Concentrator circuit for converting single-path serial port into multi-path serial port for monitoring system
Through the combination of a serial port server and a general switch, the single-channel RS422 interface is expanded into a multiple-channel RS422 interface, which solves the problem of insufficient number of interfaces in the monitoring equipment, and realizes stable transmission and low-cost expansion of monitoring terminal signals.
Patent Information
- Application Number
- CN202422460579.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-11
AI Technical Summary
The number of RS422 interfaces in existing monitoring equipment is limited, which cannot meet the needs of more monitoring terminals. The existing solutions are costly, complex program debugging and long R&D cycle.
The combination of a serial port server and a general switch is adopted to expand the single RS422 interface into a multiple RS422 interface, and data transmission is realized through the combination of a serial port server and a general switch, meeting the interface needs of multiple monitoring terminals.
It realizes stable transmission of signal from monitoring terminals, reduces costs, and simplifies the development process, meeting more interface needs of monitoring terminals.
Smart Images
Figure CN223168337U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of monitoring devices, and particularly relates to a hub circuit for converting a single serial port into multiple serial ports in a monitoring system. Background Technique
[0002] The statements in this part only provide background technical information related to the utility model, and do not necessarily constitute prior art.
[0003] With the rapid development of the security industry in today's society, there are more and more monitoring terminals in monitoring devices, and the demand for the number of interfaces is also increasing. For example, in the security monitoring of factories, in order to achieve comprehensive security monitoring in real time and multi-directionally, etc., when using monitoring devices, it is necessary to control the rotation of the pan-tilt head, the zoom and focus of the camera, etc. at the same time, which requires more interfaces to access the monitoring terminals. At present, due to the excellent anti-interference performance of the RS422 interface, it is favored. Taking the RS422 interface as an example, the security monitoring of factories requires multiple RS422 interfaces to ensure the stable transmission of signals, while the RS422 interfaces on the device side are often limited, mostly only one or two groups of RS422 interfaces, so a circuit for converting a single RS422 interface into multiple RS422 serial ports is needed.
[0004] At present, most of the existing RS422 hub circuits use FPGA chips as the bottom layer for data processing, enabling monitoring devices to achieve higher processing speeds and lower latencies, thereby improving the usage efficiency of RS422 interfaces. However, this method has high costs, complex program debugging, a long R & D cycle, and when the monitoring terminals in the monitoring device work simultaneously, there is still a problem of limited interface quantity, that is, the number of RS422 interfaces cannot meet the needs of more monitoring terminals in the monitoring device. Content of the Utility Model
[0005] Aiming at the deficiencies of the existing technology, the utility model provides a hub circuit for converting a single serial port into multiple serial ports in a monitoring system. By combining a serial server and a general switch, the single interface is extended to multiple interfaces, overcoming the problem that the number of interfaces cannot meet the needs of more monitoring terminals in the monitoring device, ensuring the stable transmission of signals of each monitoring terminal, and having low costs, being simple and reliable.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] In the first aspect, a hub circuit for converting a single serial port into multiple serial ports is disclosed, including:
[0008] Multiple first serial servers, a general switch, and a second serial server;
[0009] Each of the first serial port servers is connected to the corresponding monitoring terminal, receives the data collected by the monitoring terminal, and transmits it to the general switch through the network;
[0010] The general switch exchanges the received data to the second serial port server;
[0011] The second serial port server transmits the exchanged data to the local host.
[0012] As a further technical solution, when there are four first serial port servers, they are respectively connected to a pan-tilt, a camera, a temperature and humidity sensor, and an inclination sensor.
[0013] As a further technical solution, the first serial port server communicates with the corresponding monitoring terminal in the RS422 mode.
[0014] As a further technical solution, the first serial port server is set to the client mode when working.
[0015] As a further technical solution, the first serial port server is transmitted to the general switch through the network, and the network is a wired network or a wireless network.
[0016] As a further technical solution, the general switch is a multi-port 100M or 1000M adaptive switch.
[0017] As a further technical solution, the second serial port server is set to the server mode when working.
[0018] As a further technical solution, the second serial port server communicates with the local host in the RS422 or RS232 or RS485 communication mode.
[0019] In a second aspect, a monitoring system is disclosed, including: a hub circuit for converting a single serial port to multiple serial ports, a local host, and a monitoring terminal. The input end of the hub circuit for converting a single serial port to multiple serial ports is connected to the monitoring terminal, and the output end is connected to the local host.
[0020] As a further technical solution, the monitoring terminal includes a pan-tilt, a camera, a temperature and humidity sensor, and an inclination sensor.
[0021] One or more technical solutions of the present utility model have the following beneficial effects:
[0022] In this embodiment, by combining an RS422 serial server and a multi-way switch, a single RS422 serial port is converted into multiple RS422 serial ports, overcoming the problem that the number of interfaces cannot meet the requirements of more monitoring terminals of the monitoring device. The number of RS422 interfaces can be selected according to the number of monitoring terminals in the monitoring device, ensuring the stable transmission of signals of each monitoring terminal, and having low cost, being simple and reliable.
[0023] Advantages of additional aspects of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.
[0025] Figure 1 It is a schematic circuit diagram of a hub for converting a single RS422 serial port into multiple RS422 serial ports in this embodiment;
[0026] Figure 2 It is a schematic diagram of factory safety monitoring containing a hub for converting a single serial port into multiple serial ports. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanations for the present utility model. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.
[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model.
[0029] In the case of no conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.
[0030] Embodiment 1
[0031] In the safety monitoring of a factory, in order to achieve comprehensive safety monitoring in real-time, multi-directional, etc., when using monitoring equipment, it is necessary to simultaneously control the rotation of the pan-tilt, the zoom and focus of the camera, and obtain the temperature in the current scene, etc. This requires accessing each monitoring terminal through more interfaces. However, the interfaces on the existing device side are often limited. Taking the RS422 interface as an example, most have only one or two groups of RS422 interfaces, which cannot meet the demand for the number of interfaces of more monitoring terminals in the monitoring equipment. In order to ensure low cost, short development cycle, and simple and reliable solution, a circuit that converts a single-channel RS422 interface into multiple-channel RS422 serial ports is required.
[0032] As Figure 1 , Figure 2 shown, this embodiment discloses a hub circuit for converting a single-channel serial port into multiple-channel serial ports, including:
[0033] Multiple first serial port servers, a general switch, and a second serial port server;
[0034] Each first serial port server is connected to the corresponding monitoring terminal, receives the data collected by the monitoring terminal, and transmits it to the general switch through the network;
[0035] The general switch exchanges the received data to the second serial port server;
[0036] The second serial port server transmits the exchanged data to the local host.
[0037] As Figure 1 , Figure 2 shown, in this embodiment, taking the conversion from a single-channel RS422 serial port to multiple-channel RS422 serial ports as an example, in the hub circuit, there are multiple first serial port servers. When there are four first serial port servers, they are respectively connected to the pan-tilt, the camera, the temperature and humidity sensor, and the tilt sensor. The first serial port server communicates with the corresponding monitoring terminal in the RS422 manner.
[0038] Specifically, in this embodiment, the RS422 serial port server adopts the ZLAN5143 I-422 model, which is specially designed for harsh environments such as lightning protection and electromagnetic interference resistance, and is applicable to scenarios such as monitoring, wind power generation, and field geological disaster monitoring.
[0039] The first serial port server is an RS422 serial port server. When communicating with the monitoring terminal, it uses the RS422 mode and is equipped with an RS422 interface. One general RS422 interface transmits signals through a two-wire line. Through the transmission line driver, the logic level is converted into a potential difference to complete the information transmission at the starting end. It sends and receives in a differential manner and does not require digital grounding. There are two pairs of twisted wires, where TXD- and TXD+ are used for sending, and RXD- and RXD+ are used for receiving, enabling full-duplex operation with the sending and receiving not affecting each other.
[0040] Among them, when the first serial port server communicates with multiple monitoring terminals, it can also use the RS232 or RS485 communication mode.
[0041] Such as Figure 1 、 Figure 2 As shown in the figure, in factory safety monitoring, four first serial port servers are respectively connected to the pan-tilt, camera, temperature and humidity sensor, and inclination sensor, and simultaneously obtain the pan-tilt rotation angle, the temperature and humidity collected by the temperature and humidity sensor, the zoom and focus value of the camera, and the inclination degree collected by the tilt angle sensor.
[0042] Among them, the number of the first serial port servers can be set according to the number of monitoring terminals to be accessed, so as to meet the requirements of the number of monitoring terminals for safety monitoring and ensure the stable transmission of data of each monitoring terminal.
[0043] Such as Figure 1 As shown in the figure, in this embodiment, the first serial port server is set to the client mode when working.
[0044] Each first serial port server is set to the client mode (i.e., the client mode) when working, ensuring that the RS422 data interface of the first serial port server can communicate one-to-one with the RS422 interface of the second serial port server, rather than communicating with the RS422 interfaces of other extension ends.
[0045] In order to meet the demand of more monitoring terminals of the monitoring device for the number of interfaces, by combining the general RS422 serial port server with the general multi-port switch, one RS422 interface is extended to multiple RS422 interfaces.
[0046] Specifically, as Figure 1 、 Figure 2 As shown in the figure, in this embodiment, the first serial port server is transmitted to the general switch through the network. The network is a wired network or a wireless network.
[0047] Each first serial port server transmits the data received from the corresponding monitoring terminal to the general switch through the wired network or the wireless network.
[0048] Among them, the general switch is a multi-port 100M or 1000M adaptive switch.
[0049] A multi-port 100Mbps or Gigabit self-adaptive switch can support multiple devices with different speed levels simultaneously. It can not only automatically adapt to the network speed of the connected devices but also ensure good performance and stability, making it suitable for scenarios where multiple speed devices need to be connected. When purchasing, the most suitable model can be determined according to actual needs (such as the number of required ports, whether special functions such as PoE power supply are needed, etc.).
[0050] Such as Figure 1 、 Figure 2 As shown, in this embodiment, the second serial port server is set to the server mode when working.
[0051] The second serial port server waits for communication connection with the first serial port server in the client mode through a general switch in the server mode (i.e., the server mode). After connection, transparent data transmission can be achieved, and the data of each first serial port server is completely forwarded to the second serial port server through the general switch.
[0052] The second serial port server transmits the data received from the general switch to the local host through a wired network or a wireless network.
[0053] Among them, when the second serial port server communicates with the local host, the RS422 or RS232 or RS485 communication mode can be adopted.
[0054] In this embodiment, the second serial port server is set to the server mode (i.e., the server mode) when working, communicates with the general switch through a wired network or a wireless network, the general switch communicates with multiple first serial port servers in the client mode through a wired network or a wireless network at the same time, and the multiple first serial port servers are respectively connected to the corresponding monitoring terminals, and different monitoring terminals collect different data.
[0055] Through the combination of the above serial port server and the general switch, a single-channel serial port to multi-channel serial port hub circuit is formed, expanding one RS422 interface into multiple RS422 interfaces, realizing the simultaneous access of multiple monitoring terminals of the monitoring device, overcoming the problem of being unable to meet the demand of the monitoring device for more monitoring terminals, and at the same time enabling multiple monitoring terminals in the monitoring device to work simultaneously, ensuring the stable transmission of signals of each monitoring terminal.
[0056] In this embodiment, the monitoring terminals of the monitoring device not only include visible light cameras or infrared cameras, but often there are also multiple monitoring terminals such as pan-tilt heads, temperature and humidity sensors, inclinometers, and loudspeakers at the same time. When multiple monitoring terminal functions need to be realized simultaneously in the monitoring device, which monitoring terminals are connected to the first serial port server one-to-one.
[0057] Specifically, in a monitoring system, there are not only visible light cameras or infrared cameras, but also multiple monitoring terminals such as pan-tilt heads, temperature and humidity sensors, inclinometers, and loudspeakers. However, the overall interfaces of the devices are often limited. In most cases, there is only one serial port available for access, which cannot meet the simultaneous operation of multiple monitoring terminals, that is, the functions of multiple monitoring terminals cannot be realized simultaneously. Moreover, the RS422 serial port does not have a bus function and cannot achieve the cascading effect. At this time, a device that converts one serial port into multiple serial ports is needed for serial port conversion. By connecting a hub circuit that converts one serial port into multiple serial ports to the monitoring device, it is possible to convert one RS422 serial port into multiple RS422 serial ports through a serial server-switch-serial server conversion. According to the access quantity requirements of the monitoring terminals, one RS422 serial port is converted into multiple RS422 serial ports and connected to monitoring terminals such as pan-tilt heads, temperature and humidity sensors, and inclinometers respectively.
[0058] As Figure 2 shown, in factory safety monitoring, when using monitoring devices, it is necessary to control the rotation of the pan-tilt head, the zoom and focus of the camera, and obtain the temperature and humidity in the current scene simultaneously. At this time, a serial port converter that converts one port into multiple ports is required to simultaneously obtain data such as the rotation angle of the pan-tilt head, temperature and humidity, the zoom and focus value of the camera, and the inclination degree of the current device.
[0059] In the monitoring system, the single-to-multiple RS422 serial port hub circuit in this embodiment is connected. The four first serial servers in the hub circuit are set to the client mode and are respectively connected to the pan-tilt head, camera, temperature and humidity sensor, and inclination sensor, enabling the pan-tilt head, camera, temperature and humidity sensor, and inclination sensor to work simultaneously. The first serial servers can simultaneously obtain data such as the rotation angle of the pan-tilt head, the zoom and focus value of the camera, the temperature and humidity collected by the temperature and humidity sensor, and the inclination degree of the device collected by the inclination angle sensor. The four first serial servers transmit the obtained data to the general switch through a wired network or a wireless network. The general switch forwards the received data to the second serial server in the server mode through a wired network or a wireless network. The second serial server transmits the received data to the local host through a USB-to-RS422 converter, enabling the local host to simultaneously obtain data such as the rotation angle of the pan-tilt head, the zoom and focus value of the camera, the temperature and humidity of the factory, and the inclination degree. It can also make on-site adjustments according to the obtained data to meet the safe and comprehensive monitoring of the factory. This greatly increases the quantity and length of the wiring, improves the stability of data transmission at the same time, and further improves the monitoring safety accuracy of the factory.
[0060] Through the above-mentioned hub circuit for converting a single-channel serial port to multiple-channel serial ports, the number of RS422 interfaces is increased, enabling the simultaneous connection of required monitoring terminals and realizing the functions of multiple monitoring terminals. It converts a single-channel RS422 serial port into multiple-channel RS422 serial ports, overcoming the problem that the number of interfaces cannot meet the needs of more monitoring terminals for monitoring devices. The number of RS422 serial port servers can be selected according to the number of monitoring terminals, ensuring the stable transmission of signals of each monitoring terminal, with low cost, simplicity and reliability.
[0061] Embodiment 2
[0062] This embodiment provides a monitoring system, including: a hub circuit for converting a single-channel serial port to multiple-channel serial ports, a local host and monitoring terminals. The input end of the hub circuit for converting a single-channel serial port to multiple-channel serial ports is connected to the monitoring terminals, and the output end is connected to the local host. The monitoring terminals include a pan-tilt head, a camera, a temperature and humidity sensor, and an inclination sensor.
[0063] Among them, the hub circuit for converting a single-channel serial port to multiple-channel serial ports adopts the hub circuit for converting a single-channel serial port to multiple-channel serial ports in Embodiment 1.
[0064] The detailed steps are the same as those of the hub circuit for converting a single-channel serial port to multiple-channel serial ports provided in Embodiment 1, and will not be elaborated here.
[0065] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A hub circuit for converting a single serial port to multiple serial ports, characterized in that Including: Multiple first serial port servers, a general switch, and a second serial port server; Each of the first serial port servers is connected to the corresponding monitoring terminal, receives the data collected by the monitoring terminal, and transmits it to the general switch through the network; The general switch exchanges the received data to the second serial port server; The second serial port server transmits the exchanged data to the local host.
2. The hub circuit for converting a single serial port to multiple serial ports according to claim 1, wherein, When there are four first serial port servers, they are respectively connected to a pan-tilt, a camera, a temperature and humidity sensor, and an inclination sensor.
3. The hub circuit for converting a single serial port to multiple serial ports according to claim 1, characterized in that, The first serial port server communicates with the corresponding monitoring terminal in the RS422 mode.
4. The hub circuit for converting a single serial port to multiple serial ports according to claim 1, wherein When the first serial port server works, it is set to the client mode.
5. The hub circuit for converting a single serial port to multiple serial ports according to claim 1, wherein The first serial port server is transmitted to the general switch through the network, and the network is a wired network or a wireless network.
6. The hub circuit for converting a single serial port to multiple serial ports according to claim 1, wherein, The general switch is a multi-port 100M or 1000M adaptive switch.
7. The hub circuit for converting a single serial port to multiple serial ports according to claim 1, characterized in that, When the second serial port server works, it is set to the server mode.
8. The hub circuit for converting a single serial port to multiple serial ports according to claim 1, characterized in that, When the second serial port server communicates with the local host, it uses the RS422 or RS232 or RS485 communication mode.
9. Monitoring system, characterized in that, Including the single-channel serial port to multi-channel serial port hub circuit, local host, and monitoring terminal according to any one of claims 1-8, the input end of the single-channel serial port to multi-channel serial port hub circuit is connected to the monitoring terminal, and the output end is connected to the local host.
10. The monitoring system according to claim 9, characterized in that, The monitoring terminal includes a pan-tilt, a camera, a temperature and humidity sensor, and an inclination sensor.