| 摘要 |
<p>Data collector and analyser hand held device (I) capable of collecting and analysing AC analog signals obtained by both converting pressure waves in the ultrasonic or in the vibration bandwidths into such signals comprising a conditioning circuit (2) comprising a transducer identification circuit (3) arranged for downloading a characteristic of an external transducer and at least a first amplifier (4), arranged for conditioning an AC analog signal at a desired amplitude, a first analog to digital converter (5), a digital signal processing unit (6), a central processing unit (7) and a user interface (26). The first amplifier of the conditioning circuit is a multistage programmable amplifier arranged for enabling the adjustment of its gain between 0 and a predetermined value by the central processing unit as a function of a characteristic of an AC external transducer, downloaded by the identification circuit, transmitted by this circuit to the central processing unit and identified by this unit or of a known characteristic of an AC internal transducer,</p> |
