| 摘要 |
<p>PURPOSE:To easily obtain the accumulated volume in an accumulator by measuring the operational pressure of the accumulator and the work load of an electric motor and inputting these measured values to a processing equipment for calculation. CONSTITUTION:A pressure sensor 4 for measuring the operational pressure of accumulator 3 is provided in a liquid pressure circuit 2 and a work load sensor 11 is connected to an electric motor 10 for driving a liquid pressure pump 9. Output from the pressure sensor 4 and that from the work load sensor 11 are inputted to a processing equipment COM and the cumulated volume in the accumulator is calculated based on a relation between the operational pressure of the accumulator 3 and the work load of the electric motor 10. Thus, the cumulated volume in the accumulator 3 can be easily obtained.</p> |
