二千一百三十四章 夸张的新一代激光雷达技术
“比如,我们提升了自动驾驶系统所搭载探测传感器的精度。首先,我们在原有的激光雷达基础上进行了提升,使其激光雷达测距距离极大的得到了延长。
大家知道,探测距离的远近直接影响着系统对于障碍物的识别预警的反应应对时间。探测距离越长,所能够探测到的数据信息也就越多,这有利于提升整体安全性。
除此之外,探测距离越长,就意味着可以极大的提升车辆的形式速度。过去,可能受限于探测技术,自动驾驶汽车都必须控制在一个速度范围之内,超过这个速度,自动驾驶系统就会自动退出,让驾驶人员来接管。
而我们的新一代激光雷达,就能够探测更远的距离,基本上是目前市面上这些激光雷达探测距离的三到四倍。这也意味着,我们的自动驾驶系统就可以在几百米外探测到前方可能出现的障碍物,从而提早的进行规划,而不至于到了跟前临时反应。
同时呢,也意味着在新一代激光雷达加持下的自动驾驶技术,可以运用到速度更快的车辆上面,又或者是其它交通工具上面。比如高铁,它的速度能够达到三百五十公里,甚至有一些能够达到四百公里。如此快的速度,留给驾驶员反映的时间非常短。如果能够将这套系统得以应用,那么高铁在高速行驶中对于前方路况的探测就更加准确,反应更加迅速了。这有利于减少因为人受限于各种条件反应太慢,而出现的一些事故和问题。”
讲到这里,周永辉换了口气,然后接着讲道:“除了探测距离外,激光雷达的扫描频率和探测分辨率也是衡量激光雷达好坏的根本。
而这一次,我们在这两=方面下了很大的功夫,让这两方面的性能得到了很大的提升。
所谓扫描频率是指在一个时间内对同同一个物体或者周围环境的探测速度。扫描评率越高,就意味着激光雷达探测获知周围环境信息就越细致,越及时,能够实时探测到周围环境中的细小变化。
扫描频率的差异可能在低速过程中没有太大的区别,但是在高速和超高速环境中,扫描频率就至关重要了。扫描频率越高,对于高速运动物体探测就越详细,这样就能够获知周围更加详细的高速运动物体的状体,从而告诉自动驾驶系统来进行处理,进行避让。
至于探测分辨率,是指激光雷达对于微小物体的探测能力。
有一点大家大家应该知道,激光雷达所探测到的物体并非是我们所看到的那样,而是点阵云。通过物体轮廓表面与激光雷达的距离远近,就能够获知物体轮廓外形。
探测分辨率越高,就代表着我们所能够获知探测到的物体轮廓就越详细。
目前的市面上的激光雷达技术,对于近距离目标能够实现很高的测距分辨率,但其分辨率亦会随着探测物体距离增加而剧烈下降。
因此为了实现更远距离的探测,就不只是增加激光器功率这么简单了,需要对于测距核心有本质的改良。
市面上这些激光雷达产品,在对于远距离目标和环境的探测分辨率很低,这会给车辆行驶中带来一些问题。
而我们新一代激光雷达呢,在探测分辨率上面得到了极大的提升,它的百米探测精度能够达到厘米级别。什么意思呢,也就是说,我们能够在百米的距离,识别出地上的一个小坑,或者掉落的一枚铁钉,从而提前进行避让。”
这也太夸张了吧。听到周永辉的介绍,现场有人不由的惊叹道。
呵呵,吴浩他们闻言笑了笑,的确对于这么高的探测精度,有些吃惊。
“是有点夸张,但这就是我们实实在在试验出来的成绩,没有半点掺假。而且探测的精度很高,我们所探测到的目标物体大小轮廓,与实际物体的大小轮廓基本保持一致,没有出现偏差。”周永辉笑着应道。
讲完这些,周永辉望了吴浩一眼,然后接着讲道:“出来提高新一代激光雷达的性能,我们还极大的提升了新一代激光雷达的抗干扰性。
尤其是在对于不同颜色物体的探测检出率,以及对于环境光和其它光线的抗干扰性,都有很大的提升。
激光雷达的探测原来,是利用光线发射撞到被测物体,反射回来接受从而去回之间的时间,从而得出激光雷达到探测物体之间的距离,然后通过无数条光线就能够获知前方物体的大小沦落信息了。
那么这就带来了一个新的问题,大家都知道,不同颜色,不同材质物体的光线反射率不同,所以得到的探测数值自然也就极大的不同了。
就比如深色物体,它不同于白色物体具有很高的反光率,深色物体能够吸收绝大部分光能力,想让激光雷达对深色物体与白色物体有一样的检测力显然是不现实的。
所以如何平衡不同颜色,不同材质物体直接的探测差异,如果消减深色物体对于激光雷达探测所带来的影响,这也是我们一直以来研究的重点。
好在皇天不负有心人,在经过我们不断的研究和优化,最终我们通过改进传感器技术,光学调节,以及优化处理算法等技术,使得我们在这方面的性能得到了非常大的提升。就但从这一点,我们可以完胜市面上的一种激光雷达产品。
除此之外,还有环境光的抗干扰性,这也是我们研究的重点。
激光雷达就是利用光线来探测物体,所以自然会受到其它光线的影响。比如直射的阳光,人造灯光,以及其它的一些环境光,都将会对激光雷达的探测性能产生影响。
因此在这方面,我们也下了很大的功夫,一方面改进激光雷达中的激光光源,让它能够尽可能的区别于自然光。另外一方面呢,则是通过智能处理算法来进行计算,过滤掉除激光雷达外的其它光源噪点,让获得的激光探测数据更加清晰准确。”
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