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1. 发明专利

JPS60188819A Liquid level detecting device 失效
标题翻译：液位检测装置
公开(公告)号：JPS60188819A
公开(公告)日：1985-09-26
申请号：JP4521784
申请日：1984-03-08
申请人： Hitachi Cable Ltd
发明人： OOHATA YUTAKA
IPC分类号： G01F23/292 , G01F23/56 , G01F23/68
CPC分类号： G01F23/686
摘要： PURPOSE:To detect a liquid level of any liquid by placing opposingly a photodetecting optical fiber provided with a photodetector, through a window glass of the side wall of a liquid tank, to a light sending optical fiber provided in a floating on a liquid surface. CONSTITUTION:A light sending optical fiber 6 is provided in a floating plate 4 interlocking with a liquid 2 on the liquid surface in a liquid tank 1 and also sliding along the liquid tank 1, and a photodetecting optical fiber 7 having a photodetector 8 is placed so as to be opposed to the fiber 6, through a window glass 3 of the side wall of the liquid tank 1. In this way, a liquid level can be detected without making the fiber 6 contact to the liquid 2.
摘要翻译：目的：通过将设置有光电检测器的受光光纤通过液槽的侧壁的窗玻璃相对放置在浮置在液面上的发光光纤相对地检测任何液体的液面。构成：将发光光纤6设置在与液罐1的液面上的液体2互锁并且沿着液罐1滑动的浮动板4中，并且放置具有光电检测器8的光电检测光纤7 以便通过液体罐1的侧壁的窗玻璃3与纤维6相对。以这种方式，可以检测液位而不使纤维6与液体2接触。

2. 发明专利

JPS5927266A Current measuring apparatus using polarization plane-preserving optical fiber 失效
标题翻译：使用偏光平面保护光纤的电流测量装置
公开(公告)号：JPS5927266A
公开(公告)日：1984-02-13
申请号：JP13658082
申请日：1982-08-05
申请人： Hitachi Cable Ltd
发明人： OOHATA YUTAKA , KAJIOKA HIROSHI , IIZUKA TOSHIO , WATARI TATSU
IPC分类号： G01R15/24
CPC分类号： G01R15/246
摘要： PURPOSE:To achieve a proper stability respect to external force and temperature characteristic of the light source along with a high accuracy by arranging incident and emission side polarization preserving optical fibers on a transmission path to receive incident light from a branch unit with light receiving element through two polarizers. CONSTITUTION:Light from a light source 11 is made linear polarized light with a polarizer 12 and a 1/2 wavelength plate 13 enters an incident side polarization plane preserving optical fiber 14 at an azimuth the same as in one axial direction. The linear polarized light propagated through the fiber 14 passes through a Faraday rotation element 16 as parallel beam with a rod lens 17 at the emission end and enters an emission side polarization plane preserving optical fiber 19 with a rod lens 18. Light from the fiber 19 is made to enter a branch unit 20 for the polarization plane preserving optical fiber and divided into two parts, which are respectively received with light receiving elements 23 and 24 through two polarizers 21 and 22 with the azimuths respectively aligning two axes of the fiber 19. This ensures a proper stability respect to external force and temperature characteristic of a light source along with a high accuracy.
摘要翻译：目的：通过将入射和发射侧偏振保持光纤布置在传输路径上以通过光接收元件通过分支单元接收入射光来实现对光源的外力和温度特性的适当稳定性以及高精度两个偏振器。构成：将来自光源11的光作为偏振片12的直线偏振光，1/2波长板13在与轴向一致的方位角处入射保持光纤14的入射侧偏振面。通过光纤14传播的线性偏振光通过作为发射端的棒状透镜17的平行光束的法拉第旋转元件16，并且通过棒状透镜18进入保留光纤19的发射侧偏振面。来自光纤19的光进入用于偏振面保存光纤的分支单元20，并被分成两部分，分别通过两个偏振器21和22分别由光接收元件23和24接收，方位分别对准光纤19的两个轴。这确保了对光源的外力和温度特性的适当稳定性以及高精度。

3. 发明专利

JPS58109823A DETECTING METHOD OF HEATING MATTER 失效
公开(公告)号：JPS58109823A
公开(公告)日：1983-06-30
申请号：JP20875081
申请日：1981-12-23
申请人： HITACHI CABLE
发明人： OOHATA YUTAKA , ISHIKAWA KAZUNORI
IPC分类号： G01J1/42 , G01J5/30
摘要： PURPOSE:To obtain a detecting signal of high accuracy, by detecting the shift of a heating matter by a photoelectric transducer like a PbS cell, etc. to shape the waveform of the detected shift of the heating matter, differentiating the detecting signal to obtain rise and fall pulses and reproducing again the square pulse through an FF circuit. CONSTITUTION:A square pulse (a) is generated from a PbS call 1, and the width is proportional to the moving direction and the height of the pulse (a) is proportional to the temprature of a steel lump respectively. The signal (a) produces a pulse waveform (b) corresponding to the rise and fall through a differentiating circuit 4 which is held between voltage follower circuit 3a and 3b and then produces a peak waveform (c) through an amplifier 5. A branch pulse (d) enters an inverter 7a via a voltage follower 3c, and a negative pulse (e) is converted into a positive pulse (g) by a polarity inverting amplifier 6 to be fed to an inverter 7b. Waveforms (h) and (k) are fed to an FF8, and as a result a square pulse (l) is delivered. A relay driving circuit works suitably by the output signal (l) to control the phase of a heating matter.

4. 发明专利

JPS60120271A MAGNETIC FIELD SENSOR 失效
公开(公告)号：JPS60120271A
公开(公告)日：1985-06-27
申请号：JP22938683
申请日：1983-12-05
申请人： HITACHI CABLE
发明人： KANAMARU KIMIHARU , OOHATA YUTAKA
IPC分类号： G01R15/24 , G01R33/032 , G02F1/09
摘要： PURPOSE:To obtain a compact optical magnetic sensor excellent in handling property and having high accuracy, by forming a reciprocal light path by arranging a polarizer, a Faraday element, an optical rotation element and a reflective plate to the leading end of one optical fiber. CONSTITUTION:A Faraday element 3 is arranged to a polarized beam spliter 1, and an optical rotation element 2 and a dielectric reflective film 6 are formed to the outer surface thereof. The light of a LED light source 4 enters the splitter 1 through an optical fiber 7 and, when linearily polarized and passes the element 3, a polarization angle is rotated in proportion to the intensity of a magnetic field. When transmitted light reciprocally passes the optical rotation element 2, a polarization surface is rotated by 45 deg. and, when further passes the element 3 and the splitter 1 again, returned to the optical fiber 7. Therefore, light havin intensity returning to the optical fiber 7 enters a light receiving element 5 by a half mirror 9 and an electric signal amplified by an amplifier 10 is separated into a DC component and an AC component by an active filter 13. When operation of (AC component)/(DC component) is performed by a divider 14, output is obtained. A magnetic field can be measured on the bases of this output.

5. 发明专利

JPS58160882A THERMAL BODY DETECTOR 失效
公开(公告)号：JPS58160882A
公开(公告)日：1983-09-24
申请号：JP4341682
申请日：1982-03-18
申请人： HITACHI CABLE
发明人： TAKAHASHI KAZUO , OOHATA YUTAKA
IPC分类号： G01V8/16 , G01J5/08
摘要： PURPOSE:To obtain a highly reliable thermal body detector which deals easily with the size of a line and that of a thermal body by providing a thermal body detection head with a hood for adjusting the size of a spot. CONSTITUTION:At a terminal part of an optical fiber 7, a metallic cable 9 is provided and the metallic case 9, a lens 6 and its periphery define the detection head. The detection head is coupled with an optical receiver 8 and a heat-resistive tube 10 is provided covering the optical fiber 7. The detection head is provided with the hood for adjusting the size of the spot and the hood 11 is freely detachable or expansible and contractible. Consequently, the spot size is adjustable by the attachment and detachment, or expansion and contraction of the hood without moving the detection head itself.

6. 发明专利

JPS5617311A MANUFACTURE OF IMAGE GUIDE 失效
公开(公告)号：JPS5617311A
公开(公告)日：1981-02-19
申请号：JP9281179
申请日：1979-07-20
申请人： HITACHI CABLE
发明人： OOHATA YUTAKA
IPC分类号： C03B37/00 , G02B6/04
摘要： PURPOSE:To obtain products of excellent quality easily at low cost by closely bundling many optical fibers by elastic members over vibrations while combing down them so that they will not get twisted. CONSTITUTION:A required number of optical fiber elements 1 of required length are put together and their end parts are fixed by adhesives 2, for example, so that they will not fall apart from one another. So that optical fibers will not get twisted, comb-tooth member 3 is arranged at at least one point and while vibrations are applied in various directions, they are closely wound with elastic members 4 by pressing. Products of excellent quality, even when fibers are long-sized, can be obtained easily and inexpensively which have fibers at both terminals made to correspond to each other.

7. 发明专利

JPS562535A GAS LEAKAGE DETECTOR USING OPTICAL FIBER 失效
公开(公告)号：JPS562535A
公开(公告)日：1981-01-12
申请号：JP7858579
申请日：1979-06-21
申请人： HITACHI CABLE
发明人： OOHATA YUTAKA
IPC分类号： G01N21/35
摘要： PURPOSE:To detect propane gas, coal gas, etc., at the normal temperature without wrong information by providing a light source emitting infrared light of specific wavelength, a photodetector detecting it, and a reflex mirror reflecting sent light and then by connecting them by bundles of transmitting and receiving optical fibers. CONSTITUTION:Infrared light from light source 1 such as LED emitting monochromatic light of 34mum in absorption wavelength is made to strike transmitting optical fiber 3 via filter 2. The light is reflected by reflex mirror 4 and then strikes receiving optical fiber 5. The reflected light having propagated through receiving optical fiber 5 strikes photodetector 6 such as a thermistor, which converts it into an electric signal. In this case, when propane gas, coal gas, or the like resides in space 7 extending from the transmitting optical fiber to the receiving optical fiber via the reflex mirror, it is absorbed as much as its density. Consequently, the density of the gas can be detected and further since the optical fibers are used, flexibility is provided, so that detection will be possible at a narrow place.

8. 发明专利

JPS54152429A CONTACT INFORMATION INPUT CIRCUIT 失效
公开(公告)号：JPS54152429A
公开(公告)日：1979-11-30
申请号：JP6078878
申请日：1978-05-22
申请人： HITACHI CABLE
发明人： ASAI TAKAHIRO , KONDOU ISAO , SATOU TERUTSUGU , OOHATA YUTAKA
IPC分类号： G06F3/02 , H03K5/00 , H03K5/13
摘要： PURPOSE:To improve noise-suppression effect by interposing a switch circuit composed of diodes in addition to the combination of a pull-up resistance and a low- noise filter. CONSTITUTION:When relay contact 1 is broken, diodes 8 and 9 are both OFF and an input voltage to IC gate 2 is held at the voltage (+5) of power terminal 3. External noises, made at the transmission line between relay contact 1 and resistance 11, are cut off by diodes. With relay contact 1 made, diodes 8 and 9 thru ON by the negative power supply connected to terminal 12 and although the cathode potential of diode 9 is reversely biased by a forward voltage drop, setting resistances 4 and 5 to adequate values decreases the input to IC gate 2 down to OV. Since diode 9 is ON, external noises are suppressed here.

9. 发明专利

JPS60188820A Liquid level measuring device 失效
标题翻译：液位测量装置
公开(公告)号：JPS60188820A
公开(公告)日：1985-09-26
申请号：JP4521884
申请日：1984-03-08
申请人： Hitachi Cable Ltd
发明人： OOHATA YUTAKA
IPC分类号： G01F23/292 , G01F23/56 , G01F23/68
CPC分类号： G01F23/686
摘要： PURPOSE:To measure a liquid level of any liquid by placing oppositely an optical fiber sheet which has coupled an image sensor to its output terminal, through a condenser lens and window glass, to a light sending optical fiber in a floating plate on a liquid surface. CONSTITUTION:A light sending optical fiber 7 is provided in a floating plate following up a liquid level on the liquid surface in a liquid tank 1, and an optical fiber sheet 8 is placed so as to be opposed to the fiber 7 through a condenser lens 5 and a glass window 3 of the side wall of the liquid tank 1. Subsequently, an output part 10 is coupled to an image sensor 9 coupled to an output terminal of the sheet 8, and the output part 10 is constituted by connecting an address/ voltage converting circuit 10c through an address detecting circuit 10b to an identification circuit 10a of a photodetecting signal from the sensor 9. In this way, a liquid level can be measured by the fiber interposing the plate 4.
摘要翻译：目的：通过将图像传感器耦合到其输出端的光纤片，通过聚光透镜和窗玻璃相对放置在液面上的浮板中的发光光纤，来测量任何液体的液位。构成：将发光光纤7设置在液晶盒1的液面上的浮置板上，并且将光纤片8放置成通过聚光透镜与纤维7相对 5和液体箱1的侧壁的玻璃窗3.随后，输出部分10耦合到耦合到片材8的输出端子的图像传感器9，并且输出部分10通过连接地址 /电压转换电路10c通过地址检测电路10b发送到来自传感器9的光电检测信号的识别电路10a。以这种方式，可以通过插入板4的光纤来测量液位。

10. 发明专利

JPS59225372A OPTICAL MAGNETIC FIELD SENSOR 失效
公开(公告)号：JPS59225372A
公开(公告)日：1984-12-18
申请号：JP10054083
申请日：1983-06-06
申请人： HITACHI CABLE
发明人： OOHATA YUTAKA
IPC分类号： G02B6/00 , G01R33/032 , G02F1/09
摘要： PURPOSE:To obtain a sensor easy to operate with a better temperature characterisitic using one poptical fiber for input and output of light each by arranging a means so that an output from a magnetic field sensor is converted into electricity from light and then, the output voltage is separated into the DC and AC components to determined the ratio therebetween. CONSTITUTION:Light from a light source 1 enters a magnetic field sensor 5 passing through an optical fiber 2a. The magnetic field sensor 5 comprises polarization plates 3a and 3b and a Faraday element 4 interposed therebetween and the polarization surfaces of the polarization plates 3a and 3b are arranged at 45 deg. to each other. Light passing through the magnetic sensor 5 is converted into electricity with a light receiving element 6 and fed to a DC current transformation separation circuit 7. Then, when it is sent to a division circuit 8 for computation, the final output voltage is in noway related to the P0. In addition, as the DC and AC components of an input light to the light receiving element 6 both pass through the same optical path, the optical coupling loss in the magnetic field sensor 5 and the transmission loss in an optical fiber 2b are both the same completely. Besides, as the coefficient of the photoelectric conversion is the same, the values of the AC component v/DC component V is free from errors due to effects of the temperature change and the bending of an optical fiber 2.

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