线结构光传感器测量特性的测试分析  

Test and analysis of measurement characteristics of line structured light sensor

作　　者：刘艺 孙衍强[1] 石照耀[1] 于渤[1] LIU Yi;SUN Yan-qiang;SHI Zhao-yao;YU Bo(Beijing Engineering Research Center of Precision Measurement Technology and Instruments,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学北京市精密测控技术与仪器工程技术研究中心,北京100124

出　　处：《机电工程》2022年第12期1740-1746,共7页Journal of Mechanical & Electrical Engineering

基　　金：国家重点研发计划项目(2018YFB2001400)。

摘　　要：为了揭示线结构光传感器在各种因素影响下的测量特性,以线结构光传感器为测试对象,设计了一种测试平台,研究传感器的内部因素和外部因素对线结构光传感器测量特性的影响规律。首先,根据线结构光传感器的工作原理,分析了影响其测量特性的因素,确定了测试项目;然后,根据测试需求,构建了线结构光传感器的测试平台;最后,使用两款不同厂家的传感器进行了测试,在测试平台上针对两款传感器的内部因素(内部温度、测量区域位置、曝光时间)和外部因素(测量物体性质、环境光强)进行了测试,通过分析获得了不同因素对线结构光传感器测量特性的影响情况。研究结果表明:线结构光传感器的测量结果与内部温度变化呈正相关趋势,开机至达到稳定状态需要约1 h;传感器测量区域不同位置的稳定性存在差异,X方向上中间区域稳定性优于两端;曝光时间决定了测量结果的稳定性和可靠性;线结构光传感器无法稳定测量强透光性物体;环境光强对测量结果的影响可忽略不计。In order to reveal the measurement characteristics of line structured light sensor under the influence of various factors,line structured light sensor was used as the test object,a test platform was designed to study the influence of the internal and external factors of the sensor on the measurement characteristics of the wire-structured light sensor.Firstly,according to the working principle of line structured light sensor,the factors affecting the measurement characteristics were analyzed and the test items were determined.Then,according to the test requirements,the test platform of the linear structured light sensor was constructed.Finally,two sensors from different manufacturers were used for testing,the internal factors(internal temperature,measurement area position,exposure time)and external factors(measurement object properties,ambient light intensity)of the two sensors were tested on the test platform.Through the analysis,the effects of different factors on the measurement characteristics of the line structured light sensor were obtained.The research results show that the change of the measurement result of the line structured light sensor has a positive correlation trend with the change of the internal temperature,and it takes about 1 hour to reach a stable state after starting up.The stability of different positions of the sensor measurement area is different,and the stability of the middle area in the X direction is better than that of both ends.The exposure time determines the stability and reliability of the measurement results.Line structured light sensor cannot stably measure objects with strong light transmittance.The influence of ambient light intensity on the measurement results can be ignored.

关 键 词：光学计量仪器 线结构光测量技术 内部温度 测量区域位置 曝光时间 测量物体性质 环境光强 

分 类 号：TH741[机械工程—光学工程] TP212[机械工程—仪器科学与技术]