Boots – shoes – and leggings
Patent
1981-11-02
1984-01-17
Krass, Errol A.
Boots, shoes, and leggings
73 11, 356375, 364550, 364579, G01M 1704
Patent
active
044266839
ABSTRACT:
A control system for a pneumatically powered shock testing machine is presented which utilizes digital logic and an operator programmed computer. The control system was implemented on a shock machine having a carriage assembly that is lifted by an air piston to a specified height above an anvil plate, then accelerated downward until the carriage impacts a shock generator element resting on the anvil. An optically encoded guide rod is attached to the side of the carriage. As the carriage moves up and down, an optical sensor attached to the machine base monitors motion of the guide rod. The measure of this motion is forwarded to a microcomputer. Secondly, charge air pressure used to provide downward acceleration of the carriage is measured by a transducer and this information is also relayed in digital form to the microcomputer. From these two inputs, the microcomputer generates instructions to sequence solenoid actuated valves which operate the various sections of the charge cylinder assembly. The microcomputer includes a microprocessor, several read only memories, a random access memory and the necessary support logic and interface signal drivers and amplifiers. Its function is to process the data from the optical and pressure sensors and therefrom initiate closed loop control of the shock machine in accordance with instructions programmed in by the operator at a control panel.
REFERENCES:
patent: 2580299 (1951-12-01), Hunicke
patent: 4271475 (1981-06-01), Sahajdak
patent: 4365306 (1982-12-01), House et al.
Avco Corporation
Krass Errol A.
McNair, Jr. Robert J.
Ogman Abraham
Tager Clifford L.
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