Pulsation attenuator for a fluidic system
A pulsation attenuator for a fluidic system with a fluidic pump. The pulsation attenuator includes a fluidic channel, a first fluidic device adapted to attenuate pulsations with a shallow rolloff slope, and a second fluidic device adapted to attenuate pulsations with a shallow rolloff slope. The first fluidic device and the second fluidic device are connected to the fluidic channel such that they cooperatively attenuate pulsations with a steep rolloff slope. Preferably, the first fluidic device includes a first fluidic resistor and a first fluidic capacitor, and the second fluidic device includes a second fluidic resistor and a second fluidic capacitor. Preferably, the pulsation attenuator is arranged, similar a second-order low-pass filter, in the following order: (1) first fluidic resistor, (2) first fluidic capacitor, (3) second fluidic resistor, and (4) second fluidic capacitor.
1. A pulsation attenuator for a fluidic system with a fluidic pump, comprising:
a fluidic channel;
a first fluidic device adapted to attenuate pulsations with a shallow rolloff slope; and
a second fluidic device adapted to attenuate pulsations with a shallow rolloff slope;
wherein the first fluidic device and the second fluidic device are connected to the fluidic channel such that they cooperatively attenuate pulsations with a steep rolloff slope.
2. A pulsation attenuator for a fluidic system with a fluidic pump, comprising:
a fluidic channel;
a first fluidic device connected to the fluidic channel and adapted to attenuate pulsations; and
a second fluidic device connected to the fluidic channel and adapted to attenuate pulsations;
wherein the first fluidic device and the second fluidic device are adapted to attenuate pulsations above a cutoff frequency.
3. The pulsation attenuator of claim 2 , wherein the cutoff frequency is less than or equal to 10 Hz.
4. A pulsation attenuator for a fluidic system with a fluidic pump, comprising:
a fluidic channel;
a first fluidic device connected to the fluidic channel and adapted to attenuate pulsations; and
a second fluidic device connected to the fluidic channel and adapted to attenuate pulsations;
wherein the first fluidic device includes a first fluidic resistor and a first fluidic capacitor, and wherein the second fluidic device includes a second fluidic resistor and a second fluidic capacitor.
5. The pulsation attenuator of claim 4 , wherein the first fluidic resistor and the second fluidic resistor include a serpentine-type fluidic resistor.
6. The pulsation attenuator of claim 4 , wherein the first fluidic resistor and the second fluidic resistor include a ball-type fluidic resistor.
7. The pulsation attenuator of claim 4 , wherein the first fluidic capacitor and the second fluidic capacitor include an accumulator-type fluidic capacitor.
8. The pulsation attenuator of claim 4 , wherein the first fluidic capacitor and the second fluidic capacitor include a flexible tube-type fluidic capacitor.
9. The pulsation attenuator of claim 4 , wherein the pulsation attenuator is arranged in the following order: (1) first fluidic resistor, (2) first fluidic capacitor, (3) second fluidic resistor, and (4) second fluidic capacitor.
10. A pulsation attenuator for a fluidic system with a fluidic pump, comprising:
a fluidic channel;
a first fluidic device adapted to attenuate pulsations with a shallow rolloff slope; and
a second fluidic device adapted to attenuate pulsations with a shallow rolloff slope;
wherein the first fluidic device and the second fluidic device are connected to the fluidic channel such that they cooperatively attenuate pulsations with a steep rolloff slope;
wherein the first fluidic device is adapted to attenuate pulsations with a rolloff slope of less than or equal to 20 dB/decade, and the second fluidic device is adapted to attenuate pulsations with a rolloff slope of less than or equal to 20 dB/decade.
11. The pulsation attenuator of claim 10 , wherein the first fluidic device and the second fluidic device are connected to the fluidic channel such that they cooperatively attenuate pulsations with a rolloff slope greater than 20 dB/decade.
12. The pulsation attenuator of claim 11 , wherein the first fluidic device and the second fluidic device are connected to the fluidic channel such that they cooperatively attenuate pulsations with a rolloff slope greater than or equal to 40 dB/decade.
13. A fluidic system for a flow cytometer comprising: a fluidic pump and the pulsation attenuator of claim 1 .
14. The fluidic system of claim 13 wherein the pump is a peristaltic pump.
15. A fluidic system for allow cytometer comprising:
a fluidic pump;
a fluidic channel;
a first fluidic device adapted to attenuate pulsations with a shallow rolloff slope; and
a second fluidic device adapted to attenuate pulsations with a shallow rolloff slope;
wherein the first fluidic device and the second fluidic device are connected to the fluidic channel such that they cooperatively attenuate pulsations with a steep rolloff slope;
wherein the first fluidic device and the second fluidic device are adapted to attenuate pulsations above a cutoff frequency.
16. The fluidic system of claim 15 , wherein the cutoff frequency is less than or equal to 10 Hz.
17. A fluidic system for allow cytometer comprising:
a fluidic pump;
a fluidic channel;
a first fluidic device adapted to attenuate pulsations with a shallow rolloff slope; and
a second fluidic device adapted to attenuate pulsations with a shallow rolloff slope;
wherein the first fluidic device and the second fluidic device are connected to the fluidic channel such that they cooperatively attenuate pulsations with a steep rolloff slope;
wherein the first fluidic device includes a first fluidic resistor and a first fluidic capacitor, and wherein the second fluidic device includes a second fluidic resistor and a second fluidic capacitor.
18. The fluidic system of claim 17 , wherein the pulsation attenuator is arranged in the following order: (1) first fluidic resistor, (2) first fluidic capacitor, (3) second fluidic resistor, and (4) second fluidic capacitor.
19. A fluidic system for allow cytometer comprising:
a fluidic pump;
a fluidic channel;
a first fluidic device adapted to attenuate pulsations with a shallow rolloff slope; and
a second fluidic device adapted to attenuate pulsations with a shallow rolloff slope;
wherein the first fluidic device and the second fluidic device are connected to the fluidic channel such that they cooperatively attenuate pulsations with a steep rolloff slope;
wherein the first fluidic device is adapted to attenuate pulsations with a rolloff slope of less than or equal to 20 dB/decade, and the second fluidic device is adapted to attenuate pulsations with a rolloff slope of less than or equal to 20 dB/decade.
20. The fluidic system of claim 19 , wherein the first fluidic device and the second fluidic device are connected to the fluidic channel such that they cooperatively attenuate pulsations with a rolloff slope greater than 20 dB/decade.
21. A fluidic system for a flow cytometer comprising: a fluidic pump and the pulsation attenuator of claim 2 .
22. The fluidic system of claim 21 wherein the pump is a peristaltic pump.
23. A fluidic system for a flow cytometer comprising: a fluidic pump and the pulsation attenuator of claim 4 .
24. The fluidic system of claim 23 wherein the pump is a peristaltic pump.
25. A fluidic system for a flow cytometer comprising: a fluidic pump and the pulsation attenuator of claim 10 .
26. The fluidic system of claim 25 wherein the pump is a peristaltic pump.