美國派克壓力傳感器工作原理及介紹：
PARKER壓力傳感器主要應(yīng)用在加速度、壓力和力等的測量中。壓電式加速度傳感器是一種常用的加速度計(jì)。它具有結(jié)構(gòu)簡單、體積小、重量輕、使用壽命長等優(yōu)異的特點(diǎn)。壓電式加速度傳感器在飛機(jī)、汽車、船舶、橋梁和建筑的振動(dòng)和沖擊測量中已經(jīng)得到了廣泛的應(yīng)用，特別是航空和宇航領(lǐng)域中更有它的特殊地位。壓電式傳感器也可以用來測量發(fā)動(dòng)機(jī)內(nèi)部燃燒壓力的測量與真空度的測量。也可以用于工業(yè)，例如用它來測量槍炮子彈在膛中擊發(fā)的一瞬間的膛壓的變化和炮口的沖擊波壓力。它既可以用來測量大的壓力，也可以用來測量微小的壓力PARKER壓力傳感器實(shí)際上是一種將質(zhì)量信號(hào)轉(zhuǎn)變?yōu)榭蓽y量的電信號(hào)輸出的裝置。用傳感器茵先要考慮傳感器所處的實(shí)際工作環(huán)境，這點(diǎn)對(duì)正確選用稱重傳感器至關(guān)重要，它關(guān)系到傳感器能否正常工作以及它的安全和使用壽命，乃至整個(gè)衡器的可靠性和安全性。在稱重傳感器主要技術(shù)指標(biāo)的基本概念和評(píng)價(jià)方法上，新舊國標(biāo)有質(zhì)的差異。

PARKER壓力傳感器由兩塊固定金屬板和與轉(zhuǎn)動(dòng)軸相連的可動(dòng)金屬板構(gòu)成。可動(dòng)金屬板處于電轉(zhuǎn)速傳感器容量zui大的位置，當(dāng)轉(zhuǎn)動(dòng)軸旋轉(zhuǎn)180°時(shí)則處于電容量zui小的位置。電容量的周期變化速率即為轉(zhuǎn)速?？赏ㄟ^直流激勵(lì)、交流激勵(lì)和用可變電容構(gòu)成振蕩器的振蕩槽路等方式得到轉(zhuǎn)速的測量信號(hào)。介質(zhì)變化型是在電容器的兩個(gè)固定電極板之間嵌入一塊高介電常數(shù)的可動(dòng)板而構(gòu)成的?？蓜?dòng)介質(zhì)板與轉(zhuǎn)動(dòng)軸相連，隨著轉(zhuǎn)動(dòng)軸的旋轉(zhuǎn)，電容器板間的介電常數(shù)發(fā)生周期性變化而引起電容量的周期性變化，其速率等于轉(zhuǎn)動(dòng)軸的轉(zhuǎn)速。

PARKER壓力傳感器的能源輸入及信號(hào)輸出是由兩組帶間隙的特殊環(huán)形旋轉(zhuǎn)變壓器承擔(dān)的，因此可實(shí)現(xiàn)能源及信號(hào)的無接觸傳遞。該應(yīng)變傳感器測量原理如圖2所示。 在一段特制的彈性軸上粘貼的測扭應(yīng)變片并組成電橋，以形成基礎(chǔ)扭矩傳感器，然后在軸上再固定能源環(huán)形旋轉(zhuǎn)變壓器的次級(jí)線圈、軸上印刷電路板和信號(hào)環(huán)旋轉(zhuǎn)變壓器的初級(jí)線圈。電路板上包含整流穩(wěn)壓電源、儀表放大電路及V／F變換電路。在傳感器的外殼上固定著激磁電路、能源環(huán)形旋轉(zhuǎn)變壓器的初級(jí)線圈、信號(hào)環(huán)形變壓器的次級(jí)線圈及信號(hào)處理電路。 傳感器電路部分在工作時(shí)，由外部電源向傳感器提供15V電源，激磁電路中的晶體振蕩器產(chǎn)生400Hz的方波，經(jīng)過TDA2003功率放大即產(chǎn)生交流激磁功率電源，通過能源環(huán)形旋轉(zhuǎn)變壓器從靜止的初級(jí)線圈T1傳遞至旋轉(zhuǎn)的次級(jí)線圈T2， 然后將得到的交流電源通過軸上的整流、濾波電路處理后變成%26;#177;5V的直流電源。按信號(hào)形式的不同，轉(zhuǎn)速傳感器可分為模轉(zhuǎn)速傳感器擬式和數(shù)字式兩種。前者的輸出信號(hào)值是轉(zhuǎn)速的線性函數(shù),后者的輸出信號(hào)頻率與轉(zhuǎn)速成正比,或其信號(hào)峰值間隔與轉(zhuǎn)速成反比。

parker    PEFF63NSM    SAE Female Flange Elbow NPT    6000 PSI, 3/4", metric bolts
parker    PEFF63NS    SAE Female Flange Elbow NPT    6000 PSI, Size 3/4"
parker    PEFF63NNBRSSM    SAE Female Flange Elbow NPT    6000 PSI, 3/4", metric bolts
parker    PEFF63GSU    SAE Female Flange Elbow BSPP    6000 PSI, 3/4", UNC screws
parker    PEFF63GSSM    SAE Female Flange Elbow BSPP    6000 PSI, 3/4", metric bolts
parker    PEFF63GSS    SAE Female Flange Elbow BSPP    6000 PSI, Size 3/4"
parker    PEFF63GSM    SAE Female Flange Elbow BSPP    6000 PSI, 3/4", metric bolts
parker    PEFF63GS    SAE Female Flange Elbow BSPP    6000 PSI, Size 3/4"
parker    PEFF63GNBRSSM    SAE Female Flange Elbow BSPP    6000 PSI, 3/4", metric bolts
parker    PEFF62NSU    SAE Female Flange Elbow NPT    6000 PSI, 1/2", UNC screws
parker    PEFF62NSSM    SAE Female Flange Elbow NPT    6000 PSI, 1/2", metric bolts
parker    PEFF62NSS    SAE Female Flange Elbow NPT    6000 PSI, Size 1/2"
parker    PEFF62NSM    SAE Female Flange Elbow NPT    6000 PSI, 1/2", metric bolts
parker    PEFF62NS    SAE Female Flange Elbow NPT    6000 PSI, Size 1/2"
parker    PEFF62NNBRSSM    SAE Female Flange Elbow NPT    6000 PSI, 1/2", metric bolts
parker    PEFF62GSU    SAE Female Flange Elbow BSPP    6000 PSI, 1/2", UNC screws
parker    PEFF62GSSM    SAE Female Flange Elbow BSPP    6000 PSI, 1/2", metric bolts
parker    PEFF62GSS    SAE Female Flange Elbow BSPP    6000 PSI, Size 1/2"
parker    PEFF62GSM    SAE Female Flange Elbow BSPP    6000 PSI, 1/2", metric bolts
parker    PEFF62GS    SAE Female Flange Elbow BSPP    6000 PSI, Size 1/2"
parker    PEFF62GNBRSSM    SAE Female Flange Elbow BSPP    6000 PSI, 1/2", metric bolts
parker    PEFF38NSU    SAE Female Flange Elbow NPT    3000 PSI, 2", UNC screws
parker    PEFF38NSSM    SAE Female Flange Elbow NPT    3000 PSI, 2", metric bolts
parker    PEFF38NSS    SAE Female Flange Elbow NPT    3000 PSI, Size 2"
parker    PEFF38NSM    SAE Female Flange Elbow NPT    3000 PSI, 2", metric bolts
parker    PEFF38NS    SAE Female Flange Elbow NPT    3000 PSI, Size 2"
parker    PEFF38NNBRSSM    SAE Female Flange Elbow NPT    3000 PSI, 2", metric bolts
parker    PEFF38GVITSM    SAE Female Flange Elbow BSPP    3000 PSI, Size 2", M12x45
parker    PEFF38GSU    SAE Female Flange Elbow BSPP    3000 PSI, 2", UNC screws
parker    PEFF38GSSM    SAE Female Flange Elbow BSPP    3000 PSI, 2", metric bolts
parker    PEFF38GSS    SAE Female Flange Elbow BSPP    3000 PSI, Size 2"
parker    PEFF38GSM    SAE Female Flange Elbow BSPP    3000 PSI, 2", metric bolts
parker    PEFF38GS    SAE Female Flange Elbow BSPP    3000 PSI, Size 2"
parker    PEFF38GNBRSSM    SAE Female Flange Elbow BSPP    3000 PSI, 2", metric bolts
parker    PEFF36NSU    SAE Female Flange Elbow NPT    3000 PSI, 1 1/2", UNC screws
parker    PEFF36NSSM    SAE Female Flange Elbow NPT    3000 PSI, 1 1/2", metric bolts
parker    PEFF36NSS    SAE Female Flange Elbow NPT    3000 PSI, Size 1 1/2"
parker    PEFF36NSM    SAE Female Flange Elbow NPT    3000 PSI, 1 1/2", metric bolts
parker    PEFF36NS    SAE Female Flange Elbow NPT    3000 PSI, Size 1 1/2"
parker    PEFF36NNBRSSM    SAE Female Flange Elbow NPT    3000 PSI, 1 1/2", metric bolts
parker    PEFF36GVITSU    SAE Female Flange Elbow BSPP    3000 PSI, 1 1/2", UNC screws