【正文】
這是因?yàn)閭鞲衅鲗?biāo)準(zhǔn)輸入信號的響應(yīng)容易用實(shí)驗(yàn)方 法求得,并且它對標(biāo)準(zhǔn)輸入信號的響應(yīng)與它對任意輸入信號的響應(yīng)之間存在一定的關(guān)系,往往知道了前者就能推定后者。大多數(shù)傳感器是以物理原理為基礎(chǔ)運(yùn)作的。 根據(jù)傳感器工作原理,可分為 物理傳感器 和化學(xué)傳感器二大類 : 傳感器工作原理的分類物理傳感器應(yīng)用的是物理效應(yīng),諸如 壓電效應(yīng) ,磁致伸縮 現(xiàn)象,離化、極化、熱電、光電、磁電等效應(yīng)。 由此可見, 傳感器技術(shù) 在發(fā)展經(jīng)濟(jì)、推動(dòng)社 會進(jìn)步方面的重要作用,是 十分明顯的。許多基礎(chǔ)科學(xué)研究的障礙,首先就在于對象信息的獲取存在困難,而一些新機(jī)理和高靈敏度的檢測傳感器的出現(xiàn),往往會導(dǎo)致該領(lǐng)域內(nèi)的突破。 在基礎(chǔ)學(xué)科研究中,傳感器更具有突出的地位。 新技術(shù)革命的到來,世界開始進(jìn)入信息時(shí)代。 傳感器的作用 人們?yōu)榱藦耐饨绔@取信息,必須借助于感覺器官。 傳感器是一種物理裝置或生物器官,能夠探測、感受外界的信號、物理?xiàng)l件(如光、熱、濕度)或化學(xué)組成(如煙霧),并將探知的信息傳遞給其他裝置或器官。根據(jù)輸入的參數(shù)值,程序作出相應(yīng)的處理。 電 子秤 基本上由傳感器、放大電路、 A/D 變換電路、單片機(jī)控制顯示部分、開關(guān)矩陣電路、鍵盤電路及電源電路組成。電子秤還具有自動(dòng)零點(diǎn)追蹤,超負(fù)荷顯示自動(dòng)熄滅之特點(diǎn)。 。 5.可同時(shí)進(jìn)行重量、數(shù)量、累計(jì)功能 (GLH 只有數(shù)量累計(jì) ) 、數(shù)量上限警示功能 。 +E、 E 端接上 + 電壓, 傳感器正確施加一個(gè)壓力,如輸出 +_S 增大,則紅表筆為 +S,反之 S。 數(shù)字亂跳 判斷傳感器的 +E、 E、 +S、 S 4 條線兩兩這間的電阻值,共有 6 組。 。 影響 。 。 :由許多單獨(dú)按鍵組合在一起 。 顯示器種類: (液晶顯示):免插電、省電、附帶背光 。 第八部分 傳感器類型: :價(jià)格適中、精度高、使用廣泛 。 背光 。 ,可接打印機(jī)或電腦驅(qū)動(dòng) 。 6.特有功能:扣重、預(yù)扣重、歸零、累計(jì)、警示等 。 。 : 一臺具有計(jì)數(shù)功能的電子秤,內(nèi)部具有分辯能力的一個(gè)參數(shù) 。 差: 等級檢定時(shí)允許的最大偏差 。 第二部分 秤的分類: :電子秤機(jī)械秤 機(jī)電結(jié)合秤 能分:計(jì)數(shù)秤 計(jì)價(jià)秤 計(jì)重秤 :工業(yè)秤商業(yè)秤 特種秤 第三部分 秤的種類: 指全稱量在 30Kg 以下的電子秤 指全稱量在 30300Kg 以內(nèi)的電子秤 指全稱量在 300Kg 以上的電子秤 第四部分 按精確度分類: I 級: 特種天平 精密度 ≥1/10 萬 II 級: 高精度天平 1/1 萬 ≤ 精密度< 1/10 萬 III 級: 中精度天平 1/1000≤ 精密度<1/1 萬 IV 級: 普通秤 1/100≤ 精密度< 1/1000 第五部分 專業(yè)術(shù)語: : 一臺電子秤不計(jì)皮重,所能稱量的最大的載荷 。該信號經(jīng)放大電路放大輸出到模數(shù)轉(zhuǎn)換器??赡懿粚儆谟?jì)量器具。頂尖條碼標(biāo)簽秤有著許多卓越的特點(diǎn),以太網(wǎng)功能使管理更加方便。 電子秤 與機(jī)械秤比較有體積小、重量輕、結(jié)構(gòu)簡單、價(jià)格低、實(shí)用價(jià)值強(qiáng)、維護(hù)方便等特點(diǎn),可在各種環(huán)境工作,重量信號可遠(yuǎn)傳,易于實(shí)現(xiàn)重量顯示數(shù)字化,易于與計(jì)算機(jī)聯(lián)網(wǎng),實(shí)現(xiàn)生產(chǎn)過程自動(dòng)化,提高勞動(dòng)生產(chǎn)率。s own sense organs, the study of natural phenomena and laws, and production activities in their functions on far enough. To meet this situation, we need sensors. It can be said sensor is an extension of human senses, also known as electronic features. The arrival of the new technological revolution, the world entered the information age. In the course of the use of information, we must first resolve is to obtain accurate and reliable information, and sensors is to obtain information in the field of natural and production of the main ways and means. In modern industrial production, especially automated production process, the use of various sensors to monitor and control the various parameters of the production process, so that devices work best in the normal state or condition, and to achieve the best quality products. Therefore we can say, without a large number of good sensors, modern production base will be lost. In the basic science research, a more prominent position sensor. The development of modern science and technology into many new areas: for example, thousands of light years to observe the macro level of the vast universe, to observe microscopically small particles cm the world, vertical, to observe the evolution over hundreds of years of celestial bodies , a short response to the s moment. In addition, there was even a matter of deepening understanding, developing new energy, new materials, play an important role in a variety of extreme technology such as ultrahigh temperature, ultralow temperature, high pressure, ultrahigh vacuum, powerful magic field, ultraweak magic bagging, etc. . Obviously, to obtain a large number of human senses can not directly access the information, Not patible with sensors is impossible. Many basic scientific research obstacles, first of all to obtain information on the object is difficult, and a new highly sensitive detection mechanism and the emergence of sensors, often lead to breakthroughs in the field. The development of a number of sensors is often a pioneer in the development of marginal subjects. Sensor has already perated into, such as industrial production, space development, marine exploration, environmental protection, resource survey, medical diagnostics, biotechnology, and even conservation areas and so most of the pan. It is no exaggeration to say that, from the vast space, the vas tness of the ocean, as well as a variety of plex engineering systems, almost every modern project, are inseparable from a variety of sensors. Thus, the sensor technology in economic development, promote the important role of social progress is very clear. Countries in the world attach great importance to the development of this area. I believe in the near future, there will be a leap in sensor technology, to achieve status mensurate with its important