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controlled circuit
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    To develop the experiment platform of exoteric style for postgraduates specializing in color sensing, this paper proposes a data acquisition system with a color sensor connected to a single chip computer controlled circuit. It incorporates USB, I C bus for communication, and realizes a virtual instrument for color detection.
    为了研制开发研究生学习色敏传感器用的开放型实验平台,文章设计实现了颜色传感器结合单片机控制的数据采集模块,并结合I2C,USB总线通信技术和虚拟仪器技术,构成一个包含颜色检测模块和颜色生成模块的虚拟仪器系统。
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  controlled circuit
We can compare phase-controlled and PWM-controlled circuit configurations using two criteria.
      
The initial transient winding current versus time for PWM-controlled circuit obtained in simulation.
      
The initial transient winding current versus time for phase-controlled circuit obtained in simulation.
      
Since the advent of solid-state controlled circuit breakers there has been a need for devices to read, program, and test this new technology.
      
Many manufacturers already derive the time base for the AC output from an inexpensive crystal-controlled circuit.
      
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The movement-controlled system of converted-axis telescope used to adopt stepping motor as its power. So the device of the motor is easily damaged and the operation of the longitude and the latitude is rather complicate. In this paper,we adopt direct motor as the main power which is controlled by PWM ratio-controlled circuit. As a result of it,we have gained better achievements.

折轴式天文望远镜的电路控制系统,一般采用步进电机作为动力,辅以相应的控制线路,在实际应用中容易卡死,赤经、赤纬的操作也比较烦琐.我们采用大功率直流电机并辅以比例控制电路,取得较好的效果.

A pulsedlight emitter based on Xe lamp is presented.It is a perfect source for timeresolved fluorescence immune assay(TRFIA).Using a timecontrolled circuit and an energycontrolled circuit,the set can emit high frequency pulsedlight.The frequency is 1 kHz.The wavelength range is from 280 nm to 380 nm,the pulse width is 54 μs,and the output power of ultraviolet radiation is more than 200 μW.

设计了一种能产生高频脉冲光的激发光系统。光源利用特制的高压Xe灯,Xe灯电源设计了时间、能量控制电路,解决了高频脉冲光脉宽较大的问题,使Xe灯能产生稳定的高频短脉冲光,再加上特别设计的石英透镜组,本激发光系统可得到光谱线范围可选的、脉冲宽度54μs和紫外能量大于200μW的1kHz的脉冲光。

The paper introduces a design and usage of transducer and amplifier in waterlevel meter.Firstly the transducer that is connected primarily by a chip with four strain resistance has an advantage of eliminating spurious signals automatically caused by change of temperature.Then,the sensibility of transducer is raised.Secondly the control circuit has an ability to restrain disturbance greatly from outercircumstance because it used the inphrase amplifiers with high input impedance and combined with inseries...

The paper introduces a design and usage of transducer and amplifier in waterlevel meter.Firstly the transducer that is connected primarily by a chip with four strain resistance has an advantage of eliminating spurious signals automatically caused by change of temperature.Then,the sensibility of transducer is raised.Secondly the control circuit has an ability to restrain disturbance greatly from outercircumstance because it used the inphrase amplifiers with high input impedance and combined with inseries differential amplifier.Consequentially,a high commonmode ratio is caused by the combined control circuit.At the same time,the designing method of combined and controlled circuit based on CYG13B transducer and integrated amplifier was offered.Finally the new device that our watermeasuring meter has is superior in reliability and stability.

 对DGN-1型流量计中传感器部分进行了重新设计,传感器压阻芯片采用全桥对称形式,完成自动温度补偿,消除因热形变应力而产生的漂移电压信号,提高了传感器的灵敏度;控制电路采用高输入阻抗的同相放大器并串联高共模抑制能力的差动放大器,该测量电路具有较强的抑制共模干扰的能力。同时,给出了CYG13B传感器与集成运算放大器组合控制电路的一种设计方法,其优点是仪表从采集信号到信号放大均有较好的抗干扰性能,使整机性能在可靠性、稳定性方面有较好的改善。

 
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