Development of single-chip fuzzy controller based on FFSI in binary

Length and concise structure of fuzzy logic reasoning program and its real-time reasoning characteris-tic have their effect on the performance of a digital single-chip fuzzy controller. The control effect of a digitalfuzzy controller based on looking up fuzzy control responding table is only relative to the table and not relative tothe fuzzy control rules in the practical control process. Aiming at above problem and having combined fuzzy log-ic reasoning with digital operational characteristics of a single-chip microcomputer, functioning-fuzzy-subset in-ference (FFSI) in binary, in which triangle membership functions of error and error-in-change are all represen-ted in binary and singleton membership functions of control variable is binary too, has been introduced. The cir-cuit principle plans of a single-chip fuzzy controller have been introduced for development of its hardware, andthe primary program structure, fuzzy logic reasoning subroutine, serial communication subroutine with PC andreliability design of the fuzzy controller are all discussed in detail. The control of indoor temperature by a fuzzycontroller has been conducted using a testing-room thermodynamic system. Research results show that the FFSIin binary can exercise a concise fuzzy control in a single-chip fuzzy controller, and the fuzzy controller is there-fore reliable and possesses a high performance-price ratio.

Gas concentration monitoring system for small and medium-sized coal mines based on gas-sensing detection and single-chip control

This paper is aimed at the actual conditions of disaster caused by gas in small and medium-sized coal mines. A new gas concentration monitoring system for coal mines is developed on the basis of gas-sensing detection and single-chip control. The monitoring system uses the tin oxide as the main material of N-type semiconductor gas sensors, be- cause it has good sensitive characteristics for the flammable and explosive gas （ such as methane, carbon monoxide）. The QM-N5-semiconductor gas sensor is adopted to detect the output values of the resistance under the different gas con- centrations. The system, designedly, takes the AT89C51 digital chip as the core of the circuit processing hardware structure to analyze and judge the input values of the resistance, and then achieve the control and alarm for going beyond the limit of gas concentration. The gas concentration monitoring system has man）, advantages including simple in struc- ture, fast response time, stable performance and low cost. Thus, it can be widely used to monitor gas concentration and provide early wamings in small and medium-sized coal mines.

A Single-Chip UHF RFID Reader Transceiver IC

A single-chip UHF RFID reader transceiver IC has been implemented in 0.18 μm SiGe BiCMOS technology. The chip includes all transceiver blocks as RX/TX RF front-end, RX/TX analog baseband, frequency synthesizer and I2C with fully-compliant China 800/900 MHz RFID draft, ISO/IEC 18000-6C protocol and ETSI 302 208-1 local regulation. The normal mode receiver in the presence of -3 dBm self-jammer achieves -75 dBm 1% PER sensitivity. The linear class-A PA integrated in transmitter has 25 dBm OP1 dB output power for CW. The fully-integrated fractional-N fre-quency synthesizer is designed based on MASH 1-1-1 sigma-delta modulator and 1.8 GHz fundamental frequency LC-VCO for lower in-band and out-of-band phase noise. The measured phase noise is up to -106 dBc/Hz@200 kHz and -131 dBc/Hz@1 MHz offset from center frequency and the integrated RMS jitter from 10 kHz to 10 MHz is less than 1.6 pS. The chip dissipates 330 mA from 3.3 V power supply when transmitting 22.4 dBm CW signal and the PAE of linear PA is up to 26%. The chip die area is 16.8 mm2.

单片机,DSP,PLD/EDA的介绍、比较和分析

当今,数字时代的核心动力便是单片机,DSP,PLD/EDA,以其各自的特点满足了各种需要,推动着信息技术的快速发展。这里将对这三类电子产品分别加以介绍,并作比较和分析。

Research on Control System of Spindle Drive for High Speed Spinning Machine

Through analyzing the principle of spindle drive of winding mechanism for high speed spinning machine,the article not only describes a kind of mode of spindle drive for take-up motion on the basis of control method of constant velocity winding, but also introduces the design technique of software and hardware for the control system of mechatronics of spindle drive mode for take- up motion on the basis of constant velocity winding for high speed spinning machine with single-chip microcomputer. The mathematical model to describe the spindle rotating speed is established. It is an important technology for high speed spinning machine and provides a feasible application way.

Investigation on the stepping arc stud welding process

Through the investigation on traditional arc stud welding process, a new welding gun and its control system were developed in this paper. The stepping arc stud welding gun was mainly made by a stepping motor as actuating unit and a screw-driven device as moving unit. A control system with a MCS-51 single-chip microcomputer as main control component was used to realize the new stud welding procedure. This new welding process with stepping stud welding gun is named as stepping arc stud welding. In the new welding process, the stud action can be looked as constituted by some micro steps. The setting and adjusting of the stepping arc welding gun behavior parameters are accomplished independently. It is indicated from the results of process tests and bending test that the stepping arc stud welding process is practicable.

A New Design Method for Variable Digital Filter Based on Field Programmable Gate Array(FPGA)

In order to obtain variable characteristics,the digital filter's type,number of taps and coefficients should be changed constantly such that the desired frequency-domain characteristics can be obtained.This paper proposes a method for self-programmable variable digital filter(VDF) design based on field programmable gate array(FPGA).We implement a digital filter system by using custom embedded micro-processor,programmable finite impulse response(P-FIR) macro module,coefficient-loader,clock manager and analog/digital(A/D) or digital/analog(D/A) controller and other modules.The self-programmable VDF can provide the best solution for realization of digital filter algorithms,which are the low-pass,high-pass,band-pass and band-stop filter algorithms with variable frequency domain characteristics.The design examples with minimum 1 to maximum 32 taps FIR filter,based on Modelsim post-routed simulation and onboard running on XUPV5-LX110T,are provided to demonstrate the effectiveness of the proposed method.

Application on drilling parameter monitor in drilling engineering monitoring

The drilling parameter monitor is an important tool in drilling engineering applied to monitoring drilling process,carrying out scientific analysis and decision--making.Based on discussing the present development situation of the domestic and foreign drilling machine parameter monitors,the metering scheme for vehicle--loaded drilling parameter monitor was designed.By using detection system for MSP430 single--chip microcomputer(SCM) in combination with peripheral circuit such as sensors,the drilling--rig control system was obtained to detect,and for every parameter in real--time display in order to keep operating the drilling rig status.The experiment shows that the drilling parameter monitor reaches design requirements and can be applied to drilling engineering monitoring,which has characters such as simple structure,high credibility and low cost.

The Innovation of CNC Machine Interface Based on DNC System

This paper describes the innovation schemes of the interface of a CNC machine which cannot communicate with a computer by a Direct Numerical Control(DNC)interface and the functions of a DNC interface system.One architecture of hardware and software of a practi- cal single-chip computer based on DNC interface system developed by the authors is given. Without any change of the original hardware and software,this DNC interface system has been used to innovate the CNC machine's interface to implement the direct communication between a computer and a CNC machine and to achieve no tape transmission of a part program and ma- chine parameters.It has been demonstrated that this DNC interface system has certain practical values in improving the reliability,efficiency and production management of CNC/NC machine.

THE CONTROL, DRIVE AND DISPLAY CIRCUITS ANDDEVICES IN OPTO-ELECTRONIC 2-D PROGRAMMABLE NEURAL NETWORK

In an optoelectronic 2-D programmable neural network system, optical data need to be transferred and feedback with high speed. This paper presents the design and implementation of the interface circuit and its software.

Fault-Tolerant Design Techniques in ACMP Architecture

Single-chip multiprocessor (CMP) combined with the fault-loleranl(FT)techniques offers an ideal architecture to achieve high availability on the basis of sustaining highcomputing performance FT design of a single-chip multiprocessor is described, including thetechniques from hard-wart redundancy to software support and firmware strategy. The design aims atmasking the influences of errors and automatically correcting the system states.

Design of Greenhouse Temperature and Light Intensity Control Circuit

In view of domestic scientific and technological achievements at present,real-time control circuit for greenhouse temperature and light intensity has been designed in line with the principle of cost saving and easy control.With advanced temperature sensor and light sensor applied to measure the temperature and light intensity,an execution unit is controlled by single-chip microcomputer(SCM)to regulate the temperature and light intensity,creating a hardware design scheme and software design idea.In case of high temperature and high light intensity in greenhouse,the sunshade net will be put down and the blower will be started automatically;in case of low temperature and light intensity,the sunshade net will be folded up and the heating valve will be turned up automatically.In this way,the temperature and light intensity in greenhouse will be controlled within the designed range.

THE INDUSTRIAL TV SYSTEM OF MULTI-SPOT TELECONTROLLING AND MONITORING

This system can not only monitor the video signals from 16TV cameras at 10 different spots simultaneously, but also telecontrol the 16 cameras. The hardware in the system is simple, applicable and reliable, because intelligent components have been adopted and many functions can be achieved by software. Even if the code rates deviate from the designed value (300 baud/s) in 50 times, the remote signals can still be exactly received by the code rate measuring with software. The elash among remote signals from multiple spots is completely eliminated by checking their priorities with software.

Design of Power Supply for On-line Monitoring System of Transmission Lines

This paper uses CT to gain the energy directly from the high-voltage transmission line, to address the problem of power supply for monitoring system in high voltage side of transmission line. The draw-out power coil can induce voltage from the transmission line, using single-chip microcomputer to analog and output PMW wave to control the charging module, provides a stable 3.4 V DC voltage to the load, and solve the problem of easy saturating of core. The power supply based on this kind of draw-out power coil has undergone the overall testing, and it is verified-showing that it can properly work in a non-saturated status within the current range of 50 - 1000 A, and provide a stable output. The equipment also design protection circuit to improve the reliability to avid the impacts of the impulse current or short-circuit current. It effectively solves the problem of power supply for On-line Monitoring System of Transmission.

Development of Intellectual Negative Pressure Aspirator

Along with the development of biomedical ergigineering, negative pressure aspirator is more and more widely applied in clinical treatment and patients rescuing. The study of negative pressure aspi- rator is an important goal pursued in emergency treatment, became it can boost aid success. Given this need, this device based on MXT8051 single-chip is developed. The device can use Pulse Width Modulation （PWM） signal to drive the motor of negative pressure pump and it can adjust the motor＇s speed through the Proportional In- tegral Derivative （PID） algorithm to realize the setting negative pressure rapidly, aoctarately and stably. The control requiroemnt is accomplishedthrough the nmn-machine interface. This device has the advantage of simple operation, low cost and good practicability.

Smart Resistance Thermometer Sensor Based on C8051F350

A Smart resistance thermometer sensor is designed to overcome the shortages of the traditional ones, and Con-form to the world development trend of the sensor market.According to the constitutions of this Smart sensor and its application coverage,those parts with good -application and low-cost were chosen to constitute this sensor on the basis of full consideration of the linkage among every part.The whole testing system were controlled and processed by C8051F350 single-chip,it could measure precise temperature by PT100 resistance thermometer and circumstance temperature for temperature compensating automatically and simultane-ously,it also could amplify signals to convert analog signals to digital ones,and display results automatically by analysing and processing information.Furthermore,it could auto-compensate self-check,and spot communicate.

DEVELOPMENT OF CYCLOCONVERTER-IM SYSTEM FOR EXPLOSION-PROOF UNDERGROUND MINE HOIST

A recent developed Cycloconverter-IM haulage drive for underground mining is described in this paper. The control of this system is fully digitized. Six INTEL 8031 single-chip microprocessors are interconnected to perform the functions of motor speed control,cycloconverter firing , fault diagnosis,etc. The implementations of the above functions are illustrated,and also a new method called "slip feedback control" for improving power factor of cycloconverter is put forward in this paper.

Noise Characteristics of a High Dynamic Range Camera with Four-Chip Optical System

HDR （high dynamic range） imaging has recently been applied to video systems, including the next-generation UHDTV （ultrahigh definition television） format. This format requires a camera with a dynamic range of over 15 f-stops and a signal to noise SN-ratio that is the same as that of HDTV systems. However, current UHDTV cameras cannot satisfy these conditions. We proposed a four-chip capturing method that combines three-chip and single-chip systems. A prism divides incident light into two rays. Most of the incident light is directed to the three-chip capturing block; the remainder is directed to a single-chip capturing block, avoiding saturation. High quality HDR video can then be obtained by synthesizing the images obtained from the two systems. In this paper, we detail this image synthesis method, and analyze the differences between the three-chip and single-chip capturing systems. In particular, we focus on noise analysis of the single chip system. Most of the noises do not affect to image quality but those at around the switching point degrade the visual picture quality. To improve the degradation we propose a new switching method for smooth matching between different noise characteristics of the two systems. Finally, we discuss the results of a simulation used to verify its effectiveness.

System design of touch type DC motor

This paper focuses on the use of the touchpad （key）, STC89C51RC monolithic integrated circuit PWM control signal, which changed the traditional mechanical buttons as a DC motor rotational speed and steering control method. Touch switch advantages compared with the traditional mechanical switches are： first, the quieter second, more sensitive; third, faster; four, long life and so on. Specialized chips are also used in the article the PWM signal system, and the principle of PWM signal, method and how the software adjust the duty cycle of the PWM signal to control its input signal waveforms are are described in detail. In addition, this article also introduced consisting of triode amplifier circuit of h-bridge amplifier as a DC motor driving module, enabling the control of DC motor speed. On the software side, PI was described in detail in the article arithmetic program initializes write ideas and specific programs such as program implementation.

塞棒控制自动拉钢控制系统在R9米连铸机的应用

石横特钢二炼钢车间现有四机四流R9米连铸机一座,优钢的开发和生产全靠塞棒控制系统提供稳定的液面及恒拉速,从而保证钢水形成钢坯的质量,对提高铸坯质量起到一定的作用,在目前工业自动控制系统中,可编程逻辑微处理器(SC3000-PID)、探测器(HN-DET-D51/290-M2)、驱动器(SCDK-S5)作为常用的成熟现场控制设备,上位机作为数据采集系统已经得到广泛使用。通过检测液面,传输到微处理器进行换算,PLC模块控制驱动器直接控制电动缸微动作,实现闭环控制,从而得到高精度的钢水液面。