Sensor collect is measured the information of parameter is changed into telegraphic date, via filter wave purify interference evacuation enters multichannel imitate switch; By odd the signal one by one that chases road choosing to connect imitate switch to input each the passageway sends a machine amplifier of programmed control gain, the converter of D of ／ of signal classics A after enlarge is changed into corresponding pulse signal evacuation to enter sheet piece in machine; Odd the initial value of instrument place set has a machine ground corresponding data operation and processing (be like nonlinear corrective wait for) ; The result of operation is changed to be relevant data to undertake show and be printinged; At the same time odd a machine operation result and memory at piece inside FlashROM(shines fast memory) or E 2PROM(report but erasure puts store implement) after the set parameter inside undertakes operation is compared, according to operation result and control requirement, the control signal with corresponding output (if warning decice sparks, relay the) such as contact. In addition, intelligent apparatus is OK still measure with pattern of cloth of PC series part control a system, by sheet piece machine as issue a machine to collect all sorts of measurement signal and data, transmit information through serial communication go up a machine -- PC, have global government by the PC.
2, the functional characteristic of intelligent apparatus
As the ceaseless development of microelectronics technology, compositive CPU, memory, timer / tally, run paralell and serial interface, watchdog, preamplifier even the circuit such as converter of A of ／ of A ／ D, D is in the VLSI chip on a chip (namely odd a machine) appeared. With sheet piece machine give priority to body, the computer technology and measure control technology to be united in wedlock together, comprised again so called " intelligence is changed survey control system " , namely intelligent apparatus.
Compare with photograph of traditional instrument appearance, intelligent apparatus has characteristic of the following function:
① operates automation. Of the instrument whole if choice of clavier scanning, span, switch is started,measure a process close, the collection of data, transmit with processing and show print wait to use sheet piece machine or small controller will control an operation, implementation measures all automation of the process.
② is had measure a function oneself, include automatic zero, automatic breakdown and condition to examine, automatic calibration, diagnose oneself reach span automatic changeover. Intelligent appearance can detect automatically the position that gives trouble even the reason of breakdown. This kind can start fortune to go in the instrument from the test, also can move in instrument job at the same time, went to the lavatory greatly the maintenance of the instrument.
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