What factors should be considered in the development of electronic product solutions?

Industrial computer is mainly used for industrial process measurement, control, data acquisition and other work. The development of IPC should be combined with the characteristics of IPC and consider the following factors:

1. Reliability

Industrial computer is usually used to control the uninterrupted production process. It is not allowed to shut down for maintenance during operation. Once a failure occurs, it will lead to quality accidents, even production accidents. Therefore, industrial control machines and tools are required to have high reliability, that is to say, there should be many measures to improve safety and reliability, so as to ensure that the average time between failures (MTBF) can reach tens of thousands of hours, and at the same time, shorten the fault repair time (MTTR) as far as possible, so as to achieve high operation efficiency.

2. Real time

Industrial control computer can control and monitor the production process in real time, so it is required to respond to the changes of various parameters of the control object in real time. In case of deviation or failure of process parameters, the industrial control function can respond in time and give an alarm and deal with it in real time. For this reason, industrial computer needs to be equipped with real-time multi task operating system (rtdos).

3. Adaptability

The environment of industrial field is bad, the electromagnetic interference is serious, and the power supply system is often disturbed by the start-up and stop of equipment with large fluctuation load. The grounding system is complex, and the common mode and series mode interference is large. Therefore, industrial control machines and tools are required to have a strong ability to adapt to the environment, such as high requirements for the range of temperature / humidity changes; the ability to prevent dust, corrosion, vibration and impact; good electromagnetic compatibility, high anti-interference ability and high common mode suppression ability.

4. I / O matching

Industrial control computer should have a variety of process input and output templates, such as analog, switching, pulse, frequency and other input and output templates. It has a variety of signal conditioning functions, such as isolated and non isolated signal conditioning; various thermocouple, thermal resistance signal input conditioning; voltage (V) and current (MA) signal input and output signal conditioning, etc.

5. System expansibility

With the improvement of factory automation level, the control scale is also expanding, so the industrial computer is required to have flexible expansibility.

6. System openness

The industrial computer is required to have an open architecture, that is to say, the open principle should be observed in host interface, network communication, software compatibility and upgrade, so as to facilitate system expansion, connection of different types of computers, and software portability and interchangeability.

7. Function of control software package

The industrial control software package shall have the functions of convenient human-computer interaction, rich pictures, good real-time performance, system configuration and system generation, real-time and historical trend recording and display, real-time alarm and accident recall, etc. Besides the conventional PID (proportional, integral, differential) control algorithm, there should also be some advanced control algorithms, such as fuzzy control, neural network, optimization, self-adaptive, self-tuning algorithm, and online self diagnosis function. At present, continuous control function is often combined with intermittent control function in control software package.

8. System communication function

It has the function of serial communication and network communication. Because of the high real-time requirements, the industrial computer communication network is required to be high-speed, and meet the international standard communication protocols, such as IEEE802.4, IEEE802.3 and so on. With the powerful communication function, IPC can form a larger control system, such as DCS distributed control system, CIMS computer integrated manufacturing system, etc.

9. Backup measures

Including power supply backup, memory information protection, manual / automatic operation backup, emergency switching device, etc.

10. Redundancy

In the occasions with higher reliability requirements, industrial control computer requires dual computer operation and redundant system, including dual control station, dual operation station, dual network communication, dual power supply system, dual power supply, etc., with dual computer switching function, dual computer monitoring software, etc., to ensure the long-term uninterrupted operation of the system.