目的 解决目前卷烟纸搭口胶施胶量检测方法为离线检测、施胶量小、检测难度大、效率不高的问题。方法 设计2种搭口胶施胶量在线检测方法，分别为激光传感器法和外夹式超声波流量计法，均通过测量某段时间内消耗的胶液质量以及生产的产品总数，得出单个产品的搭口胶施胶量。其中，激光传感器法主要通过测量皮带轮的转动圈数，结合皮带轮转动一圈输出的胶液质量计算总的胶液质量;外夹式超声波流量计法主要通过测量胶管内搭口胶的累积流量，进而计算胶液质量。结果 为验证2种方法的可行性，同时采用传统胶枪出胶量法、激光传感器法、超声波流量计法测量1.0、1.5、2.0 mg/支的搭口胶施胶量。由检测结果可知，在不同搭口胶施胶量下，激光传感器法的最大相对误差均小于外夹式超声波流量计法。结论 激光传感器法、超声波流量计法均满足1.0~2.0 mg/支的产品搭口胶施胶量在线检测需求，激光传感器法的测量准确度更高，外夹式超声波流量计法更便于安装使用。

The work aims to solve the offline detection, small sizing amount, difficult detection and low efficiency in current test method of cigarette paper overlap sizing amount. Two online detection methods for lap adhesive sizing amount were designed, namely the laser sensor method and the external clamp ultrasonic flowmeter method. Both methods calculated the sizing amount per product by measuring the total mass of glue consumed and the total number of products produced within a certain period of time. Among them, the laser sensor method mainly measured the number of rotations of the pulley and calculate the total sizing amount based on the mass of adhesive output per rotation of the pulley; The external clamp ultrasonic flowmeter method mainly measured the cumulative flow of adhesive in the adhesive pipe and then calculated the sizing amount. To verify the feasibility of the two methods, the traditional glue gun adhesive output method, the laser sensor method, and the ultrasonic flowmeter method were used to measure the lap adhesive sizing amount of 1.0, 1.5, and 2.0 mg per cigarette. The detection results showed that under different lap adhesive sizing amount, the maximum relative error of the laser sensor method was smaller than that of the external clamp ultrasonic flowmeter method. Both the laser sensor method and the ultrasonic flowmeter method meet the online detection requirements for the lap adhesive sizing amount of 1.0 to 2.0 mg per cigarette. The laser sensor method has higher measurement accuracy, while the external clamp ultrasonic flowmeter method is more convenient for installation and use.