基于Core系列第三代主機CoreS3的汽車駕駛評分器方案

一、項目名稱：汽車駕駛評分器

作者：aramy

二、項目概述：

公司有公用的維護車，每個員工開車習(xí)慣都不同，但是行車安全最重要。制作了“汽車駕駛評分器”這個項目，用來監(jiān)督記錄每次行車狀態(tài)數(shù)據(jù)。出現(xiàn)危險駕駛行為進行扣分。

項目硬件使用CoreS3。是一個M5Stack 推出的基于樂鑫 ESP32-S3 開發(fā)的 Core 系列第三代主機 CoreS3，集成了多個傳感器，其中包括這次項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GROVE - GPS (AIR530)模塊，使用GPS+北斗來進行定位。

1、主要框架：系統(tǒng)主要分為3個部分。

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，用來獲得當(dāng)前車輛的詳細(xì)位置和速度。有想過將交通地圖集成到系統(tǒng)中去，但是能力有限，沒能實現(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，從而實現(xiàn)對不同道路的限速評分管理，但是這個功能暫時沒有能夠?qū)崿F(xiàn)。所以對速度的評分，僅僅實現(xiàn)了最高速的扣分（當(dāng)時速超過120公里/小時則扣分）。加速度傳感器用來收集車輛加減速和轉(zhuǎn)彎時的加速度信息。設(shè)定了閾值，當(dāng)車輛加速度超過1倍重力加速度時，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，所以將行車時傳感器獲取到的數(shù)據(jù)，以文件的方式保留下來。對行車數(shù)據(jù)進行收集，為以后做出駕駛行為評估模型搭建數(shù)據(jù)基礎(chǔ)。記錄文件采取每分鐘寫入一個單獨文件，保障文件不會因斷電丟失。

第三部分為UI部分。最為車載系統(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方式顯示了 車速和當(dāng)前評分。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工具進行UI繪制，代碼使用Arduino的C來編寫，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分（10分）?？鄯钟腥N情況。i：超速行為，當(dāng)車速超過120公里/小時開始扣分，每秒扣1分。ii：當(dāng)加速度連續(xù)2次（2秒）檢測到超過1倍重力加速度，則扣1分。iii：當(dāng)加速度超過1.5倍重力加速度，則扣1分。

// 評分標(biāo)準(zhǔn) 如果連續(xù)兩次加速度超過1 或者單次加速度超過1.5 則扣一分，速度超過120KM/小時 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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三、作品實物圖

四、演示視頻

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

五、項目文檔

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

提取碼：wsg6