PROBLEM TO BE SOLVED: To provide an in-pipe travelling device free to travel by efficiently transmitting propulsive force without residing even in a curved pipe. SOLUTION: This in-pipe travelling device 1 is furnished with a plurality of driving units 3 having propulsive means 50, 60 capable of generating the propulsive force in the forwarding direction A from a wall surface by overhanging contact members 53, 63 to the side S roughly orthogonal with the forwarding direction A and making them contact with the wall surface of a conduit run, connecting parts 7 to connect the driving units 3 to each other, having flexibility and free to deform in correspondence with a shape in the axial direction of the conduit run, a connecting state monitoring part free to detect a deforming state of each of the connecting parts 7 and a control part 10 to control the propulsive means 50, 60 of each of the driving units 3 in accordance with a detection result of the connecting state monitoring part. COPYRIGHT: (C)2008,JPO&INPIT

In-pipe travelling device

PURPOSE:To realize a wide linearity and to reduce variation and fluctuation by adopting the constitution that the full reflection is performed by using an emitter follower output in using the difference extraction system in a nonlinear extraction section of the timing of an optical repeater. CONSTITUTION:Since the delay and full reflection by a coaxial line 14 are performed by using an output of the emitter follower circuit 11, it is not required to match the load resistor RL of a differential pair with the impedance of the coaxial line. Since the load resistor RL is increased more than 75OMEGA, the RE is increased to a degree and the wide linearity is obtained. Further, the amplifier circuit uses the differential pair form and the circuit 11 is circuit- integrated and the RL and RE are constituted in the inside of the IC, then the variation of the gain due to component variance and the fluctuation due to temperature change are reduced.

Difference extraction circuit

Manufacture of trimellitic acid polyimide ester

PROBLEM TO BE SOLVED: To investigate beforehand the behavior of a new pipe when being inserted inside an existing pipe, in a pipe-in-pipe construction method. SOLUTION: This in-pipe investigation device for investigating the inside of the existing pipe in the pipe-in-pipe construction method for inserting the new pipe into the inside of the existing pipe is equipped with a first simulation pipe 11 and a second simulation pipe 12 to be inserted into the inside of the existing pipe in the mutually bonded state, having each outer diameter corresponding to the mew pipe, and is also equipped with inspection devices 22, 23, 24 for inspecting relative attitudes of the first simulation pipe 11 and the second simulation pipe 12. COPYRIGHT: (C)2008,JPO&INPIT

In-pipe investigation device

Method of laminating plastic board and fiber sheet

PURPOSE:To store accurate timing information to a 0 consecutive signal even if the Q of a single tuning circuit is low by applying a highly stable clock obtained from a master clock to an identification circuit or the like CONSTITUTION:A part of a transmission signal applied to a terminal 21 is rectified (4) as full-wave A code subjected to full-wave rectification 4 is applied to the single tuning circuit 5, from which the timing component is extracted and the component is converted into the timing clock by a limiter amplifier 6 On the other hand, a transmission signal applied to the terminal 21 is fed to the identification circuit 2, where the signal is subjected to full-wave rectification and a sliced rectangular wave is obtained This rectangular wave is converted into the transmission signal Then a counter circuit 9 starts counting at the trailing of the transmission signal and an output signal is obtained Furthermore, an output signal of an AND circuit 10 and a clock from a master clock circuit 7 are applied to a digital phase-locked circuit 8, where a highly stable clock is extracted and the clock is fed to the circuits 2 and 9

Ueno Norio

Papers

Timing extracting circuit