A new way of distance measurement is introduced in this paper, it is similar to traditional measurement way, and has its origination. In the new measurement way, the rough measurement of the distance is realized by countering high frequency pulses filled in discriminable phase pulses. Discriminable phase pulses go through integral circuits, and then are sampled by Analogue Digital Converter, so the accurate measurement of the system is obtained by the sampling value.
本文提出了一种新的测距方法，该方法与常规相位测距仪比较，既有相似之处也有其创新之处，常规相位测距仪一般使用多波长测尺频率组合、差频数字测相的方法，本系统虽然也采用多波长测尺频率组合，但并不采用差频数字测相，该方法摒弃了传统的内外光路的切换方式及电路的混频，粗测采用对鉴相脉冲填充高频脉冲的办法实现，精测则利用鉴相脉冲对积分电路进行积分，然后由ADC 对积分电平进行转换，通过对ADC 的输出值的计算处理实现精测。
The AD9726 in series of ADI company TxDAC is a 16 Bit, 400 MSPS send digital-to-analogue converter, the coaxial cable that it can undertake modulation to 384 frequency passageway and sends MDU interior network.
ADI公司TxDAC系列中的AD9726是一款16 bit、400 MSPS的发送数模转换器，它能够对384个音频通道进行调制并发送到MDU内部的同轴电缆收集。
A signal level adjustment circuit receives the low frequency signal and an analogue to digital converter (370), operably coupled to the signal level adjustment circuit receives an adjusted low frequency signal and providing a digital received signal.
信号电平调整电路接收低频信号，以及可操作的连接到信号电平调整电路的模拟到数字转换器(370)接收调整的低频信号，并提供数字接收信号。
After the analyses of circuit theory of analogue voltage-to-frequency ratio converter, the design requirement of component parameters and the calculation method are presented.
分析了模拟电压一频率比变换电路原理，给出了元件参数的设计要求及其计算方法。
Analogue voltage - to - frequency ratio converter in weighing system
称重系统模拟电压&频率比变换电路
The simple and common mode of obtaining line speed is chosen to calculate the diameter of the roll in the rolling-up process, the running frequency of analogue output signal of the driving converter controlling the speed of the system is used as the line speed signal namely.
收卷过程中卷径计算选用最简单、最常用的线速度获取方式，即用控制系统速度的驱动级的变频器（艾默生TD3000）运行频率模拟输出信号作为线速度信号。