定量给料皮带秤控制器软件设计_毕业设计论文中英文翻译(编辑修改稿)

定量给料皮带秤控制器软件设计_毕业设计论文中英文翻译(编辑修改稿)内容摘要：

tension automatic adjustment device, transmission and speed reducer, motor, belt。 detection circuit and device mainly prises: weighing sensor and its circuit, speed sensor and its circuit. The controller includes chip and MCU to realize some of the features needed auxiliary circuit, such as a A/D conversion circuit, the expansion of the circuit, the watchdog circuit. After the power is applied, the motor drives the belt begins to rotate, microprocessor according to current operating control motor speed, through a chain drive roller so that the belt running. Materials in the hopper fall on the blanking zone, through a belt delivery to the weighing zone, its weight through belt weigher body delivered to the weighing sensor, the sensor generates a forceelectricity effect, the object39。 s weight is converted into known weight of objects with certain functional relationship between ( generally proportional to the relationship of signal ( voltage ) or current ). The signals are amplified by the amplifying circuit, the filter and then by a / D ( A/D ) for the conversion of digital signals, and then sent to the microprocessor CPU, CPU constantly scan the keyboard and various function switch, according to the 10 keyboard input and various functions of switch state the necessary judgment, analysis, instrumentation software to control various operations. Results of operations to the memory storage device, display, CPU sends an instruction from memory, read to a display, or send the printer to print, at the same time it can according to the operator on the numeric keypad input given value by changing the control of motor speed to achieve the corresponding change of belt transmission speed, which can quickly and easily the realization of industrial control in what people need belt speed. General signal amplification, filtering, A/D conversion and signal processing in various instrument pleted. The microcontroller technology and the development of sensor technology and the wide application of puter technology, electronic product updates speed to change rapidly. In the system design process, in addition to the realization of the basic functions of the system, but also increases the print and munication function, can be achieved and the other machines or equipment ( including the upper PC and a data storage device ) to exchange data. In addition, the system microcontroller section selects the patibility better AT89Series MCU in the system, update time, requires only a little increase of hardware circuit, even just modify system control procedures can be achieved. In addition the, called can have on the practical application of volume overload, but not beyond the scope of the. To sum up, the system39。 s main design idea is : the use of pressure sensors for pressure changes produced by the voltage signal, after the voltage amplifying circuit, and then after analog to digital converter for converting the digital signal, the digital signal into the microcontroller. Single chip microputer after corresponding treatment, reach current referred to the weight of goods, and then displayed. At the same time, according to the operation personnel to the set value, SCM through regulate the speed of the motor to the belt speed corresponding adjustment, in order to work when people want the belt speed. This system is posed of 5 parts: control, measurement, data display, the keyboard part part part part, and power supply circuit. Measuring portion is utilized for weighing sensors to detect the pressure signal, get weak electrical signals ( the design into a voltage signal ), and then through the processing circuit ( such as filter circuit, differential amplifier, ) after treatment, send A/D converter, analog quantities are converted into digital quantity output. The controller portion for receiving from the A/D converter output digital signal, through plex algorithms, the digital signal 11 is converted to objects in the actual weight signal, and stores it in the storage unit. At the same time controller can also accept from the keyboard input of the digital speed numerical order, after the controller corresponding software processing, instruction signal through the I\O port into the thyristor power control circuit, thyristor power control circuit in accordance with the instructions of regulate the speed of the motor, and the motor speed control of belt transmission speed also change accordingly. The controller can also based on extended I/O control, keyboard scan, and then through the keyboard to disperse transfer procedure, to control the whole system data display part according to needs to realize the display function. This system requires the use of single chip puter as the system as the main controller, and the controller based on single chip design, can easily be the puter technology and measurement and control technology are bined together to form a novel, only need to change the software program can update the intelligent measurement and control system. This new type of intelligent instrument in measuring process automation, measurement data processing, control the process convenient and functional diversification, have made tremendous progress. According to the overall design analysis, can be used with EEPROM SCM, because the application is not big, the application directly stored in the chip, not in the external extended memory, so that the circuit can be simplified. Intel39。 s 8051and 8751can be used, here choose ATMENL production AT89CXX series mcu. AT89CXX has two advantages: first, sheet memory storage device with flash memory, so that the writing program more convenient。 second, with a smaller size of the chip, so that the hardware circuit is smaller in volume, and low prices stable performance parison of MCPU,8K 8ROM,256 8RAM,2of 16timer counter,4a8 I/。