| The work of this thesis is part of the project for developing gauge of asphalt content and moisture content of soil. The gauge is composed of detecting room and control box. The thesis has made a brief introduction of the principle of how to measure asphalt content and moisture content of soil by using neutrons and also made a introduction of the detecting room structure. Otherwise, in order to realize the intelligence, portability and on-the-spot application of the instrument, the thesis has studied systematically the electronic circuit system with the chip microprocessors controlled , and this system has been made a control box--one of independent units. Especially, in addition, a corresponding control-software (control-program) has been programmed using ASM , and the thesis has made a brief description of every module of the program and has drawn the flow chart of every module. At last, this thesis also shows the experimental data of measuring asphalt content, it shows obviously that the tester is fit in with applicable needs, so that it can realize the gauge's computer control, automation, miniaturization, portability and on-the-spot application. |
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