Monitoring node equipment and linear monitoring system
By using differential signal conversion and data recovery technology in the monitoring node equipment, the problem of limited communication rate in the existing technology has been solved, and low power consumption, long distance and high speed communication effect has been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-10
- Publication Date
- 2026-04-10
AI Technical Summary
In existing technologies, the communication rate of RS485/CAN bus daisy chain is limited by the number of nodes and cable length, which cannot meet the high-speed communication requirements of multiple nodes and long distances.
The monitoring node equipment, including a first transceiver, a second transceiver, a processor, and a communication module, converts differential signals into single-ended signals and performs data recovery. Combined with the data recovery unit and switch control, it solves the problem of bit width offset accumulation and ensures the quality and rate of communication signals.
It achieves low-power, long-distance, and high-speed communication, with a communication rate of 12Mbps and no packet loss, thus improving the reliability and efficiency of the communication link.
Smart Images
Figure CN121841899A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of monitoring, in particular to a kind of monitoring node device and linear monitoring system. BACKGROUND
[0002] Line type equipment (also known as rubber belt conveyor or belt conveyor) as an important transport equipment, is widely applied to each field.Line type equipment can normal operation for its system is significant, so need to be monitored by distributed online monitoring system to the running status of line type equipment.Distributed online monitoring system is usually provided with one or more sensor chain, and serial communication has the characteristics of simple structure, low power consumption and low hardware cost, is one of the most commonly used communication methods.
[0003] In the prior art, RS485 / CAN bus daisy chain is usually used to mount dozens of nodes, a host computer communicates with the remaining slave computers, and the communication rate is limited by the number of nodes and the length of cable.As the coverage area of serial bus expands, the communication distance and rate are limited, and whether the number of nodes increases or the communication distance increases, the communication rate will inevitably decrease, and the existing scheme cannot meet the requirements of multi-node, long-distance and high-speed communication. SUMMARY
[0004] The purpose of the present application is to provide a kind of monitoring node device and linear monitoring system to improve the above problems.
[0005] In order to achieve the above purpose, the technical solutions adopted by the embodiments of the present application are as follows: In a first aspect, the embodiments of the present application provide a kind of monitoring node device, the monitoring node device includes: first transceiver, second transceiver, processor and communication module; The processor is connected with the communication module, the first end of the first transceiver is connected to the downlink input end of the communication module, the second end of the first transceiver is connected to the uplink output end of the communication module, the first end of the second transceiver is connected to the downlink output end of the communication module, and the second end of the second transceiver is connected to the uplink input end of the communication module; The first transceiver and the second transceiver are used to convert the received differential signal into single-ended signal, and send single-ended signal to the communication module; The communication module is used for data recovery according to the received single-ended signal, and sends the recovered downlink serial data to the second transceiver, and sends the recovered uplink serial data to the first transceiver; The first transceiver is used to convert the received uplink serial data into uplink differential signal, and send to front end; The second transceiver is configured to convert the received downstream serial data into downstream differential signals and transmit the downstream differential signals to the backend; The processor is further configured to cut off an uplink path in the communication module during an uplink period of the node to transmit an uplink signal of the node to the first transceiver.
[0006] Optionally, the communication module comprises a first data recovery unit, a second data recovery unit and a first switch. An input end of the first data recovery unit is connected to a first end of the first transceiver, and an output end of the first data recovery unit is connected to a first end of the second transceiver. An input end of the second data recovery unit is connected to a second end of the second transceiver, an output end of the second data recovery unit is connected to a first end of the first switch, a second end of the first switch is connected to an output end of the processor, a third end of the first switch is connected to a second end of the first transceiver, and a control end of the first switch is connected to the processor. The processor is configured to control the second end and the third end of the first switch to be conductive during an uplink period of the node and control the first end and the third end of the first switch to be conductive during a data transparent transmission period. The first data recovery unit is configured to perform data recovery on the single-end signal output by the first transceiver and transmit the recovered downstream serial data to the second transceiver. The second data recovery unit is configured to perform data recovery on the single-end signal output by the second transceiver during the data transparent transmission period and transmit the recovered uplink serial data to the first transceiver through the first switch.
[0007] Optionally, the first data recovery unit comprises a first byte analysis module and a first byte forwarding module. An input end of the first byte analysis module is connected to a first end of the first transceiver, an output end of the first byte analysis module is connected to an input end of the first byte forwarding module, and an output end of the first byte forwarding module is connected to a first end of the second transceiver. The first byte analysis module is configured to analyze the single-end signal output by the first transceiver and transmit the analyzed downstream byte data to the first byte forwarding module. The first byte forwarding module is configured to forward the received downstream byte data, generate recovered downstream serial data, and transmit the recovered downstream serial data to the second transceiver.
[0008] Optionally, the second data recovery unit comprises a second byte analysis module and a second byte forwarding module. The input of the second byte parsing module is connected to the second terminal of the second transceiver, the output of the second byte parsing module is connected to the input of the second byte forwarding module, and the output of the second byte forwarding module is connected to the first terminal of the first switch. The second byte parsing module is used to parse the single-ended signal output by the second transceiver and transmit the parsed uplink byte data to the second byte forwarding module; The second byte forwarding module is used to forward the received uplink byte data, generate the recovered uplink serial data, and send the recovered uplink serial data to the second transceiver during the data pass-through period.
[0009] Optionally, the first byte forwarding module and the second byte forwarding module employ bit-buffered forwarding.
[0010] Optionally, the communication module further includes a byte de-slowing module and a third data adaptation unit; The input terminal of the byte reduction module is connected to the first data recovery unit, and the output terminal of the byte reduction module is connected to the serial signal port of the processor. The high-speed interface of the processor is connected to the input terminal of the third data adapter unit, and the output terminal of the third data adapter unit is connected to the second terminal of the first switch. The byte reduction module is used to reduce the downlink byte data obtained by parsing the single-ended signal output by the first transceiver from the first data recovery unit, and then transmit the reduced byte data to the processor. During the uplink period of this node, the processor transmits the uplink signal of this node to the third data adaptation unit; The third data adaptation unit is used to convert the uplink signal of this node into serial data adapted to the first transceiver, and transmit the converted serial data to the first transceiver.
[0011] Optionally, the third data adaptation unit includes a third byte parsing module and a third byte forwarding module; The input of the third byte parsing module is connected to the high-speed interface of the processor, the output of the third byte parsing module is connected to the input of the third byte forwarding module, and the output of the third byte forwarding module is connected to the second terminal of the first switch. The third byte parsing module is used to convert the uplink signal of this node into byte data and transmit the byte data to the third byte forwarding module; The third byte forwarding module is used to convert the received byte data into serial data adapted to the first transceiver, and transmit the converted serial data to the first transceiver.
[0012] Optionally, one or more bytes may be used to represent a valid bit in the downlink differential signal received by the first transceiver; The byte reduction module is used to identify the downlink byte data output by the first data recovery unit, thereby converting each downlink byte in the downlink byte data into a corresponding valid bit to obtain the reduced byte data.
[0013] Optionally, when the number of 0s in the next row byte is greater than or equal to the first threshold, the corresponding valid bit is 0; when the number of 0s in the next row byte is less than the first threshold, the corresponding valid bit is 1.
[0014] Optionally, the downlink differential signal received by the first transceiver may have two consecutive stop bits.
[0015] Optionally, the communication module further includes a second switch; The two ends of the second switch are respectively connected to the first end of the first transceiver and the first end of the second transceiver, and the control end of the second switch is connected to the processor; When this node is configured for cache forwarding, the processor controls the second switch to turn off; When this node is configured for direct drive, the processor controls the second switch to close.
[0016] Secondly, embodiments of the present invention provide a linear monitoring system, the linear monitoring system including a communication front-end unit and a monitoring communication link, the monitoring communication link including a plurality of nodes connected in sequence, at least one of which is the aforementioned monitoring node device.
[0017] Compared to existing technologies, the monitoring node device and linear monitoring system provided in this invention include: a first transceiver, a second transceiver, a processor, and a communication module. The processor is connected to the communication module. A first terminal of the first transceiver is connected to the downlink input terminal of the communication module, and a second terminal of the first transceiver is connected to the uplink output terminal of the communication module. A first terminal of the second transceiver is connected to the downlink output terminal of the communication module, and a second terminal of the second transceiver is connected to the uplink input terminal of the communication module. The communication module has data recovery capabilities. By performing data recovery, it can effectively solve the problem of accumulated bit width offset caused by the increase in communication link distance, ensuring the communication signal quality and communication rate in the communication link, thereby increasing the communication distance. The measured communication rate reaches 12Mbps without packet loss.
[0018] 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
[0019] 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.
[0020] Figure 1 This is a communication link block diagram of a linear monitoring system provided in an embodiment of the present invention.
[0021] Figure 2 This is one of the structural schematic diagrams of the monitoring node device provided in an embodiment of the present invention.
[0022] Figure 3 This is the second structural schematic diagram of the monitoring node device provided in an embodiment of the present invention.
[0023] Figure 4 This is a schematic diagram of bit buffer forwarding provided in an embodiment of the present invention.
[0024] Figure 5 This is a schematic diagram of byte cache forwarding provided in an embodiment of the present invention.
[0025] Figure 6 This is the third structural schematic diagram of the monitoring node device provided in the embodiment of the present invention.
[0026] Figure 7 This is a schematic diagram illustrating the principle of serial speed-reducing communication provided in an embodiment of the present invention.
[0027] Figure 8 This is a schematic diagram of direct drive provided in an embodiment of the present invention. Detailed Implementation
[0028] 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.
[0029] 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.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] 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.
[0034] 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.
[0035] This invention provides a linear monitoring system that is an online monitoring system that combines low power consumption, long distance, and high-speed communication. Please refer to... Figure 1 , Figure 1This is a communication link block diagram of a linear monitoring system provided in an embodiment of the present invention. The linear monitoring system includes a communication front-end unit and a monitoring communication link. The monitoring communication link includes multiple nodes connected in sequence, wherein at least one node is a monitoring node device described below.
[0036] exist Figure 1 The communication link of the linear series online monitoring system shown includes n nodes. The communication front-end is connected to the first node, the first node is connected to the second node, and so on, with a total of n nodes.
[0037] The communication front-end sends data to the nodes via a downlink broadcast communication link. First, the communication front-end sends data to the first node. The first node receives the data and then sends it to the second node. The data is then sent to the next level through adjacent nodes. Finally, the nth node receives the data sent by the (n-1)th node. That is, all nodes can receive the data sent by the communication front-end.
[0038] The data sent from the node to the communication front-end is the uplink data communication link. The main function of the linear serial online monitoring system is for the node to collect and send data to the communication front-end. At any given time, only one node's data is being transmitted on the communication link. Node i that meets the transmission conditions sends its collected data to node (i-1). The data is then sent sequentially to the next level through adjacent nodes. Finally, the communication front-end receives the data sent by the first node, meaning that the communication front-end can receive data sent by all nodes.
[0039] It should be noted that, in Figure 1 The linear monitoring system shown has two node modes: direct drive mode and buffered forwarding mode. Compared to a system where all nodes are in buffered forwarding mode, only some nodes can be configured for buffered forwarding. For example, nodes 1, 2, 3, and 4 can be directly driven, while node 5 performs buffered forwarding to correct bit width offset. Overall, there is only one byte of buffer latency for every five adjacent nodes. This scheme reduces the total latency to 1 / 5 of the scheme where all nodes are in buffered forwarding mode, thus reducing the number of nodes requiring buffered forwarding and consequently lowering latency.
[0040] The instruction manual specifies that whether to enable the buffered forwarding function can be flexibly determined by the forwarding strategy. For example, when the signal quality of a node with the buffered forwarding function enabled exceeds the shift threshold, the buffered forwarding function of that node can be disabled, allowing it to drive directly, and the buffered forwarding function can be enabled on its next node. When the signal quality of any node is lower than the identification threshold, the buffered forwarding function can be enabled on its previous node.
[0041] Regarding the structure of the monitoring node device mentioned above, this embodiment of the invention also provides an optional implementation method, please refer to... Figure 2 , Figure 2This is one of the structural schematic diagrams of a monitoring node device provided in an embodiment of the present invention. In the figure, 1, 2, 3, and 4 represent the first, second, third, and fourth terminals of the corresponding devices. The monitoring node device includes: a first transceiver, a second transceiver, a processor, and a communication module. The processor may, but is not limited to, a microcontroller unit (MCU), and the communication module may, but is not limited to, a field-programmable gate array (FPGA).
[0042] The processor is connected to the communication module. The first end of the first transceiver is connected to the downlink input of the communication module, and the second end of the first transceiver is connected to the uplink output of the communication module. The first end of the second transceiver is connected to the downlink output of the communication module, and the second end of the second transceiver is connected to the uplink input of the communication module.
[0043] The third terminal of the first transceiver is used to connect to the downlink output terminal of the upper-level node, and the third and fourth terminals of the first transceiver are used to connect to the uplink input terminal of the upper-level node. The third terminal of the second transceiver is used to connect to the downlink input terminal of the lower-level node, and the fourth terminal of the second transceiver is used to connect to the downlink output terminal of the lower-level node. The upper-level node can be a communication front-end device, a master node, or the previous monitoring node device, and the lower-level node is the next monitoring node device.
[0044] Differential communication is used between monitoring node devices and upper-level and lower-level nodes. It can be, but is not limited to, RS422 / RS485 / LVDS / CAN serial communication, and is not limited to two pairs of differential lines. It is also applicable to multiple pairs of differential lines. The communication method should not be limited to full-duplex, but can also be multiple pairs of half-duplex. To expand the protection scope, multiple pairs of half-duplex communication is required. After the master and slave are determined in the half-duplex of point-to-point communication, the two pairs of differential lines become full-duplex. That is, full-duplex is composed of two pairs of half-duplex differential lines.
[0045] The first and second transceivers are used to convert the received differential signals (including downlink differential signals and uplink differential signals) into single-ended signals (including downlink single-ended signals and uplink single-ended signals), and send the single-ended signals to the communication module.
[0046] Specifically, the first transceiver is used to convert the downlink differential signal into a downlink single-ended signal, and the second transceiver is used to convert the uplink differential signal into an uplink single-ended signal. The downlink differential signal is a differential signal sent backward by the upper-level node, and the uplink differential signal is a differential signal sent forward by the lower-level node.
[0047] The communication module is used to recover data based on the received single-ended signal, and send the recovered downlink serial data to the second transceiver and the recovered uplink serial data to the first transceiver.
[0048] By performing data recovery, the quality of communication signals and the communication rate in the communication link are guaranteed, thereby increasing the communication distance. The actual measured communication rate reached 12Mbps without packet loss.
[0049] The first transceiver is used to convert the received uplink serial data into uplink differential signals and send them to the front end.
[0050] The second transceiver is used to convert the received downlink serial data into downlink differential signals and send them to the backend.
[0051] The processor is also used to cut off the uplink path in the communication module during the uplink period of this node (which can be configured by the communication front-end) in order to send the uplink signal of this node to the first transceiver.
[0052] The uplink time period can be configured by the communication front-end machine. At any given time, only one node is in the uplink time period, and its data can be transmitted in the uplink communication link.
[0053] The processor (which may be the serial receiver module) is used to parse the single-ended signal output by the first transceiver to obtain the corresponding byte data. It should be noted that the processor output interface can be an uplink differential signal or a high-speed interface such as SPI / DSPI / QSPI / OSPI / SDIO.
[0054] Compared to the UART interface of a conventional MCU, which has a maximum speed of only 3Mbps, the SPI / Dual-SPI / QSPI / OSPI of a conventional MCU can reach speeds of 50 / 400 / 1000Mbps. There is also a similar high-speed interface, SDIO, with a speed of up to 200Mbps.
[0055] In the monitoring node device provided in this embodiment of the invention, the communication module has data recovery capability. By performing data recovery, the problem of bit width offset accumulation caused by the increase of communication link distance can be well solved, ensuring the communication signal quality and communication rate in the communication link, thereby increasing the communication distance. The actual measured communication rate is up to 12Mbps without packet loss.
[0056] Building upon the foregoing, this invention also provides an optional implementation method regarding the specific structure of each module in the monitoring node device. Please refer to [link / reference needed]. Figure 3 , Figure 3 This is the second structural schematic diagram of the monitoring node device provided in an embodiment of the present invention.
[0057] The communication module includes a first data recovery unit, a second data recovery unit, and a first switch SW1.
[0058] The input terminal of the first data recovery unit (serving as the downlink input terminal of the communication module) is connected to the first terminal of the first transceiver, and the output terminal of the first data recovery unit (serving as the downlink output terminal of the communication module) is connected to the first terminal of the second transceiver.
[0059] The input terminal of the second data recovery unit (as the uplink input terminal of the communication module) is connected to the second terminal of the second transceiver. The output terminal of the second data recovery unit is connected to the first terminal of the first switch SW1. The second terminal of the first switch SW1 is connected to the output terminal of the processor. The third terminal of the first switch SW1 (as the uplink output terminal of the communication module) is connected to the second terminal of the first transceiver. The control terminal of the first switch SW1 is connected to the processor.
[0060] The processor is used to control the second and third terminals of the first switch SW1 to be turned on during the uplink period of this node, and to control the first and third terminals of the first switch SW1 to be turned on during the data pass-through period.
[0061] When the first terminal of the first switch SW1 is connected to the third terminal, the uplink path in the communication module is open; when the second terminal of the first switch SW1 is connected to the third terminal, the uplink path in the communication module is closed. The data pass-through period can be any period other than the uplink period of this node, or a period set by the communication front-end. Of course, the first switch SW1 can also be in a suspended state, in which case the uplink data feedback to the first transceiver will be completely cut off.
[0062] The first data recovery unit is used to recover the data from the single-ended signal output by the first transceiver and send the recovered downlink serial data to the second transceiver.
[0063] The second data recovery unit is used to recover the single-ended signal output by the second transceiver during the data pass-through period, and to send the recovered uplink serial data to the first transceiver through the first switch SW1.
[0064] The processor is used to send the uplink signal of this node to the first transceiver through the first switch SW1 during the uplink period of this node.
[0065] Before the signal becomes distorted, data is recovered by parsing and re-forwarding, thus ensuring communication quality.
[0066] Please continue to refer to this. Figure 3 The first data recovery unit includes a first byte parsing module and a first byte forwarding module.
[0067] The input of the first byte parsing module (which serves as the downlink input of the communication module) is connected to the first end of the first transceiver. The output of the first byte parsing module is connected to the input of the first byte forwarding module. The output of the first byte forwarding module (which serves as the downlink output of the communication module) is connected to the first end of the second transceiver.
[0068] The first byte parsing module is used to parse the single-ended signal output by the first transceiver and transmit the parsed downlink byte data to the first byte forwarding module.
[0069] The first byte forwarding module is used to forward the received downlink byte data, generate the recovered downlink serial data, and send the recovered downlink serial data to the second transceiver.
[0070] The second data recovery unit includes a second byte parsing module and a second byte forwarding module.
[0071] The input terminal of the second byte parsing module (which serves as the uplink input terminal of the communication module) is connected to the second terminal of the second transceiver, the output terminal of the second byte parsing module is connected to the input terminal of the second byte forwarding module, and the output terminal of the second byte forwarding module is connected to the first terminal of the first switch SW1.
[0072] The second byte parsing module is used to parse the single-ended signal output by the second transceiver and transmit the parsed uplink byte data to the second byte forwarding module.
[0073] The second byte forwarding module is used to forward the received uplink byte data, generate the recovered uplink serial data, and send the recovered uplink serial data to the second transceiver during the data pass-through period.
[0074] In this embodiment of the invention, the first byte forwarding module and the second byte forwarding module adopt bit buffer forwarding. According to the agreed baud rate, after a serial data bit is sampled and determined, the bit is forwarded immediately, and the buffer delay is reduced to 1 / 10 of the original, with a significant delay optimization effect.
[0075] Of course, you can also collect byte cache forwarding, that is, cache a complete byte before forwarding, which has a one-byte cache delay.
[0076] Please refer to Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of bit buffer forwarding provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of byte buffer forwarding provided in an embodiment of the present invention. In byte buffer forwarding, the buffer delay from receiving a byte to forwarding a byte is one byte, while the buffer delay for bit buffer forwarding is one bit, resulting in significant delay optimization.
[0077] Building upon the foregoing, this invention also provides an optional implementation method for further improving communication speed. Please refer to [link / reference needed]. Figure 6 , Figure 6 This is the third structural schematic diagram of the monitoring node device provided in the embodiment of the present invention.
[0078] The communication module also includes a byte deceleration module and a third data adapter.
[0079] The input of the byte reduction module is connected to the first data recovery unit. Specifically, the input of the byte reduction module is connected to the output of the first byte parsing module therein, and the output of the byte reduction module is connected to the processor's serial signal port (UART_RX).
[0080] In one alternative implementation, the byte reduction module has its own parsing function, which can be directly connected to the output of the first transceiver to independently perform byte parsing and reduction functions.
[0081] The processor's high-speed interface is connected to the input terminal of the third data adapter unit, and the output terminal of the third data adapter unit is connected to the second terminal of the first switch SW1.
[0082] The byte reduction module is used to reduce the downlink byte data obtained by parsing the single-ended signal output by the first transceiver from the first data recovery unit, and then transmit the reduced byte data to the processor.
[0083] The downlink rate is reduced to 1 / n, where n is a positive integer, such as 1 / 10, 1 / 11, or 1 / 12. The explanation is as follows: 1 / 10 consists of 1 start bit, 8 data bits, and 1 stop bit; 1 / 11 consists of 1 start bit, 8 data bits, and 2 stop bits; 1 / 12 consists of 1 start bit, 8 data bits, 1 parity bit, and 2 stop bits. In some scenarios, the number of data bits can also be 4.
[0084] During the uplink period of this node, the processor transmits the uplink signal of this node to the third data adaptation unit.
[0085] The third data adaptation unit is used to convert the uplink signal of this node into serial data that is compatible with the first transceiver, and transmit the converted serial data to the first transceiver.
[0086] exist Figure 3 In the structure shown, the processor is connected to the input of the first data recovery unit to directly acquire the single-ended signal output by the first transceiver and parse the byte data therein. At this time, it is necessary to ensure that the communication rate on the communication link matches the serial communication rate of the processor. The serial communication rate of the processor limits the communication rate of the downlink communication link.
[0087] exist Figure 6In the structure shown, by setting up a byte downscaling module, the limitation of the processor's serial communication rate on the downlink communication rate is eliminated, which can increase the bus communication rate, even up to n times the processor's serial communication rate (n is a positive integer). Furthermore, the termination module required for the processor to receive the downscaled byte data has lower performance requirements, lower cost, and lower power consumption, making it more feasible to implement.
[0088] Compared to Figure 3 In the structure shown, the processor is directly connected to the second terminal of the first switch via the serial interface UART_TX. Figure 6 The structure shown can greatly improve the communication rate of the uplink communication link by setting up a high-speed interface in conjunction with a data adapter unit.
[0089] Alternatively, please continue to refer to Figure 6 The third data adaptation unit includes a third byte parsing module and a third byte forwarding module.
[0090] The input of the third byte parsing module is connected to the high-speed interface of the processor, the output of the third byte parsing module is connected to the input of the third byte forwarding module, and the output of the third byte forwarding module is connected to the second terminal of the first switch SW1.
[0091] The third-byte parsing module is used to convert the uplink signals of this node into byte data and transmit the byte data to the third-byte forwarding module.
[0092] The third byte forwarding module is used to convert the received byte data into serial data that is compatible with the first transceiver, and then transmit the converted serial data to the first transceiver.
[0093] Building upon the preceding text, this embodiment of the invention also provides an optional implementation method for the byte-based speed reduction logic. In the downlink differential signal (including broadcast commands and firmware upgrade packages) received by the first transceiver, one or more bytes represent a valid bit; The byte reduction module is used to identify the downlink byte data output by the first data recovery unit, thereby converting each downlink byte in the downlink byte data into the corresponding valid bits to obtain the reduced byte data.
[0094] For details, please refer to Figure 7 , Figure 7 This is a schematic diagram illustrating the serial speed-reduction communication principle provided in an embodiment of the present invention. The front-end of the communication transmitter encodes the data, using one bit to represent one valid bit. For example, byte 0x00 represents logic 0, which can represent the start bit and 0, and byte 0x3F (not limited to this, multiple bytes of data with 1 bits) represents logic 1, which can represent the stop bit and 1.
[0095] Optionally, when the number of 0s in the next byte is greater than or equal to the first threshold (which may be but is not limited to 5), the corresponding valid bit is 0; when the number of 0s in the next byte is less than the first threshold, the corresponding valid bit is 1.
[0096] Optionally, the downlink differential signal received by the first transceiver includes two consecutive stop bits. Adding two stop bits resolves the stop bit error problem and improves anti-interference capability. If there is only one stop bit, there is a probability of sampling an edge, leading to stop bit identification errors.
[0097] Optionally, the communication module may also include a second switch (not shown in the figure).
[0098] The two ends of the second switch are respectively connected to the first end of the first transceiver and the first end of the second transceiver, and the control end of the second switch is connected to the processor.
[0099] Alternatively, the two ends of the second switch are connected to the second ends of the first transceiver and the second transceiver, respectively, and the control end of the second switch is connected to the processor.
[0100] When this node is configured for cache forwarding, the processor controls the second switch to turn off.
[0101] Serial transceiver connection cables suffer from poor signal integrity on long lines. Since adjacent nodes are driven directly without byte / bit buffering, the cables should not be too long. Short lines solve the signal integrity problem, and buffered forwarding solves the bit width offset accumulation problem.
[0102] When this node is configured as a direct driver, the processor controls the second switch to close.
[0103] Please refer to Figure 8 , Figure 8 This is a schematic diagram of a direct drive provided in an embodiment of the present invention. The direct drive mode uses only a hardware transceiver chip and there is no byte delay.
[0104] In one alternative implementation, the first byte parsing module, the first byte forwarding module, the second byte parsing module, the second byte forwarding module, the third byte parsing module, the third byte forwarding module, and the switch SW1 can be integrated and deployed in the same field programmable gate array (FPGA).
[0105] In summary, the present invention provides a monitoring node device and a linear monitoring system. The monitoring node device includes a first transceiver, a second transceiver, a processor, and a communication module. The processor is connected to the communication module. A first terminal of the first transceiver is connected to the downlink input terminal of the communication module, and a second terminal of the first transceiver is connected to the uplink output terminal of the communication module. A first terminal of the second transceiver is connected to the downlink output terminal of the communication module, and a second terminal of the second transceiver is connected to the uplink input terminal of the communication module. The communication module has data recovery capabilities. By performing data recovery, it can effectively solve the problem of accumulated bit width offset caused by the increase of communication link distance, ensuring the communication signal quality and communication rate in the communication link, thereby increasing the communication distance. The measured communication rate reaches 12Mbps without packet loss.
[0106] 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.
[0107] 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 monitoring node device, characterized in that, The monitoring node device includes: a first transceiver, a second transceiver, a processor, and a communication module; The processor is connected to the communication module. The first end of the first transceiver is connected to the downlink input of the communication module, the second end of the first transceiver is connected to the uplink output of the communication module, the first end of the second transceiver is connected to the downlink output of the communication module, and the second end of the second transceiver is connected to the uplink input of the communication module. The first transceiver and the second transceiver are used to convert the received differential signal into a single-ended signal and send the single-ended signal to the communication module; The communication module is used to recover data based on the received single-ended signal, and send the recovered downlink serial data to the second transceiver, and send the recovered uplink serial data to the first transceiver. The first transceiver is used to convert the received uplink serial data into uplink differential signals and send them to the front end; The second transceiver is used to convert the received downlink serial data into downlink differential signals and send them to the backend; The processor is also configured to cut off the uplink path in the communication module during the uplink period of this node, so as to send the uplink signal of this node to the first transceiver.
2. The monitoring node device as described in claim 1, characterized in that, The communication module includes a first data recovery unit, a second data recovery unit, and a first switch; The input terminal of the first data recovery unit is connected to the first terminal of the first transceiver, and the output terminal of the first data recovery unit is connected to the first terminal of the second transceiver; The input terminal of the second data recovery unit is connected to the second terminal of the second transceiver, the output terminal of the second data recovery unit is connected to the first terminal of the first switch, the second terminal of the first switch is connected to the output terminal of the processor, the third terminal of the first switch is connected to the second terminal of the first transceiver, and the control terminal of the first switch is connected to the processor. The processor is used to control the second and third terminals of the first switch to be turned on during the uplink period of this node, and to control the first and third terminals of the first switch to be turned on during the data pass-through period. The first data recovery unit is used to recover the data from the single-ended signal output by the first transceiver and send the recovered downlink serial data to the second transceiver; The second data recovery unit is used to recover the single-ended signal output by the second transceiver during the data pass-through period, and to send the recovered uplink serial data to the first transceiver through the first switch.
3. The monitoring node device as described in claim 2, characterized in that, The first data recovery unit includes a first byte parsing module and a first byte forwarding module; The input of the first byte parsing module is connected to the first end of the first transceiver, the output of the first byte parsing module is connected to the input of the first byte forwarding module, and the output of the first byte forwarding module is connected to the first end of the second transceiver. The first byte parsing module is used to parse the single-ended signal output by the first transceiver and transmit the parsed downlink byte data to the first byte forwarding module; The first byte forwarding module is used to forward the received downlink byte data, generate the recovered downlink serial data, and send the recovered downlink serial data to the second transceiver.
4. The monitoring node device as described in claim 2, characterized in that, The second data recovery unit includes a second byte parsing module and a second byte forwarding module; The input of the second byte parsing module is connected to the second terminal of the second transceiver, the output of the second byte parsing module is connected to the input of the second byte forwarding module, and the output of the second byte forwarding module is connected to the first terminal of the first switch. The second byte parsing module is used to parse the single-ended signal output by the second transceiver and transmit the parsed uplink byte data to the second byte forwarding module; The second byte forwarding module is used to forward the received uplink byte data, generate the recovered uplink serial data, and send the recovered uplink serial data to the second transceiver during the data pass-through period.
5. The monitoring node device as described in claim 3 or 4, characterized in that, The first byte forwarding module in the first data recovery unit and the second byte forwarding module in the second data recovery unit adopt bit buffer forwarding.
6. The monitoring node device as described in claim 2, characterized in that, The communication module also includes a byte de-speeding module; The input terminal of the byte reduction module is connected to the first data recovery unit, and the output terminal of the byte reduction module is connected to the serial signal port of the processor. The byte reduction module is used to reduce the downlink byte data obtained by parsing the single-ended signal output by the first transceiver from the first data recovery unit, and then transmit the reduced byte data to the processor.
7. The monitoring node device as described in claim 2, characterized in that, The communication module also includes a third data adaptation unit; The high-speed interface of the processor is connected to the input terminal of the third data adapter unit, and the output terminal of the third data adapter unit is connected to the second terminal of the first switch. During the uplink period of this node, the processor transmits the uplink signal of this node to the third data adaptation unit; The third data adaptation unit is used to convert the uplink signal of this node into serial data adapted to the first transceiver, and transmit the converted serial data to the first transceiver.
8. The monitoring node device as described in claim 7, characterized in that, The third data adaptation unit includes a third byte parsing module and a third byte forwarding module; The input of the third byte parsing module is connected to the high-speed interface of the processor, the output of the third byte parsing module is connected to the input of the third byte forwarding module, and the output of the third byte forwarding module is connected to the second terminal of the first switch. The third byte parsing module is used to convert the uplink signal of this node into byte data and transmit the byte data to the third byte forwarding module; The third byte forwarding module is used to convert the received byte data into serial data adapted to the first transceiver, and transmit the converted serial data to the first transceiver.
9. The monitoring node device as described in claim 6, characterized in that, In the downlink differential signal received by the first transceiver, one or more bytes are used to represent a valid bit; The byte reduction module is used to identify the downlink byte data output by the first data recovery unit, thereby converting each downlink byte in the downlink byte data into a corresponding valid bit to obtain the reduced byte data.
10. The monitoring node device as described in claim 9, characterized in that, When the number of 0s in the downlink byte is greater than or equal to the first threshold, its corresponding valid bit is 0; when the number of 0s in the downlink byte is less than the first threshold, its corresponding valid bit is 1.
11. The monitoring node device as described in claim 9, characterized in that, The downlink differential signal received by the first transceiver has two consecutive stop bits.
12. The monitoring node device as described in claim 2, characterized in that, The communication module also includes a second switch; The two ends of the second switch are respectively connected to the first end of the first transceiver and the first end of the second transceiver, and the control end of the second switch is connected to the processor; When this node is configured for cache forwarding, the processor controls the second switch to turn off; When this node is configured for direct drive, the processor controls the second switch to close.
13. A linear monitoring system, characterized in that, The linear monitoring system includes a communication front-end unit and a monitoring communication link. The monitoring communication link includes multiple nodes connected in sequence, and at least one node is a monitoring node device as described in any one of claims 1-12.