摘要:
An electrical sensor device, particularly a pressure sensor device, comprises at least one pressure transducer, (11 to 14), particularly a thick-film transducer, connected to a monitoring circuit (10) arranged to output an electrical signal (V) which is variable in dependence on the pressure (p), an interface circuit (15 to 17) connected to the monitoring circuit (10) and arranged, in response to the said signal (V), to present an output resistance which increases or decreases in accordance with a predetermined response curve, on increase in the pressure (p) detected by the transducers.
摘要:
In a system (1) for recharging electric accumulators (2), including a polyphase alternator (3) connected to a rectifier circuit (7), and a voltage regulator circuit (6) connected to the rectifier circuit (7) and the field winding (4) of the alternator (3), there is connected a circuit (9) for detecting and indicating faults and operating anomalies. This circuit (9) includes a signal processor circuit (10) which is connected to the armature winding (5) of the alternator (3) and is operable to provide an output test signal substantially proportional to the mean value of the signal appearing, in operation, at the actual or virtual star point of the phases of the armature winding (5) of the alternator (3). Generator means (11) provide first and second predetermined reference output signals. A comparison circuit (12) activates 3 1arm signalling means (13) when the test signal falls below the first reference signal, and when the test signal exceeds the second reference signal.