<p>
随着智能网联汽车的快速普及,车载显示屏已从单一的信息展示载体,升级为集导航、娱乐、车辆控制、驾驶辅助等功能于一体的核心人机交互终端。点触控作为车载显示屏最主流的操作方式,其在多任务并发场景下的稳定性、准确性与实时性,直接关系到行车安全与用户体验。在行业标准化进程中,常有从业者提及“车载显示屏点触控并发测试依据GB/T 35133-2017”,但事实上,该标准存在明确的适用范围界定,需先厘清认知,再结合车载触控测试的核心需求,依托正确的标准体系开展测试工作。
</p>
<h2 class="heading-2 ace-line old-record-id-Tsc6fcvSpdTN9dcwYQGcBw57nzc">
一、厘清认知:GB/T 35133-2017的实际适用范围
</h2>
<p>
经国家标准化管理委员会官方信息确认,GB/T 35133-2017的正式名称为《集团企业经营管理参考模型》,其核心内容界定了集团企业经营管理参考模型的体系框架,规范了集团管控的业务目标、范围、管控模式及核心业务管理参考模型,适用于制造业的管理流程重构、软件模块化定义,以及管理信息化产品的开发设计指导,与车载显示屏、点触控测试无任何直接关联。
</p>
<p>
为何会出现标准混淆?推测主要源于两方面:一是部分检测机构在宣传中,误将该标准与智能终端、显示设备的可靠性测试关联(如部分场景中将其用于投影幕布、人脸识别终端的测试宣传),导致信息传递偏差;二是车载显示触控领域存在多项专用标准,从业者易因标准号相似、记忆偏差,将非相关标准误作参考依据。对于车载显示屏点触控并发测试,真正具备指导意义的是车载显示专用标准及触控设备通用标准,如GB 26149《汽车用液晶显示器》、GB/T 26247-2010《信息技术 触控设备通用规范》等。
</p>
<h2 class="heading-2 ace-line old-record-id-CKDafLz3ldrkJkcoDEFcv05enYd">
二、车载显示屏点触控并发测试的核心意义与应用场景
</h2>
<p>
车载场景与消费电子场景存在本质差异,行车过程中的振动、高低温、电磁干扰,以及驾驶员“盲操作”“快速切换操作”的需求,对车载显示屏的点触控并发性能提出了严苛要求。点触控并发测试,本质是模拟多用户、多任务同时操作的场景,验证显示屏在多个触控点同步输入时的响应能力,核心目的是规避两类风险:一是并发操作时的误触、漏触、触控延迟,避免驾驶员因操作失效分心,引发行车安全隐患;二是长期并发操作后的性能衰减,确保显示屏在整车生命周期内稳定发挥交互功能。
</p>
<p>
结合实际车载场景,点触控并发测试的典型应用场景主要包括三类:其一,基础并发操作,如驾驶员操作导航的同时,副驾驶调节空调风量,即两个触控点同步输入的简单并发;其二,复杂手势并发,如驾驶员双指缩放导航地图的同时,点击屏幕切换音乐,涉及多点触控与单点触控的协同并发;其三,极端环境下的并发验证,如在-30℃低温或85℃高温环境中,同步进行导航缩放、音量调节、电话接听等多项操作,验证环境因素对并发触控性能的影响。
</p>
<p>
相较于消费电子显示屏,车载显示屏的点触控并发测试更强调“安全冗余”——消费电子允许偶尔的触控延迟或误触,但若车载显示屏在并发操作中出现100ms以上的延迟,或误触率超过0.5%,就可能引发严重安全事故。因此,该测试已成为车载显示屏量产前的核心检测项目,也是整车厂商供应链准入的关键考核指标之一。
</p>
<h2 class="heading-2 ace-line old-record-id-WponfUv3jdXW5ycJxKTcpgWQnig">
三、车载显示屏点触控并发测试的核心指标与测试方法(结合专用标准要求)
</h2>
<p>
结合GB 26149《汽车用液晶显示器》、GB/T 26247-2010《信息技术 触控设备通用规范》及行业实践,车载显示屏点触控并发测试需围绕“准确性、实时性、稳定性、抗干扰性”四大核心维度展开,明确测试指标、测试环境与测试流程,确保测试结果具备客观性与可重复性。
</p>
<h3 class="heading-3 ace-line old-record-id-GldQfJNwjdnddhcsY7hcx5QknMc">
(一)核心测试指标
</h3>
<p>
车载显示屏点触控并发测试的指标设定,需充分贴合车载场景的特殊性,核心指标包括以下5项,均参考车载专用标准及行业共识确定:
</p>
<ol start="1" class="list-number1 list-paddingleft-2">
<li>
<p>
并发触控准确率:多触控点同步输入时,显示屏正确识别触控指令的概率,标准要求不低于98%,核心操作(如空调调节、紧急呼叫)的准确率需达到100%,避免因误识别导致操作失效,这与车载交互的安全性要求高度匹配。
</p>
</li>
<li>
<p>
并发响应时间:从多个触控点同步触发操作,到显示屏呈现响应结果的时间,标准要求不超过100ms,盲操作场景下需控制在80ms以内,确保驾驶员操作后能快速获得反馈,减少操作分心时间。
</p>
</li>
<li>
<p>
并发触控点数:显示屏可稳定识别的同步触控点数量,结合车载操作场景,标准要求至少支持5点并发,高端车载屏(如座舱域控集成屏)需支持10点及以上并发,满足多手势协同操作需求,且各触控点间距不小于15mm时需能准确识别,避免多点干扰。
</p>
</li>
<li>
<p>
并发稳定性:在连续1000次并发操作循环中,无卡顿、无漏触、无误触,触控精度偏差不超过初始值的10%;长期测试(如10万次循环)后,性能衰减不超过15%,确保显示屏长期稳定工作,契合整车使用寿命要求。
</p>
</li>
<li>
<p>
抗干扰并发性能:在车载典型干扰环境(如电磁辐射、车辆振动、强光照射)下,并发触控准确率仍需不低于95%,响应时间波动不超过20ms,避免环境因素影响触控并发性能,这是车载场景区别于消费电子场景的关键指标之一。
</p>
</li>
</ol>
<h3 class="heading-3 ace-line old-record-id-Rv0nf1nHKdtJ6wcZcRIcI1Mknnd">
(二)测试环境与设备
</h3>
<p>
测试环境需模拟真实车载工况,避免实验室理想环境与实际使用场景的性能偏差,核心环境与设备要求如下:
</p>
<ol start="1" class="list-number1 list-paddingleft-2">
<li>
<p>
测试环境:温度控制在-30℃~85℃(覆盖车载极端高低温场景),湿度30%~90%RH,振动频率10Hz~500Hz(模拟车辆行驶中的振动),光照强度1000lux~100000lux(模拟强光直射与弱光环境);同时模拟60dB车内噪音环境(高速行驶场景),验证噪音对触控识别无间接影响,确保测试环境贴合实际车载工况。
</p>
</li>
<li>
<p>
测试设备:采用专业多点触控测试系统,支持1~20点可调并发触控,定位精度≤0.1mm,可精准模拟双指缩放、多点点击等车载典型并发操作;配备电磁干扰模拟器、高低温试验箱、振动试验台,用于模拟车载干扰环境;搭配数据采集仪,实时记录并发触控的响应时间、准确率、偏差值等数据,确保测试数据可追溯、可分析;部分高端测试场景可采用FPGA芯片搭建触控仿真测试系统,降低响应延迟,提高测试精度与稳定性,解决传统机械臂测试方案的惯性与精度缺陷。
</p>
</li>
</ol>
<h3 class="heading-3 ace-line old-record-id-OGjufVr5addEiVcPPIfcSHqYncg">
(三)测试流程
</h3>
<p>
为确保测试结果的规范性与可重复性,结合车载显示测试行业规范,点触控并发测试需遵循以下标准化流程:
</p>
<ol start="1" class="list-number1 list-paddingleft-2">
<li>
<p>
测试准备:将被测车载显示屏接入整车电源模拟系统,调节至正常工作状态;将显示屏固定在振动试验台上,设置测试环境参数(温度、湿度、振动频率、光照强度),稳定30分钟,确保显示屏适应测试环境,避免环境突变影响测试结果;同时校准触控测试设备,确保定位精度与响应时间测量精度符合要求,搭建完善的测试数据采集体系。
</p>
</li>
<li>
<p>
参数设置:根据被测显示屏的规格(如尺寸、触控点数),设置并发触控点数(从2点逐步递增至最大支持点数)、并发操作类型(多点点击、双指缩放、混合并发等),设定测试循环次数(至少1000次,长期稳定性测试需10万次),明确准确率、响应时间的判定阈值,贴合车载专用标准要求与产品设计规格。
</p>
</li>
<li>
<p>
测试执行:启动测试系统,模拟车载典型并发操作场景,同步记录各项测试数据;在测试过程中,逐步切换极端环境参数(如从常温切换至低温、开启电磁干扰),观察并发触控性能的变化,重点记录干扰环境下的性能衰减情况;采用FPGA触控仿真测试方案时,通过上位机发送模拟触控指令,解析触控参数并上传,同步采集车机域控的响应数据,实现全流程自动化测试与数据监控,提升测试效率与数据准确性。
</p>
</li>
<li>
<p>
结果判定与分析:测试结束后,整理并发触控准确率、响应时间、稳定性、抗干扰性能等数据,与标准阈值对比,判定产品是否合格;对不合格项目(如并发误触率超标、响应延迟)进行根源分析,排查触控IC、软件算法、硬件结构等方面的问题,形成测试报告与优化建议;同时结合统计过程控制(SPC)方法,分析性能变化趋势,识别潜在的性能衰减风险,为产品优化提供数据支撑,契合车载产品高可靠性要求。
</p>
</li>
</ol>
<h2 class="heading-2 ace-line old-record-id-HLVMfNaZPd26nOcAtcLcVXRPnuc">
四、标准体系完善与行业发展趋势
</h2>
<p>
当前,车载显示屏正朝着大屏化、多屏化、一体化(座舱屏)的方向发展,点触控并发场景日益复杂,对并发性能的要求也不断提升——例如,座舱域控集成屏需支持驾驶员、副驾驶、后排乘客的同步触控操作,并发点数需求提升至10点以上,且需兼顾不同位置触控的准确性与实时性,这对测试标准与测试技术提出了新的挑战。
</p>
<p>
此前的标准混淆问题,也反映出车载显示触控领域标准化认知的不足。未来,行业需进一步明确各类标准的适用范围,避免信息偏差:GB/T 35133-2017应回归其集团企业经营管理的核心定位,而车载显示屏点触控测试需以GB 26149、GB/T 26247-2010等专用标准为核心,结合ISO 9241-410等国际标准,完善测试指标与测试方法,填补座舱屏并发测试、极端环境并发测试等领域的标准空白,推动测试流程的规范化、统一化,解决不同检测机构测试方法不一致、结果不可比的问题。
</p>
<p>
在测试技术层面,将逐步淘汰传统的机械臂测试方案,推广基于FPGA芯片的触控仿真测试技术,实现更高精度、更低延迟的并发测试,可精准模拟高频点击、快速滑动等复杂并发场景,覆盖全场景触控测试需求;同时,结合人工智能技术,实现测试数据的自动化分析与异常预警,提升测试效率与问题排查能力,缩短产品研发与量产周期,契合汽车智能化的发展节奏。
</p>
<h2 class="heading-2 ace-line old-record-id-I5yIfIuyYdzYluccUN1cTSrynNf">
五、结语
</h2>
<p>
车载显示屏点触控并发测试,是保障车载人机交互安全、提升用户体验的关键环节,其测试工作的规范性、专业性,直接关系到智能网联汽车的产品竞争力与行车安全。需明确的是,GB/T 35133-2017并非车载显示屏点触控并发测试的参考标准,从业者应厘清标准认知,依托GB 26149等车载专用标准,建立科学、完善的测试体系。
</p>
<p>
随着汽车智能化的不断深入,车载显示屏的触控并发场景将更加复杂,测试标准与测试技术也将持续升级。唯有坚守标准化测试理念,精准把控并发测试的核心指标,不断优化测试方法,才能推动车载显示屏产品性能的提升,为智能网联汽车的安全、高效发展筑牢人机交互的“第一道防线”,助力车载显示产业朝着更安全、更智能、更可靠的方向发展。
</p>
<p>
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