巻号一覧
3 巻, 3 号
選択された号の論文の7件中1～7を表示しています
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D. M. Boyd1964 年 3 巻 3 号 p. 159-162
発行日: 1964/03/10
公開日: 2010/10/21
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山口 楠雄1964 年 3 巻 3 号 p. 163-170
発行日: 1964/03/10
公開日: 2010/10/21
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政木 和三1964 年 3 巻 3 号 p. 171-182
発行日: 1964/03/10
公開日: 2010/10/21
ジャーナル フリーThis paper deals with the process of study on various methods and techniques of measurement of the defects or thickness of material of complex composition such as concrete. The measurement is done by the ultra-sonic flow detector which utilizes the Ni-wire driver employing the forced magne tostriction as the source of ultra-sonic wave and produces the ulrta-sonic wave having the short single pulse of low frequency. First given are the sample manufacture of the ultra-sonic flow detector with the laminated nickel plate resonator and actual measurement by using it. This detector is mainly for the above-mentioned properties of such material as concrete. Next given are the theoretical treat ment on the driving mechanism of Ni-wire driver and the results of actual measurement with this equipment.抄録全体を表示PDF形式でダウンロード (8147K) -
山下 直1964 年 3 巻 3 号 p. 183-194
発行日: 1964/03/10
公開日: 2010/10/21
ジャーナル フリーElectronic and pneumatic flow control systems are compared each other in order to obtain quick response; dynamic characteristic of commercialized instruments is determined and how signal conduits, positioners etc. affect the characteristic is examined too. Compared with pneumatic system, electronic system yields larger phase lag and does not always offer better response to outer disturbances. At the same time, it proves that, using a pilot type control valve developed by the author, a flow control system of which 95% response time is as quick as 0.3 sec can be realized.抄録全体を表示PDF形式でダウンロード (1569K) -
新井 智一, 一条 文二郎1964 年 3 巻 3 号 p. 195-208
発行日: 1964/03/10
公開日: 2010/10/21
ジャーナル フリーMeasurement of moisture content in grains is an important matter for storage, processing and quality control. Heating is the ordinary method of measuring it, but this often involves waste of time. There are several measuring instruments available in the market, specially designed for quick moisture determination. Many problems still remain unsolved concerning the moisture meter for grains. Dielectric measurement of a small moisture content by extraction suggests one way of settlement. It is important, however, to choose a solvent with desirable properties. The authors have made experiments on various solvents and have finally found out that dioxane and tetrahydrofuran have the best fitted characteristics for the purpose. In our experiments, the dielectric measurement was made by means of a highly stabilized and sensitive reactance meter. When grains and each solvent were put into the same separating funnel, the moisture content was first absorbed from grains and then intermixed with the solvent. This mixed solution was poured into a measuring electrode which consists of a cylinder with a particular shielding plate. Since variation of dielectric constant of solution can be read on the dial degree of the condenser in the reactance meter, it follows that this dial degree numerically indicates the moisture content in grains. Similarly, small moisture contents in rice, wheat, sugar, salt, wood, silica gel, wool, green tea, sand and ammonium sulphate were measured by this method. From these data, the dielectric measurement method proves to be most desirable to determine the moisture content of such electrolytes as salt ammonium sulphate.抄録全体を表示PDF形式でダウンロード (1407K) -
今井 聖1964 年 3 巻 3 号 p. 209-217
発行日: 1964/03/10
公開日: 2011/05/24
ジャーナル フリーIn statistical analyses of many physical problems, the concept of correlation function is widely applied. Recently, real-time and fast-time operations have become essential for the correlator to optimum control, optimum prediction and filtering, etc. Generally, correlator has basic three parts; delaying circuit, multiplying circuit and integrating circuit. If input signals have Gaussian distribu tion, the polarity correlation technique can be used and the circuit of three parts become very simple. In this case, however, the signal with general statistical property can not be computed. Relations between polarity correlation function and true correlation function is not linear and is undesirable. Conventional correlator to the signal with general statistical property is very complicated. The new type correlator presented in this paper is able to compute in real time operation the correlation function of the stationary signals with general statistical property. As hybrid analog-digital technique is applied to this correlator, its circuit is very simple.抄録全体を表示PDF形式でダウンロード (1049K) -
野坂 康雄, 田中 晃, 伊藤 朗1964 年 3 巻 3 号 p. 218-223
発行日: 1964/03/10
公開日: 2010/10/21
ジャーナル フリーPDF形式でダウンロード (652K)
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