基于Core系列第三代主機(jī)CoreS3的汽車(chē)駕駛評(píng)分器方案

一、項(xiàng)目名稱(chēng)：汽車(chē)駕駛評(píng)分器

作者：aramy

二、項(xiàng)目概述：

公司有公用的維護(hù)車(chē)，每個(gè)員工開(kāi)車(chē)習(xí)慣都不同，但是行車(chē)安全最重要。制作了“汽車(chē)駕駛評(píng)分器”這個(gè)項(xiàng)目，用來(lái)監(jiān)督記錄每次行車(chē)狀態(tài)數(shù)據(jù)。出現(xiàn)危險(xiǎn)駕駛行為進(jìn)行扣分。

項(xiàng)目硬件使用CoreS3。是一個(gè)M5Stack 推出的基于樂(lè)鑫 ESP32-S3 開(kāi)發(fā)的 Core 系列第三代主機(jī) CoreS3，集成了多個(gè)傳感器，其中包括這次項(xiàng)目使用到的加速度傳感器、SD卡和2.0寸的觸摸屏。另外添加了一個(gè)GROVE - GPS (AIR530)模塊，使用GPS+北斗來(lái)進(jìn)行定位。

1、主要框架：系統(tǒng)主要分為3個(gè)部分。

第一部分，收集傳感器信息。GPS+北斗定位信息和加速度傳感器信息。

GPS+北斗定位信息，用來(lái)獲得當(dāng)前車(chē)輛的詳細(xì)位置和速度。有想過(guò)將交通地圖集成到系統(tǒng)中去，但是能力有限，沒(méi)能實(shí)現(xiàn)。定位信息結(jié)合交通地圖就能獲得不同道路的限速信息，從而實(shí)現(xiàn)對(duì)不同道路的限速評(píng)分管理，但是這個(gè)功能暫時(shí)沒(méi)有能夠?qū)崿F(xiàn)。所以對(duì)速度的評(píng)分，僅僅實(shí)現(xiàn)了最高速的扣分（當(dāng)時(shí)速超過(guò)120公里/小時(shí)則扣分）。加速度傳感器用來(lái)收集車(chē)輛加減速和轉(zhuǎn)彎時(shí)的加速度信息。設(shè)定了閾值，當(dāng)車(chē)輛加速度超過(guò)1倍重力加速度時(shí)，意味著產(chǎn)生了急加速、急減速的情況，就給與扣分。

第二部分為駕駛信息記錄部分。CoreS3能力有限，所以將行車(chē)時(shí)傳感器獲取到的數(shù)據(jù)，以文件的方式保留下來(lái)。對(duì)行車(chē)數(shù)據(jù)進(jìn)行收集，為以后做出駕駛行為評(píng)估模型搭建數(shù)據(jù)基礎(chǔ)。記錄文件采取每分鐘寫(xiě)入一個(gè)單獨(dú)文件，保障文件不會(huì)因斷電丟失。

第三部分為UI部分。最為車(chē)載系統(tǒng)，盡可能做到不干擾駕駛員的注意力。所以界面使用儀表盤(pán)方式顯示了 車(chē)速和當(dāng)前評(píng)分。經(jīng)緯度、加速度等信息輔助顯示，顏色使用較為暗淡的方式，盡量做到不干擾駕駛員的注意力。

UI界面使用了LVGL，使用了Guider工具進(jìn)行UI繪制，代碼使用Arduino的C來(lái)編寫(xiě)，編程工具使用的是Vscode+platformio。

2、打分。

系統(tǒng)默認(rèn)駕駛員的駕駛行為為滿(mǎn)分（10分）?？鄯钟腥N情況。i：超速行為，當(dāng)車(chē)速超過(guò)120公里/小時(shí)開(kāi)始扣分，每秒扣1分。ii：當(dāng)加速度連續(xù)2次（2秒）檢測(cè)到超過(guò)1倍重力加速度，則扣1分。iii：當(dāng)加速度超過(guò)1.5倍重力加速度，則扣1分。

// 評(píng)分標(biāo)準(zhǔn) 如果連續(xù)兩次加速度超過(guò)1 或者單次加速度超過(guò)1.5 則扣一分，速度超過(guò)120KM/小時(shí) 扣1分
static int score = 10;
static float oldacc = 0; // 上次的加速度
int judgeScore(LvglQueue lvglmsg)
{
float acc = lvglmsg.acc; // 本次加速度
if (oldacc > 1 && acc > 1)
{
score--;
}
if (acc > 1.5)
score--;
if (lvglmsg.speed > 120)
score--;
oldacc = acc;
return score;
}
復(fù)制代碼
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21:56:28 :135628 ,latitude:2303.262207 ,longitude:11346.384766 ,speed:16.420000 ,acc_x:-0.071907 ,acc_y:0.873947 ,acc_z:-0.384332 ,gyro_x:1.678292 ,gyro_y:1.117390 ,gyro_z:0.743313 ,judge:10
21:56:30 :135630 ,latitude:2303.268555 ,longitude:11346.391602 ,speed:16.020000 ,acc_x:-0.021859 ,acc_y:0.944015 ,acc_z:-0.362359 ,gyro_x:1.800362 ,gyro_y:0.995319 ,gyro_z:1.475735 ,judge:10
21:56:30 :135630 ,latitude:2303.268555 ,longitude:11346.391602 ,speed:16.020000 ,acc_x:-0.040413 ,acc_y:0.927414 ,acc_z:-0.408502 ,gyro_x:-0.580009 ,gyro_y:0.262897 ,gyro_z:0.377102 ,judge:10
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三、作品實(shí)物圖

四、演示視頻

https://www.bilibili.com/video/BV13Q4y1w7Tc/

五、項(xiàng)目文檔

鏈接：https://pan.baidu.com/s/1-1XPUpYTo4-4l2V1egzBjA

提取碼：wsg6