| 摘要 |
FIELD: measurement equipment.SUBSTANCE: current measurement device comprises the first measurement resistor (1A) to receive the measured current (Is, IsA) and the first amplifier (2A) of a signal, comprising an input connected to the specified first measurement resistor, and an output for provision of the first signal (SA) of measurement. The second measurement resistor (1B) is connected in series with the specified first measurement resistor (1A), and the first facility (6A, 8, 9) of voltage limitation is connected in parallel with the first measurement resistor (1A) to separate the first current (IL1) of a shunt, when the first limit voltage (IL1) is achieved on the specified first measurement resistor (1A). The value of the first measurement resistor (1A) is more than the value of the second measurement resistor (1B), besides, the ratio between the value of the first measurement resistor (1A) and the second measurement resistor (1B) makes from 5 to 15. And also the processing unit comprises at least one specified device for current measurement.EFFECT: provision of a current measurement device that has a wide dynamic measurement range, low input full resistance and simple and reliable structure, provision of a processing unit.2 cl, 4 dwg |
