Search

Our lawn mower is a self grass cutting vehicle running on solar energy which avoiding obstacles, increases the capability of complete mechanized grass cutting devoid of any necessity of any human intervention. Our structure requires a couple of 12V batteries to influence up the motors of the blades and for the movement. Lawn mowing is regarded as one of the most boring or tiring everyday jobs. It is also very reliable private robotic applications. The principle of this paper is to study and re-define the art in robotic lawn mowers to highlight the needs and capabilities of today's devices. A brief survey of available products, some patents and typical test bed prototypes are also provided. Some enabling techniques that make the vehicles more efficient are also suggested. We have utilized a solar board i.e. solar panel to charge the batteries the lawn mower and robot motors are interfaced to an Arduino Uno which governs the implementation of each motor. It is additionally used to interface an ultrasonic sensor for obstacle recognition and IR sensors for stopping the vehicle. The importance of this research lies in the presentation of an overview of a potential big market for personal vehicles.

A 77-year-old man with history of ischemic cardiomyopathy and left ventricular assist device (LVAD) presented with abdominal pain after a lawn mower accident. Examination and imaging revealed a displaced LVAD driveline and a pericardial hematoma secondary to traumatic coronary artery injury. The patient was treated with coronary artery coil embolization. (Level of Difficulty: Advanced.), Graphical abstract, A 77-year-old man with history of ischemic cardiomyopathy and left ventricular assist device (LVAD) presented with abdominal pain after a lawn mower…

Nowadays lawn mowers are widely used for trimming the grasses in the fields which acts like an interior decorator in companies, colleges, etc. Based on the function remote-operated lawnmower, grass cutting equipment which is having the range is restricted as the signal strength is very low and also it is quite expensive. The vital purpose to consider of the proposed work is to make the lawnmower eco-friendly, cost-effective. To overcome the above limitations, a lawnmower is remotely controlled using a device such as mobile phone can acts as a connection between the user and operation of the grass cutter. In this research work, among the two different uses of mobile phone through which one sends the video of the current pathway and the other as a receiver. The NodeMCU ESP8266 is pre-programmed to take control of any given input and output. The motor driver drives the DC motor for movement. The mobile phone is placed above the lawnmower which transmits the current pathway and performs the grass cutting operation.

Current conventional lawn mowers have the following drawbacks; high initial costs, increasing engine noise levels, high operating costs due to high fuel consumption rates, the need to implement perimeter wires across the desired lawn mowing field, and high exhaustion of the operator in the long operating time. Hence, the need for a system that can achieve the same cutting effect of the existing lawn mowers with little or no operator’s fatigue, minimized noise pollution and running cost has risen. In present work, design of an autonomous solar lawn mower, a robotic vehicle that cut grass automatically with little human intervention, is discussed. The robotic vehicle is powered by Lithium-Ion batteries and depend on solar power delivered from a solar base station for charging the batteries. The mechanical design of the vehicle is flexible with the ability to control the height of the vehicle during grass mowing. Differential steering, with the implementation of multiple sensors is presented for obstacle avoidance. Also, a Raspberry Pi microcontroller for the image processing application through a camera is used for path planning. Furthermore, a solar based station structure is designed for charging the robotic vehicle batteries with minimized running cost, utilization of renewable energy source, no health hazards, not having any effect on the environment, and human’s effort and time are saved.

Due to the continuous increase in fuel costs and the influence of the gas emitted from the burned fuel into the atmosphere, it is necessary to use a large amount of solar energy from the sun as a power source to drive the lawnmower. The lawnmower provides perfect operation and low noise and will be controlled by the Raspberry Pi controller for better performance and human-computer interaction. The main advantage of our project is to reduce the space, cost and manpower required. Due to its safety level and low noise level, lawnmowers can be used in various places, including hospitals.

This research develops a prototype of a remotely controlled lawn mower using Android smartphone with Bluetooth connection to avoid the risk of accidents. The lawn mower is controlled by an Android application developed with Mit App Inventor using HC-05 Bluetooth module connection. This prototype uses a DC motor as a driving motor to rotate the blade with an LM393 speed sensor using Arduino Uno microcontroller. The developed system is equipped with an option of grass height that can be adjusted. The test of HC-05 Bluetooth module resulted the maximum acceptable connection distance in the open space is 80 m and the maximum connection distance with a barrier is 10.45 m. DC motor speed tests are carried out on the lawn mowers at no load and loaded conditions. The results showed a slight decrease in motor speed at the grass height of 6 cm and 4 cm, but at 2 cm height the rotation dropped significantly.Keywords: lawn mower, remote control, Arduino Uno, Bluetooth, Android

The objective is to design and fabricate an autonomous lawn mower with the of simultaneous localization and mapping technique so that the lawn mower can map its location and mow the lawn without the human intervention. The heart of the mower is electric powered dc motors. The dc motors given to the wheels and blade of the mower are powered by a 12v battery. Using Kinect module the concept of slam has been introduced in the lawn mower. In addition to the slam, the lawn mower can also avoid obstacles with the help of ultrasonic sensor. The microcontroller used here is the raspberry pi which along with some motor drivers to limit the speed of the dc motors and also in controlling the mower to avoid obstacles with the feedback from the ultrasonic sensor. By comparing the average human walking speed the speed of the motors for the wheels have been fixed. As the mower is complete electrical there is no risk of pollution as like in engine driven mowers.

Aiming at the problem of inflexible steering and motion of robot, this paper applies fuzzy adaptive PID control algorithm to the differential steering control system of mowing robot to improve its rapidity and accuracy. In this paper, according to the domestic green environment and the overall parameters of the mowing robot, the overall design of the mowing robot is made, the fuzzy adaptive PID control algorithm of the mowing robot differential steering control system is designed, the mathematical model of the mowing robot differential steering is constructed, and the MATLAB/Simulink is used to simulate the fuzzy adaptive algorithm. The simulation results show that the response speed and overshoot of fuzzy adaptive PID algorithm are 2.42 s and 16.4, respectively, The response speed and overshoot of PID are 7.18 s and 36.3% respectively, so the dynamic performance of the differential steering control system based on Fuzzy Adaptive PID algorithm is better than that based on ordinary PID control.

We present the case of a 72-year-old man with hemoptysis after a thoracic projectile injury, which occurred while mowing the lawn. Chest radiograph followed by a computed tomography angiogram revealed a metallic foreign body in the right middle lobe of the lung. The patient underwent a right anterolateral thoracotomy where the object was successfully retrieved. The patient had an uneventful postoperative recovery.

Fatalities caused by animal attacks are rare, but have the potential to mimic homicide. We present a case in which a moose attacked and killed a woman who was walking her dog in a forest. Autopsy showed widespread blunt trauma with a large laceration on one leg in which blades of grass were embedded. Flail chest was the cause of death. The case was initially conceived as homicide by means of a riding lawn mower. A review of the case by moose experts and analyses of biological trace material that proved to originate from moose, established the true source of injury. The dog probably provoked a moose, which, in response, stomped and gored the victim to death. The injuries resembled those previously reported from attacks by cattle and water buffalo. Fatal moose attacks constitute an extremely rare threat in boreal areas, but can be considered in traumatic deaths of unknown cause.

Background: The incidence of intentional carbon monoxide (CO) poisoning is believed to have declined due to strict federal CO emissions standards for motor vehicles and the uniform application of catalytic converters (CC). We sought to compare ambient CO levels produced by automobiles with and without catalytic converters in a residential garage, as well as from other CO sources commonly used for intentional poisoning. Methods: CO levels were measured inside a free-standing 73 m3 one-car garage. CO sources included a 1971 automobile without CC, 2003 automobile with CC, charcoal grill, electrical generator, lawn mower and leaf blower. Results: After 20 minutes of operation, the CO level in the garage was 253 PPM for the car without a catalytic converter and 30 PPM for the car equipped with one. CO levels after operating or burning the other sources were: charcoal 200 PPM; generator >999 PPM; lawn mower 198 PPM; and leaf blower 580 PPM. Conclusions: While emissions controls on automobiles have reduced intentional CO poisonings, alternate sources may produce CO at levels of the same magnitude as vehicles manufactured prior to the use of catalytic converters. Those involved in the care of potentially suicidal individuals should be aware of this.

This work focuses on the development of a fully autonomous lawn mower that can be used by people with limited mobility. The lawn mower can be set to cover a predefined area autonomously or it can be controlled manually via a radio-control (RC) transmitter, which allows the user to remotely control the lawn mower in any direction, turn the mower motor at a desired speed, and adjust the grass cutting height. In autonomous mode, the user can also define the area to be mowed and program the grid pattern the lawn mower will follow. Once the prototype was completed, the lawn mower was field tested to verify the overall functionality and accuracy of the autonomous mission plan and to determine the overall runtime battery life. Results of the fully-functional prototype demonstrate a successful autonomous operation.

This study proposes a vision-based mowing boundary detection algorithm for an autonomous lawn mower. An autonomous lawn mower requires high moving accuracy for efficient mowing. This problem is solved by using a vision system to detect the boundary of two regions, i.e., before and after the lawn mowing process. The mowing boundary cannot be detected directly because it is ambiguous. Therefore, we utilize a texture classification method with a bank of filters for classifying the input image of the lawn field into two regions as mentioned above. The classification is performed by threshold processing based on a chi-squared statistic. Then, the boundary line is detected from the classified regions by using Random sample consensus (RANSAC). Finally, we apply the proposed method to 12 images of the lawn field and verified that the proposed method can detect a mowing boundary line with centimeter accuracy in a dense lawn field.

Accidents while using lawn mowers are often reported, but chest injuries are rare. We report a case of a penetrating pulmonary injury due to a rusty nail thrown by a lawn mower. A 63-year-old man injured his left precordium by a thrown object while using a lawn mower; he thereafter visited a nearby hospital. A computed tomography image showed a left-sided pneumothorax and a penetrating pulmonary injury of the left upper lobe due to a foreign body. Pneumothorax was treated with thoracic drainage and resolved. He was transferred to our hospital on the second day after the injury, and video-assisted thoracoscopic surgery was performed to remove the foreign body. Surgical findings showed a penetrating wound in the left upper lobe and leakage of pus from its margin. The foreign body was a rusty nail. The penetrating wound was treated by partial pulmonary resection to control the infection. Histopathological findings revealed the formation of a lung abscess. Penetrating pulmonary injuries do not require surgical treatment for most patients. However, residual foreign bodies can cause lung abscesses. The removal of foreign bodies depends on the type of injury as well as the type and location of the foreign body. Theoretically, the foreign body should be removed and the penetrating pulmonary injury should be treated, if possible, to control infection.

Tema završnog rada je koncipiranje i konstruiranje robotskog uređaja za košnju trave na baterijski pogon. U radu je navedena povijest i vrste kosilica. Navedeni su i uspoređeni slični uređaji na tržištu. Napravljena je funkcijska dekompozicija i morfološka matrica uređaja. Prema tome su najbolja ponuđena rješenja detaljnije razrađena. Odabrani su standardni dijelovi. Izrađen je 3D CAD model uređaja i pripadna tehnička dokumentacija u softverskom paketu SolidWorks 2016. The topic of this bachelor thesis is design and development of a battery powered robot lawn mower. In the introduction the history of lawn mowers is described as well as different types of lawn mowers. Similar devices currently on the market are listed and compared. The functional decomposition and morphological matrix of the device where created. The best solutions where further elaborated and standard parts where selected. The 3D CAD model of the device and the associated technical documentation were created in the SolidWorks 2016 software package.

Objectives: Characterization of the epidemiology and cost of lawn-mower injuries is potentially useful to inform injury prevention and health policy efforts. We examined the incidence, distribution, types and severity, and emergency department (ED) and hospitalization charges of lawn-mower injuries among all age groups across the United States. Methods: This retrospective, cross-sectional study used nationally representative, population-based (all-payer) data from the US Nationwide Emergency Department Sample for lawn-mower–related ED visits and hospitalizations from January 1, 2006, through December 31, 2013. Lawn-mower injuries were identified by using International Classification of Diseases, Ninth Revision, Clinical Modification code E920 (accidents caused by a powered lawn mower). We analyzed data on demographic characteristics, age, geographic distribution, type of injury, injury severity, and hospital charges. Results: We calculated a weighted estimate of 51 151 lawn-mower injuries during the 8-year study period. The most common types of injuries were lacerations (n = 23 907, 46.7%), fractures (n = 11 433, 22.4%), and amputations (n = 11 013, 21.5%). The most common injury locations were wrist or hand (n = 33 477, 65.4%) and foot or toe (n = 10 122, 19.8%). Mean ED charges were $2482 per patient, and mean inpatient charges were $36 987 per patient. The most common procedures performed were wound irrigation or debridement (n = 1436, 29.9%) and amputation (n = 1230, 25.6%). Conclusions: Lawn-mower injuries occurred at a constant rate during the study period. Changes to nationwide industry safety standards are needed to reduce the frequency and severity of these preventable injuries.

Agriculture have a large contribution in Indian economy. It is one of largest source of employment. Though manually rice transplanting gives us a uniform crop it is expensive and it requires lot of labour also involving lot of hard work [4]. Lots of efforts has been made in design and modification of this machine to make the rice transplanting system more economical comparatively [7]. This study is concentrated on Design & Manufacturing of Manually Operated Multipurpose Rice Transplanter by providing supplementary arrangement like grubbing,lawn mower for limited areas in Indian rice cultivation especially for Konkan region. The proposed work can be done by removing the complexity in the mechanism,reduced cost and reduce weight of today�s rice transplanting machines. https://www.ijiert.org/paper-details?paper_id=141140

The vibrational behavior of vehicles is a crucial issue for the comfort, especially for the professional vehicles. This paper presents a simplified modelling approach for studying the vibrational behavior of a lawn tractor. The vibrational response of a real vehicle is analyzed by an extensive experimental modal analysis and Finite Element model (FE) simulating the modal behavior of the whole tractor. The FEM was then validated by the comparison with the experimental results and then used for identifying the components and connections effectively driving the modal response. Based on these results, a simplified Multi-Body (MB) model, able to reproduce the vibrational response of the studied lawn mower, was then setup, showing good correspondences with experimental results. General guidelines for defining effective vehicles Multi-Body modal models were also derived.

In current days, grass cutter machines are operated by fuel and electrical energy which are costly and requires high maintenance. Hence, in this study, a hand-held operated machine for grass cutting was designed and fabricated by using locally available materials. Important aspects such as durability, strength, and light weight were taken into design considerations for better performance characteristics. The lawn mower was powered by a 12V/1.35A rechargeable battery which drives the DC motor up to a rotational speed of 19,300 RPM. As a result, the generated torque will be transferred to the cutting head mechanism for efficient grass cutting. The entire configuration set up was mounted on a wooden base which attached together with a bicycle frame and a set of wheel arrangement. This portable lawn mower can be used to maintain and trim grass in gardens, home, schools or yards. &nbsp