A scanning probe microscope(SPM)stage controlled by three stepper motors is designed,which has more flexibilitiesthan that of one motor controlled stage,while the control whom is more complicated.In this project,we bu...A scanning probe microscope(SPM)stage controlled by three stepper motors is designed,which has more flexibilitiesthan that of one motor controlled stage,while the control whom is more complicated.In this project,we build the stageactions in an Arduino microcontroller,and finite state machine(FSM)is also built in the Arduino micro controller to communicatewith a computer and a radio frequency(RF)controller.A special displaying scheme with five states is employed to indicatethe operation of the stage.Finally,the stage is fully tested and has a700nm resolution in Z motion of the SPM.展开更多
This paper presents the design and implementation of a Stepper Motor using Nexys2 circuit board based on a Xilinx Spartan 3E Field Programmable Gate Array (FPGA) device with VHDL code. The algorithm implemented on FPG...This paper presents the design and implementation of a Stepper Motor using Nexys2 circuit board based on a Xilinx Spartan 3E Field Programmable Gate Array (FPGA) device with VHDL code. The algorithm implemented on FPGA allows a substantial decrease of the equivalent processing time developed by different velocity controllers. The Stepper Speed control is achieved using VHDL code, and the hardware digital circuit is designed for a programmable rotational stepper motor using VHDL as a tool and FPGA as a target technology. The 50 MHZ provided by the starter kit is divided to obtain the necessary delay time between the motor phases that ranges between 2 - 10 m seconds. Though output selections, the direction of rotation of the stepper motor besides the magnitude of the angle of movement and the rotation speed can be controlled. The major advantage of using reconfigurable hardware (FPGA) in implementing the Stepper Motor instead of a discrete digital component is that it makes modifications to the design easy and quick and also, the total design hence represents an embedded system (works without computer). The total programmable hardware design that controlled on the stepper motor movement, occupied an area that did not exceed 12% of the chip resources.展开更多
The somatotopic representation of specific body parts is a well-established spatial organizational principle in the primary somatosensory and motor cortices.
Agriculture is undoubtedly a leading field for livelihoods in China.As the population increases,it is necessary to increase agricultural productivity.By capturing the support and the increment in production on farms,t...Agriculture is undoubtedly a leading field for livelihoods in China.As the population increases,it is necessary to increase agricultural productivity.By capturing the support and the increment in production on farms,the need for freshwater used for irrigation increases too.Presently,agriculture accounts for 80% of overall water uptake in China.Unexpected overflow of water carelessly leads to waste of water.Therefore we created a programmed plant irrigation system with Arduino that mechanically supplies water to the plants and keeps it updated by transferring the message to user.Plant irrigation system employs the soil moisture sensor which controls a degree of moisture in the soil.If the humidity degree is lower,Arduino activates a pump of water to supply water to the system.The pump of water stops by design when the organism detects sufficient moisture in the ground.Each time the system is switched off or on,an electronic messaging is conveyed to the end-user through the IoT unit,informing the position of the soil moisture and the pump of water.A spray motor and the pump of water are grounded on the crane concept.Widely,this system is applicable for in small fields,gardens farms,etc.This design is entirely programmed and needed no human involvement.Furthermore,transmission of the sensor readings send through a Thing speak frequency to produce graphic elements for better inquiry.This study gathers the ideas of IoT(Internet of Things)with some engineering tools like machinery,artificial intelligence and use of sensors in an efficient way to respond current needs and extraction of resources by availing scientific methods and procedures that work on inputs.Moreover,this study further defines the engineering works that have been part of this field,but it requires more efficiency and reduction of energy as well as costs by adding more contribution of IoT in the field of agriculture engineering.展开更多
文摘A scanning probe microscope(SPM)stage controlled by three stepper motors is designed,which has more flexibilitiesthan that of one motor controlled stage,while the control whom is more complicated.In this project,we build the stageactions in an Arduino microcontroller,and finite state machine(FSM)is also built in the Arduino micro controller to communicatewith a computer and a radio frequency(RF)controller.A special displaying scheme with five states is employed to indicatethe operation of the stage.Finally,the stage is fully tested and has a700nm resolution in Z motion of the SPM.
文摘This paper presents the design and implementation of a Stepper Motor using Nexys2 circuit board based on a Xilinx Spartan 3E Field Programmable Gate Array (FPGA) device with VHDL code. The algorithm implemented on FPGA allows a substantial decrease of the equivalent processing time developed by different velocity controllers. The Stepper Speed control is achieved using VHDL code, and the hardware digital circuit is designed for a programmable rotational stepper motor using VHDL as a tool and FPGA as a target technology. The 50 MHZ provided by the starter kit is divided to obtain the necessary delay time between the motor phases that ranges between 2 - 10 m seconds. Though output selections, the direction of rotation of the stepper motor besides the magnitude of the angle of movement and the rotation speed can be controlled. The major advantage of using reconfigurable hardware (FPGA) in implementing the Stepper Motor instead of a discrete digital component is that it makes modifications to the design easy and quick and also, the total design hence represents an embedded system (works without computer). The total programmable hardware design that controlled on the stepper motor movement, occupied an area that did not exceed 12% of the chip resources.
文摘The somatotopic representation of specific body parts is a well-established spatial organizational principle in the primary somatosensory and motor cortices.
基金sponsored by the synergistic innovation center of Jiangsu modern agriculture equipment and technology(No.4091600014).
文摘Agriculture is undoubtedly a leading field for livelihoods in China.As the population increases,it is necessary to increase agricultural productivity.By capturing the support and the increment in production on farms,the need for freshwater used for irrigation increases too.Presently,agriculture accounts for 80% of overall water uptake in China.Unexpected overflow of water carelessly leads to waste of water.Therefore we created a programmed plant irrigation system with Arduino that mechanically supplies water to the plants and keeps it updated by transferring the message to user.Plant irrigation system employs the soil moisture sensor which controls a degree of moisture in the soil.If the humidity degree is lower,Arduino activates a pump of water to supply water to the system.The pump of water stops by design when the organism detects sufficient moisture in the ground.Each time the system is switched off or on,an electronic messaging is conveyed to the end-user through the IoT unit,informing the position of the soil moisture and the pump of water.A spray motor and the pump of water are grounded on the crane concept.Widely,this system is applicable for in small fields,gardens farms,etc.This design is entirely programmed and needed no human involvement.Furthermore,transmission of the sensor readings send through a Thing speak frequency to produce graphic elements for better inquiry.This study gathers the ideas of IoT(Internet of Things)with some engineering tools like machinery,artificial intelligence and use of sensors in an efficient way to respond current needs and extraction of resources by availing scientific methods and procedures that work on inputs.Moreover,this study further defines the engineering works that have been part of this field,but it requires more efficiency and reduction of energy as well as costs by adding more contribution of IoT in the field of agriculture engineering.
