Linear tandem type on-line monitoring system and troubleshooting method thereof

Abstract

The invention provides a linear tandem type on-line monitoring system and a troubleshooting method thereof, and the method comprises the steps: feeding back a self-checking state return instruction to superior equipment when ith sensor equipment receives a global self-checking instruction transmitted by superior equipment, and forwarding the global self-checking instruction to subordinate equipment at the same time, when a self-inspection state return instruction of the lower-level equipment is received, a self-inspection feedback success state instruction is returned to the lower-level equipment; and when the ith sensor equipment does not receive any one of the global self-checking instruction, the self-checking state return instruction and the self-checking feedback success state instruction in the global self-checking time period, the ith sensor equipment is preliminarily determined as suspected fault equipment. By issuing the global self-checking instruction in the global self-checking time period, the suspected fault equipment in the online monitoring system is preliminarily identified, so that a worker can conveniently carry out troubleshooting.

Description

Technical Field

[0001] This invention relates to the field of monitoring, and more specifically, to a linear series online monitoring system and its fault diagnosis method. Background Technology

[0002] Belt conveyors, as an important transportation device, are widely used in various fields. The normal operation of these conveyor belts has a significant impact on the systems they belong to, thus requiring a distributed online monitoring system to monitor their operational status. Distributed online monitoring systems typically employ one or more sensor chains, each composed of multiple sensors. A failure in one sensor often affects the entire sensor chain, thereby impacting the monitoring effectiveness of the distributed online monitoring system.

[0003] In this situation, troubleshooting faults in the online monitoring system becomes a problem that needs to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a linear series online monitoring system and its fault diagnosis method to improve the above-mentioned problems.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present invention are as follows: In a first aspect, embodiments of the present invention provide a linear series online monitoring system, the online monitoring system including a communication front-end unit and a sensor chain, the sensor chain including N sensor devices, N≥2, and the sensor devices including a communication module; The downlink output terminal of the communication front-end is connected to the downlink input terminal of the first sensor device in the sensor chain, the uplink input terminal of the communication front-end is connected to the uplink output terminal of the first sensor device in the sensor chain, the downlink output terminal of the kth sensor device in the sensor chain is connected to the downlink input terminal of the (k+1)th sensor device, and the uplink input terminal of the kth sensor device is connected to the uplink output terminal of the (k+1)th sensor device, where 1≤k≤N-1; The communication front-end is used to issue a global self-test command during the global self-test period, wherein the global self-test command includes the source address of the command issuance; The i-th sensor device is used to send a self-test status feedback instruction to the upper-level device when it receives the global self-test instruction transmitted by the upper-level device, and forward the global self-test instruction to the lower-level device at the same time. When it receives the self-test status feedback instruction from the lower-level device, it sends a self-test feedback success status instruction back to the lower-level device. The i-th sensor device is used to initially identify a suspected faulty device if it does not receive any of the global self-test command, self-test status feedback command, or self-test feedback success status command during the global self-test period.

[0006] Secondly, embodiments of the present invention provide a fault diagnosis method for a linear series online monitoring system, applied to the sensor device in the aforementioned linear series online monitoring system, the method comprising: When it receives a global self-test command transmitted from the superior device, it sends a self-test status feedback command to the superior device and forwards the global self-test command to the subordinate device. When it receives a self-test status feedback command from the subordinate device, it sends a self-test feedback success status command to the subordinate device. If no global self-test command, self-test status feedback command, or self-test success status command is received during the global self-test period, the device is preliminarily identified as a suspected faulty device.

[0007] Compared to existing technologies, the linear series online monitoring system and its fault diagnosis method provided in this invention involve the i-th sensor device sending a self-test status feedback instruction to the upper-level device upon receiving a global self-test instruction from the upper-level device, and simultaneously forwarding the global self-test instruction to the lower-level device. Upon receiving a self-test status feedback instruction from the lower-level device, the i-th sensor device sends a self-test feedback success status instruction back to the lower-level device. If the i-th sensor device does not receive any of the global self-test instruction, self-test status feedback instruction, or self-test feedback success status instruction during the global self-test period, it is preliminarily identified as a suspected faulty device. By issuing a global self-test instruction during the global self-test period, suspected faulty devices in the online monitoring system are preliminarily identified, thus facilitating fault diagnosis by staff.

[0008] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the link of a linear series online monitoring system provided in an embodiment of the present invention.

[0011] Figure 2 This is a schematic diagram of instruction transmission for the global self-test time period provided in an embodiment of the present invention.

[0012] Figure 3 This is a schematic diagram of instruction transmission for the local self-test time period of a fault sensor provided in an embodiment of the present invention.

[0013] Figure 4 This is a schematic diagram of the sensor device provided in an embodiment of the present invention. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0016] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0017] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0018] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0019] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the link of a linear series online monitoring system provided in an embodiment of the present invention. The online monitoring system includes a communication front-end unit and a sensor chain. The sensor chain includes N sensor devices, where N≥2, and each sensor device includes a communication module.

[0022] The downlink output (R_TX) of the communication front-end is connected to the downlink input (L_RX) of the first sensor device in the sensor chain, the uplink input (R_RX) of the communication front-end is connected to the uplink output (L_TX) of the first sensor device in the sensor chain, the downlink output (R_TX) of the kth sensor device in the sensor chain is connected to the downlink input (L_RX) of the (k+1)th sensor device, and the uplink input (R_RX) of the kth sensor device is connected to the uplink output (L_TX) of the (k+1)th sensor device, where 1≤k≤N-1.

[0023] The communication front-end processor is used to issue a global self-test command (AT1) during the global self-test period. The global self-test command includes the source address of the command (i.e., the address of the communication front-end processor). In an optional implementation, the global self-test command also includes a global command identifier, a current source number (the current source number in the global self-test command sent by the communication front-end processor to the first sensor device is the number of the communication front-end processor), and the status information, data length, and CRC check information of each sensor device in the previous cycle.

[0024] Please refer to Figure 2 , Figure 2This is a schematic diagram of instruction transmission during the global self-test time period provided in an embodiment of the present invention. The i-th sensor device is used to send a self-test status feedback instruction (AT2) to the upper-level device when it receives the global self-test instruction (AT1) transmitted by the upper-level device, and forward the global self-test instruction (AT1) to the lower-level device at the same time. When it receives the self-test status feedback instruction (AT2) from the lower-level device, it sends a self-test feedback success status instruction (AT3) to the lower-level device.

[0025] The upstream device of a sensor device is the sensor device or communication front-end connected to its uplink output and downlink input. The downstream device of a sensor device is the sensor device connected to its downlink output and uplink input. Alternatively, the upstream device of a sensor device is the first device on its uplink and downlink input sides where both uplink and downlink communication forwarding functions are normal, which can be a sensor device or a communication front-end. The downstream device of a sensor device is the first sensor device on its downlink and uplink input sides where both uplink and downlink communication forwarding functions are normal. Taking the i-th sensor device as an example, when the (i+1)-th sensor device is crossed (i.e., the recovery path is open), the downstream device of the i-th sensor device can be the (i+2)-th sensor device. Similarly, the upstream device of the i-th sensor device can also be the (i-2)-th sensor device.

[0026] The i-th sensor device is initially identified as a suspected faulty device if it does not receive any of the following during the global self-test period: global self-test command (AT1), self-test status feedback command (AT2), or self-test feedback success status command (AT3).

[0027] Optionally, when a device is initially identified as potentially faulty, a fault warning can be issued to facilitate troubleshooting by staff.

[0028] Possible reasons for not receiving the global self-test command (AT1): suspected fault at the downlink output of the upstream device and suspected fault at the downlink input of this device. However, at this time, it cannot be ruled out that there is a fault at the downlink output, uplink input and uplink output of this device, nor can it be checked whether there is a fault at the uplink input of the upstream device.

[0029] Possible reasons for receiving a global self-test command (AT1) but not receiving a self-test feedback success status command (AT3) from the upper-level device: suspected fault at the uplink output of this device and suspected fault at the uplink input of the upper-level device.

[0030] Possible reasons for receiving a global self-test command (AT1) but not receiving a self-test status feedback command (AT2) from a lower-level device: suspected fault at the downlink output of this device, suspected fault at the downlink input of the lower-level device, suspected fault at the uplink input of this device, or suspected fault at the uplink output of the lower-level device.

[0031] In the linear series online monitoring system provided in this embodiment of the invention, by issuing a global self-test command (AT1) during the global self-test period, suspected faulty equipment in the online monitoring system is initially identified, thereby facilitating staff to troubleshoot the fault.

[0032] Based on the preceding text, regarding the specific implementation method of the i-th sensor device sending a self-test status feedback instruction (AT2) to the upper-level device when receiving the global self-test instruction (AT1) transmitted by the upper-level device, and forwarding the global self-test instruction (AT1) to the lower-level device, and sending a self-test feedback success status instruction (AT3) to the lower-level device when receiving the self-test status feedback instruction (AT2) from the lower-level device, the present invention embodiment also provides an optional implementation method, please refer to the following text.

[0033] The global self-test command also includes the source number of this transmission.

[0034] When the i-th sensor device receives the global self-test command (AT1) transmitted from the upper-level device, it sends a self-test status feedback command (AT2) to the upper-level device. At the same time, it updates its own number to the current sending source number in the global self-test command (AT1) and transmits the updated global self-test command to the lower-level device.

[0035] When the sensor device's communication function is normal, the current transmission source number in the global self-test command (AT1) will be updated synchronously when forwarding it downward. When the sensor device's uplink communication function is abnormal, the corresponding uplink recovery path is open, and the downlink communication function is active, the corresponding downlink recovery path is closed. The global self-test command (AT1) can be forwarded downward, but the current transmission source number in it will not be changed. If the downlink recovery path is open, the global self-test command (AT1) will skip the sensor device and be transmitted to the next device, and the information in it will not be changed.

[0036] The self-test status feedback instruction (AT2) includes a global instruction identifier, the instruction source address (the address of the sensor device that first generates the self-test status feedback instruction), and a trigger number. It may also include the current transmission source number, data length, and CRC check information. The trigger number is the current transmission source number in the global self-test instruction (AT1) it receives.

[0037] The i-th sensor device is also used to transmit a self-test feedback success status instruction (AT3) to the lower-level device when its own number is the same as the trigger number in the self-test status feedback instruction (AT2) transmitted by the lower-level device. The self-test feedback success status instruction (AT3) includes information such as global instruction identifier, source number information of this transmission, length, and CRC check.

[0038] In one alternative implementation, the i-th sensor device is also used to forward the self-test status feedback command (AT2) it receives to the higher-level device.

[0039] The self-test status feedback command (AT2) is forwarded upwards level by level to the communication front-end, so that the communication front-end determines the status of each sensor device according to the source address of the instruction in the self-test status feedback command (AT2). Taking the i-th sensor device as an example, when the communication front-end receives the self-test status feedback command (AT2) with the source address of the i-th sensor device, it means that the downlink input and uplink output of the i-th sensor device, as well as the downlink output and uplink input of its corresponding upper-level device (e.g., the (i-1)-th sensor device), are all functioning normally. If the self-test status feedback command (AT2) with the source address of the i-th sensor device is not received, then at least one of the above ports is malfunctioning.

[0040] When the communication front-end receives a self-test status feedback instruction (AT2) with the source address of the i-th sensor device, but does not receive a self-test status feedback instruction (AT2) with the source address of the (i-1)-th sensor device, it can be known that the (i-1)-th sensor device has been crossed on the communication link and may be in a fault state.

[0041] Building upon the preceding text, this invention also provides an optional implementation method for further performing fault self-checks, as detailed below.

[0042] If the i-th sensor device does not receive a self-test status feedback command (AT2) from a lower-level device (e.g., the (i+1)-th sensor device), the i-th sensor device will not transmit a self-test feedback success status command (AT3) to the lower-level device. The lower-level device of the i-th sensor device will therefore be unable to obtain the self-test feedback success status command (AT3). The same situation will occur if the lower-level device of the i-th sensor device does not receive AT1. The i-th sensor device and its corresponding lower-level device are the suspected faulty devices identified earlier. Please refer to [link / reference]. Figure 3 , Figure 3This is a schematic diagram illustrating the instruction transmission during the local self-test period of a fault sensor according to an embodiment of the present invention. The i-th sensor device and its corresponding lower-level device will perform a local self-test during the local self-test period of the fault sensor, including: The i-th sensor device is used to send the first partial fault self-test command (AT6) to the lower-level device.

[0043] When the i-th sensor device receives the first partial fault self-test command (AT6), the subordinate device is used to send a first partial fault self-test feedback command (AT7) to the i-th sensor device.

[0044] The subordinate device of the i-th sensor device is used to send the second local fault self-test command (AT4) to the i-th sensor device.

[0045] The i-th sensor device is used to send a second local fault self-test feedback command (AT5) to the lower-level device when it receives the second local fault self-test command (AT4).

[0046] The i-th sensor device and its corresponding subordinate devices determine the fault port based on the instructions received during the local self-test period of the faulty sensor.

[0047] In one optional implementation, after identifying the faulty port, if the uplink output terminal is functioning normally, the fault information can be uploaded, and the identified faulty port can be sent to the communication front-end unit for record-keeping.

[0048] For example, if the i-th sensor device does not receive the feedback instruction AT2 from the (i+1)-th sensor device during the global self-test phase, the (i+1)-th sensor device may not have received the global self-test instruction AT1 from the sensor, or it may have received the global self-test instruction AT1 and sent the AT2 instruction, but did not receive the self-test feedback success status instruction AT3.

[0049] If the (i+1)th sensor device does not receive the global self-test command AT1, it will not forward the AT1 command. All sensors following the (i+1)th sensor device will also not receive the AT1 command and will enter the same troubleshooting process as the (i+1)th sensor device. At this time, because the i-th sensor device is in its self-test phase and has not received the AT2 command, its right-hand transceiver unit sends the local fault self-test command AT6 via R_TX during the local self-test period of the faulty sensor. The left-hand transceiver unit of the (i+1)th sensor device and the sensors following it sends the local fault self-test command AT4 via L_TX, and the right-hand transceiver unit sends the local fault self-test command AT6 via R_TX. The AT4 command is the global feedback command for sensor chain fault troubleshooting, and its content includes the AT4 command identifier, the source number information for this transmission, the fault troubleshooting received command information for each sensor, length, CRC checksum, and other information. The fault diagnosis and troubleshooting instruction information received by each AT4 sensor is updated when the subsequent instruction arrives at the sensor. This includes the fault diagnosis and troubleshooting information of the sensor itself and the fault diagnosis and troubleshooting information of adjacent sensors. For example, when the instruction arrives, the left and right communication units of the i-th sensor device, which were identified during the fault diagnosis process of the i-th sensor device, are updated to the information field of the corresponding i-th sensor device.

[0050] Optionally, if the i-th sensor device receives the second partial fault self-test instruction (AT4) transmitted by the lower-level device but does not receive the first partial fault self-test feedback instruction (AT7), it determines that the downlink output terminal of the i-th sensor device is suspected to be faulty. Of course, this situation may also be that the downlink input terminal of the lower-level device of the i-th sensor device is suspected to be faulty, but from the perspective of the i-th sensor device, it only needs to focus on its own port.

[0051] Optionally, when the i-th sensor device receives the second local fault self-test command (AT4) and the first local fault self-test feedback command (AT7) transmitted by the lower-level device, it determines that both the downlink output and uplink input of the i-th sensor device are normal. This indicates that sensor i+1 may have experienced abnormalities such as restart during the global self-test period, but has now recovered.

[0052] Optionally, if the i-th sensor device does not receive the second partial fault self-test instruction (AT4) transmitted by the lower-level device and does not receive the first partial fault self-test feedback instruction (AT7), it determines that the downlink output terminal and uplink input terminal of the i-th sensor device are suspected to be faulty.

[0053] Optionally, if the downstream device of the i-th sensor device receives the first partial fault self-test instruction (AT6) of the i-th sensor device but does not receive the second partial fault self-test feedback instruction (AT5), it determines that the upstream output terminal of the downstream device is suspected to be faulty. Of course, this situation may also be that the upstream input terminal of the i-th sensor device is suspected to be faulty.

[0054] Optionally, when the downstream device of the i-th sensor device receives the first partial fault self-test command (AT6) and the second partial fault self-test feedback command (AT5) of the i-th sensor device, it determines that both the downlink input and uplink output of the downstream device are normal. This indicates that the i-th sensor device may have experienced an anomaly such as a restart during the global self-test period, and has now recovered.

[0055] Optionally, if the downstream device of the i-th sensor device does not receive the first partial fault self-test instruction (AT6) and the second partial fault self-test feedback instruction (AT5) from the i-th sensor device, it determines that the downstream device's downlink input and uplink output are suspected to be faulty.

[0056] Building upon the foregoing, this embodiment of the invention also provides an optional implementation method for the structure of the sensor device. Please refer to [link / reference]. Figure 4 , Figure 4 This is a schematic diagram of the sensor device provided in an embodiment of the present invention.

[0057] The sensor device also includes an uplink recovery path (CL1) and a downlink recovery path (CL2).

[0058] The two ends of the uplink recovery path are connected to the uplink input and uplink output of this sensor device, respectively, and the two ends of the downlink recovery path are connected to the downlink input and downlink output of this sensor device, respectively.

[0059] During the idle period following the partial self-test period of the fault sensor, the i-th sensor device controls the downlink recovery path to be activated if a fault is suspected at its downlink input or downlink output; and controls the uplink recovery path to be activated if a fault is suspected at its uplink input or uplink output.

[0060] Optionally, in the next cycle, the first type of sensor device is used to control the disconnection of the downlink recovery path upon receiving a global self-test command (AT1) (because the faulty sensor has been repaired and may receive AT1).

[0061] Optionally, the second type of sensor device is used to control the disconnection of the uplink recovery path upon receiving a self-test status feedback command (AT2) (because the faulty sensor has been repaired and may receive AT2).

[0062] The first type of sensor device is a sensor device that controls the downlink recovery path to be activated due to a suspected fault at the downlink input terminal, and the second type of sensor device is a sensor device that controls the uplink recovery path to be activated due to a suspected fault at the uplink input terminal.

[0063] Please continue to refer to this. Figure 4 The communication module includes a left-hand transceiver unit, a right-hand transceiver unit, and a main control unit.

[0064] The downlink input terminal of the left transceiver unit serves as the downlink input terminal of the sensor device. The downlink output terminal of the left transceiver unit is connected to the downlink input terminal of the main control unit. The downlink output terminal of the main control unit is connected to the downlink input terminal of the right transceiver unit. The downlink output terminal of the right transceiver unit serves as the downlink output terminal of the sensor device.

[0065] The uplink input terminal of the right transceiver unit serves as the uplink input terminal of the sensor device. The uplink output terminal of the right transceiver unit is connected to the uplink input terminal of the main control unit. The uplink output terminal of the main control unit is connected to the uplink input terminal of the left transceiver unit. The uplink output terminal of the left transceiver unit serves as the uplink output terminal of the sensor device.

[0066] Optionally, the communication cycle of the online monitoring system includes a global self-test time period, a first idle time period, a host parameter distribution and clock calibration time period, a data acquisition time period, a sensor data upload time period, a redundant data transmission time period, a second idle time period, a faulty sensor local self-test time period, and a third idle time period.

[0067] The reserved redundant data transmission time period is used to temporarily disconnect from sensors in the sensor chain, but which can still collect data normally, and then reconnect to upload the historical data that the sensors did not upload in time.

[0068] This invention also provides a fault diagnosis method for a linear series online monitoring system, applied to the sensor device in the aforementioned linear series online monitoring system. The fault diagnosis method for the linear series online monitoring system includes: S101: When receiving the global self-test command transmitted by the superior device, the superior device sends a self-test status feedback command, and forwards the global self-test command to the subordinate device. When receiving the self-test status feedback command from the subordinate device, the superior device sends a self-test feedback success status command back to the subordinate device. S102 If no global self-test command, self-test status feedback command, or self-test feedback success status command is received during the global self-test period, the device is initially identified as a suspected faulty device.

[0069] Optionally, if the sensor device does not receive a self-test status feedback instruction from the lower-level device, a partial self-test can be performed during the local self-test period of the faulty sensor. The fault diagnosis method for the linear series online monitoring system includes: S103, send a first partial fault self-test instruction to the lower-level device, so that when the lower-level device receives the first partial fault self-test instruction, it will send a first partial fault self-test feedback instruction to the sensor device.

[0070] S104, when the sensor device receives the second partial fault self-test command from the lower-level device, it sends the second partial fault self-test feedback command to the lower-level device.

[0071] S105, the sensor device determines the faulty port based on the instructions received during the local self-test period of the faulty sensor.

[0072] Optionally, the troubleshooting method for a linear series online monitoring system also includes: S106, if the sensor device is suspected of having a fault at its downlink input or downlink output, it controls the downlink recovery path to be activated; if the sensor device is suspected of having a fault at its uplink input or uplink output, it controls the uplink recovery path to be activated.

[0073] In summary, the linear series online monitoring system and its fault diagnosis method provided by this invention involve the following steps: When the i-th sensor device receives a global self-test command transmitted from the upper-level device, it sends a self-test status feedback command to the upper-level device and forwards the global self-test command to the lower-level device. Upon receiving a self-test status feedback command from the lower-level device, the i-th sensor device sends a self-test feedback success command back to the lower-level device. If the i-th sensor device does not receive any of the global self-test command, self-test status feedback command, or self-test feedback success command during the global self-test period, it is preliminarily identified as a suspected faulty device. By issuing a global self-test command during the global self-test period, suspected faulty devices in the online monitoring system are preliminarily identified, thus facilitating fault diagnosis by staff.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0075] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A linear series online monitoring system, characterized in that, The online monitoring system includes a communication front-end unit and a sensor chain. The sensor chain includes N sensor devices, where N≥2, and each sensor device includes a communication module. The downlink output terminal of the communication front-end is connected to the downlink input terminal of the first sensor device in the sensor chain, the uplink input terminal of the communication front-end is connected to the uplink output terminal of the first sensor device in the sensor chain, the downlink output terminal of the kth sensor device in the sensor chain is connected to the downlink input terminal of the (k+1)th sensor device, and the uplink input terminal of the kth sensor device is connected to the uplink output terminal of the (k+1)th sensor device, where 1≤k≤N-1; The communication front-end is used to issue a global self-test command during the global self-test period, wherein the global self-test command includes the source address of the command issuance; The i-th sensor device is used to send a self-test status feedback instruction to the upper-level device when it receives the global self-test instruction transmitted by the upper-level device, and forward the global self-test instruction to the lower-level device at the same time. When it receives the self-test status feedback instruction from the lower-level device, it sends a self-test feedback success status instruction back to the lower-level device. The i-th sensor device is used to initially identify a suspected faulty device if it does not receive any of the global self-test command, self-test status feedback command, or self-test feedback success status command during the global self-test period.

2. The linear series online monitoring system as described in claim 1, characterized in that, The global self-test command also includes the source number of this transmission; The i-th sensor device is used to send a self-test status feedback instruction to the upper-level device when it receives the global self-test instruction transmitted by the upper-level device. At the same time, it updates its own number to the current sending source number in the global self-test instruction and transmits the updated global self-test instruction to the lower-level device. The self-test status feedback instruction includes the instruction sending source address and trigger number, wherein the trigger number is the current sending source number in the global self-test instruction it receives; The i-th sensor device is also used to transmit a self-test feedback success status command to the lower-level device when its own number is the same as the trigger number in the self-test status feedback command transmitted by the lower-level device.

3. The linear series online monitoring system as described in claim 2, characterized in that, The i-th sensor device is also used to forward the self-test status feedback instructions it receives to the higher-level device.

4. The linear series online monitoring system as described in claim 1, characterized in that, If the i-th sensor device does not receive a self-test status feedback instruction from the lower-level device, the i-th sensor device and its corresponding lower-level device will perform a partial self-test during the faulty sensor's local self-test time period, including: The i-th sensor device is used to send the first partial fault self-test command to the lower-level device; The subordinate device of the i-th sensor device is used to send a first partial fault self-test feedback instruction to the i-th sensor device when it receives the first partial fault self-test instruction. The subordinate device of the i-th sensor device is used to send the second local fault self-test command to the i-th sensor device; The i-th sensor device is used to feed back the second local fault self-test feedback command to the lower-level device when it receives the second local fault self-test command; The i-th sensor device and its corresponding subordinate devices determine the fault port based on the instructions received during the local self-test period of the faulty sensor.

5. The linear series online monitoring system as described in claim 4, characterized in that, If the i-th sensor device receives a second partial fault self-test command transmitted from the lower-level device but does not receive a first partial fault self-test feedback command, it determines that the downlink output terminal of the i-th sensor device is suspected to be faulty.

6. The linear series online monitoring system as described in claim 4, characterized in that, Upon receiving the second partial fault self-test command and the first partial fault self-test feedback command transmitted from the lower-level device, the i-th sensor device determines that both its downlink output and uplink input are normal.

7. The linear series online monitoring system as described in claim 4, characterized in that, If the i-th sensor device does not receive a second partial fault self-test command transmitted from the lower-level device and does not receive a first partial fault self-test feedback command, it determines that the downlink output terminal and uplink input terminal of the i-th sensor device are suspected to be faulty.

8. The linear series online monitoring system as described in claim 4, characterized in that, If the downstream device of the i-th sensor device receives the first partial fault self-test command from the i-th sensor device but does not receive the second partial fault self-test feedback command, it determines that the upstream output terminal of the downstream device is suspected to be faulty.

9. The linear series online monitoring system as described in claim 4, characterized in that, Upon receiving the first partial fault self-test command and the second partial fault self-test feedback command from the i-th sensor device, the downstream device determines that both the downlink input and uplink output of the downstream device are normal.

10. The linear series online monitoring system as described in claim 4, characterized in that, If the downstream device of the i-th sensor device does not receive the first local fault self-test command and the second local fault self-test feedback command from the i-th sensor device, it determines that the downstream device's downlink input and uplink output are suspected to be faulty.

11. The linear series online monitoring system as described in claim 4, characterized in that, The sensor device also includes an uplink recovery path and a downlink recovery path; The two ends of the uplink recovery path are respectively connected to the uplink input terminal and the uplink output terminal of this sensor device, and the two ends of the downlink recovery path are respectively connected to the downlink input terminal and the downlink output terminal of this sensor device; After the partial self-test period of the fault sensor, the i-th sensor device is used to control the downlink recovery path to be activated if a fault is suspected at its downlink input or downlink output; and to control the uplink recovery path to be activated if a fault is suspected at its uplink input or uplink output.

12. The linear series online monitoring system as described in claim 11, characterized in that, In the next cycle, the first type of sensor device is used to control the disconnection of the downlink recovery path upon receiving a global self-test command; The second type of sensor device is used to control the disconnection of the uplink recovery path when a self-test status feedback command is received. The first type of sensor device is a sensor device that controls the downlink recovery path to be activated due to a suspected fault at the downlink input terminal, and the second type of sensor device is a sensor device that controls the uplink recovery path to be activated due to a suspected fault at the uplink input terminal.

13. The linear series online monitoring system as described in claim 1, characterized in that, The communication module includes a left-hand transceiver unit, a right-hand transceiver unit, and a main control unit; The downlink input terminal of the left-hand transceiver unit serves as the downlink input terminal of the sensor device. The downlink output terminal of the left-hand transceiver unit is connected to the downlink input terminal of the main control unit. The downlink output terminal of the main control unit is connected to the downlink input terminal of the right-hand transceiver unit. The downlink output terminal of the right-hand transceiver unit serves as the downlink output terminal of the sensor device. The uplink input terminal of the right-hand transceiver unit serves as the uplink input terminal of the sensor device. The uplink output terminal of the right-hand transceiver unit is connected to the uplink input terminal of the main control unit. The uplink output terminal of the main control unit is connected to the uplink input terminal of the left-hand transceiver unit. The uplink output terminal of the left-hand transceiver unit serves as the uplink output terminal of the sensor device.

14. The linear series online monitoring system as described in claim 1, characterized in that, The communication cycle of the online monitoring system includes a global self-test time period, a first idle time period, a host parameter distribution and clock calibration time period, a data acquisition time period, a sensor data upload time period, a redundant data transmission time period, a second idle time period, a faulty sensor local self-test time period, and a third idle time period.

15. A fault diagnosis method for a linear series online monitoring system, characterized in that, The sensor device applied to the linear series online monitoring system according to any one of claims 1-14, the method comprising: When it receives a global self-test command transmitted from the superior device, it sends a self-test status feedback command to the superior device and forwards the global self-test command to the subordinate device. When it receives a self-test status feedback command from the subordinate device, it sends a self-test feedback success status command to the subordinate device. If no global self-test command, self-test status feedback command, or self-test success status command is received during the global self-test period, the device is preliminarily identified as a suspected faulty device.

16. The fault diagnosis method for the linear series online monitoring system as described in claim 15, characterized in that, When the sensor device does not receive a self-test status feedback instruction from the lower-level device, a partial self-test is performed during the local self-test period of the faulty sensor. The method includes: Send a first partial fault self-test instruction to the lower-level device so that when the lower-level device receives the first partial fault self-test instruction, it can send a first partial fault self-test feedback instruction to the sensor device. When the sensor device receives a second partial fault self-test command from the lower-level device, it sends a second partial fault self-test feedback command to the lower-level device. The sensor device determines the faulty port based on the instructions received during the local self-test period of the faulty sensor.

17. The fault diagnosis method for a linear series online monitoring system as described in claim 16, characterized in that, The method further includes: If a sensor device is suspected of having a fault at its downlink input or downlink output, it controls the downlink recovery path to be activated; if a sensor device is suspected of having a fault at its uplink input or uplink output, it controls the uplink recovery path to be activated.

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