Sampling measurement data generation apparatus

Details Sampling measurement data generation apparatus Sampling measurement data generation apparatus

1983-08-26

1986-06-10

Chin, Gary

Boots, shoes, and leggings

731173, 250231SE, G06F 1520

Patent

active

045946752

ABSTRACT:
Sampling pulses are obtained by a plurality of sampling through holes which are formed at equal angular intervals in a disc encoder which is fixed to a crankshaft of a piston engine to be measured. An analog output from a pressure sensor for sensing the pressure inside a cylinder is sampled, held by the obtained sampling pulses and converted into a digital signal to provide digital measurement data. The digital measurement data is written into a RAM during a positive period of an internal clock pulse under the control of a direct memory access control circuit and the RAM is accessed by a CPU during a negative period of the internal clock pulse. The digital data read out of the RAM is undergone for the data arithmetic operation by the CPU in the realtime manner.

REFERENCES:
patent: 4081995 (1978-04-01), Griffith et al.
patent: 4271469 (1981-06-01), Kawai et al.
patent: 4308500 (1981-12-01), Avins
patent: 4342025 (1982-07-01), Spalti et al.

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