third predetermined time. The third predetermined time may be set to, for example, one week (24×7=168 [h]) or one month (24×30=720 [h]).

[0046] The third predetermined time may start from, for example, the time when the temperature of the electrolytic capacitor 11a was first determined in the previous remaining life estimation. X When it is determined that a third predetermined time has elapsed since the estimation of the remaining life L of the electrolytic capacitor 11a, the remaining life estimation unit 46b uses the above-mentioned estimation method to estimate the remaining life L of the electrolytic capacitor 11a. X Then, the process proceeds to step S3.

[0047] On the other hand, if a positive determination is made in step S3, the process proceeds to step S5, where the remaining life curve generator 46e generates a remaining life curve (deterioration curve) based on all remaining life spans estimated thus far and stored in the memory unit 47. The remaining life curve is generated using a known method, for example, the least squares method, based on all remaining life spans estimated thus far and stored in the memory unit 47. The predetermined number of times in step S3 is set to a number of times that allows the remaining life curve to be generated with a certain degree of accuracy. It is preferable to set the predetermined number of times in step S3 to 10 or more, as this makes it easier to generate the remaining life curve with a certain degree of accuracy.

[0048] Fig. 5 is a diagram (graph) showing an example of a remaining life curve generated by the remaining life curve generating unit 46e. Note that in the example shown in Fig. 5, only two measurement points for estimating the remaining life of the electrolytic capacitor 11a are shown. As shown in Fig. 5, the remaining life curve is a curve showing the relationship between the remaining life time and the operating time of the substrate 6.

[0049] In step S6 after step S5, the warning time specification unit 46f determines the remaining life L X is the warning threshold K T If a negative determination is made in step S6, the process proceeds to step S7, in which the predetermined time elapse determination unit 46d determines whether the previous remaining life L of the electrolytic capacitor 11a has become equal to or less than the predetermined time elapsed based on information from the power supply total counter 2. X The unit 46d for determining whether a third predetermined time has elapsed since the estimation of the remaining life L of the electrolytic capacitor 11a. The third predetermined time may be elapsed from the time when the temperature of the electrolytic capacitor 11a was first specified in the previous estimation of the remaining life L of the electrolytic capacitor 11a. X When it is determined that a third predetermined time has elapsed since the estimation of the remaining life L of the electrolytic capacitor 11a, the remaining life estimation unit 46b uses the above-mentioned estimation method to estimate the remaining life L of the electrolytic capacitor 11a. X Then, the process proceeds to step S5.

[0050] On the other hand, if the determination in step S6 is affirmative, the process proceeds to step S8, where the warning time specification unit 46f causes the communication unit 42 to transmit information indicating that the life of the board 6 has fallen below the warning life to the management device 70 via the communication network 35, and the information is stored in an area in the storage unit of the management device 70 corresponding to the elevator 20. A person, more specifically, a maintenance worker in charge of maintaining the elevator 20, periodically accesses the area in the storage unit of the management device 70 and checks the diagnostic chart of the elevator 20. This diagnostic chart includes information that can specify whether the life of the board 6 has fallen below the warning life. Thus, the maintenance worker can know that the board 6 of the elevator 20 is approaching the time to replace it, and can start preparing to replace the board 6.

[0051] In step S9 after step S8, the predetermined time lapse determining unit 46d determines the previous remaining life L of the electrolytic capacitor 11a based on the information from the power supply total counter 2. X The unit 46d for determining whether a third predetermined time has elapsed since the estimation of the remaining life L of the electrolytic capacitor 11a. The third predetermined time may be elapsed from the time when the temperature of the electrolytic capacitor 11a was first specified in the previous estimation of the remaining life L of the electrolytic capacitor 11a. X When it is determined that a third predetermined time has elapsed since the estimation of the remaining life L of the electrolytic capacitor 11a, the remaining life estimation unit 46b uses the above-mentioned estimation method to estimate the remaining life L of the electrolytic capacitor 11a. X Then, the process proceeds to step S10.

[0052] In step S10, the remaining life curve generator 46e generates a remaining life curve based on all remaining lifespans that have been estimated and stored in the memory unit 47. As in step S5, the remaining life curve is generated using a known method, for example, the least squares method, based on all remaining lifespans that have been estimated and stored in the memory unit 47. The more times the remaining life of the electrolytic capacitor 11a is measured, the more accurate the remaining life curve becomes. Therefore, the remaining life curve generated in step S10 is more accurate than the remaining life curve generated in step S5.

[0053] In step S11 after step S10, the replacement time specifying unit 46g determines the remaining life L of the electrolytic capacitor 11a. X is the deterioration threshold (replacement threshold) R T ( <K T ) (see FIG. 5). If a negative determination is made in step S11, step S9 and subsequent steps are repeated. On the other hand, if a positive determination is made in step S11, the process proceeds to step S12, where the replacement time identification unit 46g causes the communication unit 42 to transmit information indicating that the life of the substrate 6 has expired and that it is time for the substrate 6 to be replaced to the management device 70 via the communication network 35, and the information is stored in an area in the memory unit of the management device 70 that corresponds to the elevator 20. This allows a person (maintenance worker) who accesses that area to know that it is time for the substrate 6 to be replaced. When step S12 is completed, the control ends.

[0054] As described above, the deterioration diagnosis system 1 includes, for one or more capacitors 11 (in this embodiment, one electrolytic capacitor 11a) mounted on the substrate 6 of the elevator 20, a temperature information acquisition unit (temperature sensor 5) that acquires temperature identification information capable of identifying the temperature of the electrolytic capacitor 11a, a time information acquisition unit (power supply total counter 2) that acquires total time information capable of identifying the total time that power is supplied to the substrate 6, a remaining life estimation unit 46b (control device 45) that estimates the remaining life of the electrolytic capacitor 11a based on the temperature identification information and the total time information, a replacement time identification unit 46g (control device 45) that identifies whether the substrate 6 needs to be replaced based on the remaining life, and an output unit (communication unit 42) that outputs information indicating that the substrate 6 needs to be replaced when the replacement time identification unit 46g identifies that the substrate 6 needs to be replaced.

[0055] Conventionally, there has been no technical idea of ​​identifying the life of a capacitor (eg, electrolytic capacitor 11a) with the life of a substrate 6 and encouraging replacement of the substrate 6 based on the life of the capacitor, and no such system has existed.

[0056] In this context, the present inventor, as a result of recalling and investigating a board (e.g., a printed circuit board constituting a control board) 6 of an elevator 20 used at the site, confirmed and found for the first time that the life of the board 6 depends on the life of a capacitor 11 (e.g., electrolytic capacitor 11a) mounted on the board 6. More specifically, the life of the board 6 is affected by the parts with a finite life (e.g., electrolytic capacitor, LED, power supply device, etc.) mounted on the board 6, but from the results of the recall investigation, the present inventor confirmed and found for the first time that the life of the board 6 is affected by the life of the capacitor 11 among the parts with a finite life.

[0057] According to the present disclosure, the remaining life estimation unit 46b estimates the remaining life of the electrolytic capacitor 11a based on the temperature identification information and the total time information, and when the replacement time identification unit 46g identifies that it is time to replace the board 6 based on the remaining life, the communication unit 42 outputs information indicating that it is time to replace the board 6. Therefore, a person (e.g., a maintenance worker) who recognizes that it is time to replace the board 6 based on the output can replace the board 6 with a new one. This makes it easier to prevent malfunctions of the elevator 20 and to achieve high safety of the elevator 20.

[0058] In addition, the replacement time specification unit 46g (control device 45) determines the remaining life of the electrolytic capacitor 11a based on a deterioration threshold value R T It is also possible to determine whether or not it is time to replace the battery by comparing the battery with the battery.

[0059] According to this configuration, it is easy to accurately estimate the replacement time of the substrate 6 through simple control.

[0060] In addition, the remaining life of the electrolytic capacitor 11a is determined based on the degradation threshold value R T A warning threshold K greater than T The control device 45 may be provided with a warning time determination unit 46f (control device 45) that determines the time to warn by comparing the warning time with the above, and when the warning time determination unit 46f determines the time to warn, the communication unit 42 may output information indicating that the substrate 6 is approaching the time to replace it.

[0061] According to this configuration, a person can know that the time to replace the board 6 is approaching before the time actually comes. Therefore, preparation for replacing the board 6 can be done in advance, and the replacement of the board 6 can be smoothly performed, so that malfunction of the board 6 can be almost certainly prevented.

[0062] In addition, remaining life estimation unit 46b (control device 45) may calculate the average temperature of electrolytic capacitor 11a during a specified period based on multiple pieces of temperature identification information acquired at time intervals within a specified period, and estimate the remaining life of electrolytic capacitor 11a based on the average temperature.

[0063] According to this configuration, it is easy to accurately estimate the replacement time of the substrate 6 through simple control.

[0064] The elevator 20 may also be provided with a monitoring device 40 that communicates with a control device 3 that controls the hoist motor of the hoist, and the monitoring device 40 may include a remaining life estimation unit 46b (control device 45), a replacement time identification unit 46g (control device 45), and an output unit (communication unit 42), and the communication unit 42 may output information indicating that the board 6 needs to be replaced to an information processing device (management device 70) located on the cloud of the communication network 35.

[0065] The management device 70 may store data on a plurality (large number) of elevators 20. Therefore, if the management device 70 were to determine when to replace the board 6, there is a risk that a large load would be placed on the information processing of the management device 70. According to this configuration, the determination of when to replace the board 6 is performed by the monitoring device 40 on the elevator side. Therefore, it is possible to prevent a large load from being placed on the management device 70, which communicates with the monitoring device 40 of the elevator 20.

[0066] In addition, the remaining life estimation unit 46b (control device 45) may continuously estimate the remaining life of the electrolytic capacitor 11a at predetermined intervals (e.g., 168 hours or 720 hours) from the estimation start time (the time when the board operating time reaches a predetermined time in step S1 of FIG. 3) to the replacement time.

[0067] According to this configuration, the remaining life data of the electrolytic capacitor 11a increases as the operating time of the substrate 6 (the time during which power is supplied to the substrate 6) elapses. Therefore, it is easy to accurately identify the time to replace the substrate 6 as the operating time of the substrate 6 elapses.

[0068] In addition, a memory unit 47 may be provided that stores a remaining life curve showing the relationship between the time for which power is supplied to the substrate 6 and the remaining life of the electrolytic capacitor 11a, and the replacement time determination unit 46g (control device 45) may determine whether or not it is time to replace the electrolytic capacitor 11a based on the remaining life curve.

[0069] According to this configuration, it is easy to accurately determine when to replace the substrate 6.

[0070] It is preferable that the remaining life estimation unit 46b continuously estimates the remaining life at predetermined intervals from the estimation start time to the replacement time, and that the memory unit 47 stores a remaining life curve showing the relationship between the time for which power is supplied to the substrate 6 and the remaining life, and that the replacement time determination unit 46g determines whether or not it is time to replace the substrate based on the remaining life curve.

[0071] In this case, the remaining life data increases as the operating time of the substrate 6 passes, so the remaining life curve approaches an accurate one as the operating time of the substrate 6 passes. Therefore, the replacement time of the substrate 6 can be accurately identified as the operating time of the substrate 6 passes.

[0072] In addition, the deterioration diagnosis method for a board 6 disclosed herein includes the steps of acquiring, for one or more electrolytic capacitors 11a mounted on the board 6 of an elevator 20, temperature identification information capable of identifying the temperature of the electrolytic capacitor 11a, acquiring total time information capable of identifying the total time during which power is supplied to the board 6, estimating the remaining life of the electrolytic capacitor 11a based on the temperature identification information and the total time information, identifying whether or not the board 6 needs to be replaced based on the remaining life, and, when it is determined that the board 6 needs to be replaced, outputting information indicating that the board 6 needs to be replaced.

[0073] According to the present disclosure, it is easy to suppress malfunctions of the elevator 20 and to achieve high safety of the elevator 20.

[0074] The degradation diagnosis system 1 of the embodiment has been described in detail above, but the main points of the degradation diagnosis system 1 of the embodiment can be summarized as follows.

[0075] Degradation diagnosis system 1 monitors the state of electrolytic capacitor 11a among the components mounted on the printed circuit board, inputs the component surface temperature of electrolytic capacitor 11a as data into monitoring device 40, and also inputs the operating time of said circuit board 6 as data. Then, degradation diagnosis system 1 derives a remaining life curve for electrolytic capacitor 11a from the acquired data, calculates the remaining life of electrolytic capacitor 11a, which is identified as the remaining life of circuit board 6, and recommends replacement of the circuit board itself based on the remaining life.

[0076] In the deterioration diagnosis system 1, the remaining life time of the electrolytic capacitor 11a is calculated periodically (for example, once a week or once a month) using the monitoring device 40, and the remaining life time is compared with the deterioration threshold value (replacement time) R T When this occurs, a notification that it is time to replace the board 6 is sent to the management device 70 installed in the information center 8. The degradation diagnosis system 1 sends the notification in the following steps (1) to (3).

[0077] (1) When the board is mounted, the power supply total counter 2 starts operating and records the operating time in the memory unit (recording unit) 47 as soon as the power supply is turned on. (2) The surface temperature of the electrolytic capacitor 11a is detected by the temperature sensor 5, and the average temperature of the capacitor surface temperature calculated by the control device (calculation unit) 45 is substituted into the electrolytic capacitor life formula (Arrhenius formula), and the remaining life time is estimated from the difference between the operating time and the capacitor life time. (3) The estimated remaining life time is equal to or less than the preset deterioration threshold R T When this is reached, an alarm will be sounded prompting the replacement of the board.

[0078] According to the deterioration diagnostic system 1, the substrate 6 can be replaced at an appropriate replacement period for each site. Furthermore, the occurrence of an alarm allows the substrate 6 to be replaced reliably without missing the timing for substrate replacement.

[0079] The present disclosure is not limited to the above-described embodiment and its modified examples, and various improvements and modifications are possible within the scope of the claims of the present application and their equivalents.

[0080] For example, in the above embodiment, the warning threshold K T However, the warning threshold K T Without using the degradation threshold R T The time to replace the substrate 6 may be estimated directly using only the above.

[0081] Also, a case has been described in which remaining life estimation unit 46b calculates an average of a predetermined number of temperatures of electrolytic capacitor 11a when estimating the remaining life of electrolytic capacitor 11a each time, and estimates the remaining life of electrolytic capacitor 11a based on the average temperature. However, the remaining life estimation unit does not need to calculate an average of a predetermined number of temperatures of the capacitor when estimating the remaining life of the capacitor each time, and may estimate the remaining life of the capacitor based on a single temperature determination of the capacitor.

[0082] Also, the case where the monitoring device 40 includes the remaining life estimation unit 46b (control device 45), the replacement time identification unit 46g (control device 45), and the output unit (communication unit 42) has been described. However, the control panel 30 may include the remaining life estimation unit, the replacement time identification unit, and the output unit. Alternatively, the management device 70 arranged in the information center 8 may include the remaining life estimation unit, the replacement time identification unit, and the output unit. Also, the control device of the management device 70 may constitute the remaining life estimation unit and the replacement time identification unit, and the display unit 71 (see FIG. 1) included in the management device 70 and constituted by a liquid crystal panel, an organic EL panel, or the like may constitute the output unit. Then, the display unit 71 may display and output information indicating that it is time to replace the board 6.

[0083] Also, the above description deals with a case where the time to replace the board 6 is estimated based on the remaining life of one electrolytic capacitor 11a mounted on the board 6. However, the remaining life estimation unit may estimate the remaining life of a plurality of capacitors, and the replacement time specifying unit may specify whether or not the board needs to be replaced based on the shortest remaining life of the plurality of capacitors.

[0084] This configuration allows a person to more accurately identify when the board needs to be replaced. Therefore, malfunctions of the elevator can be reliably prevented, and high elevator safety can be reliably achieved. In this case, only one time information acquisition unit is required, but it is preferable that there are the same number of temperature information acquisition units as the number of capacitors, and that one is directly installed on each capacitor, or one is placed close to each capacitor at an interval.

[0085] Also, a case has been described in which information representing that it is time to replace the board 6 is output to the management device 70 of the information center 8. However, the information representing that it is time to replace the board 6 may be output to an information processing device other than the management device 70, and may be output, for example, via the management device 70 to an information terminal (e.g., a smartphone or a laptop computer) carried by a person (e.g., a maintenance worker in charge of maintaining the elevator 20), or may be output to an information terminal carried by a person without passing through the management device 70.

[0086] In addition, the case where the replacement time of the substrate 6 is specified by using the remaining life curve shown in Fig. 5 has been described. However, it is not necessary to use the remaining life curve. It is possible to simply periodically calculate the remaining life of the electrolytic capacitor 11a and to check whether the calculated remaining life is greater than the degradation threshold value R T It may be determined that the substrate 6 needs to be replaced when:

[0087] Also, the case has been described where the time information acquisition unit that acquires the total time information that can specify the total time during which power is supplied to the board 6 is configured with the power supply total counter 2. However, the total time may be specified based on any physical quantity that has a one-to-one correlation therewith. The time information acquisition unit may acquire, for example, one or more of the driving time of the hoist motor, the driving time of the car door motor, the lighting time of the lighting device in the car room, the driving time of the air conditioner that conditions the air in the car room, the time during which the weighing device detects that there is a person in the car room, the time during which the light-emitting device that lights up the car call button installed at the landing is emitting light, and the time during which any of the light-emitting devices that light up the destination floor designation button installed in the car room is emitting light. Then, the total time during which power is supplied to the board 6 may be specified based on the one or more times.

[0088] In addition, the deterioration diagnosis system for an elevator substrate according to the present disclosure may have the following configuration. Configuration 1: A deterioration diagnosis system for an elevator circuit board, comprising: a temperature information acquisition unit that acquires temperature identification information capable of identifying the temperature of one or more capacitors mounted on an elevator circuit board; a time information acquisition unit that acquires total time information capable of identifying the total time that power is supplied to the circuit board; a remaining life estimation unit that estimates the remaining life of the capacitor based on the temperature identification information and the total time information; a replacement time identification unit that identifies whether the circuit board needs to be replaced based on the remaining life; and an output unit that outputs information indicating that the circuit board needs to be replaced when the replacement time identification unit determines that the circuit board needs to be replaced. Configuration 2: The deterioration diagnosis system for an elevator substrate as described in configuration 1, wherein the replacement time identification unit identifies whether or not it is time to replace the substrate by comparing the remaining life with a deterioration threshold value. Configuration 3: A deterioration diagnosis system for an elevator circuit board as described in Configuration 2, further comprising a warning time identification unit that identifies the time to issue a warning by comparing the remaining life with a warning threshold value that is greater than the deterioration threshold value, and when the warning time identification unit identifies the time to issue a warning, the output unit outputs information indicating that the circuit board is approaching the time to replace it. Configuration 4: A deterioration diagnosis system for an elevator substrate described in any one of configurations 1 to 3, wherein the remaining life estimation unit calculates an average temperature of the capacitor during a specified period based on a plurality of pieces of temperature identification information acquired at time intervals from each other within the specified period, and estimates the remaining life based on the average temperature. Configuration 5: A deterioration diagnosis system for an elevator substrate described in any one of configurations 1 to 4, wherein the remaining life estimation unit estimates the remaining life of a plurality of the capacitors, and the replacement time determination unit determines whether or not the replacement time has arrived based on the shortest remaining life among the plurality of remaining lifes. Configuration 6: A deterioration diagnosis system for an elevator circuit board described in any one of configurations 1 to 5, comprising a monitoring device that communicates with a control device that controls a hoist motor of the elevator hoist, the monitoring device including the remaining life estimation unit, the replacement time identification unit, and the output unit, and the output unit outputs information indicating that the circuit board needs to be replaced to an information processing device located on a cloud of a communication network. Configuration 7: A deterioration diagnosis system for an elevator substrate described in any one of configurations 1 to 6, wherein the remaining life estimation unit continuously estimates the remaining life at predetermined intervals from the estimation start time to the replacement time. Configuration 8: A deterioration diagnosis system for an elevator board described in any one of configurations 1 to 7, further comprising a memory unit that stores a remaining life curve showing the relationship between the time for which power is supplied to the board and the remaining life, and the replacement time determination unit determines whether the replacement time has arrived based on the remaining life curve. [Explanation of symbols]

[0089] 1 Deterioration diagnosis system, 2 Power supply total counter, 3 Control device, 3a Control unit, 3b Memory unit, 5 Temperature sensor, 6 Board, 7 Power switch, 8 Information center, 11 Capacitor, 11a Electrolytic capacitor, 13 Hoistway, 20 Elevator, 22 Cage, 30 Control panel, 35 Communication network, 40 Monitoring device, 41 Conversion unit, 42 Communication unit, 43 Switch unit, 45 Control device, 46 Control unit, 46a Total time determination unit, 46b Remaining life estimation unit, 46c Temperature determination number determination unit, 46d Predetermined time lapse determination unit, 46e Remaining life curve generation unit, 46f Warning time determination unit, 46g Replacement time determination unit, 47 Memory unit, 70 Management device, 71 Display unit, K T Warning threshold, L Electrolytic capacitor life, L X Remaining life of electrolytic capacitor, R T Degradation threshold.

Claims

1. A temperature information acquisition unit that acquires temperature identification information for identifying a temperature of one or more capacitors mounted on a board of the elevator; a time information acquisition unit that acquires total time information that can identify the total time during which power is supplied to the board; a remaining life estimation unit that estimates a remaining life of the capacitor based on the temperature identification information and the total time information; a replacement time determination unit that determines whether or not the substrate needs to be replaced based on the remaining life; an output unit that outputs information indicating that the substrate needs to be replaced when the replacement time specifying unit specifies that the substrate needs to be replaced; A deterioration diagnosis system for elevator substrates.

2. The elevator substrate deterioration diagnosis system according to claim 1 , wherein the replacement time determination unit determines whether or not it is time to replace the substrate by comparing the remaining life with a deterioration threshold value.

3. a warning time determination unit that determines a warning time by comparing the remaining life with a warning threshold value that is greater than the deterioration threshold value; The deterioration diagnosis system for an elevator circuit board according to claim 2 , wherein when the warning time identification unit identifies the warning time, the output unit outputs information indicating that the circuit board is approaching a time to be replaced.

4. 4. The elevator board deterioration diagnosis system according to claim 1, wherein the remaining life estimation unit calculates an average temperature of the capacitor during a specified period based on a plurality of pieces of temperature identification information acquired at time intervals from each other within the specified period, and estimates the remaining life based on the average temperature.

5. The remaining life estimation unit estimates remaining lives of the plurality of capacitors, 4. The elevator board deterioration diagnosis system according to claim 1, wherein the replacement time determination unit determines whether the replacement time has arrived based on the shortest remaining life among the plurality of remaining lifes.

6. A monitoring device that communicates with a control device that controls a hoist motor of the elevator hoist, the monitoring device includes the remaining life estimation unit, the replacement time identification unit, and the output unit, The deterioration diagnosis system for an elevator substrate as described in any one of claims 1 to 3, wherein the output unit outputs information indicating that the substrate needs to be replaced to an information processing device located on a cloud of a communication network.

7. 4. The elevator substrate deterioration diagnosis system according to claim 1, wherein the remaining life estimation unit continuously estimates the remaining life at predetermined intervals from an estimation start time to the replacement time.

8. a storage unit that stores a remaining life curve that indicates a relationship between a time during which power is supplied to the board and the remaining life, 4. The elevator substrate deterioration diagnosis system according to claim 1, wherein the replacement time specification unit specifies whether or not the replacement time has arrived based on the remaining life curve.

9. obtaining temperature identifying information for one or more capacitors mounted on a board of the elevator, the temperature identifying information being capable of identifying a temperature of the capacitor; obtaining total time information that identifies the total time that power is supplied to the board; estimating a remaining life of the capacitor based on the temperature specific information and the total time information; determining whether the substrate needs to be replaced based on the remaining life; When it is determined that the substrate needs to be replaced, outputting information indicating that the substrate needs to be replaced; A deterioration diagnosis method for an elevator substrate, comprising:

Images