Article 7: Design of Multifunctional Intelligent Follow-up Luggage Control System | Undergraduate Graduation Project - [Module device selection, list, information]

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1. Component procurement list (with redundancy)

serial number	name	Model Specifications	unit price	quantity	Total price (including discount or shipping)	purchase chain	Remark
1	Fingerprint unlocking module	MR608 capacitive	65.3	1	145.69	Tmall_Lvshen Flagship Store
2	USB to TTL	-	3.28	1		Tmall_Lvshen Flagship Store
3	Sounder module	Passive, low level trigger	0.78	2		Tmall_Lvshen Flagship Store
4	weighing module	20kg	25	1		Tmall_Lvshen Flagship Store
5	HX711	Small size	2.15	1		Tmall_Lvshen Flagship Store
6	laser sensor	GY-530 VL53L0X	16	3		Tmall_Lvshen Flagship Store
7	OLED display module	1.3-inch 4-pin IIC interface (blue letter) 1306 driver	22.80	1	61.67	Tmall_Lvshen Flagship Store
8	OLED display module	0.96 inch 4-pin IIC interface (blue letter) 1306 driver	12.80	1		Tmall_Lvshen Flagship Store
9	Perfboard	Double side 9*15cm	4.80	3		Tmall_Lvshen Flagship Store
10	Perfboard	Double-sided 3*7cm (2 pieces)	1.60	4		Tmall_Lvshen Flagship Store
11	tact switch	6 6 5 (20 pieces)	1.98	1		Tmall_Lvshen Flagship Store
12	DC-DC Power Module	​	2.50	2		Tmall_Lvshen Flagship Store
13	12V lithium battery pack	2800mAh	39.8	1	54.8	Tmall_Qisuo Flagship Store	(instead of fast charge)
14	Lithium battery charger	12.6V2A	15	1		Tmall_Qisuo Flagship Store	(instead of fast charge)
15	Universal wheel	W001# large wheel	8	2 pairs	16	Taobao_Yongfeng luggage accessories
16	motor	520 encoder deceleration	49.9	2	142.40	Taobao
17	Motor fixing bracket	520 motor	3.8	2		Taobao
18	Bracket screws	M3 5mm 10pcs	0.23	12		Taobao
19	tire	65mm	10.9	2		Taobao
20	copper pillar			Slightly		Taobao
21	power module	3.3V 5V	5.53	3	16.04	Taobao_risym flagship store
22	Resistive Strain Half Bridge Sensor	50Kg	4.99	8	39.92	Taobao_risym flagship store
23	High decibel alarm	SHD4216 Active	3.52	1	3.52	Taobao_risym flagship store
24	AMS1117	AMS1117-3.3V package SOT223; AMS1117-5.0V package SOT223	4.84	2	9.68	Taobao_telesky flagship store
25	Thermostat Soldering Iron	Internal heat 60W temperature adjustment (smart chip + speed heat constant temperature) standard configuration	12.42	1	12.42	Taobao_Jinlaoda hardware franchise store
26	soldering iron tip	Regular pointed, small straight, medium horseshoe	3	3	9	Taobao_Jinlaoda hardware franchise store
27	Integrated Ultrasonic Ranging Module	JSN-SR04T	25.00	2	50	Xinde Electronics
28	Small pull ring scale	50Kg, precision 0.1Kg	13.90	1	13.90	Kaifeng flagship store
29	PI gold finger high temperature tape	8mm wide * 30 yards (1 roll price) small roll	3.20	1	18.40	Xinhongsen Industrial Materials Wholesale
30	PI gold finger high temperature tape	20mm wide * 30 yards (1 roll price) small	8.00	1		Xinhongsen Industrial Materials Wholesale
31	Transparent double-sided tape	10MM wide * 3 meters long (small roll)	10	1		Xinhongsen Industrial Materials Wholesale
32	Finished electronic scale	20KG sensor + HX711 module + tray 1 set	21	1	25.00	Shenzhen Zhuoye Technology Co., Ltd.
33	glue gun	White 20W hot melt glue gun is suitable for about 7mm glue stick	8.90	1	40.48	Xinwei flagship store
34	weighing display module		15.70	1		Xinwei flagship store
35	Level shifter	2-way level conversion (curved pin header) 3.3V-5V 5V-3.3V	1.15	2		Xinwei flagship store
36	Perfboard	5*7cm (two pieces)	1.12	4		Xinwei flagship store
37	Perfboard	10*22cm (one piece)	3.20	3		Xinwei flagship store
38	Aluminum profile		9	2	60	Oliver flagship store
39	Aluminum profile accessories	2020 three-dimensional corner connector (including top wire)	3.5	8		Oliver flagship store
total			​		718.92

Device Purchase List.xlsx

2. Device information

2.1 Fingerprint unlocking module√

• Purchase link: Tmall 1_Lvshen Flagship Store
• Model: AS608+TTL
• Reference video:
  • 100 yuan to make dormitory fingerprint unlock access control (ZW1)

There is a problem:

• Advantages and disadvantages of optical fingerprints and capacitive fingerprints
  • The principle of as608 fingerprint module_How much do you know about fingerprint lock fingerprint identification technology
• Suitcase use environment

Precautions:

• The AS608 module has been used for a long time, or the recognition rate is very low if the glass is dirty, don't ask me how I know. The optical version of AS608 was used in the operation demonstration. Later, I also found this problem, so I finally changed it to the capacitive AS608. The recognition rate and recognition speed performance are much better.

2.2 Ultra-distance alarm technology (√)

Solution 1: Ultrasonic distance alarm
Solution 2: RFID
solution 3: What is the difference between active buzzer and passive buzzer for UWB positioning
and ranging?
Buzzer: Tmall_Lvshen Flagship Store

2.3 Intelligent weighing technology √

• Purchase link:
  • HX711AD: Tmall_telesky flagship store
  • Body scale 50kg_risym flagship store
  • Body scale 50kg_TELESKY flagship store (text description available)
  • 40kg pressure sensor
• 型号：称重传感器 + HX711AD模块

​

参考视频：

• 0-5Kg称重传感器组装视频教程（含HX711-AD转换模块）-DIY开发板套件

参考教程

• 称重传感器的选型要求资料

2.4定位跟随

• uwb
  • 购买
    • UWB大功率无线测距室内定位基站模块开发板AGV导航DW1000资料教程 320
    • DW1000PA+LNA/UWB大功率无线测距模块超宽带测试厘米级定位模块 150纯模块
    • DWM1000 进口原装现货 定位模块 超宽带室内定位模块 UWB定位模块 115纯模块
  • 资料
    • 【UWB定位】 - DWM1000模块调试简单心得 - 1
    • 【UWB定位】 - DWM1000模块调试简单心得 - 2
    • 【UWB定位】 - DWM1000模块调试简单心得 - 3
    • DW1000学习之路（一） -------- 使用DW1000发送数据

2.5避障√

• GY-VL53L0X
  • GY-VL53L0X资料
  • 测试视频：
    • VL53L0x便宜的激光测距芯片arduino使用教程_B站
    • DIY简易3D扫描-基于arduino VL53L0x
• TOFSense激光测距传感器
  • 淘宝_Nooploop空循环
  • TF-Luna 8m微型激光测距传感器_盼磊旗舰店

2.6动力驱动模块√

所需电机类型：

编码减速电机

参考：

• 请问步进电机的力矩NM如果换算成kgcm的话，是多少
• 怎么选择智能小车上的驱动电机？要计算电机的功率和扭矩，要怎么计算?
  • 先不考虑加减速，可以先计算小车匀速运动时需要的扭矩，摩擦力乘以半径即是它需要的扭矩，扭矩乘以角速度就是小车的功率，然后选择电机及相应减速器（力矩满足要求可以不用减速器）。选择电机及减速器过后，你要验证电机是否满足要求，比如惯量匹配，转速匹配，力矩匹配等。当然这个过程可以反过来，最后确定电机型号。
• 汽车轮胎半径与摩擦力的关系
  • 滚动阻力矩与动力矩有关，动力矩等于轮胎半径与接触点的外力之积。
  • 摩擦力的计算公式F=mgu，其中mg是汽车总重，u是摩擦系数，只要轮胎材质和路面材质一定这个力就是恒定的，与半径没有关系
• 汽车轮胎滚动摩擦系数
  • 轮胎在一般沥青或混凝土路面的滚动摩擦系数0.018-0.020

电机规格计算

电机所需力矩计算

电动机的扭矩计算：电机的“扭矩”，单位是 N·m（牛米）计算公式是 T=9550 * P / n 。
P是电机的额定（输出）功率单位是千瓦（KW）
分母是额定转速n 单位是转每分 (r/min)
P和n可从 电机铭牌中直接查到。因为P n都是电机的额定值，故T就是电机的额定转矩了。
参考：
车辆行驶系的组成及受力分析
研究中，采用对汽车行驶中的受力分析方法对行李箱跟随驱动系统进行分析。

电机额定功率计算

电机转速计算

电机选型

	备注	电压	转速类型	最大扭矩	价格
520编码器减速电机	资料多大扭矩	12	11000/30=366	10kgf.cm	49
JGB37-520编码器减速电机		6/12	7 ~ 1000；12~1590	0.5~24； 1 ~ 31	36
25GA-370减速电机	67mm轮子	6/12/24	12~ 1360；12~1360	0.1~9.0；0.1 ~9.0	25
JGB37-520编码器电机	67mm轮子	6/12	7~1000； 12 ~1590	0.4~35； 0.7 ~35	40
555+减速箱+编码器	8000r/s；1:10；完全自定义

说明：

• 人走路速度0.9m/s
• 人跑步速度2-5m/s

参考速度：

轮胎选型：

驱动轮车轮直径: 5.5cm

行李箱万向轮

型号
直径：4.2-6cm ，选取4.8cm
淘宝：W001#大号轮

内容：行李箱万向轮直径一般在4.2-6cm之间，在这里选取

升降控制

方案一、根据箱内物品重量，有个线性弹簧对轮子的压力会改变
方案二、利用飞机起落架原理

2.7电源模块√

• USB双向快充

  • USB双向快充模块：
    • 充电宝双向快充模块 移动电源主板 3.7V转5V9V12V升压
    • PD双向快充电路板 模块移动电源芯片 充电宝 5v升压主板 QC3.0

• 锂电池

  • 12V伏锂电池组2200mAh（代替快充）天猫_祺索旗舰店
  • 12V伏锂电池组配套充电器12.6V2A 天猫_祺索旗舰店

2.8架构√

螺丝

铜柱

木板

铝合金型材