With the rapid development of science and technology, capacitive touch screen has been widely used in many fields because of its sensitive touch response, clear display effect and convenient operation. In the field of industrial automation and precision control, capacitive touch screen has shown its unique advantages, especially in the application of vacuum controller, it has brought unprecedented convenience and efficiency for equipment operation and monitoring.
First, the basic principle of capacitive touch screen
The working principle of the capacitive touch screen is mainly to coat a transparent thin film conductor layer on the glass screen, and then add a protective glass outside the conductor layer to form a double glass design. When the finger is touched on the metal layer, the capacitance of the contact changes, leading to a change in the frequency of the oscillator connected to it. By measuring this frequency change, the touch position can be determined and the relevant information obtained. The capacitive touch screen supports multi-touch, that is, the four sides of the touch screen are coated with narrow electrodes to form a low voltage AC electric field. When the finger touches the screen, due to the action of the electric field of the human body, a coupling capacitance will be formed between the finger and the conductor layer, and the current will flow to the contact. By calculating the proportion and strength of the current, the position of the touch point can be accurately calculated.
Two, the advantages of capacitive touch screen
High sensitivity and multi-touch: Capacitive touch screen has high sensitivity, can quickly respond to the touch action of the finger, and support multi-touch, so that users can perform multiple operations at the same time, improve operation efficiency.
Clear display effect: capacitive touch screen is usually made of high-quality glass, with high light transmittance and clarity, making the display content more vivid and realistic.
Convenient operation: the capacitive touch screen can be operated by finger touch, without the use of external equipment such as mouse or keyboard, and the operation is more convenient and intuitive.
Durability: The double glass design of the capacitive touch screen can effectively protect the conductor layer and the sensor, prevent external factors such as dirt, dust or oil stains from affecting the touch screen, and prolong the service life.
Three, the basic principle and application of vacuum controller
Vacuum controller is a kind of equipment used to control the pressure of vacuum system, which is widely used in semiconductor manufacturing, material research, vacuum heat treatment and other fields. Its working principle is to adjust the pressure in the system by controlling the pumping speed of the vacuum pump to meet the needs of different technological processes. In the control system of vacuum furnace and other equipment, the vacuum controller plays a crucial role. It can monitor and adjust the vacuum degree in the furnace in real time to ensure the stability and controllability of the process.
Fourth, the application of capacitive touch screen in vacuum controller
Intuitive operation interface: In the design of the vacuum controller, the capacitive touch screen is used as the human-machine interaction interface, which can make the operation more intuitive and convenient. Users can directly set the target vacuum value, heating time, temperature value and other parameters on the touch screen, and real-time monitoring of the vacuum furnace parameters, such as vacuum, heater actual current, voltage and vacuum sealing ring cooling cycle water flow, etc.
High-precision stability control: Capacitive touch screen combined with programmable logic controller (PLC) can achieve high-precision stability control. After setting the parameters through the touch screen, the PLC will automatically adjust the pumping speed of the vacuum pump according to the set value, monitor and adjust the various parameters in the furnace to ensure the stability and controllability of the process. At the same time, the system also has the function of breaking the couple and over-temperature limit alarm, which can send an alarm in time under abnormal circumstances to ensure the safety of equipment and personnel.
Improve operation efficiency and accuracy: the traditional vacuum controller usually uses physical operation methods such as buttons or knobs, which is cumbersome and error-prone. With the capacitive touch screen, the user can operate directly on the touch screen without frequently switching the operation interface or keys, which greatly improves the operation efficiency and accuracy.
Adapt to complex process requirements: In the control process of vacuum furnace and other equipment, it is often necessary to frequently adjust the process parameters to adapt to different process requirements. The flexibility and convenience of the capacitive touch screen allows the user to adjust the parameters at any time according to the actual situation, without stopping or restarting the device, thus improving the utilization and production efficiency of the device.
In summary, the application of capacitive touch screen in vacuum controller brings unprecedented convenience and efficiency for equipment operation and monitoring. Its high sensitivity, multi-touch, clear display effect and convenient operation make it more convenient for users to control the operating parameters of vacuum furnace and other equipment, and improve the stability and controllability of the process. At the same time, the combination of capacitive touch screen and PLC equipment also realizes the stability control of high precision, and further improves the production efficiency and safety of the equipment. With the continuous progress of science and technology and the continuous expansion of application fields, it is believed that the application of capacitive touch screen in vacuum controller will be more extensive and in-depth.