Allen Bradley 1756-OB32/A 不久前試用并拆解了老羅直播間推薦的米家充氣寶，精致的外觀以及良心的價格讓人印象深刻，但是對于給汽車輪胎補氣這件事慢且續(xù)航捉急讓人感覺還差了那么點意思，所以本文將試用并拆解另一個品牌的車載充氣泵——固特異智能無線充氣泵。
固特異，輪胎大王，世界500強，所以在做充氣泵這件事上，讓人忍不住聯(lián)想到其專業(yè)的底子。我手上的就是它最新發(fā)布的數(shù)顯觸屏無線充氣泵，這個命令雖然很啰嗦，但是很好的詮釋了這個產(chǎn)品的所有功能。
數(shù)顯：數(shù)字顯示，相比指針式?jīng)]那么多玄學(xué)，讓人一目了然
觸屏：觸控操作，仿玻璃界面，時尚美光，且沒有傳統(tǒng)按鍵久用積灰的煩惱
無線：自帶鋰電池，無需接上車載充電座，無需累贅的電源線，充氣便捷方便
在實際使用過程中，除了噪音和米家充氣寶有的一拼，無論是充氣續(xù)航還是充氣速度都要比米家充氣寶表現(xiàn)優(yōu)異，30秒給輪胎補氣不是一句空話。良好的使用感受讓人忍不住想探究內(nèi)部到底是如何設(shè)計的？
拆解
取下底部的4個橡膠墊，擰下4顆螺絲，擰下底部銘牌下隱藏的一個螺絲，就能打開底殼，大致的內(nèi)部構(gòu)造如下圖所示。
首先是刻有型號為RS540的12V直流電機（RS540S-12V，11000rpm）、散熱風(fēng)扇、與電機緊密連接的充氣缸、充氣管，氣壓計，同時無論在散熱風(fēng)扇口還是進氣管口，都有帶柵極結(jié)構(gòu)的通風(fēng)孔，這種錯落的結(jié)構(gòu)設(shè)計能在平時防止機身灰塵，非常有意思且也有效。
充氣泵的原理其實并不復(fù)雜，當馬達啟動抽氣時，連通器的閥門被氣的氣壓沖開，氣體進入充氣缸；而向輪胎中打氣時，閥門又被充氣缸內(nèi)的氣壓關(guān)閉，氣體就進入輪胎中。簡單來說就是利用氣壓的原理來實現(xiàn)充氣。
在機身一側(cè)是提供無線充氣泵供電的鋰電池，由3節(jié)18650的鋰電池串聯(lián)組成的，每節(jié)2600mAh，總共7800mAh，因此續(xù)航也非常給力，從無到有充滿4條汽車空輪胎不是問題。
從這一側(cè)的內(nèi)部看基本上是主要的結(jié)構(gòu)裝置，同時也能看到主控板在另外一側(cè)，需要從頂部打開。因為頂部的界面是通過粘膠固定的，所以先通過加熱會更容易取下頂蓋。
主板電路并不復(fù)雜，不過讓人有些絕望，為啥呢？除了主控采用“牛屎”芯片外，其它幾個重要器件都抹去了絲印，也就無從得知到底是誰家的方案？
如上圖所示，右下角是是USB Type-C的充電管理電路，充電管理芯片絲印被抹去；左邊是“牛屎”主控芯片，并沒有使用傳統(tǒng)的單片機，成本壓榨到，主控的供電是通過合泰 降壓穩(wěn)壓器 （HT7310-1）實現(xiàn)的。主控芯片周圍的電路功能包括蜂鳴器，LED照明接口，氣壓傳感器接口。
5個電容觸摸傳感按鍵的彈簧組成電容觸摸感應(yīng)功能，而在主控與觸摸電路之間還有一個被抹去絲印的芯片，從電路布局上來看是連接牛屎芯片和觸摸按鍵的，因此可以推測這顆“牛屎”芯片主控應(yīng)該不是原生支持電容觸摸功能，而這顆無絲印的器件就是電容觸摸芯片；
充氣泵的主顯示界面采用LED數(shù)碼管顯示屏，同樣，僅靠這顆“牛屎”芯片顯然無法完成數(shù)碼管上如此多LED的驅(qū)動功能，所以，有兩顆 LED 驅(qū)動 IC（型號74HC595）來實現(xiàn)驅(qū)動功能。但為什么要兩顆？推測一顆的話不足以驅(qū)動 LED 屏上所有功能的顯示，通過兩顆級聯(lián)的方式來達到目的，這倒是和米家充氣寶的LED數(shù)碼管顯示屏驅(qū)動方案不謀而合。
Allen Bradley 1756-OB32/A
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Sony PowerHAD 3CCD Video Camera DXC-950 working
Olympus UMPlanFl 10x / 0.30 BD Objective Working
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VAT ASM Epsilon 3000 Slit Valve 07512-UA24-ADA1 working
ASM Epsilon 3000 VAT Slit Valve 02112-BA24-0001
ENI Polara 260 DC Power Supply 0190-01428 untested
AMAT Carriage Assy Gate Valve 3870-00716 New
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TEL ACT 12 Yaskawa Servo Y & Z Servo CRA-Driver Pair
Nikon Optistation 3 Objective Lens BD PlanApo 40/0.80
Aero2 Bypass Valve A2S-75-10-V551R new KF40
VAT MONOVAT Slit Valve 0210X-BA24-AXN1 3020-A0230
SVF aero2 Bypass Valve SM1A A2S-50-10-V433R new
AMAT XR80 Implanter Power Supply 9090-00045 ITL working
D-Link Gigabit Switch DGS-3224TGR 24 ports working
Newport Right Zoom Assembly 8017-1039-000 new, sealed
IBM Series 346 X011YIS Server 8840-11Y working
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Nova Controller Interface 315-21000-00 working
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KLA-Tencor 10KV Floodgun Assembly 720-23189-000
Leybold Ruvac Vacuum Pump Blower WSU 151 need rebuild
Nemic Lambda 5V 24V Power Supply Lot LWD30-0524 working
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Nikon NSR S202 RL-LIBHT1 PCB 4S018-473-2 working
Yaskawa Nikon NSR LASC-100W8 PCB 4S014-137 working
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Glassman 15KV Power Supply PS/ER15N20.0Y75 working
ENI Polara 260 Bipolar Pulsed Power Supply Untested
MKS TOOLweb Sensor Integration Platform SIP new
MKS TOOLweb Sensor Integration Platform SIP BlueBox new
AGL Magnetron Power Supply D12691-R working 0190-09307
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MRC Eclipse PVD Filler Ring D116049 F V New
LAM Research Accufiber Control Panel 718-061278-001 New
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MKS Type 167 Flow Readout 167A Lot of 6 Working
Rorze Transfer Robot Wrist Block 0190-04680 new
Tosoh Endura Upper Shield 805-375-SG-F-312 new
Tosoh AMAT Endura Upper Shield 805-375-SG new
Nikon Motor CCNT PCB PPAT6403A new
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KLA-Tencor AIT 2 VAS Buffer Assy. 0034223-000 working
Tosoh Upper Shield 805-375-SG-F-280 new
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Leybold Turbopump Cable 0620-01923 working 23m
Ham-Let Valve HM20 4VKLQ GF4 ISLT Lot of 15 3870-04967
LAM 4420 Etcher Outer Gate Assy 853-012350-002 Working
Kokusai Vertron Tube Controller CX-2000 CX1103C
Kokusai Vertron Tube Controller CX-2000 CX1103
AMAT Applied Materials P5000 RF Match 0010-09416
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GaSonics Aura 2000LL Asher Control Panel Lot of 3
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KLA-Tencor Aperture Heated Rod 781-23234-001 Used
Asyst Hine Design Process Chamber Elevator 04290-201
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