Condition diagnosis device

Abstract

To diagnose the state of an object to be diagnosed by efficiently communicating with a plurality of sensor units.SOLUTION: A state diagnosis device 1 includes: a plurality of first microphone parts 11; first microphone relays 21; a first Ethernet hub 31; and a state diagnosis part 40. The plurality of first microphone parts 11 are connected to each other in a daisy chain connection manner. The first microphone relays 21 are connected to the first microphone parts 11. The first microphone relays 21 are connected to the first Ethernet hub 31 together with another second microphone relay 22 in a star connection manner. The first Ethernet hub 31 is connected to the state diagnosis part 40 in a cascaded manner together with another second Ethernet hub 32.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a condition diagnosis device that diagnoses the condition of an object to be diagnosed. [Background technology]

[0002] For example, Patent Document 1 describes a system for monitoring the state of a conveyor. When monitoring such a long conveyor, it is necessary to provide multiple sensors that detect the state of the conveyor along the direction in which the conveyor extends. For this reason, Patent Document 1 describes connecting the multiple sensors to each other in a daisy chain configuration. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-183307 Summary of the Invention [Problem to be solved by the invention]

[0004] Here, the longer the object to be diagnosed, such as a conveyor, the more sensors must be provided. When providing such a large number of sensors, there is room for improvement in the communication connection method between these sensors and a processing unit that processes the information detected by the sensors.

[0005] Therefore, an object of the present invention is to provide a condition diagnosis device that can efficiently communicate between a diagnosis unit that performs diagnostic processing and multiple sensor units, and more appropriately diagnose the condition of an object to be diagnosed. [Means for solving the problem]

[0006] One aspect of the present invention is a condition diagnosis device that diagnoses the condition of a diagnosis object extending along a predetermined direction, the condition diagnosis device including a plurality of first sensor units connected to each other by a first sensor cable and detecting the condition of the diagnosis object, a plurality of second sensor units connected to each other by a second sensor cable and detecting the condition of the diagnosis object, a plurality of third sensor units connected to each other by a third sensor cable and detecting the condition of the diagnosis object, a plurality of fourth sensor units connected to each other by a fourth sensor cable and detecting the condition of the diagnosis object, a first relay connected to at least one of the plurality of first sensor units by a first intermediate cable, a second relay connected to at least one of the plurality of second sensor units by a second intermediate cable, a third relay connected to at least one of the plurality of third sensor units by a third intermediate cable, a fourth relay connected to at least one of the plurality of fourth sensor units by a fourth intermediate cable, a first communication hub connected to the first relay by the first relay cable and connected to the second relay by the second relay cable, and a communication hub connected to the third relay by the third relay cable and connected to the fourth relay cable. a second communication hub connected to the fourth repeater; and a diagnostic unit connected to the first communication hub and the second communication hub by a communication cable, and configured to diagnose the state of an object to be diagnosed based on at least one of detection information of the first sensor unit, detection information of the second sensor unit, detection information of the third sensor unit, and detection information of the fourth sensor unit, wherein the plurality of first sensor units are connected to one another in a daisy chain or bus type connection by the first sensor cable, the plurality of second sensor units are connected to one another in a daisy chain or bus type connection by the second sensor cable, and the plurality of third sensor units are connected to one another in a daisy chain or bus type connection by the second sensor cable. the plurality of sensor units are connected to one another in a daisy chain or bus type connection by a third sensor cable, the plurality of fourth sensor units are connected to one another in a daisy chain or bus type connection by a fourth sensor cable, the first repeater and the second repeater are connected to the first communication hub in a star type connection by a first relay cable and a second relay cable, respectively, the third repeater and the fourth repeater are connected to the second communication hub in a star type connection by a third relay cable and a fourth relay cable, respectively, and the first communication hub and the second communication hub areIt is connected to the diagnostic unit in a cascade connection manner by a communication cable.

[0007] In this condition diagnosis device, each device, such as a first sensor unit provided to diagnose the condition of an object to be diagnosed, is connected in a daisy chain, bus, star, or cascade configuration. This allows the condition diagnosis device to appropriately transmit detection information from the multiple sensor units to the diagnosis unit, for example, by suppressing degradation of the detection information from the sensor units. In this way, the condition diagnosis device efficiently communicates between the diagnosis unit, which performs diagnostic processing, and the multiple sensor units, allowing for more appropriate diagnosis of the condition of the object to be diagnosed.

[0008] In the above condition diagnosis device, the first relay may have a first sensor connecting portion and a second sensor connecting portion as connecting portions with the first sensor unit, and the first intermediate cable may have a first cable and a second cable. Among the plurality of first sensor units, a first group of first sensor units including one or more first sensor units may be connected to the first sensor connecting portion via the first cable, and a second group of first sensor units including one or more first sensor units different from the first sensor units of the first group may be connected to the second sensor connecting portion via the second cable. In this case, even when a plurality of first sensor units are provided, the condition diagnosis device can connect these first sensor units to the first relay while preventing the length of the first intermediate cable (first cable, second cable) from increasing. This allows the condition diagnosis device to more appropriately transmit the detection information of the first sensor unit to the diagnosis unit, for example, by preventing degradation of the detection information of the first sensor unit.

[0009] In the above-described condition diagnosis device, the object to be diagnosed may be a conveyor extending in the conveying direction of the conveyed object, and the plurality of first sensor units and the first relay may be arranged on one side of the conveyor, and the plurality of second sensor units, the second relay, and the first communication hub may be arranged on the other side of the conveyor. In this case, even if the first sensor units and the second sensor units are arranged on both sides of the conveyor, the condition diagnosis device can transmit detection information of the plurality of first sensor units to the side where the first communication hub is installed simply by installing a first relay cable that passes above or below the conveyor. In this way, this condition diagnosis device can reduce the number of cables crossing the conveyor. [Effects of the Invention]

[0010] According to one aspect of the present invention, efficient communication can be achieved between a diagnostic unit that performs diagnostic processing and a plurality of sensor units, thereby more appropriately diagnosing the state of an object to be diagnosed. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a condition diagnosis device according to an embodiment. [Figure 2] FIG. 2 is a diagram showing a connection state between the first microphone repeater and a plurality of first microphone units. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0013] As shown in Fig. 1, a condition diagnosis device 1 according to this embodiment diagnoses the condition of a conveyor 100 (object to be diagnosed) that conveys an object. The conveyor 100 is long (for example, several hundred meters) and extends in the conveying direction of the object (direction indicated by arrow A). The condition diagnosis device 1 diagnoses the condition of each part of the conveyor 100 in the extending direction.

[0014] The condition diagnostic device 1 includes a plurality of microphone units 10, a plurality of microphone repeaters 20, a plurality of Ethernet hubs 30 (Ethernet: a registered trademark), a condition diagnostic unit (diagnostic unit) 40, and a plurality of cables C connecting these. The following describes the configuration around a first Ethernet hub (first communication hub) 31 and a second Ethernet hub (second communication hub) 32, which are part of the plurality of Ethernet hubs 30, as representative examples.

[0015] First, the configuration around the first Ethernet hub 31 will be described. The condition diagnostic device 1 includes a first microphone repeater 20 as a plurality of microphone repeaters 20 directly connected to the first Ethernet hub 31. (First repeater) 21, second microphone repeater 22, third microphone repeater (Second repeater) The first Ethernet hub 31 includes a first microphone repeater 21, a second microphone repeater 22, and a fourth microphone repeater 24. The number of microphone repeaters 20 directly connected to the first Ethernet hub 31 is not limited to four, i.e., the first microphone repeater 21 to the fourth microphone repeater 24.

[0016] The condition diagnosis device 1 also includes a plurality of first microphone units (first sensor units) 11 as microphone units 10 directly connected to the first microphone repeater 21. Similarly, the condition diagnosis device 1 also includes a plurality of second microphone units 12 as microphone units 10 directly connected to the second microphone repeater 22. The condition diagnosis device 1 also includes a plurality of third microphone units (second sensor units) 13 as microphone units 10 directly connected to the third microphone repeater 23. The condition diagnosis device 1 also includes a plurality of fourth microphone units 14 as microphone units 10 directly connected to the fourth microphone repeater 24.

[0017] In this embodiment, eight of each of the first microphone units 11 to fourth microphone units 14 are provided. However, the number of each of the first microphone units 11 to fourth microphone units 14 is not limited to eight. For example, if a large number of microphone units 10 are connected to one microphone repeater 20, the length of the cable increases, which may result in a decrease in communication speed. For this reason, the number of first microphone units 11 to fourth microphone units 14 may be, for example, such that a communication speed can be ensured.

[0018] The plurality of first microphone units 11, the plurality of second microphone units 12, the first microphone repeater 21, and the second microphone repeater 22 are arranged on one side 100a of the conveyor 100. The plurality of third microphone units 13, the plurality of fourth microphone units 14, the third microphone repeater 23, the fourth microphone repeater 24, and the first Ethernet hub 31 are arranged on the other side 100b of the conveyor 100. In other words, the first microphone units 11 and the second microphone units 12, and the third microphone units 13 and the fourth microphone units 14 are arranged on both sides of the conveyor 100 (the left and right sides of the conveyor 100), respectively.

[0019] First, the connection state between the multiple first microphone units 11 and the first microphone repeater 21 will be described. As shown in Fig. 2, the first microphone unit 11 detects the state of the conveyor 100. In this embodiment, the first microphone unit 11 detects sounds generated by the conveyor 100 (for example, sounds generated by rollers provided on the conveyor 100) as the state of the conveyor 100. The first microphone unit 11 can transmit the detected information to the state diagnosis unit 40. The first microphone unit 11 includes, for example, a microphone which is a sensor for detecting sounds, an A / D converter (analog / digital converter), and a communication unit for performing communication.

[0020] The condition diagnosis device 1 includes a first microphone cable (first sensor cable) C11 and a first microphone repeater cable (first intermediate cable) C21 as the cables C. The first microphone units 11 are connected to one another in a daisy chain manner by the first microphone cables C11. The first microphone repeater 21 is connected to at least one of the first microphone units 11 by the first microphone repeater cable C21. The first microphone units 11 and the first microphone repeater 21 may communicate with each other by, for example, serial communication.

[0021] Here, the multiple first microphone units 11 are divided into a first group G1 including one or more first microphone units 11 and a second group G2 including one or more first microphone units 11 different from the first microphone units 11 in the first group G1. In this embodiment, the first group G1 and the second group G2 each include four first microphone units 11. The four first microphone units 11 in the first group G1 are connected to each other in a daisy chain manner by a first microphone cable C11. The four first microphone units 11 in the second group G2 are connected to each other in a daisy chain manner by a first microphone cable C11.

[0022] First microphone repeater 21 has first sensor connection portion 21a and second sensor connection portion 21b as connection portions with first microphone unit 11. In other words, first microphone repeater 21 has two channels for communicating with first microphone unit 11. First microphone repeater cable C21 has a first cable C21a and a second cable C21b.

[0023] One of the first microphone units 11 in the first group G1 is connected to the first sensor connection unit 21a of the first microphone repeater 21 via a first cable C21a. The first cable C21a connects the first microphone unit 11 located at one end of the daisy chain connection among the multiple first microphone units 11 in the first group G1 to the first sensor connection unit 21a of the first microphone repeater 21.

[0024] Similarly, one of the first microphone units 11 in the second group G2 is connected via a second cable C21b to the second sensor connection portion 21b of the first microphone repeater 21. The second cable C21b connects one of the first microphone units 11 in the second group G2 that is located at one end of the daisy chain connection to the second sensor connection portion 21b of the first microphone repeater 21.

[0025] 1 and 2, the multiple first microphone units 11 are arranged near one side 100a of the conveyor 100, along the extension direction of the conveyor 100. The first microphone units 11 of the first group G1 and the first microphone units 11 of the second group G2 are arranged along the extension direction of the conveyor 100. The first microphone repeater 21 is located between the first microphone units 11 of the first group G1 and the first microphone units 11 of the second group G2. In other words, the first microphone repeater 21 is arranged in the center position of the multiple first microphone units 11 arranged along the extension direction of the conveyor 100.

[0026] The second microphone unit 12 and the second microphone repeater 22 have the same configuration as the first microphone unit 11 and the first microphone repeater 21, respectively. Furthermore, the connection between the multiple second microphone units 12 and the second microphone repeater 22 is the same as the connection between the multiple first microphone units 11 and the first microphone repeater 21. In other words, the condition diagnosis device 1 includes a second microphone cable C12 and a second microphone repeater cable C22 as the cable C. The multiple second microphone units 12 are connected to each other in a daisy chain manner by the second microphone cable C12. The second microphone repeater 22 is connected to at least one of the multiple second microphone units 12 by the second microphone repeater cable C22.

[0027] The third microphone unit 13 and the third microphone repeater 23 have the same configuration as the first microphone unit 11 and the first microphone repeater 21, respectively. Furthermore, the connection between the multiple third microphone units 13 and the third microphone repeater 23 is the same as the connection between the multiple first microphone units 11 and the first microphone repeater 21. That is, the condition diagnosis device 1 includes a third microphone cable (second sensor cable) C13 and a third microphone repeater cable (second intermediate cable) C23 as the cable C. The multiple third microphone units 13 are connected to each other in a daisy chain manner by the third microphone cable C13. The third microphone repeater 23 is connected to at least one of the multiple third microphone units 13 by the third microphone repeater cable C23.

[0028] The fourth microphone unit 14 and the fourth microphone repeater 24 have the same configuration as the first microphone unit 11 and the first microphone repeater 21, respectively. Furthermore, the manner of connection between the multiple fourth microphone units 14 and the fourth microphone repeater 24 is the same as the manner of connection between the multiple first microphone units 11 and the first microphone repeater 21. In other words, the condition diagnosis device 1 is provided with a fourth microphone cable C14 and a fourth microphone repeater cable C24 as the cable C. The multiple fourth microphone units 14 are connected to each other in a daisy chain manner by the fourth microphone cable C14. The fourth microphone repeater 24 is connected to at least one of the multiple fourth microphone units 14 by the fourth microphone repeater cable C24.

[0029] Next, the manner of connection between the first Ethernet hub 31 and the first microphone repeater 21 to the fourth microphone repeater 24 will be described. The condition diagnostic device 1 is equipped with a first repeater-hub cable (first relay cable) C31, a second repeater-hub cable C32, a third repeater-hub cable (second relay cable) C33, and a fourth repeater-hub cable C34 as cables C. The first repeater-hub cable C31 to the fourth repeater-hub cable C34 may be, for example, twisted pair cables.

[0030] First microphone repeater 21 to fourth microphone repeater 24 each have one connection (one channel) for communicating with first Ethernet hub 31. First Ethernet hub 31 has four connection (four channels) for communicating with first microphone repeater 21 to fourth microphone repeater 24. First Ethernet hub 31 communicates with first microphone repeater 21 to fourth microphone repeater 24 according to, for example, the Ethernet standard.

[0031] The first Ethernet hub 31 is connected to the first microphone repeater 21 by a first repeater-hub cable C31. The first Ethernet hub 31 is also connected to the second microphone repeater 22, the third microphone repeater 23, and the fourth microphone repeater 24 by a second repeater-hub cable C32, a third repeater-hub cable C33, and a fourth repeater-hub cable C34, respectively. The first microphone repeater 21 to the fourth microphone repeater 24 are connected to the first Ethernet hub 31 in a star-type configuration by the first repeater-hub cable C31 to the fourth repeater-hub cable C34.

[0032] The first repeater·hub cable C31 and the second repeater·hub cable C32 are installed, for example, above or below the conveyor 100 and cross the conveyor 100.

[0033] Next, the configuration around the second Ethernet hub 32 will be described. Connected to the second Ethernet hub 32 are a microphone unit 10 and a microphone repeater 20 having the same configuration as the microphone unit 10 and the microphone repeater 20 connected to the first Ethernet hub 31. The connection mode of the microphone unit 10 and the microphone repeater 20 connected to the second Ethernet hub 32 is the same as the connection mode of the microphone unit 10 and the microphone repeater 20 connected to the first Ethernet hub 31. In Fig. 1, the same reference numerals as the components connected to the first Ethernet hub 31 are used for the components around the second Ethernet hub 32, and a detailed description of the configuration around the second Ethernet hub 32 will be omitted.

[0034] That is, the first microphone repeater (third repeater) 21 is connected to the second Ethernet hub 32 via a first repeater-hub cable (third repeater cable) C31, the second microphone repeater 22 is connected via a second repeater-hub cable C32, the third microphone repeater (fourth repeater) 23 is connected via a third repeater-hub cable (fourth repeater cable) C33, and the fourth microphone repeater 24 is connected via a fourth repeater-hub cable C34.

[0035] Furthermore, the multiple first microphone units (third sensor units) 11 connected to the second Ethernet hub 32 via the first microphone repeaters 21 are connected to one another in a daisy chain manner by first microphone cables (third sensor cables) C11. The first microphone repeater 21 connected to the second Ethernet hub 32 is connected to at least one of the multiple first microphone units 11 by a first microphone repeater cable (third intermediate cable) C21. Similarly, the multiple third microphone units (fourth sensor units) 13 connected to the second Ethernet hub 32 via the third microphone repeater 23 are connected to one another in a daisy chain manner by a third microphone cable (fourth sensor cable) C13. The third microphone repeater 23 connected to the second Ethernet hub 32 is connected to at least one of the multiple third microphone units 13 by a third microphone repeater cable (fourth intermediate cable) C23.

[0036] The second microphone unit 12 and second microphone repeater 22, as well as the fourth microphone unit 14 and fourth microphone repeater 24 connected to the second Ethernet hub 32, also have the same configuration as on the first Ethernet hub 31 side.

[0037] Other Ethernet hubs 30 other than the first Ethernet hub 31 and second Ethernet hub 32 described as representatives also have microphone units 10 and microphone repeaters 20 connected to them, similar to the microphone unit 10 and microphone repeater 20 connected to the first Ethernet hub 31.

[0038] Next, the status diagnosis unit 40 will be described. The status diagnosis unit 40 is connected to a plurality of Ethernet hubs 30, including a first Ethernet hub 31 and a second Ethernet hub 32, by a communication cable C40. The plurality of Ethernet hubs 30, including the first Ethernet hub 31 and the second Ethernet hub 32, are connected to the status diagnosis unit 40 in a cascade connection manner by the communication cable C40. The communication cable C40 may be, for example, an optical fiber cable.

[0039] The condition diagnosis unit 40 is configured as an electronic control unit including, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory).

[0040] Status diagnosis unit 40 can acquire detection information of first microphone unit 11, second microphone unit 12, third microphone unit 13, and fourth microphone unit 14 connected to each Ethernet hub 30 from each of Ethernet hubs 30 including first Ethernet hub 31 and second Ethernet hub 32. For example, status diagnosis unit 40 accesses first microphone repeater 21 to fourth microphone repeater 24 and receives detection information of first microphone unit 11 to fourth microphone unit 14.

[0041] The condition diagnosis unit 40 diagnoses the condition of the conveyor 100 based on at least one of the acquired detection information from the first microphone unit 11, the detection information from the second microphone unit 12, the detection information from the third microphone unit 13, and the detection information from the fourth microphone unit 14. For example, the condition diagnosis unit 40 can diagnose the condition of the conveyor 100 using various well-known methods based on the received detection information (sound information).

[0042] For example, the microphone repeater 20 may switch the microphone unit 10 that communicates with the condition diagnosis unit 40 under control of the condition diagnosis unit 40. This allows the condition diagnosis unit 40 to communicate within the communication bandwidth, for example. The microphone repeater 20 may buffer the detection information of the microphone unit 10 connected thereto. In this case, the condition diagnosis unit 40 may access each microphone repeater 20 and receive the buffered detection information.

[0043] As described above, in the condition diagnosis device 1, the microphone unit 10, microphone repeater 20, Ethernet hub 30, and condition diagnosis unit 40, which are provided to diagnose the condition of the conveyor 100, are connected in a daisy chain, star, or cascade configuration. In this manner, the condition diagnosis device 1 connects the devices using various connection configurations, enabling it to transmit information detected by the microphone unit 10 to the condition diagnosis unit 40 using fewer wires and without degradation due to compression, even for a conveyor 100 that extends over, for example, several hundred meters. This allows the condition diagnosis device 1 to appropriately transmit information detected by the multiple microphone units 10 to the condition diagnosis unit 40, such as by suppressing degradation of the information detected by the microphone unit 10. Therefore, the condition diagnosis device 1 efficiently communicates between the condition diagnosis unit 40, which performs the diagnostic process, and the multiple microphone units 10, enabling it to more appropriately diagnose the condition of the conveyor 100.

[0044] In the above-described condition diagnosis device 1, for example, in the first microphone repeater 21, among the multiple first microphone units 11, the first microphone units 11 of the first group G1 are connected to the first sensor connection portion 21a, and the first microphone units 11 of the second group G2 are connected to the second sensor connection portion 21b. In this case, even when multiple first microphone units 11 are provided, the condition diagnosis device 1 can connect these first microphone units 11 to the first microphone repeater 21 while preventing the length of the first microphone repeater cable C21 (first cable C21a, second cable C21b) from increasing. This allows the condition diagnosis device 1 to more appropriately transmit the detection information of the first microphone unit 11 to the condition diagnosis unit 40, for example, by suppressing deterioration of the detection information of the first microphone unit 11 due to transmission. Similarly, the condition diagnosis device 1 can more appropriately transmit the detection information of the second microphone unit 12 to the fourth microphone unit 14 to the condition diagnosis unit 40.

[0045] For example, the first microphone unit 11 and the first microphone repeater 21 are arranged on one side 100a of the conveyor 100. The first Ethernet hub 31 to which the first microphone repeater 21 is connected is arranged on the other side 100b of the conveyor 100. The first microphone repeater 21 and the first Ethernet hub 31 are connected to each other via a first repeater-hub cable C31. In this case, even if the microphone units 10 are arranged on both sides of the conveyor 100, the condition diagnosis device 1 can transmit detection information of multiple first microphone units 11 to the other side 100b of the conveyor 100 where the first Ethernet hub 31 is installed, simply by installing the first repeater-hub cable C31 so that it passes above or below the conveyor 100. In this way, the condition diagnosis device 1 can reduce the number of cables crossing the conveyor 100.

[0046] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, the multiple first microphone units 11 connected to the first microphone repeater 21 may be connected to each other in a bus-type connection. Similarly, the multiple second microphone units 12, the multiple third microphone units 13, and the multiple fourth microphone units 14 may also be connected to each other in a bus-type connection.

[0047] The condition diagnosis device 1 may use various sensor units (first to fourth sensor units) capable of detecting the condition of the conveyor 100, such as a vibrometer, a thermometer, or a camera, instead of the microphone unit 10. Then, the condition diagnosis unit 40 of the condition diagnosis device 1 may diagnose the condition of the conveyor 100 based on the detection information received from these sensor units.

[0048] Furthermore, various communication formats (communication standards) can be adopted for communication between the above-mentioned devices. For example, the power supplies for the microphone unit 10, microphone repeater 20, etc. may be superimposed on the cable C connected thereto. In this case, the condition diagnostic device 1 can omit wiring dedicated to the power supply. [Explanation of symbols]

[0049] 1. Condition diagnostic device 11 First microphone unit (first sensor unit, third sensor unit) 13 Third microphone unit (second sensor unit, fourth sensor unit) 21 1st microphone repeater (1st repeater, 3rd repeater) 21a First sensor connection 21b Second sensor connection part 23 3rd microphone repeater (2nd repeater, 4th repeater) 31 First Ethernet Hub (First Communication Hub) 32 Second Ethernet Hub (Second Communication Hub) 40 Condition diagnosis unit (diagnosis unit) C11 1st microphone cable (1st sensor cable, 3rd sensor cable) C13 3rd microphone cable (2nd sensor cable, 4th sensor cable) C21 1st microphone repeater cable (1st intermediate cable, 3rd intermediate cable) C21a 1st Cable C21b 2nd cable C23 3rd microphone repeater cable (2nd intermediate cable, 4th intermediate cable) C31 1st relay / hub cable (1st relay cable, 3rd relay cable) C33 3rd relay / hub cable (2nd relay cable, 4th relay cable) C40 communication cable 100 Conveyor (object to be diagnosed)

Claims

1. A condition diagnosis device that diagnoses a condition of a diagnosis object extending along a predetermined direction, a plurality of first sensor units connected to each other by a first sensor cable and configured to detect a state of the diagnosis object; a plurality of second sensor units connected to each other by second sensor cables and configured to detect a state of the diagnosis object; a plurality of third sensor units connected to each other by a third sensor cable and configured to detect a state of the object to be diagnosed; a plurality of fourth sensor units connected to each other by a fourth sensor cable and configured to detect a state of the diagnosis object; a first relay connected to at least one of the plurality of first sensor units by a first intermediate cable; a second relay connected to at least one of the plurality of second sensor units by a second intermediate cable; a third relay connected to at least one of the plurality of third sensor units by a third intermediate cable; a fourth relay connected to at least one of the plurality of fourth sensor units by a fourth intermediate cable; a first communication hub connected to the first relay by a first relay cable and connected to the second relay by a second relay cable; a second communication hub connected to the third relay by a third relay cable and connected to the fourth relay by a fourth relay cable; a diagnostic unit connected to the first communication hub and the second communication hub by a communication cable, and configured to diagnose the state of the object to be diagnosed based on at least one of the detection information of the first sensor unit, the detection information of the second sensor unit, the detection information of the third sensor unit, and the detection information of the fourth sensor unit; Equipped with the plurality of first sensor units are connected to one another by the first sensor cables in a daisy chain or bus type connection manner; the second sensor units are connected to one another by the second sensor cables in a daisy chain or bus type connection manner, the third sensor units are connected to one another by the third sensor cables in a daisy chain or bus type connection manner, the plurality of fourth sensor units are connected to one another by the fourth sensor cable in a daisy chain connection or bus connection manner, the first relay device and the second relay device are connected to the first communication hub in a star-type connection manner by the first relay cable and the second relay cable, respectively; the third relay device and the fourth relay device are connected to the second communication hub in a star-type connection manner by the third relay cable and the fourth relay cable, respectively; The first communication hub and the second communication hub are connected to the diagnostic unit in a cascade connection manner by the communication cable.

2. the first relay has a first sensor connection portion and a second sensor connection portion as connection portions with the first sensor portion, the first intermediate cable includes a first cable and a second cable, Among the plurality of first sensor units, a first group of first sensor units including one or more first sensor units is connected to the first sensor connection unit via the first cable, 2. The condition diagnosis device according to claim 1, wherein, among the plurality of first sensor units, a second group of first sensor units including one or more first sensor units different from the first sensor units of the first group is connected to the second sensor connection unit via the second cable.

3. the diagnosis object is a conveyor extending along a conveying direction of an object to be conveyed, the plurality of first sensor units and the first relays are arranged on one side of the conveyor, The condition diagnosis device according to claim 1 or 2, wherein the second sensor units, the second relays, and the first communication hub are arranged on the other side of the conveyor.

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