PBA800 Process protection measurement and monitoring system

User free development, no communication related programming required, plug and play
Built in PPP/TCP/UDP/IP protocol for optimizing networks for industrial applications
Robust core system, uniquely designed anti false death function, achieving true unmanned operation
Extremely compact size, highly integrated
Provide complete development support and complete configuration tool support
It has more and more powerful functions than ordinary DTUs.

User free development, no communication related programming required, plug and play
Built in PPP/TCP/UDP/IP protocol for optimizing networks for industrial applications
Robust core system, uniquely designed anti false death function, achieving true unmanned operation
Extremely compact size, highly integrated
Provide complete development support and complete configuration tool support
It has more and more powerful functions than ordinary DTUs. According to the description of the working principle, the WEB server is located at the core of the entire system, and several difficulties need to be solved include:
1. Security. Only authorized login users can perform system configuration (network parameters, video features, etc.). Ordinary users can only perform simple monitoring.
2. Flow control. The video data is continuous and large, and the server should have the ability to coordinate various monitoring data.
3. Real time performance. For the response speed of web request instructions on the monitoring end, especially under high loads.
4. Performance. The response speed of the system in the presence of multiple monitoring requests simultaneously.
5. Supports serial port commands. The pan tilt control command requires serial port support.
6. Database interaction. Including user databases, system configuration parameters, etc., all need to be saved offline.
Under uCLinux, there are mainly three web servers: Httpd, Thttpds, and BOA. Httpd is the simplest web server, with the weakest functionality and does not support authentication or CGI (Common Gateway Interface). Both Thttpds and BOA support authentication, CGI, and more, with comprehensive features. BOA has open source code, reliable performance, and good stability, but it is a single task web server. So, we choose Thttpds that are simple, compact, easy to transplant, fast, and secure.
By default, Thttpds only run in normal user mode, effectively preventing unauthorized access to system resources and data. At the same time, Thttpds fully supports HTTP basic authentication (RFC2617), which can effectively solve security issues.
In addition, Thttpds do not use fork() to generate child processes for concurrent requests, but instead use multiplexing technology to achieve high efficiency and effectively improve system performance.
Finally, the URL based file traffic restriction in Thttpds is very convenient for continuous video traffic control. For example, Apache must use plugins to implement it, which is less efficient than Thttpds. There is a benchmark comparison chart with other web servers on the official website of Thttpd.
In summary, Thttpds effectively meet the system’s needs in terms of security, performance, flow control, and of course, real-time performance is also well guaranteed. Next, combined with the source code, we will first implement the basic functions of Thttpd. Then, we will improve the implementation of video data forwarding, security, support for serial commands, and database interaction.

 PBA800 Process protection measurement and monitoring system

Industrial embedded communication computer: Linux, 1 WAN, 4 LAN, VPN, 4 Serial
——Equipped with Intel IXP435 400MHz network processor to improve routing and VPN performance
——Supports comprehensive 3-layer routing protocols: OSPF, RIP, DVMRP, IPv6
——Comprehensive network management functions including QoS and VLAN
——4-port serial server (DB37 connector), supporting TCP server/client and paired TCP mode
——Embedded Linux systems are easy to maintain
——Supports DC 12-48V power input
——Durable industrial grade fanless structure design, resistant to vibration and impact, supporting working temperatures of -40~80 ℃
summary
The Korenix JetBox 5432 is an embedded 3-layer routing computer with optimized Linux processing capabilities. The serial port can connect and remotely manage security control devices, such as card readers, cameras, speakers, etc., making it suitable for front-end industrial control applications. The JetBox 5432 is also equipped with a rich interface, including Ethernet ports, fieldbus, serial control ports, and USB ports. This routing computer can act as a gateway to connect different network groups and manage various peripherals of the front-end site through Linux programs. The JetBox 5432 is designed with an aluminum alloy casing without a fan, meeting the IP-31 industrial protection level, resistant to vibration and impact, and supporting a wide operating temperature range of -40~80 ℃. This ensures the high performance and reliability of large networks, and can serve industrial vertical markets such as transportation, public utilities, substations, or other high-risk environments.

Contact information:+86 15359213550

1. A-B Rockwell
2. FOXBORO
3. TRNEX
4. OVATION Westinghouse
5. SCHNEIDER
6. GE FANUC Fanuc
7. SIEMENS
8. REXROTH INDRAMA
9. ABB
10. HONEYWELL
11. BENTLY NEVADA
12. YOKOGAWA Yokogawa
13. ICS TRIPLEX
14. BACHMANN
15. Emerson
16. EPRO
17. HIMA Black Horse and other imported industrial components!

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