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1. 发明专利

CA1261046A DUAL-WAVELENGTH LASER APPARATUS 未知
公开(公告)号：CA1261046A
公开(公告)日：1989-09-26
申请号：CA505030
申请日：1986-03-25
申请人： TOKYO GAS CO LTD
发明人： UEHARA KIYOJI , TANAKA HIROAKI , UEKI TAKASHI , TAI HIDEO
IPC分类号： G01N21/39 , H01S3/00 , H01S3/08 , H01S3/101 , H01S3/105 , H01S3/106 , H01S3/139 , H01S5/0683 , H01S5/14 , H01S5/40 , H01S3/10
摘要： A dual-wavelength laser apparatus includes a laser emitting a laser beam consisting of two wavelength components, a methane cell for controlling and equalizing gains of the two wavelength components, a cavity length modulator including a piezoelectric element for periodically modulating the cavity length of the laser, and a feedback circuit for controlling the modulation center such that the sum of outputs of the two modulated wavelength components is kept substantially constant. The feedback circuit includes a detector for detecting a laser output, a lock-in amplifier for detecting and amplifying an output from the detector, an integrator for integrating an output from the lock-in amplifier, and a high-voltage amplifier for generating a bias voltage set by the integrator.

2. 发明专利

CA2038980A1 GAS DETECTION DEVICE 未知
公开(公告)号：CA2038980A1
公开(公告)日：1991-09-28
申请号：CA2038980
申请日：1991-03-25
申请人： TOKYO GAS CO LTD
发明人： UEHARA KIYOJI , TANAKA HIROAKI , MATSUURA MASAYUKI , TAI HIDEO
IPC分类号： G01N21/39 , G02B3/00 , G01N21/25
摘要： The present invention relates to a gas detection device which comprises a laser which generates a laser beam of wave length and intensity corresponding to a drive current and the temperature, and a laser drive circuit which modulates the drive power source of the laser at a specified amplitude centered around a specified temperature and a specified current value with a means of stabilizing the wavelength by which the central wavelength of the laser beam generated by the laser is stabilized at a specific position on a special gas absorption line. The device also comprises a beam detection apparatus which detects the intensity of the laser beam after the laser beam passes through the measuring object gas atmosphere, and a measuring means which performs a quantitative measurement of a specific gas based on the output of the beam detection apparatus.

3. 发明专利

DE3676530D1 未知
公开(公告)号：DE3676530D1
公开(公告)日：1991-02-07
申请号：DE3676530
申请日：1986-03-25
申请人： TOKYO GAS CO LTD
发明人： UEHARA KIYOJI , UEKI TAKASHI , TANAKA HIROAKI , TAI HIDEO
IPC分类号： G01N21/39 , H01S3/00 , H01S3/08 , H01S3/101 , H01S3/105 , H01S3/106 , H01S3/139 , H01S5/0683 , H01S5/14 , H01S5/40 , G01N21/25
摘要： There is disclosed a dual-wavelength laser apparatus including a laser emitting a laser beam consisting of two wavelength components, a methane cell for controlling and equalizing gains of the two wavelength components, a cavity length modulator including a piezoelectric element for periodically modulating the cavity length of the laser, and a feedback circuit for controlling the modulation center such that the sum of outputs of the two modulated wavelength components is kept substantially constant. The feedback circuit includes a detector for detecting a laser output, a lock-in amplifier for detecting and amplifying an output from the detector, an integrator for integrating an output from the lock-in amplifier, and a high-voltage amplifier for generating a bias voltage set by the integrator.

4. 发明专利

JPH08256323A TWO-WAY COMMUNICATION METHOD UTILIZING COMMUNICATION CHANNEL AND PLURAL TV BROADCASTS 失效
公开(公告)号：JPH08256323A
公开(公告)日：1996-10-01
申请号：JP5909895
申请日：1995-03-17
申请人： TOKYO GAS CO LTD
发明人： TANAKA HIROAKI , KOJIMA TERUHISA
IPC分类号： H04N7/10 , H04M11/06 , H04N7/173 , H04N21/2668
摘要： PURPOSE: To reduce a communication wait time to the utmost in the 2-way communication method utilizing communication channels and TV broadcasts. CONSTITUTION: Plural TV broadcast stations 6a-6n as means for sending information are used for a network. Upon the receipt of an information request from a customer 1, a broadcast station management center 4 selects a TV broadcast station 6i providing a least wait time and an information management center 5 serves the requested information to the customer 1 by superimposing the information to a broadcast wave from the broadcast station.

5. 发明专利

JPH08140067A METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING STILL PICTURE INFORMATION DURING TV BROADCASTING 失效
公开(公告)号：JPH08140067A
公开(公告)日：1996-05-31
申请号：JP27679594
申请日：1994-11-10
申请人： TOKYO GAS CO LTD , NIPPON EISEI HOSO KK
发明人： TANAKA HIROAKI , KOJIMA TERUHISA
IPC分类号： H04N7/08 , H04N7/081 , H04N21/258 , H04N21/442 , H04N21/4722 , H04N7/173
摘要： PURPOSE: To input and broadcast still pictures during a general TV broadcasting, so that they are outputted in a household and arbitrarily displayed on a TV screen. CONSTITUTION: At the time preparing general TV broadcasting pictures, by a still picture information transmission means 1, a still picture information frame is prepared by utilizing one frame, the prepared still picture information frame is inputted and broadcasted in general broadcasting picture frame at a frequency for not obstructing the viewing of the TV broadcast and extraction signals for the still picture information frame are sent out simultaneously. On the side of a TV receiver 3, only the still picture information frame is extracted by the extraction signals, the extracted still picture information frame is tentatively recorded in a recording means 5 and still picture information is arbitrarily displayed on the screen of a TV 7 by using a display means 6.

6. 发明专利

JPH0548857B2 失效
公开(公告)号：JPH0548857B2
公开(公告)日：1993-07-22
申请号：JP23755785
申请日：1985-10-25
申请人： TOKYO GAS CO LTD
发明人： TAI HIDEO , UEKI TAKASHI , TANAKA HIROAKI
IPC分类号： G01N21/39 , G01N21/59

7. 发明专利

JPH0441768B2 失效
公开(公告)号：JPH0441768B2
公开(公告)日：1992-07-09
申请号：JP4786484
申请日：1984-03-13
申请人： TOKYO GAS CO LTD
发明人： TANAKA HIROAKI , SAKURAI KOZO , MATSURA MASAYUKI , UEKI TAKASHI , TAGUCHI FUJITAKA
IPC分类号： F17D5/06 , G01M3/24

8. 发明专利

JPH03154101A METHOD AND DEVICE FOR CONTROL USING NEURAL NETWORK SYSTEM 失效
公开(公告)号：JPH03154101A
公开(公告)日：1991-07-02
申请号：JP29112789
申请日：1989-11-10
申请人： TOKYO GAS CO LTD
发明人： TANAKA HIROAKI
IPC分类号： G05B13/02
摘要： PURPOSE:To control with high accuracy quantities which vary with time by utilizing a neural network system as a control system for processing a time series signal. CONSTITUTION:A pressure signal outputted from a measuring means 12 is inputted to an input signal terminal of a sample and hold circuit constituted of a shift register 14, and data P0 - Pn in the shift register 14 are inputted simultaneously, and also, in parallel to an input layer of a neurocomputer 20 through a differentiating means 16, an integrating means 17 and other function processing means 18 or directly. Subsequently, a neuron of an intermediate layer and an output layer executes a judgement of a proportional control action a derivative control action and an integral control action of the control and their combination, that is, the operation, outputs an opening increase/decrease signal or a maintaining signal of a valve, and inputs it to a valve operating mechanism 24. In such a way, the quantity which is varied hourly can be held with high accuracy in a target value by a learning function being a feature of a neural network system.

9. 发明专利

JPS62290190A TWO-WAVELENGTH OSCILLATION LASER DEVICE 失效
公开(公告)号：JPS62290190A
公开(公告)日：1987-12-17
申请号：JP13179386
申请日：1986-06-09
申请人： TOKYO GAS CO LTD
发明人： UEHARA KIYOJI , TANAKA HIROAKI , UEKI TAKASHI , TAI HIDEO
IPC分类号： H01S5/068 , H01S5/0687 , H01S5/40
摘要： PURPOSE:To obtain the two-wavelength oscillation laser of simple constitution and control by using a laser which generate laser beams having corresponding wavelengths and output to a drive current and generating the laser beams of two different wavelengths by use of two different drive currents and applying feedback to the drive currents so as to make a modulation frequency component of the laser beams zero. CONSTITUTION:When a semiconductor laser 1 is driven by a current I1 and I2 (I2 > I1) with a current 10 as center, laser beams of wavelengths lambda1 and lambda2 are generated from the semiconductor laser 1. The wavelength lambda2 component is absorbed by methane in a methane cell 3 and by selecting a methane pressure properly, it can be made nearly the same as an output of the wavelength lambda1 component. A part of the laser beam output is detected by an optical sensor 5 and a modulation frequency component of that is detected by a lock-in amplifier 6 and is integrated by an integrator 8. A current control circuit 9 modulates the drive current between I1 and l2 at an oscillation frequency of an oscillator 7. When the modulation frequency component becomes zero by a feedback effect, a bias current I0 of a laser drive circuit 10 is retained and the oscillation is continued.

10. 发明专利

JPS6247377A GAS BLOCKING APPARATUS 失效
公开(公告)号：JPS6247377A
公开(公告)日：1987-03-02
申请号：JP18794585
申请日：1985-08-27
申请人： MATSUSHITA ELECTRIC IND CO LTD , TOKYO GAS CO LTD
发明人： SHIMADA TAKUO , SAKA TATSUO , UNO TAKASHI , TANAKA HIROAKI
IPC分类号： F17D5/06 , A62C2/04

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