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    • 44. 发明申请
    • PULSE COUNTER
    • WO2021224084A1
    • 2021-11-11
    • PCT/EP2021/061087
    • 2021-04-28
    • CEJN AB
    • UPPSTRÖM, DanielROTTGARDT, FrankEKSTRÖM, JörgenOLSSON, Anna-Lena
    • G01L23/06
    • A pulse counter for counting fluid pressure changes is disclosed. The pulse counter comprises a first housing part (10); a second housing part (20) comprising a fluid passage (22), the first housing part (10) being separate from the second housing part (20); a circuit board (30) within the two housing parts (10, 20), the circuit board (30) comprising a light pulse transmitter (32) and a light pulse receiver (34); a battery (40) within the two housing parts (10, 20), the battery (40) supplying electric power to the light pulse transmitter (32) and the light pulse receiver (34); a rod (50) slidably arranged between the first housing part (10) and the second housing part (20), with one end (52) of the rod (50) within the fluid passage (22), and another end (54) of the rod (50) arranged for at least partly breaking a light pulse (33) between the light pulse transmitter (32) and the light pulse receiver (34); and a spring (60) forcing the rod (50) away from the light pulse (33) and towards the fluid passage (20). A method for counting fluid pulses using such a pulse counter is also disclosed. The method comprises setting (510) the pressure level that moves the rod (50) to at least partly break the light pulse (33) by setting the force of the spring (60) and by selecting a diameter (58) of the end (52) of the rod (50) within the fluid passage (20).