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05-灰分在线检测系统 Online Detection System of the Ash Content


系统简介(System Introduction )
  系统主要由灰分传感器和定量传感器及水分传感器相结合,准确测量纸张中灰份的精确含量。灰分传感器由一个X射线源,一个快门和探测器组成。
  The system is consisted of the ash content sensor, ration sensor and moisture sensor. It can accurately measure the accurate ash content in the paper. The ash content sensor is consisted of an X radiation source, a shutter and detector.


  测量源组件由一个带特别设计稳定化电路的高流量射线管,一个稳定化的高压电源,一个射线管电流控制板组成,高流量X射线源组件确保了测量的精度和快速性。
  The measurement source component is consisted of a ray tube with dedicatedly designed stable circuit and high flow capacity, a stable high voltage power and ray tube current control panel. The X radiation source component with high flow capacity ensures the accuracy and rapidity of the measurement.


  探测器由一个充满惰性气体氪的离子室和适当的校准装置组成。测量源和探测器特殊的一体化几何结构消除了它对纸张抖动的敏感性。
  The detector is consisted of an ion chamber full of krypton which is inert gas and appropriate calibration device. The special integrated geometric structure of the measurement source and detector eliminates its sensitivity to the paper vibration.


  优先吸收X射线的特性是灰份传感器测量准确度的关键。对于能量一定的X射线,不同的物质会表现出不同的吸收特性(例如:灰份比纤维有更强的吸收能力)。
The characteristics of first absorbing the X ray is the key factor of the measurement accuracy of the ash content sensor. For the X ray with fixed energy, different substances have different absorption characteristics (For example, the ash content has higher absorption capacity than the fiber).


  测量源组件所发射的X射线有一定比例会被纸张中的灰份所吸收,没有被吸收的一部分X射线穿过纸张,在探测器的电离室中形成电流信号。该电流信号和进入离子室的X射线的数量成正比。
  A proportion of X rays emitted by the measurement source component will be absorbed by the ash content in the paper and the rest which are not absorbed pass through the paper and form the current signal in the ion chamber of the detector. This current signal is in direct proportional to the X ray entering the ion chamber.


  电离室中形成的电流信号会转换成数字量信号,储存在主机中,在经过定量,曲线温度,水份和其它动态变量的补偿之后,该信号最终转换成灰份测量值。The current signal in the ion   chamber can convert into the digital signal and is stored in the host. After the compensation of the ration, curve temperature, moisture and other dynamic variables, this signal finally converts into the measured ash content value.


·技术指标(Technical Indexes)
-重复性(2个标准差): 绝对灰份读数的0.5%.

Repeatability: (2 standard deviations): 0.5% of the absolute ash content reading;
-准确性(2个标准差): 绝对灰份读数的0.5%.

Accuracy (2 standard deviations): 0.5% of the absolute ash content reading;
-测量范围: 0~35%,至多450GSM.

Measurement range: 0~35% and maximum of 450GSM.
-测量响应速度: 小于10毫秒.

Measurement response speed: less than 10 millisecond;
-最大环境温度: 82℃

Maximum environment temperature: 82









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