Remote Wireless Research Articles

Design of Dual Motor Driven Agricultural Chassis and Ridge Following Control System

Currently, in the field of transplanting and sowing, the chassis is required to have basic characteristics such as compact structure, small overall weight, good field passing ability, and adaptability. However, there is still no universal chassis available in the market for walking with ridges. Therefore, designing a universal chassis with electric drive, remote operation/automatic ridge following automatic switching can meet the actual working needs of the above-mentioned machines. The electric drive chassis control system includes: Zed2 camera, PLC main control unit, brushless DC motor, brushless DC motor driver, wireless remote control system, optocoupler isolation module, voltage conversion module, etc. During manual control, the eight way remote control controller receives control signals from the remote control and manipulates the PLC for forward, backward, turning, and speed adjustment; During automatic control, the deviation distance between the ridge navigation line and the chassis obtained by the Zed2 camera is used to control the PLC for forward and reverse movement to follow the ridge.

Eco-friendly functional cellulose paper as a fire alarming via wireless warning transmission for indoor fireproofing

Herein, a strategy for fabricating wallpaper-based smart fire-warning systems to monitor and mitigate indoor fires is proposed. The fire-warning system, based on eco-friendly cellulose paper (CP), is produced via a simple dip-coating technique and provides flexibility, rapid low-temperature warning, and novel local and remote wireless signal conversion capability. Specifically, this fire-warning system can balance flexibility and flame retardancy, reducing the negative impact on the mechanical properties after adding flame retardants. Furthermore, the proposed fire-warning system meets the critical requirement of a fast low-temperature warning, showing warning messages within 2 s under 250 ºC, decreasing the response temperature below the combustion temperature of common materials (＞300 ºC). Moreover, the luminosity and temperature data collected can be sent to local and remote computers by wireless conversion. This work gives insight into the new generation of low-temperature smart fire-warning systems, including the contribution of wireless warning signal transmission to achieve smart and efficient fire detection.

Structure Design and Performance Analysis of Insulator Replacement Device Based on Live Working in A Distribution Network

In order to solve the problems of high risk and low automation of manual insulator replacement, a live working insulator replacement device is developed. Firstly, according to the shape parameters of insulators, the mechanical structure is composed of a positioning mechanism, a limiting mechanism, a clamping mechanism, and a driving mechanism. Secondly, the control system of the device is designed, and the mechanism is controlled by wireless remote control. Thirdly, the static simulation analysis of the clamping mechanism is carried out by using the finite element analysis software ANSYS Workbench. The simulation results show that the maximum elastic deformation is 0.14366mm, the stress distribution is relatively uniform, and the strain is small, meeting the structural design requirements. Finally, the motion control function test and insulation performance test of the device are carried out. The results show that the designed device has good insulation performance. It meets the needs of daily maintenance and emergency repair of distribution networks below 10kV and has high promotion and application value.

Light-driven soft climbing robot based on negative pressure adsorption

Many organisms rely on a dynamic attachment mechanism to climb surfaces. Inspired by these organisms, researchers have developed soft climbing robots. Despite their rapid development in recent times, such robots have restricted application in complex environments, such as the lack of remote wireless actuation and attachment ability for climbing tilted or slippery surfaces. To address these issues, we report alight-driven dynamic adsorption/desorption soft suction cup inspired by rock-climbing fish (Beaufortia kweichowensis). Our suction cups utilize the volumetric change caused by changes in the gas–liquid phase in the inner chamber to generate suction and thrust. The repetitive changes in the gas–liquid phase, controlled by photothermal conversion, help achieve adsorption and desorption. We demonstrated that the suction cups based on negative pressure adsorption can easily help miniaturize soft robotic devices and adapt to multiple types of substrates, making our approach applicable to tilted or slippery surfaces. By integrating the soft suction cups for surface attachment by dynamic control and a shape memory alloy as a deformable body, we developed a soft climbing robot that can perform precise, facile, and programmed controlled climbing under different conditions via remote light manipulation. Four continuous and directional climbing sequences on tilted and slippery surfaces were demonstrated. The results are expected to help advance the application of light-driven soft robots on tilted or slippery surfaces

Design and Testing of an End-Effector for Tomato Picking

Based on the structural shortage of an agricultural labor force and the continuous increase in tomato planting scale in China, as well as the limitation of a greenhouse working environment on the development of tomato picking productivity, a motor-driven end-effector for a tomato picking robot based on a hybrid force/position control strategy was designed. First, a hybrid force/position control strategy was applied to control the picking process. Consistent with this strategy, the mechanical structure design of the end-effector was determined. The maximum torque of the finger joint motor was verified by applying a load to the end-effector fingertip under a parabolic linear angular velocity. Second, the D-H method was used to establish the end-effector single-finger and whole-hand coordinate systems and to perform forward and inverse kinematic analysis. The Monte Carlo method was used to analyze the workspace of the end-effector, and an isochronous interpolation algorithm was used to analyze the angular displacement of the motor. A basic algorithm for starting, stopping and accelerating the finger joints was designed to achieve the smooth movement of the end-effector. The control system for the end-effector was designed based on STM32F103ZET6, and the end-effector remote wireless debugging system was designed based on Tiny6410. Finally, a test prototype of the tomato picking end-effector was manufactured and picking tests were conducted, which showed that our tomato picking end-effector moved smoothly. The proposed control algorithm reduced the impact force and recorded the contact force between the end-effector and the tomato in real time, and the end-effector essentially achieved nondestructive picking. Therefore, our tomato picking end-effector demonstrated good utility in practice.

Non-Contact and Non-Intrusive Add-on IoT Device for Wireless Remote Elevator Control

This work proposes an Internet-of-Things (IoT) device for remote elevator control. The new contribution of this proposal to the state-of-the-art is that it can convert a manually operated elevator into a remote controlled elevator without requiring any intrusive manipulation or wiring connection in the elevator. This IoT device has been designed as an add-on non-contact tool which is placed over the original elevator button panel, using servomotors to press the original buttons. This design allows its fast deployment as a remote control tool that increases elevator accessibility through the use of messages, a webpage or a QR code. Some application examples of this proposal are non-contact use of elevators in pandemic conditions, and the unsupervised use of elevators by autonomous cleaning or delivery mobile robots. The experimental evaluation of the IoT device in real operational conditions has validated its non-contact control features.

Study and Application of Remote Control Crawler Drilling Car for Mine Roadway

With the rapid development of mining technology in coal mines, the technical requirements for safe production in coal mines are constantly improving. In addition, it is affected by the geological conditions of the coal mine, the section of the roadway and the manpower reduction. There is an increasing demand for automatic and intelligent equipment for coal mine. A crawler-type double-arm rock drilling car which can be operated by wireless remote control is developed. It can be operated by remote control and adjusted manually. It can not only drill small diameter ordinary boreholes, but also drill large boreholes with diameter of 100-120 mm. It can effectively solve the problem of larger free surface in straight-hole cutting blasting. It is safe in operation and high in excavation efficiency.

Realization of Wireless Remote Control Intelligent Street Lamp by Single Chip Microcomputer

In order to better solve the huge power consumption of street lamps, it is not conducive to environmental protection and saving resources, and it is also to save manpower and financial resources. In this article, an infrared remote control LED light is designed, using the infrared control module and the single-chip control module, and also mainly used the characteristics of PWM combined with LED to save electricity. The designed LED light can be combined with the app on the mobile phone to realize the combination of software and hardware, and the control of the street light can be realized on the mobile phone. This article also propose to convert solar energy into electricity for street lighting, which is the direction of subsequent research and development.

UAV-Based Servicing of IoT Nodes: Assessment of Ecological Impact.

Internet of Things (IoT) nodes get deployed for a variety of applications and often need to operate on batteries. This restricts their autonomy and/or can have a major ecological impact. The core idea of this paper is to use a unmanned aerial vehicle (UAV) to provide energy to IoT nodes, and hence prolong their autonomy. In particular, the objective is to perform a comparison of the total energy consumption resulting from UAV-based recharging or battery replacement versus full provisioning at install time or remote RF-based wireless power transfer. To that end, an energy consumption model for a small license-free UAV is derived, and expressions for system efficiencies are formulated. An exploration of design and deployment parameters is performed. Our assessment shows that UAV-based servicing of IoT nodes is by far more beneficial in terms of energy efficiency when nodes at distances further than a few meters are serviced, with the gap increasing to orders of magnitude with the distance. Our numerical results also show that battery swapping from an energy perspective outperforms recharging in the field, as the latter increases hovering time and the energy consumption related to that considerably. The ecological aspects of the proposed methods are further evaluated, e.g., considering toxic materials and e-waste.

A Study on The Wireless Remote Safety Measurement Device for Structures based on Multi-Waterproof Sensors

Recently, as the need for constant safety management increases due to collapse accidents caused by external displacement of buildings, it is necessary to manufacture a construction ground gradient meter and serial open information technology (IT) sensor that can be monitored wirelessly based on epoxy resins, polyvinyl chloride (PVC) pipes, and communication cables. In particular, waterproof performance is required for ground monitoring of underground spaces with water, and for this purpose, research was also conducted to double mold the inside of the incline system. Construction IT convergence's building slope measurement device technology can respond to safety accidents by checking the amount of change in building displacement through a real-time online monitoring system. In addition, it is an industry with various application markets by converging IT technology into the existing construction industry and can be used as a pre-quake detection monitoring system for structural collapse accidents caused by external displacement. Therefore, it is intended to secure a sustainable facility safety management system through research in the field of real-time measurement technology on various facilities and surrounding ground behavior.

Design and Development of Solar Powered Automatic Irrigation System for Modernization of Agriculture

The aim of research is to reduce the utilization of water by irrigating the agricultural fields that have low moisture level through the implementation of Wireless Sensor Network (WSN). The ARM-based irrigation solution consists of a Solar Tracking System, Wireless Information Unit (WIU), WSN and Remote Access. The Solar Tracking System utilizes maximum solar energy by using Light Dependent Resistor(LDR) to track the sun. The electric energy produced is stored in the battery which powers the ARM processor. Wireless Information Unit will collect the sensor information from Wireless Sensor Network through the use of Wi-Fi. The system monitors soil-moisture and controls the flow of water using a solenoid valve depending upon the set threshold. In the tank, Ultra Sonic sensor identifies the water level controlled by the WIU. An Android application helps the farmer to monitor the water flow and soil moisture remotely. The proposed water management methodologies for agriculture optimizes the water usage and such practices maintain the crop health, keep yield intact, and avoids human intervention. In this proposed system, soil moisture is maintained appropriately to ensure that a good harvest is obtained which in turn preserves different types of nutrients.

A provably-secure authenticated key agreement protocol for remote patient monitoring IoMT

With the continuous improvement of the public medical system, the current medical service industry is more intelligent. The Internet-of-Medical-Things (IoMT) plays a significant role in smart medicine. The emergence of remote wireless monitoring platforms in the IoMT systems has significantly reduced the risk of virus infection among medical staff. However, data may be easily stolen by criminals during the transmission process. We propose a three-factor enhanced protocol to monitor patient body information and mitigate the issues. The proposed protocol can provide the confidentiality of transmitted data and the privacy of doctors and patients. The security of the proposed protocol is demonstrated in the Random Oracle Model (ROM) for computational security. In addition, by comparing the proposed protocol with other related works, our designed protocol has efficient performance both in execution time and communication costs.

Remote Control of Electrical Home Appliances Using RF Module based Remote

This study examines the use of an RF-based remote system to manage domestic electrical appliances. The wireless remote control based on an RF technology can toggle the status of equipment to ON or OFF from any site without necessitating a line of sight anywhere around house. The regulating circuit is developed around a 434 MHz operational frequency RF receiver and transmitter module, along with the HT12E encoder and HT12D decoder integrated circuits and a few other passive components. The four distinct channels at the encoder end are used as switches for input signal, and the four channels at the decoder end are used as outputs points, which is connected to the respective electrical devices that are to be controlled; if the appliances are of a higher rating, the relays are used as an intermediary to connect the equipment to the receiving end of the circuit. The transmission method used in this instance is Amplitude Shift Keying (ASK), and the circuit is powered with a 9V DC battery source. The main objective of this task entails creating a closed circuit without any programming knowledge and making it functional without the need for line-of-sight utilizing RF technology. Also, as proposed development to the current working model is stated with a brief description of its functioning, which aims to efficiently control more than four electrical units using the same remote-control technology with the aid of a matrix keypad as input for switching the states of the devices, a matrix encoder & decoder for respective encoding & decoding of signals, and a stable multivibrator for circuit operations.

Design and Implementation of a Smart Wireless Controlled Visual Acuity Measurement System.

In this article, a smart visual acuity measurement (VAM) system is designed and implemented. Hardware of the proposed VAM system consists of two parts: a wireless remote controller, and a high-resolution LCD controlled through a Raspberry-Pi mini-computer. In the remote controller, a 3.5" graphical LCD with a touch screen is used as a human-machine interface. When a point is pressed on the touch screen, the unique identifier (ID) code of that point as well as its page number is transmitted to the Raspberry-Pi. In the Raspberry-Pi, data are received and processed by a smart application coded in visual studio software. Then, the commanded tasks are executed by the Raspberry-Pi's operating system. Numerous charts, characters, and pictures are stored in the proposed VAM system to provide various VAM options while the size of the optotypes is adjusted automatically based on the distance of the patient from the LCD. The performance of the proposed VAM system is examined practically under the supervision of an expert optometrist where the results indicate that visual acuity, astigmatism, and color blindness of patients can be examined precisely through the proposed VAM system in an easier and more comfortable manner.

Design of remote wireless remote control system for corn harvester

A design method of remote wireless remote control system for corn harvester is pointed out. It can realize real-time monitoring, recording and video recording functions of corn harvester through remote control operating platform and operating terminal. The principle and components of remote control technology are introduced in detail in this paper.

Design of power control system for student dormitory

This design is based on the residential building of boarding school as the research object. The STC89C52RC single-chip microcomputer is used as the main control chip, and the clock chip, temperature chip, smoke collection module, A/D conversion, LED digital tube display circuit, matrix keyboard, infrared wireless remote control and other controllers are used to control the power system and adjust the access control system. This system is applicable to all kinds of colleges and universities that have strict management on students' electricity consumption. It can automatically control the electricity consumption of students' dormitories according to the school management regulations, and can automatically make emergency response to emergencies such as fire.

Rotation-control device for construction cranes with nested PID control

In the transportation of building materials utilizing construction cranes, for reducing the free rotation frequently of suspended loads from external disturbances in the horizontal plane, this paper proposed a Rotation-Control Device (RCD) by the momentum wheel activated based on the law of conservation of angular momentum. The mathematical mode was derived, and the simulation model was established to optimize the nested Proportional–Integral–Derivative (PID) controller. The prototype experiments were built to verify the effectiveness of the RCD. The experimental results show that RCD can rotate a suspended load to a set orientation precisely by wireless remote control. The significance of the results lies in the guaranteed safety of the operators, and the improvement of working efficiency. Future studies will focus on the implementation of the RCD in actual construction sites that include the velocity of the crane and the disturbance of the wire rope.

A Delay-Tolerant Network for Antarctica

Antarctica is the land of science. Every year, many studies are carried out in diverse disciplines. Some of these studies collect relevant data for their research with sensors. However, Antarctica's lack of telecommunication technologies hardens the possibility of automatizing this data collection. In most cases, the collection is done manually, limiting research projects' time and space scopes. Over the last years, some alternatives have been studied to deploy remote wireless sensor networks in Antarctica. Near-Vertical Incidence Skywave (NVIS) communications are an example of these alternatives. However, NVIS presents problems that cannot guarantee persistent end-to-end connectivity. For this reason, this article assesses adapting a delay-tolerant network protocol, the Bundle Protocol, to deliver sensor data reliably through an NVIS network. The scenario is developed and tested in the Riverbed Modeler simulator, and performance is evaluated through a trustworthiness model. A practical testbed is also presented.

Application research on piano teaching in colleges and universities based on remote wireless network communication

Abstract Against the background of the current COVID-19 pandemic and the popularisation of the Internet, the demand for online teaching is increasing in colleges and universities. But a course in music like piano teaching that requires multi-sensory learning still presents great challenges. Given this background, this paper analyses the system functional requirements of online piano teaching in colleges and universities, designs the overall system architecture including software and hardware, selects the wireless network communication method after analysis and judgement, and designs a remote wireless network-based system. Finally, the advantages and disadvantages of different protocol algorithms are compared.

Transmission schedule for jointly optimizing remote state estimation and wireless sensor network lifetime

This paper studies scheduling multiple sensors for jointly optimizing remote state estimation and wireless sensor network lifetime. Each sensor in the network sends its packet to the remote center for further estimation over wireless communication channels. Sensors in the network will inevitably run out of battery power due to transmission consumption and then reach the end of sensor network lifetime. This article focuses on the problem how to schedule multiple sensors minimizing the total remote estimation errors and simultaneously prolonging the sensor network lifetime. The problem is formulated as a special class of Markov decision process (MDP), stochastic shortest path (SSP) problem. Under this framework, we first derive a set of conditions to guarantee the optimality of structural policies in SSP. Subsequently, threshold structure of the optimal scheduling scheme is obtained by verifying the conditions. Moreover, two Value-of-Information-based multi-sensor scheduling algorithms and a linear-architecture-based learning algorithm are designed to tackle the curse of dimensionality and unknown channel statistics in large-scale sensor networks. Numerical simulations are given to validate effectiveness of our results.