| 摘要 |
The present invention concerns a method of controlling and/or regulating a metering pump comprising a drive motor having a shaft driven by the motor and a displacement member arranged in a metering head, in which the rotary movement of the shaft is converted into an oscillating movement of the displacement member, wherein the displacement member, interacting with an outlet and inlet valve in alternate sequence, leads to a pump stroke (pressure stroke) and an intake stroke and thus to delivery of a medium to be metered. To provide a method of controlling and/or regulating a metering pump, which in principle manages without a position sensor on the thrust rod and can establish the metering behaviour of the pump with a high degree of precision, according to the invention it is proposed that at least one motor operating parameter, preferably a motor voltage U or a motor current I, is measured, at least one regulating parameter is calculated from the measured motor operating parameters and optionally further known motor characteristics, the at least one regulating parameter is compared to a predetermined guide parameter, and a comparison signal dependent on the result of the comparison is outputted, and can be used as a status, actuating and/or regulating signal.
|
