Human-Machine Interface Touch Screens: Seamless Tech Integration in Daily Life

Human Machine Interface Touch Screen is a medium for interaction and information exchange, which realizes the conversion between the internal form of information and the form acceptable to humans.

Definition and properties
 

Definition: HMI is the abbreviation of Human Machine Interface, which is called human-machine interface or human-machine interface in Chinese. It is a medium for interaction and information exchange between the system and the user. Among them, the touch screen, as an input device, is an important part of HMI.

Properties: The touch screen realizes direct interaction between people and machines through touch operation, making the operation more intuitive and convenient.

Composition and structure
 

Hardware part: including processor (such as ARM, X86, etc.), display unit (such as LCD display), input unit (such as touch screen, keyboard, mouse, etc.), communication interface (such as RS232, RS485, CAN, network port, etc.) and data storage unit. The performance of the processor determines the performance of the HMI product and is the core unit of the HMI. The most important one is the human machine interface control module. The HMI control module is the center of the entire HMI system. It is responsible for processing input instructions from the touch screen and communicating with the control system inside the machine to realize data transmission and processing. This module integrates key components such as advanced microprocessors, communication interfaces, and data storage units, providing the HMI system with powerful computing power and flexible data processing capabilities.

Software part: Generally divided into system software running in HMI hardware and screen configuration software running under the PC Windows operating system. Users need to use the screen configuration software to create a "project file" first, and then download the compiled "project file" to the HMI processor through the serial communication port of the PC and HMI product for operation.

Basic functions and features
 

• Real-time data trend display: The captured data is immediately displayed on the screen.

• Automatic data recording: Automatically store the data in the database for later viewing.

• Historical data trend display: Visually present the data in the database.

• Report generation and printing: Convert the data into a report format and print it out.

• Graphic interface control: The operator can directly control the machine and other devices through the graphical interface.

Alarm generation and recording: Define the conditions for alarm generation, such as excessive temperature or pressure exceeding the critical value, the system will generate an alarm and notify the operator to handle it.
Diversified interface capabilities: In addition to the traditional serial communication interface, it also has data interfaces such as network port, parallel port, USB port, etc., which can be connected to a variety of industrial control equipment.

Application scenarios

HMI touch screens are widely used in industrial automation, intelligent manufacturing, smart home, medical equipment, transportation and other fields. In the industrial field, HMI touch screens, as the main interface for human-machine interaction, realize real-time monitoring, parameter setting, fault diagnosis and other functions of machine equipment, and improve production efficiency and safety.

Development trend

With the rapid development of Industry 4.0 and intelligent manufacturing, HMI touch screens will develop in a more intelligent, networked and integrated direction. The future HMI touch screen will have higher resolution, faster response speed, richer interaction methods and stronger data processing capabilities, providing users with a more convenient, efficient and safe operation experience. As an important medium for human-machine interaction, Human Machine Interface Touch Screen is increasingly widely used in modern society, and its development trend has also attracted much attention.