Vortex street problem

OP, are they the signal pulses output after measurement by a vortex flow meter? If so, it is related to the amount of traffic, and it’s difficult to adjust. If there is an error, adjust the zero point first.

In my opinion, the original poster should be able to change the flow rate corresponding to each pulse by altering the vortex street frequency, thereby adjusting the flow rate range. For example: 5000Hz corresponds to 10,000 cubic meters, so one pulse represents 2 cubic meters ； If 5,000 Hz corresponds to 50,000 cubic meters, then one pulse represents 5 cubic meters. I’m not sure if my understanding is correct; it’s just for reference.

I think what was said upstairs is a bit problematic! What was mentioned above actually refers to frequency output, rather than pulse output. If it were pulse output, you would need to define how much flow each pulse represents; this value can be called pulse equivalent. For example, 1 m3/p means that one pulse is generated for every cubic meter of flow. Pulse output is mainly used for accumulation. It should be noted that most instruments have an upper limit on the pulse frequency they can output, which is different from the frequency of the output signal. In other words, it determines how many pulses an instrument can generate per second. If this upper limit is 100Hz and the pulse equivalent is 0.5 m3/p, then when the flow rate exceeds 50 cubic meters per second, the pulse output will exceed this limit, affecting the proper functioning of the instrument. The solution in such cases is to adjust the pulse equivalent. However, it cannot be set too large either; if it is too large, the real-time performance may suffer, for example, it is not good to output a pulse every 10 seconds. Therefore, the key to pulse output is to provide the instrument with an appropriate pulse equivalent – the frequency should neither be too high nor too low!