Human-machine Interface Module Research Articles

基于 IoT 的便携式养殖水质监测系统的开发与评估

In this paper, the development of a portable, multifunctional water quality monitoring system for aquaculture that is based on IoT technology is presented. The system integrates a main control module, sensor module, Human Machine Interface (HMI) module, Wi-Fi module and power module, and is equipped with system software based on Real Time Operating System (RTOS) for scheduling tasks. The main control module collects crucial water quality information, including water temperature (WT), dissolved oxygen (DO), ammonia nitrogen (NH3-N), and pH, through the sensor module and facilitates data interaction with the HMI module. The proposed aquaculture water quality evaluation model utilizes water quality parameters as input to assign a grade based on the evaluation result. These parameters are transmitted wirelessly to the OneNet cloud platform using Wi-Fi modules, enabling users to remotely monitor the water quality through a visual interface. The system structure has been meticulously designed to accommodate both portable and fixed-point remote monitoring applications. The experimental results demonstrate that the system is accurate, stable, and cost-effective, providing a reliable and efficient solution for intelligent aquaculture in small and medium-sized enterprises.

Energy management system for microgrids using weighted salp swarm algorithm and hybrid forecasting approach

The concept of a microgrid (MG) has been introduced to integrate the conventional generators, different renewable energy resources and energy storage systems (ESS) to meet the specific load demand. However, the intermittent nature of renewable energy resources produces a variable output, which drives an imbalance between power generation and demand in MG. The ESS is utilized to makes a balance between power generation and demand. When several renewable energy resources and ESS are available in MG as energy resources, then an energy management system (EMS) is required that can handle the stochastic nature of renewable energy resources, schedule the power of renewable energy resources and ESS for managing the power flow among MG resources and main grid while ensuing cost-effective operation. Therefore, this paper proposed an optimum EMS that aims to minimize the overall operating cost of grid-connected MG along with the short-term forecasting of PV power and load demand. The proposed EMS consists of four modules: forecasting, scheduling, data acquisition (DAQ), and human–machine interface (HMI) modules. An improved hybrid forecasting approach that combines a 3-level stationary wavelet transform (SWT) and grey wolf optimization-based least-square support vector machine (GWO-LSSVM) is proposed in the forecasting module to achieve day-ahead forecasting of PV power and load demand. In the scheduling module, the weighted salp swarm algorithm-based scheduling is applied to achieve the optimum power flow of grid-connected MG. Then, the DAQ and HMI module is used to monitor, analyze, and modified the input variables of the forecasting and scheduling module. The MATLAB/Simulink environment is then used to simulate the proposed EMS for grid-connected MG. Finally, numerical results demonstrate the efficiency of the proposed EMS for grid-connected MG with commercial load demand over the existing competitive approaches.

A practical augmented reality-assisted maintenance system framework for adaptive user support

Abstract This paper describes an Augmented Reality Maintenance System (ARMS) that can provide adaptive support and feedback to a user during maintenance. An innovative wrist-based haptic tracking methodology is implemented to provide maintenance step awareness to the maintenance operator when he/she is working within the maintenance workspace. This is integrated with an image-based step detection module to facilitate the determination on whether a step has been conducted correctly. To further adapt to the user's visualisation requirements during maintenance, a novel adaptive human-machine interface module has been incorporated. The result is a seamless AR-assisted maintenance platform that can better cater to the needs of the operators during maintenance by providing useful feedback to the operators. The system has been demonstrated through a case study to highlight the viability of the methodology in actual industrial scenarios.

An energy efficient neonatal incubator: mathematical modeling and prototyping

In this paper, we design and implement a low-cost automatic neonatal incubator equipped with a baby weight monitor in order to remedy the difficulties encountered with the maintenance of incubators in developing countries. Indeed, severe temperature fluctuations inside an incubator can lead to neonate heat loss, hypothermia and apnoea, which are closely related to temperature and air flow. The implemented device has been developed by interconnecting three modules. The first is the acquisition module that senses the temperature and humidity, the second is the control module in charge of monitoring and controlling the operation of the system and the third is the human machine interface module through which a user can set operating parameters of the system. The mathematical modeling of Proportional-Integral-Derivative (PID) controller and heat transfer allowed the minimization of heat loss across the wall of the enclosure. The incubator has been tested and the target temperature of 37 °C was reached after almost 15 min. Results from numerical simulation performed with the same condition of the test showed a good agreement between the simulation results and experimental results.

Application of Modbus Protocol in the Automatic Safety Device

The traditional HMI ( human-machine interface ) of automatic safety device is lack of beauty and friendship. With the development of smart grid, there are more and more high requirements of the HMI. The automatic safety device was divided into the HMI module and the device main body. An industrial touch screen which supports for Modbus protocol, was selected as the HMI module of the automatic safety device. The HMI data was extracted into the standard data of Modbus protocol, and mapped to the unified address space of Modbus protocol. Modbus RTU mode was used to achieve the data communication between the HMI module and the device main body. This method not only makes the display content richer, interface more user-friendly, but also makes the product development cycle shorter and the product more scalable.

AN EMBEDDED FINGER VEIN RECOGNITION SYSTEM

In this paper, an embedded finger-vein recognition system (FVRS) for authentication on ATM network is proposed. The system is implemented on an embedded platform and equipped wi th a novel finger-vein recognition algorithm. The p roposed system consists of four hardware modules: radio frequency identificati on system, image acquisition module, embedded main board, and human machine communication module. RFID module will start the ve ry initial communication between the user and the d evice. The finger-vein images of the user are acquired by the image acquis ition module of the hardware. The finger-vein recog nition algorithm is coded and targeted as firmware of the embedded main board. Hu man machine interface module communicates with the user through keyboard and displays the outcome of the match in human reco gnizable formats like LCD or LED displays as well a s voice message. The RFID module enhances the security and credibility of the whole system by giving short message service (SMS) through GSM technology platform to the actual user.

Design of Automatic Programming Controller Based on Milling Feature

An automatic programming controller system based on the milling processing feature was proposed in this paper. Firstly, through the analysis of milling feature and the relationship of that, a part milling machining feature model is established. Secondly, on this basis, the article introduced the XML files technology into the automatic programming system and designed structure of XML files for storing parts process and shape feature information. At last, this paper sets up the automatic programming controller system composed of the human-machine interface module; XML files access module and NC program algorithm module. The advantage of the controller is easy to maintain and upgrade and there is a certain practicality in machining.

Development of a canopy Solar-induced chlorophyll fluorescence measurement instrument

A portable solar-induced chlorophyll fluorescence detecting instrument based on Fraunhofer line principle was designed and tested. The instrument has a valid survey area of 1.3 × 1.3 meter when the height was fixed to 1.3 meter. The instrument uses sunlight as its light source. The instrument is quipped with two sets of special photoelectrical detectors with the centre wavelength at 760 nm and 771 nm respectively and bandwidth less than 1nm. Both sets of detectors are composed of an upper detector which are used for detecting incidence sunlight and a bottom detector which are used for detecting reflex light from the canopy of crop. This instrument includes photoelectric detector module, signal process module, A/D convert module, the data storage and upload module and human-machine interface module. The microprocessor calculates solar-induced fluorescence value based on the A/D values get from detectors. And the value can be displayed on the instrument's LCD, stored in the flash memory of instrument and can also be uploaded to PC through the PC's serial interface. The prototype was tested in the crop field and the results demonstrate that the instrument can measure the solar-induced chlorophyll value exactly with the correlation coefficients was 0.9 compared to the values got from Analytical Spectral Devices FieldSpec Pro spectrometer. This instrument can diagnose the plant growth status by the acquired spectral response.

Research and Development of Automatic Control System on Material Split Packing and Packaging Integrated Machine

In order to meet the high speed, high precision, high reliability of the packaging machine, a novel control system is provided. In the hardware, the main circuits consisted of main processor module, memory module, temperature measurement and control module, input signal detection module, material split packing module, output driver module, human-machine interface module, system monitor module, power module and JTAG debug module, etc. In the software, the multi-tasking operating system μC/OS-Ⅱ and the graphical user interface μC/GUI were successfully transplanted into LPC2478. Then an experimental platform was established. And many control tasks, including automatic measurement, making bags, loading, transferring, pumping vacuum, sealing and data display, were automatically and continuously executed on the platform. Finally the results show: the machine can package 30 packets (5 g per packet) in a minute; the packaging errors ≤ 0.2 g; the packaging qualified rates ≥ 93%. In conclusion, the system performance is good.

光伏控制逆变一体机的人机接口模块设计

光伏控制逆变一体机的人机接口模块设计

Research and Implement of Automated Eliminating Bubbles Method Oriented to Vacuum Casting

This paper proposed a new method of automated eliminating bubbles based on vision sense technology because detection and elimination of bubbles of injection materials is key factor which influences the quality of products and hinders realization of full automatic control for the vacuum casting. This method uses vision sensor to replace artificial visual measurement, and adopts processing of the bubbles images to judge the effect of eliminating bubbles instead of experiences of operators. This paper developed a bubbles monitoring control system to realize the automated eliminating bubbles method. The system adopts two-level distributed structure which is consisted of host and slave computers. The slave computer is composed of image acquisition module, controller module and execution module. It is responsible for controlling operation devices to finish vacuum casting. The host computer is responsible for supervisory control which includes human-machine interface module, camera control module and images analysis and processing module. The function of every module is described in detail. The operator is just needed to set relative parameters, and then the system will implement automatically. In a word, the controlling system based on this new method possesses some advantages such as high precision, efficiency and flexibility.