澶т俊铏�(h脿o)杓稿嚭鐨勭鎳�(y墨ng)璁婅▓(j矛)鑸囨ā鏁�(sh霉)杞�(zhu菐n)鎻涘櫒(ADC)鐨勬帴鍙ｅ(sh铆)鐝�(xi脿n)鏂规硶
闆绘⿱鏄簿瀵嗘脯閲忛浕闃绘垨鍏朵粬妯℃摤閲忕殑涓€绋湁鏁堢殑鏂规硶銆傛湰鏂囦粙绱逛簡濡備綍瀵�(sh铆)鐝�(xi脿n)鍏锋湁杓冨ぇ淇¤櫉(h脿o)杓稿嚭鐨勭鎳�(y墨ng)璁婅▓(j矛)鑸囨ā鏁�(sh霉)杞�(zhu菐n)鎻涘櫒(ADC)鐨勬帴鍙ｏ紝鐗瑰垾鏄�危-螖 ADC锛岀暥(d膩ng)浣跨敤纭呮噳(y墨ng)璁婅▓(j矛)鏅�(sh铆)锛屽畠鏄竴绋(sh铆)鐝�(xi脿n)澹撳姏璁婇€佸櫒鐨勪綆鎴愭湰鏂规
銆€銆€纭呮噳(y墨ng)璁婅▓(j矛)
銆€銆€纭呮噳(y墨ng)璁婅▓(j矛)鐨勫劒(y艒u)榛�(di菐n)鍦ㄤ簬楂橀潏鏁忓害锛屽畠閫氶亷鎰熸噳(y墨ng)鐢辨噳(y墨ng)鍔涘紩鐧�(f膩)鐨勭鏉愭枡楂旈浕闃昏畩鍖栦締妾㈡脯澹撳姏銆傜浉姣斾簬閲戝爆绠旀垨绮樿布绲插紡鎳�(y墨ng)璁婅▓(j矛)锛屽叾杓稿嚭閫氬父瑕佸ぇ涓€鍊�(g猫)鏁�(sh霉)閲忕礆(j铆)銆傞€欑ó纭呮噳(y墨ng)璁婅▓(j矛)鐨勮几鍑轰俊铏�(h脿o)杓冨ぇ锛屽彲浠ヨ垏杓冨粔鍍�(ji脿)鐨勯浕瀛愬櫒浠堕厤濂椾娇鐢ㄣ€備絾鏄�锛岄€欎簺灏忚€岃剢鍣ㄤ欢鐨勫畨瑁濆拰閫ｇ窔闈炲父鍥伴洠锛屽洜鑰屽鍔犱簡鎴愭湰锛岄檺鍒朵簡瀹冨€戝湪绮樿布寮忔噳(y墨ng)璁婅▓(j矛)鎳�(y墨ng)鐢ㄤ腑 鐨勪娇鐢�銆�
銆€銆€涓嶉亷锛岀敤MEMS宸ヨ棟鍒朵綔鐨勭澹撳姏鍌虫劅鍣ㄥ嵒鍏嬫湇浜嗛€欎簺寮婄梾銆傞€欑óMEMS澹撳姏鍌虫劅鍣ㄩ噰鐢ㄤ簡妯�(bi膩o)婧�(zh菙n)鐨勫崐灏�(d菐o)楂斿伐钘濆拰鐗规畩鐨勮潟鍒绘妧琛�(sh霉)銆傞€欑ó鐗规畩鐨勮潟鍒绘妧琛�(sh霉)鍙伕鎿囨€у湴寰炴櫠鍦撶殑鑳岄潰闄ゅ幓涓€閮ㄥ垎纭�锛屽緸鑰岀敓鎴愮敱鍫�(ji膩n)鍥虹殑纭呴倞妗嗗寘鍦嶇殑銆佹暩(sh霉)浠ョ櫨瑷�(j矛)鐨勬柟褰㈣杽鑶�銆傝€屽湪鏅跺湏鐨勬闈�锛屾瘡涓€鍊�(g猫)灏忚杽鑶滅殑姣忓€�(g猫)閭婁笂閮芥鍏ヤ簡涓€鍊�(g猫)澹撴晱闆婚樆锛� 鐢ㄩ噾灞窔鎶婂皬钖勭墖鍛ㄩ倞鐨勫洓鍊�(g猫)闆婚樆閫ｆ帴璧蜂締灏卞舰鎴愪竴鍊�(g猫)鎯犳柉鐧婚浕姗�銆傛渶鍚�锛屼娇鐢ㄩ墕鐭抽嫺寰炴櫠鍦撲笂閶镐笅鍚勫€�(g猫)鍌虫劅鍣ㄣ€傞€欐檪(sh铆)锛岀鍌虫劅鍣ㄥ凡缍�(j墨ng)鍒濆叿褰㈡厠(t脿i)锛屼絾閭勯渶瑕侀厤鍌欏鍔涚鍙ｅ拰閫ｆ帴寮曠窔鏂瑰彲浣跨敤銆傞€欎簺灏忓偝鎰熷櫒渚垮疁鑰屼笖鐩稿皪(du矛)鍙潬锛屼絾鍙楁韩搴﹁畩鍖栧奖闊胯純澶�锛岃€屼笖鍒濆鍋忕Щ鍜岄潏鏁忓害鐨勫亸宸緢澶�銆�
銆€銆€澹撳姏鍌虫劅鍣ㄥ(sh铆)渚�
銆€銆€鍦ㄦ绲﹀嚭涓€鍊�(g猫)澹撳姏鍌虫劅鍣ㄧ殑瀵�(sh铆)渚�,鍏舵墍娑夊強鐨勫師鐞嗛仼鐢ㄤ簬浠讳綍浣跨敤椤炰技闆绘⿱鐨勫偝鎰熷櫒銆傚叕寮�1绲﹀嚭浜嗕竴鍊�(g猫)鍘熷鐨勫鍔涘偝鎰熷櫒鐨勮几鍑烘ā鍨�銆傚叾涓�锛�VOUT鍦ㄧ郸瀹氬鍔�P涓嬪叿鏈夊緢瀵殑璁婂寲鑼冨湇锛屼笉鍚屽偝鎰熷櫒鍦ㄥ悓涓€婧害涓�锛屾垨鑰呭悓涓€鍌虫劅鍣ㄥ湪涓嶅悓婧害涓�锛屽叾VOUT閮� 鏈夋墍涓嶅悓銆傚洜姝よ鎻愪緵涓€鍊�(g猫)涓€鑷寸殑銆佹湁鎰忕京鐨勮几鍑猴紝姣忓€�(g猫)鍌虫劅鍣ㄩ兘蹇呴爤閫�(j矛n)琛屾牎姝�锛屼互瑁�(b菙)鍎熷櫒浠朵箣闁撶殑宸暟鍜屾韩搴︽紓绉�銆傞暦鏈熶互渚�锛屾牎婧�(zh菙n)閮芥槸閫氶亷妯℃摤闆昏矾閫�(j矛n)琛岀殑銆傜劧鑰岋紝鐝�(xi脿n)浠ｉ浕瀛愬(xu茅)鐨勯€�(j矛n)灞曚娇寰楁暩(sh霉)瀛楁牎婧�(zh菙n)姣旀ā鎿牎婧�(zh菙n)鏇村叿鎴愭湰鏁堢泭锛岃€屼笖鍏舵簴(zh菙n)纰烘€т篃鏇村ソ銆傛澶�锛屽埄鐢ㄤ竴浜涙ā鎿妧琛�(sh霉)鈥�绔呴杸鈥�锛屽彲浠ュ湪涓嶇姧鐗茬簿搴︾殑鍓嶆彁涓嬬啊鍖栨暩(sh霉)瀛楁牎 婧�(zh菙n)銆�
銆€銆€VOUT=VB(PS0(1+S1(T-T0))+U0+U1(T-T0)) (1)
銆€銆€寮忎腑锛�VOUT鐐洪浕姗嬭几鍑�锛�VB鏄浕姗嬬殑婵€鍕�(l矛)闆诲锛�P鏄鍔犲鍔�锛�T0鏄弮鑰冩韩搴︼紝S0鏄�T0婧害涓嬬殑闈堟晱搴�锛�S1鏄潏鏁忓害鐨勬韩搴︾郴鏁�(sh霉)(TCS)锛�U0鏄湪鐒″鍔涙儏娉佷笅闆绘⿱鍦ㄦ韩搴�T0鏅�(sh铆)鐨勮几鍑哄亸绉婚噺(鎴栧け琛�)锛岃€�U1鍓囨槸鍋忕Щ閲忕殑婧害绯绘暩(sh霉)(OTC)銆傚叕寮�(1)浣跨敤涓€娆″闋�(xi脿ng)鍏紡渚嗗皪(du矛)鍌虫劅鍣ㄩ€�(j矛n)琛屽缓妯★紝鑰屾湁浜涙噳(y墨ng)鐢ㄥ牬鍚堝彲鑳芥渻(hu矛)鐢ㄥ埌楂樻澶氶爡(xi脿ng)鍏紡銆佸垎娈电窔鎬ф妧琛�(sh霉)鎴栬€呭垎娈典簩娆￠€艰繎妯″瀷锛屽苟鐐哄叾涓殑绯绘暩(sh霉)寤虹珛涓€鍊�(g猫)鏌ュ皨琛�銆傜劇璜栦娇鐢ㄥ摢绋ā鍨�锛屾暩(sh霉)瀛楁牎婧�(zh菙n)鏅�(sh铆)閮借灏�(du矛)VOUT銆�VB鍜�T閫�(j矛n)琛屾暩(sh霉)瀛楀寲锛屽悓鏅�(sh铆)瑕侀噰鐢ㄦ煇绋柟鍏紡渚嗙⒑瀹氬叏閮ㄧ郴鏁�(sh霉)骞堕€�(j矛n)琛屽繀瑕佺殑瑷�(j矛)绠�銆傚叕寮�(2)鐢卞叕寮�(1)璁婂寲鎵€寰�锛屽緸涓彲娓呮鍦扮湅鍒�锛岄€氶亷鏁�(sh霉)瀛楄▓(j矛)绠�(閫氬父鐢卞井鎺у埗鍣�(MCU)鍩�(zh铆)琛�)鑰岃几鍑虹簿纰哄鍔涘€兼墍闇€鐨勪俊鎭�銆�
銆€銆€P=(VOUT/VB-U0-U1(T-T0))/(S0(1+S1(T-T0)) (2)
銆€銆€闆诲椹�(q奴)鍕�(d貌ng)
銆€銆€
銆€銆€鍦�1 瑭查浕璺洿鎺ユ脯閲忚▓(j矛)绠楀(sh铆)闅涘鍔涙墍闇€鐨勮畩閲�(婵€鍕�(l矛)闆诲銆佹韩搴﹀拰闆绘⿱杓稿嚭)
銆€銆€鍦ㄥ湒1鎵€绀虹殑闆昏矾涓�锛屼竴鍊�(g猫)楂樼簿搴�ADC鍏堝皪(du矛)VOUT (AIN1/AIN2)銆佹韩搴�(AIN3/AIN4)鍜�VB (AIN5/AIN6)閫�(j矛n)琛屾暩(sh霉)瀛楀寲锛岄€欎簺娓噺鍊奸毃鍚庤鍌抽€佸埌MCU锛屽湪閭ｉ噷杞�(zhu菐n)鎻涙垚瀵�(sh铆)闅涚殑澹撳姏銆傞浕姗嬬洿鎺ョ敱闆绘簮椹�(q奴)鍕�(d貌ng)锛岄浕婧�鍐嶆浣跨敤鍏紡(1)浠ュ強涓婅堪鍋囪ō(sh猫)鍙緱锛�
銆€銆€VOUTmax=5.25V脳(100psi脳300渭V/V/psi脳(1+(-2500脳10-6/鈩�)脳 (-40鈩�-25鈩�))+3mV/V+(-0.015mV/V/鈩�)脳(-40鈩�-25鈩�))=204mV
銆€銆€VOUTmin = 5.25脳(-3mV/V + ( 0.015mV/V/鈩�脳(-40鈩�-25鈩�)))=-21mV
銆€銆€鍥犳锛�ADC鐨勮几鍏ヨ寖鍦嶆槸-21锝�+204mV銆�
銆€銆€鍒嗚鲸鐜�
銆€銆€閬╃敤浜庢湰鎳�(y墨ng)鐢ㄧ殑ADC鎳�(y墨ng)鍏锋湁-21锝�+204mV 鐨勮几鍏ヨ寖鍦嶅拰30渭V/count鐨勯浕澹撳垎杈ㄧ巼銆傝┎ADC鐨勭法纰肩附鏁�(sh霉)鐐�(204mV + 21mV)/(30渭V/count)=7500锛屽嫊(d貌ng)鎱�(t脿i)鑼冨湇绋嶄綆浜�13浣�銆傚鏋滃偝鎰熷櫒鐨勮几鍑鸿寖鍦嶈垏ADC鐨勮几鍏ヨ寖鍦嶅畬鍏ㄥ尮閰�锛岄偅涔堜竴鍊�(g猫)13浣嶇殑杞�(zhu菐n)鎻涘櫒灏卞彲 浠ユ豢瓒抽渶瑕�銆傜敱浜�-21锝�+204mV鐨勯噺绋嬭垏閫氬父鐨�ADC杓稿叆鑼冨湇閮戒笉鍖归厤锛屽洜姝よ涔堝皪(du矛)杓稿叆淇¤櫉(h脿o)閫�(j矛n)琛岄浕骞崇Щ鍕�(d貌ng)鍜屾斁澶�锛岃涔堥伕鐢ㄦ洿楂樺垎杈ㄧ巼鐨�ADC銆傚垢閬�(y霉n) 鐨勬槸锛岀暥(d膩ng)鍓�危-螖杞�(zhu菐n)鎻涘櫒鐨勫垎杈ㄧ巼寰堥珮锛屽叿鏈夐洐妤垫€ц几鍏ュ拰鍏�(n猫i)閮ㄦ斁澶у櫒锛屼娇楂樺垎杈ㄧ巼ADC鐨勪娇鐢ㄨ畩?y艒u)妤滷(xi脿n)瀵�(sh铆)銆傞€欎簺危-螖ADC鎻愪緵浜嗘洿鐐虹稉(j墨ng)婵�(j矛)鐨勬柟妗�锛岃€屼笉闇€瑕佸 鍔犲叾浠栧厓鍣ㄤ欢銆傞€欎笉鍍呮笡灏忎簡闆昏矾鏉垮昂瀵革紝閭勯伩鍏嶄簡鏀惧ぇ鍜岄浕骞崇Щ浣嶉浕璺墍寮曞叆鐨勬紓绉昏宸�銆�
銆€銆€宸ヤ綔浜�5V闆绘簮鐨勫吀鍨�危-螖杞�(zhu菐n)鎻涘櫒锛岄噰鐢�2.5V鍙冭€冮浕澹�锛屽叿鏈�卤2.5V鐨勮几鍏ラ浕澹撹寖鍦�銆傜偤浜嗘豢瓒虫垜鍊戝皪(du矛)浜庡鍔涘偝鎰熷櫒鍒嗚鲸鐜囩殑瑕佹眰锛岄€欑óADC鐨� 鍕�(d貌ng)鎱�(t脿i)鑼冨湇鎳�(y墨ng)鐣�(d膩ng)鏄細(2.5V - (- 2.5V)) /(30渭V/count)=166 667锛岄€欑浉鐣�(d膩ng)浜�17.35浣嶇殑鍒嗚鲸鐜�锛屽緢澶�ADC閮借兘婊胯冻瑭茶姹�锛屼緥濡�18浣嶇殑MAX1400銆傚鏋滈伕鐢�SAR ADC锛屽墖鐢�(ch菐n)鐢熷緢澶х殑娴不(f猫i)锛屽洜?y脿n)妾獲鏄皣18浣嶈綁(zhu菐n)鎻涘櫒鐢ㄤ簬13浣嶆噳(y墨ng)鐢紝涓斿彧鐢�(ch菐n)鐢�11浣嶇殑绲�(ji茅)鏋�銆傜劧鑰岋紝閬哥敤18浣�(17浣嶅姞涓婄铏�(h脿o)浣�)鐨�危-螖杞�(zhu菐n)鎻涘櫒鏇寸偤鐝�(xi脿n) 瀵�(sh铆)锛岀洝绠′笁鍊�(g猫)鏈€楂樹綅鍏跺(sh铆)骞舵矑鏈変娇鐢�銆傚洜?y脿n)妲岊惇鑲嗙暊r(ji脿)澶�锛�危-螖杞�(zhu菐n)鎻涘櫒閭勫叿鏈夐珮杓稿叆闃绘姉鍜屽緢濂界殑鍣伈鎶戝埗鐗规€�銆�
銆€銆€18浣�ADC鍙互鐢ㄥ収(n猫i)缃斁澶у櫒鐨勪綆鍒嗚鲸鐜囪綁(zhu菐n)鎻涘櫒渚嗕唬鏇�锛屼緥濡�16浣嶇殑MAX1416銆傚叾8鍊嶇殑澧炵泭鐩哥暥(d膩ng)浜庡皣ADC杞�(zhu菐n)鎻涚祼(ji茅)鏋滃悜楂樹綅绉讳簡3浣�锛屽緸鑰屽埄鐢� 浜嗗叏閮ㄧ殑杞�(zhu菐n)鎻涗綅骞跺皣杞�(zhu菐n)鎻涢渶姹傛笡灏戝埌15浣�銆備笉閬庤閬哥敤鐒″鐩婄殑楂樺垎杈ㄧ巼杞�(zhu菐n)鎻涘櫒锛岄倓鏄湁澧炵泭鐨勪綆鍒嗚鲸鐜囪綁(zhu菐n)鎻涘櫒锛屽氨瑕佺湅鍏烽珨鎯呮硜涓嬬殑澧炵泭鍜岃綁(zhu菐n)鎻涢€熺巼涓嬬殑鍣伈瑕�(gu墨) 鏍笺€�危-螖杞�(zhu菐n)鎻涘櫒鐨勬湁鏁堝垎杈ㄧ巼閫氬父鍙楀埌鍣伈鐨勯檺鍒�銆�
銆€銆€婧害娓噺
銆€銆€濡傛灉娓噺婧害鍍呭儏鏄偤浜嗗皪(du矛)澹撳姏鍌虫劅鍣ㄩ€�(j矛n)琛岃(b菙)鍎�锛岄偅涔堟韩搴︽脯閲忎笉瑕佹眰鍗佸垎婧�(zh菙n)纰�锛屽彧瑕佹脯閲忕祼(ji茅)鏋滆垏婧害鐨勫皪(du矛)鎳�(y墨ng)闂�(gu膩n)绯诲叿鏈夎冻澶犵殑鍙噸寰�(f霉)鎬у嵆鍙�锛岄€欐ǎ灏囨渻(hu矛)鏈夋洿澶� 鐨勯潏娲绘€у拰杓冨鏉剧殑瑷�(sh猫)瑷�(j矛)瑕佹眰銆傚皪(du矛)浜庣澹撳姏鍌虫劅鍣�锛屾湁涓夊€�(g猫)鍩烘湰鐨勮ō(sh猫)瑷�(j矛)瑕佹眰锛氶伩鍏嶈嚜鍔犵啽锛屽叿鏈夎冻澶犵殑婧害鍒嗚鲸鐜�锛屼繚璀夊湪ADC鐨勬脯閲忚寖鍦嶄箣鍏�(n猫i)銆�
銆€銆€浣挎渶澶�Vt闆诲鎺ヨ繎浜庢渶澶у鍔涗俊铏�(h脿o)鏈夊埄浜庨噰鐢ㄧ浉鍚岀殑ADC鍜屽収(n猫i)閮ㄥ鐩婁締娓噺婧害鍜屽鍔�銆傛湰渚嬩腑鐨勬渶澶ц几鍏ラ浕澹撶偤+ 204mV锛岃€冩叜鍒伴浕闃荤殑瑾ゅ樊锛屾渶楂樻韩搴︿俊铏�(h脿o)闆诲鍙繚瀹堝湴閬告搰鐐�+180mV銆傚皣Rt涓婄殑闆诲闄愬埗鍒�+180mV涔熸湁鍒╀簬閬垮厤Rt鐨勮嚜鍔犵啽鍟忛銆備竴鏃︽渶澶� 闆诲閬稿畾锛屾牴鎿�(j霉)鍦�85鈩� (Rt=132.8惟)锛�VB=5.25V鐨勬浠朵笅鐢�(ch菐n)鐢熻┎鏈€澶ч浕澹撳彲浠ヨ▓(j矛)绠楀緱鍒�R1銆�R1鐨勫€煎彲閫氶亷鍏紡(3)閫�(j矛n)琛岃▓(j矛)绠楋紝鍏紡涓殑Vtmax鏄�RT涓婃墍鍏佽ū鐨勬渶澶у闄�銆傛韩搴﹀垎杈ㄧ巼绛変簬ADC鐨勯浕澹撳垎杈ㄧ巼闄や互Vt鐨勬韩搴︽晱鎰熷害銆傚叕寮�(4)绲﹀嚭浜嗘韩搴﹀垎杈ㄧ巼鐨勮▓(j矛)绠楁柟娉�銆�(娉ㄦ剰锛氭湰渚嬭▓(j矛)绠楃殑鏄渶灏忛浕澹撳垎杈ㄧ巼锛屾槸涓€绋純鐐轰繚瀹堢殑瑷�(sh猫)瑷�(j矛)銆備綘涔熷彲浠ヤ娇鐢ㄥ(sh铆)闅涚殑ADC鐒″櫔鑱插垎杈ㄣ€�)
銆€銆€R1= Rt脳(VB/Vtmax-1) (3)
銆€銆€R1=132.8惟脳(5.25V/0.18V-1)鈮�3.7k惟
銆€銆€TRES=VRES脳(R1 + Rt)2/(VB脳R1脳螖Rt/鈩�) (4)
銆€銆€閫欓噷锛�TRES鏄�ADC鎵€鑳藉垎杈ㄧ殑鏀濇皬婧害娓噺鍒嗚鲸鐜�銆�
銆€銆€TRES=30渭V/count脳(3700惟+ 132.8惟)2/(4.75V脳3700惟脳0.38惟/鈩�)鈮�0.07鈩�/count
銆€銆€0.07鈩�鐨勬韩搴﹀垎杈ㄧ巼瓒充互婊胯冻澶у鏁�(sh霉)鎳�(y墨ng)鐢ㄧ殑瑕佹眰銆備絾鏄�锛屽鏋滈渶瑕佹洿楂樼殑鍒嗚鲸鐜囷紝鏈変互涓嬪咕鍊�(g猫)閬告搰锛氫娇鐢ㄤ竴鍊�(g猫)鏇撮珮鍒嗚鲸鐜囩殑ADC;灏�RTD鎻涙垚鐔辨晱闆婚樆锛屾垨?q奴)?/span>RTD鐢ㄤ簬闆绘⿱锛屼互渚垮湪ADC涓兘澶犱娇鐢ㄦ洿楂樼殑澧炵泭銆�
銆€銆€娉ㄦ剰锛岃寰楀埌鏈夌敤鐨勬韩搴︾祼(ji茅)鏋�锛岃粺浠跺繀闋堝皪(du矛)渚涢浕闆诲鐨勮畩鍖栭€�(j矛n)琛岃(b菙)鍎�銆傚彟澶栦竴绋唬鏇挎柟娉曟槸灏�R1閫ｆ帴鍒�VREF锛岃€屼笉鏄�VB銆傞€欐ǎ鍙娇Vt涓嶄緷璩翠簬VB锛屼絾涔熷鍔犱簡鍙冭€冮浕澹撶殑璨�(f霉)杓�銆�
銆€銆€绲�(ji茅)璜�
銆€銆€纭呭闃诲叕寮忔噳(y墨ng)璁婅▓(j矛)姣旇純楂樼殑杓稿嚭骞呭害浣垮叾鍙互鐩存帴鍜屼綆鎴愭湰銆侀珮鍒嗚鲸鐜�危-螖ADC鎺ュ彛銆傞€欐ǎ閬垮厤浜嗘斁澶у拰闆诲钩绉讳綅闆昏矾甯朵締鐨勬垚鏈拰瑾ゅ樊銆傚彟澶�锛岄€欑ó鎳�(y墨ng)璁婅▓(j矛)鐨勭啽鐗规€у拰ADC鐨勬瘮渚嬬壒鎬у彲琚敤渚嗛’钁楅檷浣庨珮绮惧害闆昏矾鐨勫京(f霉)闆滅▼搴︺€�
鍚屾檪(sh铆)涔熺偤ADC銆侀浕澹撳熀婧�(zh菙n)婧愬拰 MCU渚涢浕銆傞浕闃诲叕寮忔韩搴︽娓櫒Rt鐢ㄤ締娓噺婧害锛�ADC鍏�(n猫i)鐨勮几鍏ュ京(f霉)鐢ㄥ櫒鍚屾檪(sh铆)娓噺闆绘⿱銆�RTD鍜岄浕婧愰浕澹�銆傜偤纰哄畾鏍℃簴(zh菙n)绯绘暩(sh霉)锛屾暣鍊�(g猫)绯荤当(t菕ng)(鎴栬嚦灏戞槸RTD鍜岄浕 姗�)琚斁鍒版亽婧閲岋紝鍦ㄥ鍊�(g猫)涓嶅悓婧害涓嬮€�(j矛n)琛屾脯閲�銆傛脯閲忔暩(sh霉)鎿�(j霉)閫氶亷娓│绯荤当(t菕ng)閫�(j矛n)琛岃檿鐞�锛屼互纰哄畾鏍℃簴(zh菙n)绯绘暩(sh霉)锛屾渶绲傜殑绯绘暩(sh霉)琚笅杓夊埌MCU骞跺瓨鍎�(ch菙)鍒伴潪鏄撳け鎬у瓨鍎�(ch菙)鍣ㄤ腑銆�
銆€銆€瑷�(sh猫)瑷�(j矛)瑭查浕璺檪(sh铆)涓昏鑰冩叜鐨勬槸鍕�(d貌ng)鎱�(t脿i)鑼冨湇鍜�ADC鐨勫垎杈ㄧ巼锛屾渶浣庤姹傚彇姹轰簬鍏烽珨鎳�(y墨ng)鐢ㄥ拰鎵€閬哥殑鍌虫劅鍣ㄥ拰RTD鐨勫弮鏁�(sh霉)銆� 鍦ㄦ湰渚嬩腑锛屽偝鎰熷櫒鐨勫叿楂斿弮鏁�(sh霉)濡備笅銆�
銆€銆€绯荤当(t菕ng)瑕�(gu墨)鏍�
銆€銆€路 婊块噺绋嬪鍔涳細100psi
銆€銆€路 澹撳姏鍒嗚鲸鐜囷細0.05psi
銆€銆€路 婧害鑼冨湇锛�-40锝�+85鈩�
銆€銆€路 闆绘簮闆诲锛�4.75锝�5.25V
銆€銆€澹撳姏鍌虫劅鍣ㄨ(gu墨)鏍�
銆€銆€路 S0 (闈堟晱搴�): 150锝�300渭V/V/psi
銆€銆€路 S1(闈堟晱搴︾殑婧害绯绘暩(sh霉)): 鏈€澶х偤-2500脳10-6/鈩�
銆€銆€路 U0 (鍋忕Щ): -3锝�+3mV/V
銆€銆€路 U1 (鍋忕Щ鐨勬韩搴︾郴鏁�(sh霉)): -15锝�+15渭V/V/鈩�
銆€銆€路 RB (杓稿叆闆婚樆): 4.5k惟
銆€銆€路 TCR (闆婚樆婧害绯绘暩(sh霉)): 1200脳10-6/鈩�
銆€銆€路 RTD: PT100
銆€銆€o 伪: 3850脳10-6/鈩�
銆€銆€o -40鈩冩檪(sh铆)鐨勯樆鍊�: 84.27惟
銆€銆€o 0鈩冩檪(sh铆)闃诲€�: 100惟
銆€銆€o 85鈩冩檪(sh铆)闃诲€�: 132.80惟
銆€銆€闆诲鍒嗚鲸鐜�
銆€銆€ADC鑳藉鎺ュ彈鐨勬渶灏忛浕澹撳垎杈ㄧ巼鍙牴鎿�(j霉)鍌虫劅鍣ㄨ兘澶犳娓埌鐨勬渶灏忓鍔涜畩鍖栨墍灏�(du矛)鎳�(y墨ng)鐨�VOUT寰楀埌銆傛サ绔儏娉佺偤浣跨敤鏈€浣庨潏鏁忓害鐨勫偝鎰熷櫒锛屽湪鏈€楂樻韩搴﹀拰鏈€浣庝緵闆婚浕澹撲笅閫�(j矛n)琛屾脯閲�銆傛敞鎰忥紝鍏紡(1)涓殑鍋忕Щ闋�(xi脿ng)涓嶅奖闊垮垎杈ㄧ巼锛屽洜?y脿n)姒夌洿濯涜暃H鑸囧鍔涢熆鎳�(y墨ng)鏈夐棞(gu膩n)銆備娇鐢ㄥ叕寮�(1)浠ュ強涓婅堪鍋囪ō(sh猫)鍙緱锛�
銆€銆€VOUTmin=4.75V脳(0.05psi/count脳150渭V/V/psi脳(1+(-2500脳10-6/鈩�)脳(85鈩�-25鈩�))
銆€銆€鈮�30.3渭V/count
銆€銆€鎵€浠�锛屾渶浣�ADC闆诲鍒嗚鲸鐜囩偤30渭V/ count銆�
銆€銆€ADC鐨勮几鍏ヨ寖鍦�
銆€銆€ADC鐨勮几鍏ヨ寖鍦嶅彇姹轰簬鏈€澶ц几鍏ラ浕澹撳拰鏈€灏忛浕澹�銆傛牴鎿�(j霉)鍏紡1锛岀敘(ch菐n)鐢熸渶澶�VOUT鐨勬浠讹細鏈€澶у鍔�100psi銆佹渶浣庢韩搴�- 40鈩�銆佹渶澶ч浕婧愰浕澹�5.25V鍜�3mV/V鐨勫亸绉�銆�-15渭V/V/鈩冪殑鍋忕Щ婧害绯绘暩(sh霉)銆�-2500脳10-6/鈩冪殑TCS浠ュ強300渭V/V/psi鐨勬渶楂橀潏鏁忓害銆傛渶灏忎俊铏�(h脿o)涓€鑸兘鍦ㄧ劇澹撳姏(P=0)锛岄浕婧愰浕澹撶偤5.25V銆�-3mV/V鐨勫亸绉汇€�-40鈩冪殑婧害浠ュ強OTC绛変簬+ 15渭V/V/鈩冪殑鎯呮硜涓嬪嚭鐝�(xi脿n)銆�
