Telemetering system and signal conversion circuit thereof

Abstract

The utility model discloses a telemetering system and a signal conversion circuit thereof. The circuit comprises a circuit board, a first RJ45 interface, a first conversion module, a first RS422 module, a main control module, a second RS422 module, a second conversion module and a second RJ45 interface. The first RJ45 interface is arranged on one side of the circuit board, and the second RJ45 interface is arranged on the other side of the circuit board; the first RJ45 interface is electrically connected with one end of the first conversion module, the other end of the first conversion module is electrically connected with one end of the first RS422 module, the other end of the first RS422 module is electrically connected with one end of the main control module, the other end of the main control module is electrically connected with one end of the second RS422 module, the other end of the second RS422 module is electrically connected with one end of the second conversion module, and the other end of the second conversion module is electrically connected with the other end of the second conversion module. And the other end of the second conversion module is electrically connected with the second RJ45 interface. The circuit can meet the reliable data transmission requirement of a telemetering system.

Description

Technical Field

[0001] The utility model relates to the technical field of telemetry systems, in particular to a telemetry system and a signal conversion circuit thereof. Background Art

[0002] Telemetry systems play an important role in monitoring, control and data acquisition. These systems are usually composed of control devices such as bus hosts, wireless access units, and telemetry hosts. They are used to remotely monitor and control various physical parameters or processes. The wired communication between the wireless access unit and the bus host is essential for real-time data transmission and control. In many telemetry systems, the RJ45 interface is widely used for connection and communication. The RJ45 interface is usually used for traditional Ethernet communication, which is a standard communication method based on the TCP / IP protocol. However, in some telemetry applications, especially when long distance, reliability and anti-interference are required, the traditional Ethernet communication method may not be enough to meet the requirements. At this time, the use of RS-422 bus communication as a connection between wireless access units and between wireless access units and bus hosts becomes an optional solution.

[0003] RS-422 is a differential signal transmission standard that can provide high-speed, long-distance transmission and has good anti-interference performance. Its maximum supported distance is extended to 300 meters, which can fully meet the general coverage of telemetry systems. However, the traditional RJ45 interface does not support the RS-422 bus function, which makes it impossible to use the RJ45 interface in the telemetry system to implement RS-422 bus communication to meet the requirements of long distance, high reliability and anti-interference. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a telemetry system and a signal conversion circuit thereof, which can expand the RJ45 interface to support RS-422 bus communication, thereby realizing the high-speed and reliable data transmission requirements in the telemetry system.

[0005] On the one hand, the telemetry system signal conversion circuit according to the embodiment of the utility model includes:

[0006] Circuit boards;

[0007] A first RJ45 interface is provided on one side of the circuit board;

[0008] A first conversion module is arranged on the circuit board, and one end of the first conversion module is electrically connected to the first RJ45 interface;

[0009] A first RS422 module is arranged on the circuit board, one end of the first RS422 module is electrically connected to the other end of the first conversion module; the first conversion module is used to convert the single-ended signal of the first RJ45 interface and the differential signal of the first RS422 module;

[0010] A main control module is arranged on the circuit board, and one end of the main control module is electrically connected to the other end of the first RS422 module;

[0011] A second RS422 module is arranged on the circuit board, and one end of the second RS422 module is electrically connected to the other end of the main control module;

[0012] A second conversion module is arranged on the circuit board, and one end of the second conversion module is electrically connected to the other end of the second RS422 module;

[0013] A second RJ45 interface is arranged on the other side of the circuit board, and the second RJ45 interface is electrically connected to the other end of the second conversion module; the second conversion module is used to convert the single-ended signal of the second RJ45 interface and the differential signal of the second RS422 module.

[0014] According to some embodiments of the present invention, the first RJ45 interface and the second RJ45 interface are both provided with a power pin and a ground pin, the power pin is connected to a power source, and the ground pin is grounded.

[0015] According to some embodiments of the present utility model, the telemetry system signal conversion circuit further includes a TVS diode, one end of the TVS diode is electrically connected to the power pin, and the other end of the TVS diode is electrically connected to the ground pin.

[0016] According to some embodiments of the present invention, a first common-mode inductor is arranged between the first RJ45 interface and the first conversion module; and a second common-mode inductor is arranged between the second RJ45 interface and the second conversion module.

[0017] According to some embodiments of the present invention, both the first RJ45 interface and the second RJ45 interface are connected to an overvoltage protection module.

[0018] According to some embodiments of the present invention, the overvoltage protection module includes a gas discharge tube.

[0019] On the other hand, the telemetry system according to the embodiment of the present invention comprises a bus host and a plurality of wireless access units electrically connected in sequence, wherein the bus host and the wireless access units both comprise the telemetry system signal conversion circuit described above.

[0020] According to some embodiments of the present invention, the second RJ45 interface of the bus host is electrically connected to the first RJ45 interface of one of the wireless access units via a Category 6a shielded network cable, and multiple wireless access units are connected via Category 6a shielded network cables.

[0021] The telemetry system and signal conversion circuit according to the embodiment of the utility model have at least the following beneficial effects: by using a first conversion module to perform signal conversion on the first RJ45 interface and the first RS422 module, and by using a second conversion module to perform signal conversion on the second RJ45 interface and the second RS422 module, data is allowed to be transmitted from the RJ45 interface to the RS-422 bus, and the stability and integrity of the signal are ensured; by expanding the RJ45 interface to support RS422 bus communication, the high-speed and reliable data transmission requirements in the telemetry system are met, thereby improving the performance and communication capabilities of the telemetry system.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 It is a structural schematic diagram of a telemetry system signal conversion circuit according to an embodiment of the utility model;

[0025] Figure 2 It is a partial structural schematic diagram of a telemetry system signal conversion circuit according to an embodiment of the utility model;

[0026] Figure 3 A schematic diagram of the structure of the first RJ45 interface or the second RJ45 interface of an embodiment of the utility model;

[0027] Figure 4 A schematic diagram of the structure of a telemetry system according to an embodiment of the utility model;

[0028] Reference numerals:

[0029] Circuit board 100 , first RJ45 interface 200 , first RS422 module 300 , main control module 400 , second RS422 module 500 , second RJ45 interface 600 . DETAILED DESCRIPTION

[0030] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0031] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] Telemetry systems play an important role in monitoring, control and data acquisition. These systems are usually composed of control devices such as bus hosts, wireless access units, and telemetry hosts. They are used to remotely monitor and control various physical parameters or processes. The wired communication between the wireless access unit and the bus host is essential for real-time data transmission and control. In many telemetry systems, the RJ45 interface is widely used for connection and communication. The RJ45 interface is usually used for traditional Ethernet communication, which is a standard communication method based on the TCP / IP protocol. However, in some telemetry applications, especially when long distance, reliability and anti-interference are required, the traditional Ethernet communication method may not be enough to meet the requirements. At this time, the use of RS-422 bus communication as a connection between wireless access units and between wireless access units and bus hosts becomes an optional solution.

[0035] RS-422 is a differential signal transmission standard that can provide high-speed, long-distance transmission and has good anti-interference performance. Its maximum supported distance is extended to 300 meters, which can fully meet the general coverage of telemetry systems. However, the traditional RJ45 interface does not support the RS-422 bus function, which makes it impossible to use the RJ45 interface in the telemetry system to implement RS-422 bus communication to meet the requirements of long distance, high reliability and anti-interference.

[0036] To this end, an embodiment of the utility model proposes a telemetry system signal conversion circuit and a telemetry system, which are compatible with expanding the RJ45 interface to support RS422 bus communication, thereby allowing data to be transmitted from the RJ45 interface to the RS-422 bus to achieve high-speed and reliable data transmission requirements in the telemetry system, thereby improving the performance and communication capabilities of the telemetry system.

[0037] The telemetry system signal conversion circuit and the telemetry system of the embodiment of the utility model are described in detail below in conjunction with the accompanying drawings.

[0038] On the one hand, if Figure 1 and Figure 2 As shown, the telemetry system signal conversion circuit according to the embodiment of the utility model includes: a circuit board 100, and a first RJ45 interface 200, a first conversion module, a first RS422 module 300, a main control module 400, a second RS422 module 500, a second conversion module and a second RJ45 interface 600 arranged on the circuit board 100; the first RJ45 interface 200 is arranged on one side of the circuit board 100, and the second RJ45 interface 600 is arranged on the other side of the circuit board 100; the first RJ45 interface 200 is electrically connected to one end of the first conversion module, and the other end of the first conversion module is electrically connected to one end of the first RS422 module 300. The first RS422 module 300 is electrically connected to one end of the main control module 400, the other end of the main control module 400 is electrically connected to one end of the second RS422 module 500, the other end of the second RS422 module 500 is electrically connected to one end of the second conversion module, and the other end of the second conversion module is electrically connected to the second RJ45 interface 600; the first conversion module is used to convert the single-ended signal of the first RJ45 interface 200 and the differential signal of the first RS422 module 300; the second conversion module is used to convert the single-ended signal of the second RJ45 interface 600 and the differential signal of the second RS422 module 500.

[0039] Specifically, Figure 2As shown, in this example, both the first conversion module and the second conversion module use conversion chips, such as signal conversion chips of models such as MAX3490 and MAX3491. These conversion chips allow data to be transmitted from the RJ45 interface to the RS422 bus, and can convert the single-ended signal of the RJ45 interface into the differential signal of RS422; at the same time, these chips have high-performance differential driving capabilities to ensure signal stability and transmission quality. On a single circuit board 100, two groups of RJ45 interfaces are included, namely the first RJ45 interface 200 and the second RJ45 interface 600. The two groups of RJ45 interfaces are located on the left and right sides of the circuit board 100, respectively. After completing the differential signal conversion, the two interfaces are interconnected in hardware, that is, any data from the RJ45 interface will be transmitted to the local while being transmitted to the next one, thereby realizing the function of the bus. The main control module 400 includes an MCU, which is responsible for the operating status of the entire circuit.

[0040] like Figure 2 As shown, in some embodiments of the utility model, the first RJ45 interface 200 and the second RJ45 interface 600 are both provided with a power pin (i.e., the 8th pin) and a ground pin (i.e., the 6th pin), the power pin is connected to the power supply, and the ground pin is connected to the ground. When the telemetry system signal conversion circuit is applied to the telemetry system, in order to ensure that the wireless access units on multiple buses can work normally, two wires are selected from the RJ45 interface as the power line and the ground line, and the wireless access units are connected front and back, so that they can work stably without the need for an external power adapter.

[0041] like Figure 3 As shown, in some embodiments of the utility model, the telemetry system signal conversion circuit also includes a TVS diode, one end of the TVS diode is electrically connected to the power pin, and the other end of the TVS diode is electrically connected to the ground pin. By using a TVS diode in the power supply part, it helps to protect the RJ45 interface from the influence of electrostatic discharge, and while supplying a stable power supply to the subsequent equipment, it protects the communication line from the adverse effects of electromagnetic interference and electrostatic discharge.

[0042] In some embodiments of the present invention, a first common mode inductor is provided between the first RJ45 interface 200 and the first conversion module; a second common mode inductor is provided between the second RJ45 interface 600 and the second conversion module. By connecting the common mode inductor at the RJ45 interface, the common mode interference signal can be greatly suppressed or reduced to maintain the quality and accuracy of the signal, while also protecting the device from damage caused by external electromagnetic interference.

[0043] In some embodiments of the present invention, the first RJ45 interface 200 and the second RJ45 interface 600 are both connected to an overvoltage protection module. By providing the overvoltage protection module, the first RJ45 interface 200 and the second RJ45 interface 600 are protected from overvoltage, and the RJ45 interface is protected from the impact of high energy discharge during operation. Figure 3 As shown, in this example, the overvoltage protection module includes a gas discharge tube, the model of which can be B3D090L, etc., to play the role of overvoltage protection.

[0044] On the other hand, the utility model proposes a telemetry system, such as Figure 4 As shown, the telemetry system includes a bus host and a plurality of wireless access units electrically connected in sequence, and both the bus host and the wireless access unit include the above-mentioned telemetry system signal conversion circuit. By adopting the telemetry system signal conversion circuit, the RJ45 interface is expanded to support RS422 bus communication to meet the high-speed and reliable data transmission requirements in the telemetry system, thereby improving the performance and communication capability of the telemetry system.

[0045] In some embodiments of the utility model, in order to expand the transmission distance of the telemetry system, the network cable connecting the RJ45 interface between the wireless access units and between the bus host and the wireless access unit adopts a Category 6a shielded network cable, which can better shield interference, provide higher transmission speed and longer transmission distance, and meet the long-distance wiring requirements in the telemetry system.

[0046] The telemetry system signal conversion circuit and the telemetry system according to the embodiment of the utility model have the following beneficial effects:

[0047] (1) RS422 communication requires the use of differential signals for transmission, while the RJ45 interface usually transmits single-ended signals. By using dedicated signal conversion chips, such as MAX3490 and MAX3491, single-ended signals can be converted into RS422 differential signals, allowing data to be transmitted from the RJ45 interface to the RS-422 bus and ensuring the stability and integrity of the signal.

[0048] (2) To improve the quality of communication signals, the RJ45 interface is connected with common-mode inductors and gas discharge tubes, which can significantly suppress or reduce common-mode interference signals to maintain signal quality and accuracy, while also protecting the device from damage by external electromagnetic interference and protecting the RJ45 interface from the impact of high-energy discharge during operation. In addition, TVS diodes are used in the power supply part to help protect the RJ45 interface from electrostatic discharge.

[0049] (3) In order to improve the stability and performance of communication, this technical solution takes into account a variety of factors, including signal quality, transmission distance, electromagnetic interference suppression, etc., which ensures that RS422 bus communication can work reliably under various conditions, whether in long-distance communication or in noisy environments. In order to improve signal quality and reduce electromagnetic interference, common-mode inductors are used in hardware to filter out common-mode interference generated in the circuit; in software, in conventional communication protocols, CRC checks and data compression check methods are added to reduce the length of communication data packets while further improving data reliability. In order to expand the transmission distance, the network cable connected to the RJ45 port uses a Category 6 shielded network cable. Compared with lower-level network cables, it can better shield interference, provide higher transmission speeds and longer transmission distances, and meet the long-distance wiring requirements in telemetry systems.

[0050] (4) To ensure that the wireless access units on multiple buses can work properly, two wires are selected from the RJ45 interface as the power line and the ground line to connect the wireless access units front and back so that they can work stably without the need for an external power adapter.

[0051] (5) Compared with traditional Ethernet communication, RS422 bus communication provides higher reliability and is particularly suitable for telemetry systems over long distances and in noisy environments. This improvement helps ensure the accuracy and stability of data transmission and reduces the risk of data loss. RS422 bus communication is more resistant to electromagnetic interference and noise and can work in complex electromagnetic environments, reducing the possibility of communication interruptions, which is critical for industrial telemetry and remote monitoring applications.

[0052] (6) By integrating RS422 communications into the RJ45 interface, it allows the use of existing RJ45 wiring and sockets without changing or replacing hardware infrastructure. This reduces the cost and complexity of system upgrades.

[0053] (7) It supports RS422 bus communication protocol, but also has protocol adaptation and compatibility functions so that it can work with existing Ethernet communication equipment and protocols, which enables the system to adapt to future technological evolution and expansion.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "further embodiments", "some specific embodiments" or "some examples" etc. means that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A telemetry system signal conversion circuit, characterized in that: include: Circuit boards; A first RJ45 interface is provided on one side of the circuit board; A first conversion module is arranged on the circuit board, and one end of the first conversion module is electrically connected to the first RJ45 interface; A first RS422 module is arranged on the circuit board, one end of the first RS422 module is electrically connected to the other end of the first conversion module; the first conversion module is used to convert the single-ended signal of the first RJ45 interface and the differential signal of the first RS422 module; A main control module is arranged on the circuit board, and one end of the main control module is electrically connected to the other end of the first RS422 module; A second RS422 module is arranged on the circuit board, and one end of the second RS422 module is electrically connected to the other end of the main control module; A second conversion module is arranged on the circuit board, and one end of the second conversion module is electrically connected to the other end of the second RS422 module; A second RJ45 interface is arranged on the other side of the circuit board, and the second RJ45 interface is electrically connected to the other end of the second conversion module; the second conversion module is used to convert the single-ended signal of the second RJ45 interface and the differential signal of the second RS422 module.

2. The telemetry system signal conversion circuit according to claim 1, characterized in that: The first RJ45 interface and the second RJ45 interface are both provided with a power pin and a ground pin, the power pin is connected to a power source, and the ground pin is grounded.

3. The telemetry system signal conversion circuit according to claim 2, characterized in that: The telemetry system signal conversion circuit also includes a TVS diode, one end of the TVS diode is electrically connected to the power pin, and the other end of the TVS diode is electrically connected to the ground pin.

4. The telemetry system signal conversion circuit according to claim 1, characterized in that: A first common-mode inductor is arranged between the first RJ45 interface and the first conversion module; and a second common-mode inductor is arranged between the second RJ45 interface and the second conversion module.

5. The telemetry system signal conversion circuit according to claim 1, characterized in that: The first RJ45 interface and the second RJ45 interface are both connected to an overvoltage protection module.

6. The telemetry system signal conversion circuit according to claim 5, characterized in that: The overvoltage protection module includes a gas discharge tube.

7. A telemetry system, characterized in that: It comprises a bus host and a plurality of wireless access units which are electrically connected in sequence, wherein the bus host and the wireless access units both comprise the telemetry system signal conversion circuit as claimed in any one of claims 1 to 6.

8. The telemetry system according to claim 7, characterized in that: The second RJ45 interface of the bus host is electrically connected to the first RJ45 interface of one of the wireless access units via a Category 6a shielded network cable, and multiple wireless access units are connected via Category 6a shielded network cables.

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