阅读说明：本技术 用于确定植入式血管支持系统的区域中的流体中的声速的方法和系统 (Method and system for determining the speed of sound in a fluid in a region of an implantable vascular support system ) 是由 托马斯·亚历山大·施勒布施 托比亚斯·施密德 于 2019-06-06 设计创作，主要内容包括：本发明涉及一种用于确定植入式血管支持系统(2)的区域中的流体(1)中的声速的方法,包括以下步骤：a)借助于超声传感器(4)发射超声信号(3),b)在至少一个声反射器(5)上反射所述超声信号(3),所述至少一个声反射器布置在所述超声传感器(4)的视场(6)中,并且在至少距所述超声传感器(4)或距另一声反射器(5)的限定距离处,c)接收反射的超声信号(8),d)使用所述反射的超声信号(8)确定所述流体中的声速。(The invention relates to a method for determining the speed of sound in a fluid (1) in the region of an implantable vascular support system (2), comprising the following steps: a) emitting an ultrasonic signal (3) by means of an ultrasonic sensor (4), b) reflecting the ultrasonic signal (3) on at least one acoustic reflector (5) which is arranged in a field of view (6) of the ultrasonic sensor (4) and at a defined distance at least from the ultrasonic sensor (4) or from another acoustic reflector (5), c) receiving the reflected ultrasonic signal (8), d) determining the speed of sound in the fluid using the reflected ultrasonic signal (8).)

1. Method for determining the speed of sound in a fluid (1) in a region of an implantable vascular support system (2), comprising the steps of:

a) an ultrasonic signal (3) is transmitted by means of an ultrasonic sensor (4),

b) reflecting the ultrasonic signal (3) on at least one acoustic reflector (5) which is arranged in a field of view (6) of the ultrasonic sensor (4) and at a defined distance at least from the ultrasonic sensor (4) or from another acoustic reflector (5),

c) receiving the reflected ultrasonic signal (8),

d) -determining the speed of sound in the fluid using the reflected ultrasonic signal (8).

2. The method according to claim 1, wherein the ultrasound signal (3) is reflected on at least two acoustic reflectors (5) arranged at different distances (7) from the ultrasound sensor (4).

3. The method according to claim 1 or 2, wherein the at least one acoustic reflector (5) has an acoustic impedance that is larger than the maximum acoustic impedance of the fluid (1) or smaller than the lowest acoustic impedance of the fluid (1).

4. The method according to any of the preceding claims, wherein the at least one acoustic reflector (5) is embedded in an embedding material (9).

5. The method of any preceding claim, wherein the speed of sound is determined using an analysis algorithm based on the time of flight of the pulses.

6. The method of any of the above claims, wherein speed of sound is determined using an FMCW based analysis algorithm.

7. The method of claim 6, wherein a beat frequency is determined.

8. A system for determining the speed of sound in a fluid (1) in a region of an implantable vascular support system (2), comprising:

an ultrasonic sensor (4) arranged in or on the support system (2),

-at least one acoustic reflector (5) arranged in a field of view (6) of the ultrasonic sensor (4) and at a defined distance at least from the ultrasonic sensor (4) or from another acoustic reflector (5).

9. The system according to claim 8, wherein at least two acoustic reflectors (5) are arranged at different distances (7) from the ultrasonic sensor (4).

10. The system according to claim 8 or 9, wherein the at least one acoustic reflector (5) is embedded in an embedding material (9).

11. A system according to any one of claims 8 to 10, wherein an analysis unit is provided which stores a pulse time of flight based analysis algorithm.

12. The system according to any one of claims 8 to 11, wherein an analysis unit is provided which stores an FMCW based analysis algorithm.

13. Implantable vascular support system (2) comprising a system for determining the speed of sound according to any of claims 8 to 12.