Bus monitoring system

Abstract

According to an embodiment of the present disclosure, there is provided a bus monitoring system, comprising: a carrier communication line capable of simultaneously transmitting a first communication signal and a second communication signal; the communication host is connected to the carrier communication line and comprises a low-speed host module and a high-speed host module, the low-speed host module is configured to receive a first communication signal transmitted by the carrier communication line in a first frequency band, and the high-speed host module is configured to receive a second communication signal transmitted by the carrier communication line in a second frequency band, the second frequency band is higher than the first frequency band; the first communication slave is connected to the carrier communication line and comprises a first low-speed slave module, and the first low-speed slave module is configured to transmit a first communication signal to the low-speed host module through the carrier communication line in a first frequency band; and the second communication slave is connected to the carrier communication line and comprises a high-speed slave module, and the high-speed slave module is configured to transmit a second communication signal to the high-speed host module through the carrier communication line in a second frequency band.

Description

Technical Field

[0001] Example embodiments of the present disclosure generally relate to the field of busbar operating status monitoring, and more particularly to a busbar monitoring system. Background Art

[0002] Busbars, also known as bus ducts, are used to distribute power to the various components of a distributed system. Busbars are increasingly replacing traditional cables in power transmission projects. Busbars typically consist of multiple sections connected by joints. During busbar operation, the joints are the hottest part of the busbar, so the temperature at these joints must be monitored to maintain a constant understanding of the busbar's operating status. To monitor busbar temperature, temperature sensors can be installed at each joint. The temperatures detected by the temperature sensors can be transmitted via a power carrier communication (HPLC) slave installed on the busbar via a communication cable to an HPLC master for further processing by higher-level systems.

[0003] Due to the numerous joints on the busbar, a large number of temperature measurement points need to be set up on the busbar, and temperature sensors are used to detect the temperature at these temperature measurement points. In order to transmit temperature data, each temperature measurement point needs to be equipped with an HPLC slave module to inject the temperature data into the carrier communication line. However, since the temperature of the busbar does not change particularly frequently, the amount of temperature data that needs to be transmitted by each HPLC slave module is very small, and the temperature data does not require a high communication bandwidth. This will result in low utilization efficiency of the HPLC slave modules. In addition, due to the relatively high cost of HPLC slave modules, the large number of HPLC modules will result in a high cost for the entire monitoring system. Summary of the Invention

[0004] Embodiments of the present disclosure provide a bus monitoring system to at least partially solve the above-mentioned and other potential problems existing in the prior art.

[0005] In one aspect of the present disclosure, a bus monitoring system is provided. The bus monitoring system includes: a carrier communication line, including a first conductor and a second conductor, the first conductor being adapted to be connected to the positive pole of a DC power supply, the second conductor being adapted to be connected to the negative pole of the DC power supply, the carrier communication line being capable of simultaneously transmitting a first communication signal and a second communication signal, the first communication signal indicating a first characteristic of the bus, and the second communication signal indicating a second characteristic of the bus; a communication host connected to the carrier communication line and including a low-speed host module and a high-speed host module, the low-speed host module being configured to receive the first communication signal transmitted by the carrier communication line in a first frequency band, the high-speed host module being configured to receive the first communication signal transmitted by the carrier communication line in a first frequency band, and the high-speed host module being configured to receive the first communication signal transmitted by the carrier communication line in a first frequency band. The host module is configured to receive the second communication signal transmitted by the carrier communication line in a second frequency band, and the second frequency band is higher than the first frequency band; the first communication slave is connected to the carrier communication line and includes a first low-speed slave module, and the first low-speed slave module is configured to transmit the first communication signal to the low-speed host module via the carrier communication line in the first frequency band; and the second communication slave is connected to the carrier communication line and includes a high-speed slave module, and the high-speed slave module is configured to transmit the second communication signal to the high-speed host module via the carrier communication line in the second frequency band.

[0006] According to the embodiments of the present disclosure, two different types of communication slaves can be used to transmit different communication signals on a carrier communication line at different communication frequency bands. For parameter measurement applications with low real-time requirements and small data volumes, a first low-speed slave module in the first communication slave can be used to transmit measurement data to a low-speed master module via a carrier communication line at a lower first frequency band. For parameter measurement applications with higher real-time requirements and high data throughput, a high-speed slave module in the second communication slave can be used to transmit measurement data to a high-speed master module via a carrier communication line at a higher second frequency band. In this way, the cost of the entire bus monitoring system can be reduced while maintaining the communication efficiency of the system.

[0007] It should be understood that the content described in this summary section is not intended to limit the key features or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0009] Figure 1 A schematic structural diagram of a bus monitoring system according to some embodiments of the present disclosure is shown;

[0010] Figure 2 A schematic structural diagram of a bus monitoring system according to some embodiments of the present disclosure is shown;

[0011] Figure 3 Shown Figure 2 The circuit block diagram of the second communication slave in the bus monitoring system shown;

[0012] Figure 4 A schematic structural diagram of a bus monitoring system according to some embodiments of the present disclosure is shown;

[0013] Figure 5 A schematic structural diagram of a bus monitoring system according to some embodiments of the present disclosure is shown;

[0014] Figure 6 Shown Figure 5 An example transmission sequence of the first communication signal and the second communication signal in the bus monitoring system shown; and

[0015] Figure 7 A schematic structural diagram of a bus monitoring system according to some embodiments of the present disclosure is shown.

[0016] Description of reference numerals:

[0017] 10 carrier communication line; 101 first conductor; 102 second conductor;

[0018] 20 communication host; 201 low-speed host module; 202 high-speed host module;

[0019] 31 first communication slave; 311 first low-speed slave module;

[0020] 32 second communication slave; 321 high-speed slave module; 322 second low-speed slave module; 323 measurement data converter; 324 receiving unit; 325 micro control unit; 326 storage unit; 327 isolation power converter; 328 isolation circuit;

[0021] 40 low-pass filter;

[0022] 50 switching devices;

[0023] 60: electric meter; 61: temperature sensor; 62: busbar junction box. DETAILED DESCRIPTION

[0024] The following describes embodiments of the present disclosure in more detail with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0025] In the description of the embodiments of the present disclosure, the term "including" and similar terms should be understood as open inclusion, that is, "including but not limited to". The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The term "some embodiments" should be understood as "at least some embodiments". Other explicit and implicit definitions may be included below. The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may be included below.

[0026] As mentioned above, because busbar temperature changes are infrequent, the amount of temperature data required to be transmitted by each HPLC slave module is minimal, and the communication bandwidth requirements for temperature data are low. This results in inefficient utilization of the HPLC slave modules. Furthermore, due to the relatively high cost of HPLC slave modules, deploying a large number of these modules to transmit temperature data would increase the cost of the entire monitoring system.

[0027] According to the embodiments of the present disclosure, in order to improve the utilization efficiency of the HPLC slave module and reduce the cost of the entire monitoring system, a high-speed slave module such as the HPLC slave module can be used to transmit measurement data with high real-time requirements and large data throughput (such as electricity meter data), and a low-speed slave module with a lower communication frequency band can be used to transmit measurement data with low real-time requirements and small data volume (such as temperature data). Figures 1 to 7 Example embodiments of the present disclosure are described.

[0028] Figure 1 FIG. 1 shows a schematic diagram of the structure of a bus monitoring system according to some embodiments of the present disclosure. Figure 1As shown, the busbar monitoring system described herein generally includes a carrier communication line 10, a communication host 20, and multiple communication slaves 31 and 32. The communication host 20 and the multiple communication slaves 31 and 32 are respectively connected to the carrier communication line 10. The carrier communication line 10 can be connected to a DC power supply so that the communication host 20 and the multiple communication slaves 31 and 32 are powered by the DC power supply. In addition, the communication host 20 and the multiple communication slaves 31 and 32 can communicate via the carrier communication line 10. The communication slave 31 is used to transmit busbar measurement data with low real-time requirements and small data volume, such as busbar temperature data, while the communication slave 32 is used to transmit busbar measurement data with high real-time requirements and high data throughput, such as busbar electricity meter data. Figure 1 Only four communication slaves 31 and one communication slave 32 are shown to illustrate the principles of the present disclosure. However, it should be understood that the number of communication slaves 31 and 32 can be increased as needed. Furthermore, for ease of description, the communication slave 31 may also be referred to herein as the first communication slave, and the communication slave 32 may also be referred to herein as the second communication slave.

[0029] In some embodiments, as Figure 1 As shown, the carrier communication line 10 includes a first conductor 101 and a second conductor 102. The first conductor 101 is adapted to be connected to the positive terminal DC+ of a DC power supply. As an example, the positive terminal DC+ of the DC power supply can provide a voltage of +24V to the first conductor 101. The second conductor 102 is adapted to be connected to the negative terminal DC- of the DC power supply. As an example, the negative terminal DC- of the DC power supply can provide a voltage of 0V to the second conductor 102. It should be noted that the numbers, values, etc. mentioned here and elsewhere in this disclosure are exemplary and are not intended to limit the scope of this disclosure in any way. Any other appropriate numbers and values ​​are possible.

[0030] In some embodiments, as Figure 1 As shown, the first communication slave 31 can be connected to a temperature sensor 61 for detecting the temperature of the busbar, and the temperature data detected by the temperature sensor 61 can be transmitted as a first communication signal S1 to the communication master 20 via the carrier communication line 10. The temperature sensor 61 can be installed at each joint of the busbar to monitor the temperature changes of the joint. Each temperature sensor 61 is connected to a corresponding first communication slave 31, so that the corresponding temperature data is injected into the carrier communication line 10 via the first communication slave 31.

[0031] In some embodiments, as Figure 1As shown, the second communication slave 32 can be connected to an electric meter 60 and transmit the meter data from the electric meter 60 as a second communication signal S2 via the carrier communication line 10 to the communication master 20. The electric meter 60 can be installed at different locations on the busbar to monitor corresponding changes in electric energy. The number of electric meters 60 is generally relatively small compared to the number of temperature measurement points. For example, if there are 100 temperature measurement points on the busbar, there may only be 10 electric meters 60 installed on the busbar. Each electric meter 60 is connected to a corresponding second communication slave 32, so that the corresponding electric meter data is injected into the carrier communication line 10 via the second communication slave 32.

[0032] In an embodiment of the present disclosure, to simultaneously transmit a first communication signal S1 and a second communication signal S2 via a carrier communication line 10, the first communication slave 31 and the second communication slave 32 utilize different communication frequency bands to inject corresponding measurement data onto the carrier communication line 10. For example, the first communication slave 31 may inject the first communication signal S1 onto the carrier communication line 10 using a first frequency band. The first communication signal S1 indicates a first characteristic of a busbar, such as its temperature. The second communication slave 32 may inject the second communication signal S2 onto the carrier communication line 10 using a second frequency band. The second communication signal S2 indicates a second characteristic of the busbar, such as its electricity meter reading. The second frequency band is higher than the first frequency band, allowing the first communication signal S1 and the second communication signal S2 to be distinguished in frequency. In some embodiments, the first frequency band may be, for example, 2 kHz to 10 kHz, while the second frequency band may be, for example, 2.5 MHz to 5.7 MHz. It should be understood that while the second frequency band is higher than the first frequency band to allow the first communication signal S1 and the second communication signal S2 to be distinguished in frequency, the first and second frequency bands may be any other suitable frequency ranges.

[0033] like Figure 1 As shown, in order to receive a first communication signal S1 and a second communication signal S2 transmitted in different frequency bands from a first communication slave 31 and a second communication slave 32 via a carrier communication line 10, the communication master 20 includes a low-speed master module 201 and a high-speed master module 202. The low-speed master module 201 can receive the first communication signal S1 transmitted by the carrier communication line 10 in a first frequency band. The high-speed master module 202 can receive the second communication signal S2 transmitted by the carrier communication line 10 in a second frequency band. The low-speed master module 201 and the high-speed master module 202 can respectively transmit the first communication signal S1 and the second communication signal S2 to the upper-level system for determining the operating status of the bus.

[0034] like Figure 1As shown, to transmit a first communication signal S1 in a first frequency band, the first communication slave 31 includes a first low-speed slave module 311. The first low-speed slave module 311 can be connected to a measurement device, such as a temperature sensor 61, to transmit the first communication signal S1, such as temperature data, to the low-speed master module 201 via the carrier communication line 10. It should be understood that in addition to temperature data, the first low-speed slave module 311 can also transmit any other suitable type of bus measurement data with lower real-time requirements and smaller data volume, such as torque data, to the low-speed master module 201 via the carrier communication line 10. In this case, the first communication signal S1 can be used to indicate the torque or other characteristics of the bus.

[0035] like Figure 1 As shown, in order to transmit the second communication signal S2 in the second frequency band, the second communication slave 32 includes a high-speed slave module 321. The high-speed slave module 321 can be connected to a measuring device such as an electric meter 60 to transmit the second communication signal S2, such as electric meter data, to the high-speed master module 202 via the carrier communication line 10. It should be understood that in addition to electric meter data, the high-speed slave module 321 can also transmit any other suitable type of bus measurement data with high real-time requirements and high data throughput to the high-speed master module 202 via the carrier communication line 10, and the embodiments of the present disclosure are not limited to this. In this case, the second communication signal S2 can be used to indicate the corresponding characteristics of the bus.

[0036] According to the embodiments of the present disclosure, for parameter measurement applications requiring lower real-time performance and smaller data volumes, the first low-speed slave module 311 in the first communication slave 31 can be used to transmit measurement data to the low-speed master module 201 via the carrier communication line 10 at a lower first frequency band. For parameter measurement applications requiring higher real-time performance and higher data throughput, the high-speed slave module 321 in the second communication slave 32 can be used to transmit measurement data to the high-speed master module 202 via the carrier communication line 10 at a higher second frequency band. In this way, the cost of the entire bus monitoring system can be reduced while maintaining the communication efficiency of the system.

[0037] Figure 2 A schematic structural diagram of a bus monitoring system according to some embodiments of the present disclosure is shown. Figure 2 The architecture of the busbar monitoring system shown is similar to Figure 1 The architecture of the busbar monitoring system shown is similar. Next, the differences between them will be mainly described, and the same parts will not be repeated.

[0038] In some embodiments, as Figure 2As shown, the second communication slave 32 further includes a second low-speed slave module 322. The second low-speed slave module 322 can transmit a first communication signal S1 to the low-speed master module 201 via the carrier communication line 10 in the first frequency band. The second low-speed slave module 322 can be connected to a temperature sensor 61 for detecting the temperature of the busbar, and transmit the temperature data detected by the temperature sensor 61 as the first communication signal S1 to the low-speed master module 201 via the carrier communication line 10. Similarly, in addition to temperature data, the second low-speed slave module 322 can also transmit any other appropriate type of busbar measurement data with lower real-time requirements and smaller data volume, such as torque data, to the low-speed master module 201 via the carrier communication line 10.

[0039] Figure 3 Shown Figure 2 FIG. 1 is a block diagram of a circuit of a second communication slave 32 in a bus monitoring system. Figure 3 As shown, in addition to the high-speed slave module 321 and the second low-speed slave module 322, the second communication slave 32 also includes a receiving unit 324 and a microcontroller unit 325. The receiving unit 324 can receive measurement data from a measuring device such as an electric meter 60 using the RS-485 protocol, for example. The microcontroller unit 325 is coupled to the receiving unit 324 and the high-speed slave module 321. The receiving unit 324 can transmit the received measurement data to the microcontroller unit 325 via a universal serial data bus (UART). The microcontroller unit 325 can convert the measurement data into a second communication signal S2 and transmit the second communication signal S2 to the high-speed slave module 321 via the universal serial data bus. The second low-speed slave module 322 can also be connected to the microcontroller unit 325 via the universal serial data bus to achieve transmission of measurement data with lower real-time performance and small data volume.

[0040] Since the amount of measurement data with high real-time requirements, such as electric meter data, is large, in some embodiments, a storage unit 326 may be provided in the second communication slave 32 to store the measurement data. Figure 3 The storage unit 326 may be connected to the microcontroller unit 325 via a serial peripheral interface (SPI), for example. The storage unit 326 may be a random access memory (RAM) or any other suitable type of storage device.

[0041] In some embodiments, to achieve power isolation, the second communication slave 32 may further include an isolated power converter 327 adapted to connect to a power source (POW) and perform DC-DC conversion on the power source. In some embodiments, the second communication slave 32 may further include an isolation circuit 328 disposed between the receiving unit 324 and the microcontroller unit 325 to perform isolation operations such as filtering interference data from the measurement data.

[0042] When the carrier communication line 10 is used to simultaneously transmit the first communication signal S1 and the second communication signal S2, it is found that the second communication signal S2 in the high frequency band will cause certain interference to the first communication signal S1 in the low frequency band, affecting the accuracy of the first communication signal S1 to a certain extent. To this end, the embodiments of the present disclosure provide a solution to alleviate the interference of the second communication signal S2 in the high frequency band on the first communication signal S1 in the low frequency band, such as Figure 4 and Figure 5 shown.

[0043] In some embodiments, as Figure 4 As shown, the bus monitoring system also includes multiple low-pass filters 40. The low-pass filters 40 are disposed between each of the low-speed master module 201, the first low-speed slave module 311, and the second low-speed slave module 322 and the carrier communication line 10. The low-pass filters 40 have a predetermined cutoff frequency. For example, when the first frequency band is 2kHz to 10kHz and the second frequency band is 2.5MHz to 5.7MHz, the low-pass filters 40 may have a cutoff frequency of 150kHz. This cutoff frequency is relatively far from the second frequency band, thereby mitigating interference from the high-frequency second communication signal S2 on the low-frequency first communication signal S1. It should be understood that in some embodiments, a low-pass filter 40 may be disposed between one or more of the low-speed master module 201, the first low-speed slave module 311, and the second low-speed slave module 322 and the carrier communication line 10. This can also, to a certain extent, mitigate interference from the high-frequency second communication signal S2 on the low-frequency first communication signal S1.

[0044] In some embodiments, as Figure 5 As shown, the bus monitoring system further includes a plurality of switching devices 50. The switching devices 50 are disposed between each of the high-speed master module 202 and the high-speed slave module 321 and the carrier communication line 10. When the switching devices 50 are closed, the high-speed slave module 321 can transmit a second communication signal S2 to the high-speed master module 202 via the carrier communication line 10 at a second frequency band. When the switching devices 50 are open, at least one of the first low-speed slave module 311 and the second low-speed slave module 322 can transmit a first communication signal S1 to the low-speed master module 201 via the carrier communication line 10 at a first frequency band. Figure 6 Shown Figure 5 The example transmission sequence of the first communication signal S1 and the second communication signal S2 in the bus monitoring system is shown. Figure 6As shown, when the first communication signal S1 needs to be transmitted, the switch device 50 can be opened, disconnecting the second communication signal S2 from the carrier communication line 10, thereby preventing the high-frequency second communication signal S2 from interfering with the low-frequency first communication signal S1. When the second communication signal S2 needs to be transmitted, the switch device 50 can be closed to ensure normal transmission of the second communication signal S2. This arrangement allows the first communication signal S1 and the second communication signal S2 to be periodically transmitted at different time intervals by controlling the on / off state of the switch device 50, thereby achieving reliable transmission of measurement data.

[0045] In some embodiments, the switch device 50 may include a relay. In other embodiments, the switch device 50 may include an electronic switch. In other embodiments, the switch device 50 may also include other types, which are not limited by the embodiments of the present disclosure.

[0046] Figure 7 A schematic structural diagram of a bus monitoring system according to some embodiments of the present disclosure is shown. Figure 7 The architecture of the busbar monitoring system shown is similar to Figure 1 The architecture of the busbar monitoring system shown is similar. Next, the differences between them will be mainly described, and the same parts will not be repeated.

[0047] In some embodiments, the second communication slave 32 may further include a measurement data converter 323, which is connected to a measurement device such as an electric meter 60 and installed together with the measurement device in the busbar plug-in box 62. The measurement data converter 323 may convert the measurement data received from the measurement device into a second communication signal S2 for transmission by the high-speed slave module 321. Each first communication slave 32 may be formed as a measurement unit and disposed on the busbar.

[0048] In some embodiments, the first low-speed slave module 311 and the second low-speed slave module 322 can be respectively formed in corresponding measurement cells. The measurement cells can be installed at different positions on the busbar, and each measurement cell can be provided with an expansion slot. At the position where the second communication signal S2 needs to be transmitted, the second high-speed slave module 321 can be inserted into the expansion slot of the corresponding measurement cell to transmit the second communication signal S2.

[0049] While various implementations of the present disclosure have been described above, the foregoing description is intended to be illustrative, not exhaustive, and not limited to the disclosed implementations. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described implementations. The terminology used herein is selected to best explain the principles of the implementations, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the various implementations disclosed herein.

Claims

1. A busbar monitoring system, comprising: A carrier communication line (10) comprises a first conductor (101) and a second conductor (102), wherein the first conductor (101) is adapted to be connected to the positive pole of a DC power supply, and the second conductor (102) is adapted to be connected to the negative pole of the DC power supply, and the carrier communication line (10) is capable of simultaneously transmitting a first communication signal and a second communication signal, wherein the first communication signal indicates a first characteristic of a busbar, and the second communication signal indicates a second characteristic of the busbar; A communication host (20) is connected to the carrier communication line (10) and comprises a low-speed host module (201) and a high-speed host module (202), wherein the low-speed host module (201) is configured to receive the first communication signal transmitted by the carrier communication line (10) at a first frequency band, and the high-speed host module (202) is configured to receive the second communication signal transmitted by the carrier communication line (10) at a second frequency band, wherein the second frequency band is higher than the first frequency band; A first communication slave (31) is connected to the carrier communication line (10) and comprises a first low-speed slave module (311), wherein the first low-speed slave module (311) is configured to transmit the first communication signal to the low-speed master module (201) via the carrier communication line (10) at the first frequency band; as well as The second communication slave (32) is connected to the carrier communication line (10) and includes a high-speed slave module (321). The high-speed slave module (321) is configured to transmit the second communication signal to the high-speed master module (202) via the carrier communication line (10) in the second frequency band.

2. The bus monitoring system according to claim 1, wherein the second communication slave (32) further comprises a second low-speed slave module (322), and the second low-speed slave module (322) is configured to transmit the first communication signal to the low-speed master module (201) via the carrier communication line (10) in the first frequency band.

3. The busbar monitoring system according to claim 2, further comprising: A low-pass filter (40) is provided between at least one of the low-speed master module (201), the first low-speed slave module (311), and the second low-speed slave module (322) and the carrier communication line (10).

4. The busbar monitoring system according to claim 2, further comprising: A switch device (50) is provided between each of the high-speed host module (202) and the high-speed slave module (321) and the carrier communication line (10), wherein when the switch device (50) is closed, the high-speed slave module (321) transmits the second communication signal to the high-speed host module (202) via the carrier communication line (10) at the second frequency band, and when the switch device (50) is disconnected, at least one of the first low-speed slave module (311) and the second low-speed slave module (322) transmits the first communication signal to the low-speed host module (201) via the carrier communication line (10) at the first frequency band. 5 . The busbar monitoring system according to claim 1 , wherein the first characteristic comprises at least one of temperature and torque, and the second characteristic comprises meter data.

6. The bus monitoring system according to claim 1, wherein the second communication slave (32) further comprises a measurement data converter (323), the measurement data converter (323) being connected to a measuring device and being installed together with the measuring device in a bus junction box (62), the measurement data converter (323) being configured to convert the measurement data received from the measuring device into the second communication signal for transmission by the high-speed slave module (321).

7. The bus monitoring system according to claim 2, wherein the second low-speed slave module (322) is installed in a measuring unit, and an expansion slot is provided on the measuring unit, and the expansion slot is suitable for plugging in the second high-speed slave module (321).

8. The bus monitoring system according to claim 2, wherein the second communication slave (32) further comprises: a receiving unit (324) configured to receive measurement data from a measurement device; as well as A micro control unit (325) is coupled to the receiving unit (324) and the high-speed slave module (321), and is configured to convert the measurement data into the second communication signal and transmit the second communication signal to the high-speed slave module (321).

9. The bus monitoring system according to claim 8, wherein the second communication slave (32) further comprises: A storage unit (326) is configured to store the measurement data.

10. The bus monitoring system according to claim 8, wherein the second communication slave (32) further comprises: an isolated power converter (327) adapted to be connected to a power source and to perform DC-DC conversion on the power source; as well as An isolation circuit (328) is provided between the receiving unit (324) and the micro control unit (325).

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