Single-chip Microprocessor Research Articles

The design of energy-saving intelligent escape clothes hanger device

Due to the rapid development of economy and technology, floor molding of modern building are different, interior and exterior circuit design are more complex. Therefore, the fire also increases sharply, causing huge losses to the national economy and people’s life safety. The survival rate of personnel in serious fires has become the focus of the whole society. We take the clothes hanger as the research object in the paper, refit the clothes hanger, and provides an intelligent escape device to speed up the escape time. The device mainly includes Single-Chip Microprocessor control module, communication module, detection module, alarm module and solar panel module. The device has simple structure and convenient installation, which solves the timeliness of personnel escape in the fire and avoids secondary casualties in the fire.

Optimal design and experiment of 2-DoF five-bar mechanism for flower seedling transplanting

The currently used large-scale flower seedling transplanting equipment is expensive and has poor adaptability, while the small-scale transplanting equipment has problems with seedling damage and low automation. In view of this situation, a 2-DoF five-bar transplanting mechanism for multiple-point picking to single-point planting was designed. In a motion cycle, the seedlings could be picked from the four holes of a seedling disc and then planted in the flowerpot at a given point through the motion control of actuators, where the coordination among the transplanting, flowerpot transporting, and seedling delivering in the developed system was simplified. For seedling picking, the end-effector inserted into the substrate near the root of the seedling stem for damage avoidance, the transplanting trajectory was designed based on the given trajectory-type waypoints that satisfies the requirements of flower seedling transplanting. Besides, the mathematical model was established, where the relationship of the motion between the parameters of the developed 2-DoF five-bar transplanting mechanism and the two actuators were optimized by the genetic algorithm. Finally, the corresponding control system was designed, the two actuators were driven by two servo motors, and the end-effector was controlled by an electromagnet in the transplanting arm to realize the seedling clamping and releasing motion. In addition, a dual servo motor synchronous linkage control method was established based on the DDA linear interpolation algorithm to reduce the deviation of the servo motors, the linkage control of the electromagnet and the motor was realized through a single-chip microprocessor to achieve the coordination of the actuators. The overall design was deployed in real transplanting working conditions for validation, where several 30-day broccoli seedlings were used as experimental objects. The seedling height was around 80–100 mm and the transplanting rate was 40 plants/min. Three sets of seedlings (384 seedlings in total) were transplanted with an average transplanting success rate of 91.81%.

Blind-assisting Waistcoat Based on Distance-Vibration Algorithm and Sensory Substitution Principle

At present, there are more than 200 million people having the congenital or acquired visual disorder in the world. Blindness make the daily activities of people subjected to various restrictions, and the most prominent restriction is obstacles in walking. The traditional guide tool used by most visual impaired people for assisting the walking has the defects such as single function, inconvenience in use, poor combination with the human body, etc. Therefore, with the development and increasing mature of the wearable device and the Internet-of-things technology, a new way is searched for solving the walking problem of the blind people, and the study for combining the blind assisting device with the frontier neuroscience, wearable technology and Internet of things can make the science and technology to benefit this disadvantaged group and has positive social significance. This study utilizes the laser radar to substitute the visual organ to acquire spatial distance information around the blind people, transmits the data to the Arduino single chip microprocessor to process through the serial port, and finally controls the vibration mode on the waistcoat through the Bluetooth communication, thereby innovatively converting the radar input into the vibration mode, developing the corresponding distance-vibration algorithm, and allowing the blind people to acquire the spatial obstacle information in a motion sensing mode. Over a given adaption period, as the user’s brain learns, understands and integrates different vibration modes, the user can directly have the vision-like depth perception of the space in a sensory substitution mode on neuroscience.

CONTACTLESS MEASURING OF TEMPERATURE WITH DIFFERENTIAL PHOTO RECEIVER

A method for contactless temperature measurement has been created with two photo receivers with different spectral sensitivity. An algorithm for processing the signals from both receivers of a single-chip microprocessor system has been developed. An optical system for the LWIR diapason of the spectrum is proposed.

Horizontal Directional Drilling-Length Detection Technology While Drilling Based on Bi-Electro-Magnetic Sensing.

The drilling length is an important parameter in the process of horizontal directional drilling (HDD) exploration and recovery, but there has been a lack of accurate, automatically obtained statistics regarding this parameter. Herein, a technique for real-time HDD length detection and a management system based on the electromagnetic detection method with a microprocessor and two magnetoresistive sensors employing the software LabVIEW are proposed. The basic principle is to detect the change in the magnetic-field strength near a current coil while the drill stem and drill-stem joint successively pass through the current coil forward or backward. The detection system consists of a hardware subsystem and a software subsystem. The hardware subsystem employs a single-chip microprocessor as the main controller. A current coil is installed in front of the clamping unit, and two magneto resistive sensors are installed on the sides of the coil symmetrically and perpendicular to the direction of movement of the drill pipe. Their responses are used to judge whether the drill-stem joint is passing through the clamping unit; then, the order of their responses is used to judge the movement direction. The software subsystem is composed of a visual software running on the host computer and a software running in the slave microprocessor. The host-computer software processes, displays, and saves the drilling-length data, whereas the slave microprocessor software operates the hardware system. A combined test demonstrated the feasibility of the entire drilling-length detection system.

Design and Realization of the Power Monitoring Network Based on Multifunctional Control Technology

The basic principle of serial port communication between single chip and computer is summarized, this paper describes a power monitoring system which is the real-time acquisition of voltage and current to the power supply system can be done using a single-chip micro-processor. It collects electric voltage, electric current data of power supply system by using single slice of machine. The collected data can be transferred to the upper-bit host controller for monitoring the power system. In practical power application, the system gains good effect.

Study of an Interactive System of Sight-Singing and Ear-Training

This paper introduces an interactive system of sight-singing and ear-training which combines the technology of single chip microprocessor (SCM) with learning music. It contains the functions of scanning keyboard, reading the key value, interruption service, reading file and displaying file. In order to strengthen the commonality and practicability of the system, SD card is used to store the materials and the ZNFAT32 file system is transplanted to organize the materials in the form of file directory. This interactive system can recognize and perform music automatically for the users and play significant role in education and entertainment.

Fabrication of compact poly(methyl methacrylate-co-butyl methacrylate-co-acrylic acid) microcapsules for electrophoretic displays by using emulsion droplets as templates

Microcapsules with smooth, transparent, and compact walls used for electrophoretic displays (EPDs) were prepared and characterized. The approach to fabricate EPD microcapsules was based on templating an oil-in-water emulsion stabilized by monodispersed poly(methyl methacrylate-co-butyl methacrylate-co-acrylic acid) latex particles synthesized by dispersion polymerization. The individual latex particles were then transformed into robust capsule walls by successively using solvent swelling, covalent cross-linking, and sintering. The diameter of the emulsion droplets was controlled by changing the concentration of latex in the emulsion, and the thickness of the wall changed according to the diameter of the latex particles. These microcapsules for EPDs were applied successfully in preparing a clock display panel controlled by a single-chip microprocessor operated at a low direct current voltage, demonstrating that these microcapsules can be used in EPDs.

Mark Horowitz's Link to Chip-to-Chip Communication: His Significant and Fundamental Contributions

Prof. Mark Horowitz has been focusing on how to enhance the performance of integrated circuits (ICs) and digital systems for over 30 years. In the late 1980s and early 1990s, he was among the pioneers who recognized the impact of technology scaling on a single-chip microprocessor and focused his research on architectural techniques, which was previously only possible on large expensive mainframes. His work on projects such as Mips-X [3], Torch, Dash [11], and flash [10] led to advancements in many areas including compilers, computer-aided design development, memories, high-speed logic, clocking, and mixed-signal design [12]. One such area of research is high-speed integrated input–output (I/O) interfaces and serialization/deserialization (SerDes).

The 2014 MICRO Test of Time Award Winners: From 1978 to 1992

This column features retrospectives from the authors of two MICRO Test of Time award-winning papers: Microprogrammed Implementation of a Single Chip Microprocessor by Skip Stritter and Nick Tredennick (MICRO 1978) and Code Generation Schema for Modulo Scheduled Loops, by Bob Ramakrishna Rau, Michael S. Schlansker, and Partha Tirumalai (MICRO 1992).

Development of an Automotive Electric Window Control System Based on CAN Bus

An electric window control system based on low-speed CAN bus has been developed to reduce the wiring harness of vehicle control system, improve the system reliability and cut overall costs. On the basis of requirement analysis of the control system, a CAN application layer communication protocol has been defined. The electric window control system has been designed using Freescale 16-bit single chip microprocessor MCS12DP256 as central processing unit, and the control software has also been developed, in which an integral algorithm was used to realize the anti-pinch function.

Application of Parameter-Adaptative Fuzzy PID Control in the Temperature Control System for Liquor Filling and Sealing Machine

In order to improve pass-rate of liquor filling products; avoid poor quality as a result of liquor leakage and volatility, the sealing device for liquor filling and sealing machine has been improved, a parameter-adaptative fuzzy PID controller and a temperature control device based on a single chip microprocessor have been designed. Practical applications have shown that the parameter-adaptive fuzzy PID control system has high control precision and good tracking performance, small overshoot, strong anti-voltage disturbance, stable and reliable heat seal connection quality, and can meet the requirement of production process. Key words:liquor filling and sealing machine,parameter-adaptative fuzzy PID control,single chip microcomputer,temperature control ,sealing device

Research of the Vehicle Load Control System Integration Device

With the gradual development of economy, the scale of transportation industry continues to expand. The problem of overload or overrun in the vehicle transport has emerged. Therefore, how simply and conveniently to know the vehicle load and how to effectively limit overload has become a key issue. This paper demonstrates the feasibility of vehicle load control system from the above problems. Through the pressure sensors installed in the vehicle suspension, the single-chip microprocessor receives the information transmitted by the pressure sensors, and calculates the total weight of the vehicle load; if overweight, the single-chip microprocessor will send commands to the ignition system, to stop the ignition system working. Its purpose is to improve vehicle safety and effectively reduce heavy workload of the vehicle detection station to improve their work efficiency.

Design of a Grating Generator for Three-dimensional Scanner

In the three-dimensional scanners (3D scanners) based on structured-light technology, the commercial video projector was always borrowed to act as the electronic grating generator, which is a key hardware to the device. But there were some defects existed. For example, the size was too large for setting in the case of the device, and it could not be controlled by a single chip microprocessor conveniently, etc.. To solve these problems, a new grating generator was designed. The gratings were numbered and encoded in computer instructions, and then a complex programmable logic device (CPLD) chip was used to control a liquid crystal on silicon (LCOS) video chip, to write its data ports directly corresponding to the instructions. It has small size, simple interfaces, prompt response, clear instructions, and it worked well. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.4920

A Feasible and Easy-to-Implement Anticollision Algorithm for the EPCglobal UHF Class-1 Generation-2 RFID Protocol

Dynamic frame slotted Aloha (DFSA) has been widely adopted to solve the anticollision problem in a radio frequency identification (RFID) system. In a DFSA procedure, the interrogator needs to continuously estimate tag backlog and select a new frame length for identifying the backlog. Intuitively, the accuracy of the tag estimator will affect the read performance. Hence, a considerable amount of research effort has been invested to improve the accuracy of backlog estimation. The improvement in general comes at the expense of large computation load and may lead to a serious challenge if one needs to implement such a kind of estimators in a real RFID system. This paper analyzes the influence of estimation error on read performance. Based on the analysis, we propose a feasible and easy-to-implement anticollision algorithm. Our proposed algorithm can achieve a normalized throughput of 35% that is very close to the theoretical maximum 36.1% for an EPCglobal UHF Class-1 Generation-2 system. The easy-to-implement advantage of our algorithm comes at the expense of only 1% reduction in normalized throughput as compared with the case where maximum throughput can be obtained. The results obtained are useful in designing fast and efficient interrogators. Note to Practitioners - A fast and efficient anticollision algorithm is required in many applications such as warehouse and supply chain management. Since most RFID interrogators are built with a single-chip microprocessor, whose computation ability or memory is limited. From the implementation point of view, a feasible algorithm should consider the compromise between complexity and performance. In order to easily implement the anticollision algorithm in a real RFID system, the proposed algorithm is based on a simple but sufficiently accurate method rather than complex models. The results obtained can be useful for the industry to develop fast and efficient RFID interrogators.

Ultrasonic Ranging System Based on Single Chip Microprocessor

Ultrasonic ranging (UR) technology has being used widely in many industries around the world. This paper aims to design and manufacture an ultrasonic distance measuring system with lower price and higher accuracy. Based on the deep study of principle of ultrasonic ranging, we designed the general plan and detailed electrical circuits for the ultrasonic distance measuring system based on single chip microprocessor of AT89S52, including the transmitter module of ultrasonic wave, receiving module of ultrasonic wave, display module etc. Then, we compiled the relative driven programs for all modules. After that, we debugged the combined system of hardware and software system. At last, the experimental results show that the cost is about 300RMB for 3 prototypes, measuring rang is 0.16~1.5m with the accuracy of 0.001mm, which means the ranging system meets the design requirements of lower price and higher accuracy.

Design of the Angular Displacement Sensor Based on Magnetoresistive Technology

The design of the angular displacement sensor based on magnetoresistive technology uses DSPIC30F3010 digital signal processor for computing. Having been amplified, magnetoresistive element output signal enters into the single-chip microprocessor A/D converter unit to operate together with the Hall components output signal operation processing, and ultimately generates the actual angular displacement values.

Design and Experimental Study on Digital Speed Control System of a Diesel Generator

This study proposed a kind of digital embedded controller for the diesel generator. Some digital circuit such as single chip microprocessor have been used in the system, therefore it can control the diesel more efficiently and accurately. Based on the theory analysis, a circuit card used in the control system has been developed by means of development tools, such as Altium10, PCB99 and Multisim. Besides, the control program corresponding to PID control algorithm has been used. The experiment results show that the controller is work well in the plateau low-temperature environment and normal environment. We are sure that our embedded controller offers a wide scope of application in the field of digital controllers in the diesel generator industry.

A Wireless-Transfer-Based Hydrogen Gas Sensing System With a Pd/AlGaN/GaN Heterostructure Field-Effect Transistor (HFET)

In this paper, a wireless hydrogen sensing system using a Pd/AlGaN/GaN heterostructure field-effect transistor (HFET) is developed and demonstrated. This HFET device shows good hydrogen sensing performance, including higher drain current variation (0.17 mA @ 1 ppm H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /air gas), fast response speed, and superior repeatability behaviors. For the sensing application, a readout circuit is designed to display the value of hydrogen concentration. Then, these data are fed into single chip microprocessor for later processing and wireless transmission. In addition, a grey polynomial differential model algorithm is employed to significantly reduce the redundant data for alleviate the wireless transmission load. The wireless monitoring of hydrogen concentration in a remote site longer than 50 m in distance is successfully demonstrated. From the experimental results, the proposed wireless hydrogen sensing system shows the advantages of high hydrogen sensing performance, easy operation, low cost, high portability, and effective wireless transmission.

A High-Resolution Ultrasonic Distance Measurement System Using Vernier Caliper Phase Meter

An ultrasonic distance measurement system for use in air is presented. The measurement is based upon the two-frequency continuous-wave (TFCW) phase-shift method. In the system, two vernier caliper phase meters are used to measure the phase-shift data. The phase meter circuit developed to emulate the vernier caliper to measure the phase shift is able to eliminate the measuring error and produce higher resolution results without increasing the clock frequency. A single-chip microprocessor is used to control the TFCW phase-shift measurement and send the data to a personal computer for distance calibration and examination. The experimental results show that the accuracy of the system is <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$\pm$</tex></formula> 0.1362 mm and the distance resolution is 0.04% of the wavelength corresponding to the 40-kHz ultrasonic wave at a range of 50–200 mm. Therefore, the main advantages of this system are high resolution, high accuracy, low cost, and ease of implementation.