Slave Computer Research Articles

Automatic testing system design and data analysis of permafrost temperature in Qinghai-Tibet Railway

Aimed at the characteristics of permafrost temperature influencing the safety of Qinghai-Tibet Railway and its on-line testing system, comparing the achievement of permafrost study nationwide with those worldwide, an automatic testing system of permafrost temperature, containing a master computer and some slave computers, was designed. By choosing high-precise thermistors as temperature sensor, designing and positioning the depth and interval of testing sections, testing, keeping and sending permafrost temperature data at time over slave computers, and receiving, processing and analyzing the data of collecting permafrost temperature over master computer, the change of the permafrost temperature can be described and analyzed, which can provide information for permafrost railway engineering design. Moreover, by taking permafrost temperature testing in a certain section of Qinghai-Tibet Railway as an instance, the collected data of permafrost temperature were analyzed, and the effect of permafrost behavior was depicted under the railway, as well as, a BP model was set up to predict the permafrost characteristics. This testing system will provide information timely about the change of the permafrost to support the safety operation in Qinghai-Tibet Railway.

Distributed Hybrid Genetic Algorithms for Structural Optimization on a PC Cluster

Even though several genetic algorithm (GA)-based optimization algorithms have been successfully applied to complex optimization problems in various engineering fields, such methods are computationally too expensive for practical use in the field of structural optimization, particularly for large-scale problems. Furthermore, the successful implementation of GA-based optimization algorithm requires a cumbersome routine through trial-and-error for tuning the GA parameters that are different depending on each problem. Therefore, to overcome these difficulties, a high-performance GA is developed in the form of a distributed hybrid genetic algorithm for structural optimization, implemented on a cluster of personal computers. The distributed hybrid genetic algorithm proposed in this paper consists of a μ-GA running on a master computer and multiple simple GAs running on slave computers. The algorithm is implemented on a PC cluster and applied to the minimum weight design of steel structures. The results show that the computation time required for GA-based optimization can be drastically reduced and the problem-dependent parameter tuning process can be avoided.

Development of an Integrated Instrument for Nucleic Acid Pyrosequencing Detection

This paper introduces a kind of new homemade and low cost multi-channel nucleic acid pyrosequence detector for at least ninety-six channels and presents the detail of related software and hardware development. We construct a kind of automatic instrument to fulfill the pyrosequencing processes. First we select the X-86 personal computer as host computer, the AT89C51 micro-controller as slave computer, the PMT (photoelectric multiply tube) as photoelectric transformation equipment, and the HY-6022 as data sampling device; Second we use the Visual C++ 6.0 as coding tools to design the measure and control system based on Windows 2000 operating system; Third we sample the fluorescent signal in all of the cuvettes during the reaction between nucleic acid and reagent; Last we analyze these data to realize the function of the multi-channel nucleic acid detection. In this paper the whole instrument design and key parts design are both introduced such as the liquid injection process and related structure design, the communication module between the host personal computer and the MCS51, the high sensitivity multi-channel detector (at least 96 channels, the sensitivity is 2.45×10-9w) etc. The result of the instrument for two channels data processing is also reported in this paper.

The Computer Control System of a Wall-Climbing Inspection Robot

AbstractThis paper describes a master-slave computer control system of the wall-climbing inspection robot. The optical fibers are used in the system to realize the long-distance communication between the master computer and the slave computer. the data signal. audio signal and video signal are mixed together to be transmitted. The conununication protocol between the master computer and the slave computer is designed to transmit the data synchronously and correct any conununication error automatically.

High speed RS-232 fibre optic communication system for underwater remotely operated vehicles

The design and implementation of a communication system for an underwater remotely operated vehicle (ROV) are presented. The system is assumed to be composed of a remotely operated vehicle driven by a set of seven thrusters, a tethering cable including power supply cables and two fibres for communication (the function of which is to transmit and monitor information) and a surface master controlling computer. A second slave computer with its appropriate A D and D A interfacing cards is included in the ROV. The design and implementation of the fibre optic communication system between these two computers are presented in this paper. The appropriate control information is acquired and suitable control commands are send to the ROV through this system. With special RS-232C port handling, transfer rates up to 115.2 kbps are achieved. This communication system is fast enough for telemetry and control signals and can be used in a variety of related applications.

A Teleoperated Microsurgical Robot and Associated Virtual Environment for Eye Surgery

We have developed a prototype teleoperated microsurgical robot (MSR-1) and associated virtual environment for eye surgery. Bidirectional pathways relay visual, auditory, and mechanical information between the MSR-1 master and slave. The surgeon wears a helmet (visual master) that is used to control the orientation of a stereo camera system (visual slave) observing the surgery. Images from the stereo camera system are relayed back to the helmet (or adjacent screen) where they are viewed by the surgeon. In each hand the surgeon holds a pseudotool (a shaft shaped like a microsurgical scalpel) that projects from the left and right limbs of a force reflecting interface (mechanical master). Movements of the left and right pseudotools cause corresponding movements (scaled down by 1 to 100 times) in the microsurgical tools held by the left and right limbs of the micromotion robot (mechanical slave) that performs the surgery. Forces exerted on the left and right limbs of the slave microsurgical robot via the microtools are reflected back (after being scaled up by 1 to 100 times) to the pseudotools and hence surgeon via actuators in the left and right limbs of the mechanical master. This system enables tissue cutting forces to be felt including those that would normally be imperceptible if they were transmitted directly to the surgeon's hands. The master and slave subsystems (visual, auditory, and mechanical) communicate through a computer system which serves to enhance and augment images, filter hand tremor, perform coordinate transformations, and perform safety checks. The computer system consists of master and slave computers that communicate via an optical fiber connection. As a result, the MSR-1 master and slave may be located at different sites, which permits remote robotic microsurgery to become a reality. MSR-1 is being used as an experimental testbed for studying the effects of feedforward and feedback delays on remote surgery and is used in research on enhancing the accuracy and dexterity of microsurgeons by creating mechanical and visual telepresence.

Automatic bioprocess control. 2. Implementations and practical experiences

Our improved implementation for bioprocess control allows flexible responses to many process needs. It is based on computer equipment consisting of three hierarchically ordered levels. On the lowest level, a DDC slave computer handles setpoints and simple tasks generating the chemical and physical environment for the cells. It can be designed manually by the user or automatically by the supervisory computer on the second level. This provides for raw data organization, analysis and interpretation either to support personnel on line in decision making, to select predefined control strategies, or even to search for others. In the coordinating computer on the third level, common tasks of different supervisory computers (bioprocesses) are shared, saving money for the equipment. Tasks and concepts as well as experimental experiences are described to outline the capabilities of the configuration.

Computer-aided impulse-voltage testing

The automation of impulse voltage tests by a control and measuring system based on computers (computer-aided control and measurement system) offers new possibilities for high-voltage (HV) research and quality inspection. An industrially manufactured computer-aided control and measurement system is presented. Its hardware is characterized by a master computer for data input, operation, and data processing, and a slave computer for all fast control processes. It can be extended by a digital voltage/time measuring system. The computer-aided control and measurement system is well protected against interference by protective circuits, optical links, and electromagnetic shielding. The software comprises the automatic control and supervision of the generator, programs for all typical impulse voltage tests, evaluation of the voltage parameters, statistical processing of the measured data and printing of the test record.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

A dual-parameter multichannel analyzer by a dual-computer system

The design and feasibility of a simple and practical system for measuring two-parameter signals is reported. A dual-parameter multichannel pulse-height analyzer (MCA) which uses two central processing units (CPUs) is developed and designed. One computer (master computer) controls the other computer (slave computer), and also displays, records, and analyzes the data. The slave computer controls two analog-to-digital converters (ADCs), collects the dual-parameter data, and transfers the collected data to the master computer. Three methods of data transfer between the two CPUs are examined and discussed. The count capacity at the data collection by the slave computer is 2/sup 16/-1/ch (2-B-long data), and this is expanded to 2/sup 32/-a/ch (4-B-long data) at the master computer. The data are analyzed and at any time stored in the storage apparatus by the dual CPU system. The system demonstrates stable operation over long measurement periods.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Advanced Vehicle Command and Control System (AVCCS)

This paper explores the research under way in developing an autonomous vehicle command and control system; it also explains the means by which guidance is maintained and in‐yehicle navigation system are integrated into the vehicle control system. This system integration feature allows the vehicle to operate in a mixture of both automatic and manually controlled vehicles. The unique features investigated in this research include the relationship between the on‐board control system and other nonautomated automobiles; the efficiency and usefulness of the new navigation concept; and the system approach to interactive linking of the in‐vehicle control system with three transportation modes: (1) Other automated vehicles; (2) other nonautomated vehicles; and (3) the public street and/or freeway control system. Further discussed, in system descriptive terms, is the actual in‐vehicle control system, in‐pavement transponders, a flux gate compass, an automatic vehicle location reader, and lateral/longitudinal radar proximity devices. The text also illustrates the logic of the on‐board control system including the development of the various signal conditioning devices and local slave computer systems required to drive the main management/navigational computer system.

Seismo-acoustic detection, identification, and tracking of stealth aircraft

An aircraft detection system which detects and tracks aircraft using: arrays of seismic and acoustic sensors, a set of junction circuits, a set of subarray circuits, several slave computers, and a master computer. Each junction circuit relays detected signals from several adjacent sensors to a subarray circuit and command signals to each of the sensors to adjust the gain of their output signals. Each subarray circuit receives and unites the outputs of several adjacent junction circuits into a subarray which has a particular geographical location in the array of sensors. Each slave computer forwards detected signals from single subarray circuit to the master computer, and relays command signals back to each individual sensor. Each subarray is able to track the seismic or acoustic signature of an aircraft as it travels across the regular distribution of sensors. Each subarray is thereby able to define an azimuth to the target aircraft. Collectively the information from several subarrays yields several azimuths from which the position of the aircraft may be located by triangulation of the azimuths.

Real-time data acquisition system for laser and radio frequency spectroscopy

A low-cost real-time data acquisition system utilising a master (PC-XT) and a slave (Z80) computer for high-resolution atomic spectroscopy is described. The master and the slave computer are linked by a high-speed parallel FIFO buffer permitting data acquisition on a fixed time schedule with 4 mu s time resolution. A modular interface box allows the system to control complex spectroscopic experiments. The use of commercial software packages allows fast and efficient data reduction and analysis on the same computer system. The performance of the system has been demonstrated in polarisation spectroscopy experiment on zirconium.

三次元自動測定・加工システムに関する研究 コスメティックカバー製作への適用

The present paper deals with a manufacturing method for a symmetric cosmetic cover to a natural residual hand of handicapped person. Recently, the automatic measuring technique with a three dimensional measuring machine is incorporated in the field of CAD/CAM (Computer Aided Design/Computer Aided Manufacturing). However, this technique is difficult to apply in the complicated object like a natural hand. This study is to measure the residual hand of handicapped person automatically, secondly is to manage the measured numeric values, and finally is to mill a model of cosmetic cover for the affected hand with the same set up, a three dimensional drive machine, a host computer and a slave computer. The problems investigated involve the automatic measurement, the data management and the milling method for the complicated hand form. As the results, a symmetric cosmetic cover can be manufactured easily. The utility became possible in the medical and industrial fields.

Developing a low-cost parallel processor system for real time microcomputer applications

The authors detail their development, using available hardware and software technology, of a parallel processing environment for Furman University. Developmental stages included the design, construction, and testing of a 2708/2716/2758 EPROM programmer/reader, the design of general-purpose, microprocessor-driven "slave" computers (interfaceable in a variety of networks with a "master" computer, the departmental Apple II), the design of flexible operating systems within the slave computers, and the construction of slave computers for use in a variety of applications.

Sharing a microcomputer between different experiment and plotting tasks, under control of a multiprogrammed computer.

At the H C Orsted Institute the multiprogrammed medium-size RC4000 computer is used for time sharing and batch and process control. The advent of cheap microprocessors has opened new ways for building controllers for this type of computer. It is shown that using a microcomputer as a slave computer can cut the resource demands in an on-line plotting system considerably and that the microcomputer can handle time-critical problems in process control of experiments without losing the advantages of using a multiprogrammed computer. The programs to the microcomputer are assembled on the 4000 and loaded directly into the microcomputer memory.

Computer Interface Design between a Master Computer and a Slave Computer for Simulation Control and Instrumentation Monitoring of the Brookhaven 200 MeV Linac Accelerator

An interface design is proposed for tie-in between a master computer and a slave computer for transferring of data and control signals between the 200 MeV Linear Accelerator and a master computer station. Report discusses device control, device selection and control for a party line I/O bus, sensing techniques, and graphic display simulation.