外文翻譯--一種新型的測量地熱的半導(dǎo)體溫度計-wenkub
2023-05-19 08:20:38 本頁面
【正文】 sing transistors in parallel or alternatively by adding additional current amplifying stages in cascade. The same principle may be utilised for higher temperature measurements. It must be mentioned in this connection that the maximum temperature should not exceed the normal working temperature {about 500 C for Germanium transister) range of the transistor used. With Silicon transistor, however, this range may be increased appreciably. For the measurement of higher temperature, it may be necessary to reduce the supply voitage in order to cut down the collector dissipation rate of the amplifier. This instrument suffers from the mon draw back due to drift as the other type which utilises thermistor caused by the unavoidable change in the characteristic of the sensing element due to aging. Effect of this drift in the present instrument is small as the calibration curve has been found to repeat itself without any appreciable deviation. Similar instrument with some modifications, if necessary may also be utilised for the study of temperature variations with depth in oceanographic investigations. 4. Acknowledgements The author is grateful to Sri L. N. KAILASAM, Chief Geophysicist for his keen interest in the work and encouragement, and to Sri D. GUPTA SARMA, Senior Geophysicist for his helpful suggestions. REFERENCES [1] A. D. MISENER and A. E. BECK, The measurement of heat flow over land, Methods and Techniques in Geophys. 1 (1960), 10. [2] G. N. NEWS~EAD and A. E. BECk, Borehole Temperature measuring Equipment and Geothermal flux in Tasmania, Austral .J. Phys. 6 (1953), 480. [3] A. C. ANDERSON, Temperature measurement with thermistors, Electronic and Radio Engineer 35 (1958), 80. (Received 12th May 1965) 一種新型的測量地熱的半導(dǎo)體溫度計 By SATYABRATA DATTA1 摘要： 一種便攜式的呈固態(tài)的被設(shè)計和構(gòu)造成 ， 為了測量溫度變化在鉆井內(nèi)部較深的區(qū)域在如下被描述。這主要是因為熱敏電阻有很高的負溫度阻抗系數(shù)。在測試下的溫度被從一個校準圖表或校準曲線中所展示的讀取后，不平衡的電壓反抗溫度在實驗室預(yù)先的構(gòu)造中并且是被控制得情況下。 2 .描述 儀器的工作原理如下所示 : 電流（ I）流經(jīng) PN偏節(jié)有以下關(guān)系： I ≈ i0 (e V/VT 1), （ 1） 1) Geophysics Division, Geological Survey of India, Calcutta16 (India). This paper is published by the kind permission of the Director General, Geological Survey of India. 2) Numbers in brackets refer to References, page 126. 其中 i0是結(jié)飽和電流， V是應(yīng)用結(jié)電壓也就是 +ve 正向電壓， VT 是 結(jié)勢壘電壓 = (K T)/q, ， K是 波爾茨曼 常數(shù)， T 是節(jié)溫度在 0攝氏度（單位：攝氏度） Q是電子電荷量。因此，飽和電流的大小很大程度取決于溫度和實際的指數(shù)增加方式。兩個晶體管以并聯(lián)的方式置于溫度感測頭并且熱接觸鉆井內(nèi)的液體。 Vol. 61, 1965/I1) 一種新型的半導(dǎo)體測溫計 照片內(nèi)包含了一套完整的儀器設(shè)備 ，包括了表面設(shè)備，電纜絞車的傷口以及如圖所示 3 的探針。儀器的表面包含了一個有兩節(jié)干電池提供的電壓的電壓源，這兩節(jié)干電池同時串聯(lián)在一個靈敏安培 表上來調(diào)節(jié)分流以便這個靈敏安培表可以測量電流在零下 18度到零上 10的變化區(qū)間范圍之內(nèi)。溫度曲線實際上是一條直線并且被發(fā)現(xiàn)適應(yīng)于經(jīng)驗關(guān)系 i =34 e 。為了避免在測量溫度時的漂移對于放大器的影響，其放大作用的晶體管同樣也被安裝在有機玻璃塊中位于探針底部并且電流 i的變化區(qū)域是 2(1 +
畢業(yè)設(shè)計相關(guān)推薦
鄂ICP備17016276號-1