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1. 发明专利

DE3472011D1 RADIOACTIVE CONCENTRATION MEASURING APPARATUS 未知
公开(公告)号：DE3472011D1
公开(公告)日：1988-07-14
申请号：DE3472011
申请日：1984-07-05
申请人： HITACHI LTD
发明人： KITAGUCHI HIROSHI , FUJII MASAAKI
IPC分类号： G01T1/167 , G01T7/02 , G21F9/00
摘要： This invention relates to an apparatus for measuring the radioactive concentration of a radioactive material-containing liquid. In order to improve the measuring sensitivity of and miniaturize the apparatus, it includes a vertically-disposed outer cylinder, an inner cylinder disposed in and concentrically with the outer cylinder, a radiation detector disposed in the inner cylinder, a radioactive liquid feed means for supplying a radioactive material-containing liquid in the form of an annular current into an annular space between the inner and outer cylinders, a first cleaning water feed means for supplying a cleaning liquid along the inner surface of the outer cylinder, and a second cleaning water feed means for supplying a cleaning liquid along the outer surface of the inner cylinder. The cleaning water prevents the radioactive material from being deposited on the inner surface of the outer cylinder and the outer surface of the inner cylinder, and the measuring sensitivity of the apparatus from decreasing.

2. 发明专利

DE3174213D1 APPARATUS FOR MEASURING CONCENTRATION OF RADIOACTIVITY 未知
公开(公告)号：DE3174213D1
公开(公告)日：1986-04-30
申请号：DE3174213
申请日：1981-11-26
申请人： HITACHI LTD
发明人： KITAGUCHI HIROSHI , KUDO MASASHI , FUJII MASAAKI
IPC分类号： G01T1/167 , G01T7/02 , G21C17/00 , G21C17/02
摘要： An apparatus for measuring the concentration of radioactivity in a radioactive fluid discharged from a nuclear power plant. The apparatus comprises a radioactivity concentration measurement pipe arranged to extend vertically, fluid supplying means for supplying the fluid into the measurement pipe in such a manner that the fluid flows down through the measurement pipe along the axis of the measurement pipe without contacting the inner surface of the latter, radioactivity concentration measuring means disposed at the outside of the measurement pipe for measuring the radioactivity concentration in the fluid flowing in the measurement pipe, and means for discharging the radioactive fluid to the outside of the measurement pipe. The apparatus further comprises a gas supply pipe opening at its one end to the atmosphere and communicated at its other end with the inside of the measurement pipe, and a check valve disposed in the gas supply pipe and operated at a pressure higher than the atmospheric pressure. When the pressure in the measurement pipe has come down below the atmospheric pressure, the check valve is operative to always maintain the internal pressure in the measurement pipe at the atmospheric pressure, thereby to prevent the fluid level in the measurement pipe from being raised to reduce the background noise during the measurement of the radioactivity concentration.

3. 发明专利

JPH0685125B2 失效
公开(公告)号：JPH0685125B2
公开(公告)日：1994-10-26
申请号：JP7675287
申请日：1987-03-30
申请人： HITACHI LTD
发明人： SUZUKI MASANORI , IWATSUKA NOBUYOSHI , TOMIZAWA FUMIO , SENOO MAKOTO , FUJII MASAAKI
IPC分类号： G05D3/12 , B25J3/00 , B25J9/16 , G05B19/18

4. 发明专利

JPH0660793A LINEAR CATHODE AND ELECTRON GUN USING THE CATHODE 失效
公开(公告)号：JPH0660793A
公开(公告)日：1994-03-04
申请号：JP317592
申请日：1992-01-10
申请人： HITACHI LTD , LASER NOSHUKU GIJUTSU KENKYU , NEW JAPAN RADIO CO LTD , HITACHI NUCLEAR ENG
发明人： SHIBATA SATORU , FUJII MASAAKI , MANO HIDETAKA , INOUE ATSUSHI
IPC分类号： H01J1/28 , H01J1/20
摘要： PURPOSE:To efficiently transmit the heat generated in a heating filament to a cathode. CONSTITUTION:A cylindrical insulator 20 is arranged in parallel close to a lengthy cathode body 2. The insulator 20 has an opening part 20a on the side opposed to the cathode body 2, so that the heat of a heating filament 1 provided in the insulator 20 can be transmitted to the cathode body 2 as a radiation heat. The cathode body 2 is formed of a material having a barium compound impregnated in the hole of a polar tungsten base, which can generate electrons at a comparatively low temperature.

5. 发明专利

JPH0139544B2 失效
公开(公告)号：JPH0139544B2
公开(公告)日：1989-08-22
申请号：JP3057682
申请日：1982-03-01
申请人： HITACHI LTD
发明人： KITAGUCHI HIROSHI , FUJII MASAAKI
IPC分类号： G01T1/167 , B01J47/14 , G01N1/02 , G01N1/10 , G01T7/04 , G21C17/00 , G21C19/307

6. 发明专利

JPS6218038B2 失效
公开(公告)号：JPS6218038B2
公开(公告)日：1987-04-21
申请号：JP2791880
申请日：1980-03-07
申请人： HITACHI LTD
发明人： KAMYA KUNIO , FUJII MASAAKI
IPC分类号： G21C17/07 , G21C17/06

7. 发明专利

JPS6135340A Method and device for measuring thermal property value of suspended particle 失效
标题翻译：用于测量悬浮颗粒的热物性值的方法和装置
公开(公告)号：JPS6135340A
公开(公告)日：1986-02-19
申请号：JP15533784
申请日：1984-07-27
申请人： Hitachi Ltd
发明人： KITAMORI TAKEHIKO , FUJII MASAAKI
IPC分类号： G01N29/00 , G01N25/18 , G01N29/24 , G01N29/34
CPC分类号： G01N29/346 , G01N25/18 , G01N29/2418 , G01N2291/012 , G01N2291/02408 , G01N2291/102
摘要： PURPOSE:To measure thermal property values of suspended particles such as heat transfer coefficient and specific heat with high accuracy by scanning a suspension at a modulation frequency for incident light intensity and detecting the phase of an opto- acoustic signal. CONSTITUTION:Argon laser beam from a laser 5 is inputted to an acousto-optic type optical modulator 6 to modulates its intensity. Then, zero order diffracted light is inputted to an optical monitor 7. Further, primary diffracted light is inputted to a measuring cell 8. Then, a signal is sent from an oscillator 11 to a driver 10 to adjust the frequency and waveform of the modulation of the acousto-optic type optical modulator 6. An opto-acoustic signal from the measuring cell 8 is inputted to a lock-in amplifier 13 and inputted to a microcomputer 15. Then, an equation derived by analyzing the frequency characteristic of the phase of the opto-acoustic signal is used to measure the phase phi and optical modulation frequency (f) of the opto-acoustic signal. Then, thermal property values of suspended particles such as specific gravity sigmas, specific heat Cps, radius (d), and heat transfer coefficient (h) are calculated from them. The heat transfer coefficient (h) is easily calculated, specially, when particle components are known. Thus, thermal property values of the suspended particles are measured with high accuracy.
摘要翻译：目的：通过以调制频率对入射光强度进行扫描并检测光声信号的相位，以高精度测量传热系数和比热等悬浮颗粒的热性能值。构成：将来自激光器5的氩激光束输入到声光型光调制器6，以调制其强度。然后，将零级衍射光输入到光学监视器7.此外，一次衍射光被输入到测量单元8.然后，将信号从振荡器11发送到驱动器10，以调整调制的频率和波形声光型光调制器6.将来自测量单元8的光声信号输入到锁定放大器13并输入到微机15.然后，通过分析相位的频率特性光声信号用于测量光声信号的相位phi和光调制频率（f）。然后，从它们计算比重像素，比热Cps，半径（d）和传热系数（h）等悬浮粒子的热特性值。传热系数（h）很容易计算，特别是当已知颗粒成分时。因此，高精度地测定悬浮粒子的热特性值。

8. 发明专利

JPS60183825A MULTIPLEX TRANSMITTER 失效
公开(公告)号：JPS60183825A
公开(公告)日：1985-09-19
申请号：JP3886384
申请日：1984-03-02
申请人： HITACHI LTD
发明人： KITAGUCHI HIROSHI , FUJII MASAAKI , KAWASAKI SATOSHI , KITAMORI TAKEHIKO , KONDOU MASAHIRO
IPC分类号： H04B3/00 , H04J3/00
摘要： PURPOSE:To identify an input channel of plural input signals by transmitting one input signal while being branched at two systems of inherent addition delay system and addition non-delay system, applying the same processing to a signal of the non-delay system at a transmission destination as the delay processing of the addition delay system executed at a transmitter and synchronizing the signal with a signal of the addition delay system. CONSTITUTION:Input signals D1-Dn of each channel are divided into systems of an addition delay unit 10 and an adder 11 and transmitted on two systems of transmission lines 14, 15. The transmission signals of the two systems are connected to a delay synchronism unit 12 at the transmission destination and the same delay processing as the addition delay unit 10 is applid to an output signal of an adder 11 of the transmission sender (d1=d1', d2=d2', dn=dn'). A signal is extracted from each delay circuit of the delay synchronism unit 12 and synchronized (AND circuit 13) with the transmission signal through the addtion delay unit 10 at the transmitter. The input signals D1-Dn of each channel are assigned to output signals C1-Cn corresponding to each channel by the synchronism processing.

9. 发明专利

JPS6053833A APPARATUS FOR DETECTING IMPURITY PARTICLE 失效
公开(公告)号：JPS6053833A
公开(公告)日：1985-03-27
申请号：JP16045183
申请日：1983-09-02
申请人： HITACHI LTD
发明人： KITAMORI TAKEHIKO , FUJII MASAAKI
IPC分类号： G01N21/00 , G01N21/17 , G01N29/00
摘要： PURPOSE:To measure the radius of a particle and the numerical density of impurity particles in a fluid directly, by performing computation, based on the phase difference between a photo- acoustic signal from a measuring cell, which is filled with a fluid sample, and a reference signal, and a photo-acoustic signal, which is induced by scattered light due to the impurity particles in the fluid sample. CONSTITUTION:Incident light with intensity I, which is modulated by an acoustooptic means, is inputted to a measuring cell, which is filled with a fluid including impurities, whose particle radius is (d) and numerical density is N. A phase difference phi' between a photo-acoustic signal when output light has a peak value and the photo-acoustic signal of the input light, which is to become a reference signal, is detected. The radius (d) is excellently computed based on an expression I in correspondence with one-dimensional value even though the radius is small. Meanwhile, thermal elastic waves are generated in a detector by the scattered light due to particles in the detector of the measuring cell. The photo-acoustic signal Sd, which is induced by the thermal elastic waves, is detected. The numerical density N of the impurities is determined by an expression II. In this way, the particle radius and the numerical density of the impurity particles in the fluid can be directly measured. In the expressions, k1 and k2 are constants, (f) is a light modulating frequency, R is a distance between a light axis and the detector, and (v) is light speed in fluid.

10. 发明专利

JPS59126933A Opto-acoustic analyzing device 失效
标题翻译： OPTO-ACOUSTIC分析装置
公开(公告)号：JPS59126933A
公开(公告)日：1984-07-21
申请号：JP114083
申请日：1983-01-10
申请人： Hitachi Ltd
发明人： KITAMORI TAKEHIKO , FUJII MASAAKI , TSUKADA KATSUO , TOOYAMA YOSHIO
IPC分类号： G01N21/00 , G01N15/02 , G01N29/00
CPC分类号： G01N15/02
摘要： PURPOSE:To measure simultaneously the grain size distribution and concn. of suspended components by detecting and analyzing the intensity and phase of the opto-acoustic signal obtd. by projecting modulating light to a suspension. CONSTITUTION:A suspension of a sample is sealed in a measuring cell 8, and the pulsed light 7 obtd. by modulating laser light 5 from an argon laser 4 with an acousto-optic modulator 6 is irradiated thereto. The suspended particles emit a heat flow flux by absorbing the light 7 and generates a photo-acoustic signal 9 in a medium. The signal 9 is converted to an electrical signal by a piezoelectric element 14 and the signal is amplified with a lock-in amplifier 11. The intensity of said signal is inputted to a microcomputer 12 while the phase thereof is scanned with the reference signal 10 from an optical modulator 6 as a reference. The microcomputer 12 records the data on the phase and intensity in a two- dimensional arrangement and calculates the grain size from the data on the phase and the data in the intensity. The result thereof is outputted to a recorder 13.
摘要翻译：目的：同时测量晶粒尺寸分布和浓度。通过检测和分析光声信号的强度和相位来分析悬挂组件。通过将调制光投影到悬架上。构成：将样品的悬浮液密封在测量池8中，并且脉冲光7被吸收。通过用声光调制器6对来自氩激光器4的激光5进行调制。悬浮的颗粒通过吸收光7发射热流通量，并在介质中产生光声信号9。信号9被压电元件14转换成电信号，并且用锁定放大器11放大信号。所述信号的强度被输入到微型计算机12，其相位用参考信号10从光调制器6作为参考。微型计算机12以二维排列方式记录关于相位和强度的数据，并从相位上的数据和强度中的数据计算出粒度。其结果输出到记录器13。

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