一、前言布机上的织物,例如各种棉、毛、麻、化纤等织品的长度计量,一般测量方法是停机后再进行人工度量。这样,既费人力、又费时间,使连续作业的生产效率受到一定影响。本仪器可在布机生产过程实现自动测长、数字显示、定值打印。它不仅适用于诸如一卷布的总长度的连续测长,尤其适用于床单类织物的定值测长。目前,国内有采用机械齿轮或链条传动的方法在布机生产过程中测长。但测量精度和长期工作可靠性不高,而且只适于被测长度值为固定不变的某单一种类的织品。如果被测长度值(例如床单的规格)或被测织物的种类一旦 I. Preface Fabric on the cloth machine, such as the length measurement of all kinds of cotton, wool, hemp, chemical fiber and other fabrics, the general measurement method is manual measurement after downtime. In this way, it takes both manpower and time for the production efficiency of continuous operations to be affected to a certain extent. The instrument in the cloth production process to achieve automatic length measurement, digital display, setting value printing. It not only applies to the continuous measuring length such as the total length of a roll of cloth, and is particularly suitable for measuring the length of a sheet-type fabric. At present, there are domestic methods of using mechanical gear or chain drive in the cloth production process length measurement. However, the measurement accuracy and long-term reliability are not high, and only suitable for a single type of fabric whose measured length is fixed. If the length of the measured value (such as sheet specifications) or type of fabric once measured