US 11,701,465 B2
Sensor system
Christoph Erlen, Kassel (DE)
Assigned to B. Braun Melsungen AG, Melsungen (DE)
Appl. No. 16/616,054
Filed by B. BRAUN MELSUNGEN AG, Melsungen (DE)
PCT Filed May 22, 2018, PCT No. PCT/EP2018/063385
§ 371(c)(1), (2) Date Nov. 22, 2019,
PCT Pub. No. WO2018/215465, PCT Pub. Date Nov. 29, 2018.
Claims priority of application No. 10 2017 111 301.0 (DE), filed on May 23, 2017.
Prior Publication US 2020/0390972 A1, Dec. 17, 2020
Int. Cl. A61M 5/168 (2006.01); A61M 39/28 (2006.01); F04B 43/12 (2006.01); G01B 7/00 (2006.01)
CPC A61M 5/16813 (2013.01) [A61M 39/284 (2013.01); F04B 43/12 (2013.01); G01B 7/003 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A sensor system with contactless sensors for a volumetric pump operating according to the linear peristalsis principle, which detects the position of a front flap relative to a housing of the volumetric pump, comprising:
at least one sensor unit;
at least one sensor transmitter unit; and
a sensor output signal processing unit, wherein:
the sensor transmitter unit is arranged to apply a detection variable varying as a function of a travel position to the sensor unit along a predetermined travel along which a fixedly arranged sensor unit mounted on the housing and a movably arranged sensor transmitter unit mounted on the front flap or a movably arranged sensor unit mounted on the front flap and a fixedly arranged sensor transmitter unit mounted on the housing are moving relative to each other,
the sensor unit is configured to output a detection signal corresponding to a particular travel position of the front flap on the basis of the varying detection variable,
the sensor output signal processing unit is arranged to receive the detection signal output by the sensor unit and to discriminate at least three travel positions of the front flap on the basis of the received detection signal,
the at least three travel positions comprise a closed position in which a tube portion inserted in the pump is occluded, an open position in which the tube portion inserted in the pump is not occluded and an intermediate position provided between the closed position and the open position,
the sensor output signal processing unit is arranged to perform a plausibility check of the detection signal based on time behavior of the detection signal, and
the sensor output signal processing unit is configured to evaluate the travel position by adjusting the dynamics of the detection signal to a model of the time behavior.