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    • 82. 发明专利
    • DECODING CONTROL SYSTEM OF VIDEO TELEPHONE SYSTEM
    • JPH04360485A
    • 1992-12-14
    • JP16253391
    • 1991-06-07
    • MITSUBISHI PRECISION CO LTD
    • MUNAKATA IKUO
    • H04M11/06H04M7/08H04N7/14
    • PURPOSE:To correctly display the receiving image by deciding that the frame sent first is a first frame and permitting the displaying of the decoding image when the coding for one frame starting from a picture starting code is all the coding in the frame. CONSTITUTION:A resetting control part 11, when it detects the start of communication, resets a frame detecting part 9. A video output control part 2 displays the blank for a TV device 1 from the start of the communication. A receiving side interface part receives the image data sent through a public telephone line 5 and delivers them to a decoding part 3 and a detecting part 7. The detecting part 7 detects the picture starting code in the image data and resets a counter 8. The decoding part 3 recognizes that the detection is the head of the frame and starts the decoding. When the coding of one block is all the code in the frame, the counter 8 adds one. The detecting part 9, when the part 9 reads the value of the counter 8 and the value is equal to the number of the block to form one frame, decides that the first frame is a first frame and permits to display the decoding image.
    • 85. 发明专利
    • OPTICAL FIBER GYROSCOPE
    • JPH04339212A
    • 1992-11-26
    • JP11148391
    • 1991-05-16
    • MITSUBISHI PRECISION CO LTD
    • TADA HIROHIKO
    • G01C19/72
    • PURPOSE:To contribute to a highly accurate detection of a rotary angular velocity by maintaining better linearity of a gyroscope output and stability of a scale factor while increasing resolution of an angle increment pulse as gyroscope output even when a wider dynamic range is covered without the switching of a range in changes in frequency of a saw-tooth signal while a change in temperature or the like occurs in an optical fiber gyroscope. CONSTITUTION:This apparatus includes a signal processing section 40 which generates a data corresponding to a phase difference of light by Sagnac effect, a circuit section 50 adapted to set the frequency of a serrodyne modulation signal A15 digitally based on the data, an addition means 62 to accumulate a frequency data D4 set and a counter means 66 which generates a digital saw-tooth wave correspondence signal d8 algebraically adding + or -1 to the contents of the addition results when the result overflows. A specified bit other than the highest-order bit of the digital saw-tooth wave correspondence signal data is extracted as gyroscope output.
    • 86. 发明专利
    • OPTICAL FIBER GYROSCOPE
    • JPH04283616A
    • 1992-10-08
    • JP4682791
    • 1991-03-12
    • MITSUBISHI PRECISION CO LTD
    • TADA HIROHIKO
    • G01C19/72
    • PURPOSE:To cover a wide dynamic range without range-change when the frequency of a sawtooth-wave signal is changed and to maintain the excellent linearity of the output of a gyroscope and the stability of a scale factor even if temperature change and the like occur with respect to a serrodyne-modulation type closed-loop optical fiber gyroscope having the wide dynamic range. CONSTITUTION:A signal processing part 40 generates data corresponding to the phase difference in light caused by a Sagnac effect. A circuit part 50 digitally sets the frequency of a serrodyne-modulation sawtooth signal A15 based on the generated data. A sawtooth wave signal generating part 60 generates a sawtooth wave signal based on the digitally set frequency data D4. These parts are provided. The sawtooth wave signal generating part is made to use a direct synthesizing digital synthesizer method, and the closed loop is formed as the entire constitution.
    • 88. 发明专利
    • SIGHT DIRECTION DETECTING DEVICE
    • JPH04128783A
    • 1992-04-30
    • JP24881990
    • 1990-09-20
    • MITSUBISHI PRECISION CO LTD
    • SATO SHUNICHISATO KENJI
    • G09B9/32G01J1/02G01J1/04
    • PURPOSE:To accurately detect sight direction from the absolute position of a watching point on a screen by providing an infrared ray detecting means for detecting the light spot position of a near infrared light projected on the screen through an infrared ray projecting means. CONSTITUTION:A laser light projecting device 13 constituted of a near infrared semiconductor laser and an optical system for collimating the laser light are installed on the upper part of the helmet 12 of a trainee 11. The position of the face of the trainee 11 sitting in the pilot seat of a simulation cockpit 14 exists nearly in the center of a dome screen 15. The near infrared light from the helmet 12, which is collimated, is projected on the screen 15, the infrared-ray detecting means 19 detects the near infrared light spot on the screen, and a coordinate transforming means 110 transforms the position information detected by the infrared-ray detecting means 19 into an appropriate co-ordinate system. Thus, the absolute position of the watching point of the trainee can easily be detected.
    • 89. 发明专利
    • SIGNAL TREATMENT DEVICE FOR OPTICAL GYRO
    • JPH0476415A
    • 1992-03-11
    • JP18942590
    • 1990-07-19
    • MITSUBISHI PRECISION CO LTD
    • KUROKAWA AKIHIRO
    • G01C19/72H01S3/083
    • PURPOSE:To eliminate the variation of a scale factor by outputting an angle increment output signal with a digital synthesizer from a signal in proportion to an input rotation angular velocity. CONSTITUTION:A phase modulator drive signal 8 is outputted and also an analogue signal 10 and digital signals 11 - 13, synchronizing with the signal 8 and having a frequency fm, are outputted in a reference signal generation circuit 35, and the said signals 10 and 11 - 13 are supplied to heterodyne mixers 9d and 9a - 9c respectively. The frequency fm, 2fm, and 4fm components of a photoelectric transfer output signal 7 are converted into a digital signal via the mixers 9a - 9c and an A/D converter 18, and are digitally modulated via digital multiplication means 20a and 20b. In a rotation angular velocity operation means 30, operation is made from an operation value, operated from the outputs of the means 20a and 20b and a phase modulation factor operation means 31, and digital signals 29a and 29b outputted from a quadrant discrimination means 28, and a gyro output signal 33 is outputted. A signal 33 is inputted and angle increment signals 38a and 38b are outputted in a digital synthesizer 34.
    • 90. 发明专利
    • SIMULATION FLIGHT SYSTEM
    • JPH0459497A
    • 1992-02-26
    • JP16987890
    • 1990-06-29
    • MITSUBISHI PRECISION CO LTD
    • NARASAKI MASARU
    • F41G7/00B64C13/18G05B13/02
    • PURPOSE:To have proper and flex anticipation of plane meeting 'by grasping the relative position relationship between a plane concerned and any plane as target using fuzzy control. CONSTITUTION:In a simulation flight system, in which the meeting point of a plane concerned 12 with any plane as target 11 can be anticipated, the target plane 11 continues to be in constant sped linear motion with no change in its current attitude. It is assumed, therefore, that the velocity vector Ve of the target plane 11 does not change, while an assumption is made for the plane concerned 12 so that its heading and path angle can be modified (altered) instantly. The relative position relationship between the two planes 11, 12 is grasped by fuzzy control, nd the plane meeting point in the stabilization axis coordinates system of the target plane 11 is determined from the position, velocity and attitude of the target plane 11 and the position and velocity of taxis plane concerned 12. This is followed by determining the heading modification angle (heading error) of the plane concerned 12 and its path modification angle (path angle error). The bank angle, incidence angle, and thrust force are controlled so that these two errors nullify.