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THE CAT
VS
MINI 4WD ROBOT
進階嵌入式系統設計與實作_期末專題第10組
作品想法
• 自身有養寵物習慣
• 主人經常不在家
• 貓咪懶惰
• 貓咪怕孤單
• 喜歡看貓咪抓狂的樣子
不過最主要的原因是………………….
貓很可愛!!
貓咪的特性?
• Excellent Hearing
• Great Jumping Ability
• High Agility
• Full of Curiosity
• High Attack
• 吸引貓咪的注意力
• 移動速度快
• 會閃貓
• 要避障
Our Project Need to
MINI 4WD
爆走兄弟
童年回憶
SYSTEM ARCHITECTURE
PIR Sensor
Ultrasonic
Sensor
Ultrasonic
Sensor
PIR Sensor
Ultrasonic
Sensor
Ultrasonic
Sensor
Servo Motor
ARM Cortex-M4
MCU
四驅車轉彎?
四驅車只用一個馬達來
驅動後輪兩輪 , 故這
樣只能正反轉。
使用一個Servo motor
來控制轉彎。
所以四驅車
變三輪車了
實際測試三輪車甩尾結果後
翻車
改用第五輪轉向定理
牛車
車身 前後分離
車身重量問題
車子放在地上不會跑?
車身太重……..
馬達扭力不夠……..
不加電池的車身重量160克
(電池一共五顆)
改善與解決問題
• 換掉所有的鐵銅柱
 改用塑膠銅柱
• 試著減少電池的數量
• 選取高扭力的馬達
TORQUE-TUNED MOTOR PRO
斷開一切的牽連
為了減少MCU的面積,時間不夠來不及Layout板子,
只好………
電路規劃
左邊兩個部分整合在一塊電路板,
並將電路再縮減更小的版本,
以節省面積。
馬達驅動電路(採用兩組Relay)
升壓IC電路(4.5 to 5 )
不時提醒自己重量以及面積的考量
電源規劃
• 總共五顆電池 ,規劃如下:
 3顆電池 經過升壓電路 成 5V 供給 MCU。
 2顆電池 供給四驅車專用馬達。
• 大電流與小電流的裝置獨立分開,以免馬達驅動時所需的大電流
搶走MCU的電流導致電源不穩定使得系統重置。
閃貓、避障之軟體機制
Idle
Front PIR Back PIR Both PIR
Forward
Left-
Forward
Right-
Forward
Backward
Left-
Backward
Right-
Backward
Moving
Rest
CAR_POLLING_PERIOD
THRESHOLD_DISTANCE
PIR_DEBOUNCE_NUM
CAR_MOVING_PERIOD
CAR_REST_PERIOD
The Final Version !!
外觀包裝
平時測試環境
以人代貓
逗貓神器
實驗成果
貓咪很嗨
攻擊力很強
DEMO TIME
THE CAT VS. MINI 4WD ROBOT
Cat vs Mini4WD ROBOT

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Cat vs Mini4WD ROBOT