Device for detecting a gas volume flow

• US 8,109,268 B2
• Filed: 10/29/2007
• Issued: 02/07/2012
• Est. Priority Date: 01/08/2007
• Status: Active Grant

• Current Assignee: Dragerwerk AG & Company KGaA (FPS Vermögensverwaltung GmbH)
• Original Assignee: Drager Medical GmbH (FPS Vermögensverwaltung GmbH)
• Inventors: Gerder, Henning, Kellner, Bernd, Rohde, Kerstin
• Primary Examiner(s): Thanh, Loan
• Assistant Examiner(s): Sheikh, Kathryn D
• Application Number:
  US11/927,031
• Publication Number:
  US 20080167568A1
• Time in Patent Office: 1,562 Days
• Field of Search: 128/204.18, 128/204.21, 128/204.23, 738/612.3, 7386125-86129, 738/613.1, 600/529, 600/538
• US Class Current: 128/204.23
• CPC Class Codes: A61B 5/087 Measuring breath flow
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0063 Compressors
• CPC Class Codes: A61M 16/021 operated by electrical means A61M16/202 – A61M16/205 take precedence
• CPC Class Codes: A61M 2016/0036 in the breathing tube and used in both inspiratory and expiratory phase
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2016/0042 in the expiratory circuit
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/3375 Acoustical, e.g. ultrasonic, measuring means
• CPC Class Codes: G01F 1/662 Constructional details
• CPC Class Codes: G01F 15/18 Supports or connecting means for meters

Abstract

A device is provided for detecting a gas volume flow, especially for a respirator. The device includes a flow sensor, which surrounds a lumen for guiding the gas volume flow, and the flow sensor has an ultrasound transmitter with a sound generator (20) and an ultrasound receiver. The device has a connection sensor (17, 19), which is designed to detect a connection, especially an installation position or correctness of the connection or both, of the ultrasound transmitter to the transmitter mount and/or a connection of the ultrasound receiver to the receiver mount and to change at least one of its electrical properties as a function of the connection, or to generate a connection signal, which represents the connection, and to output this signal on the output side.

Claims

1. A device for detecting a gas volume flow, the device comprising:

a lumen for guiding the gas volume flow;

a flow sensor surrounding said lumen, said flow sensor including an ultrasound transmitter and an ultrasound receiver, said ultrasound transmitter being positionable independently and separately from said ultrasound receiver

a mount associated with said flow sensor, said mount including a transmitter mount defining a transmitter space for receiving said ultrasound transmitter for mounting said ultrasound transmitter, said transmitter mount for separably connecting said mount to said ultrasound transmitter independently of and separately from said ultrasound receiver, and said mount including a receiver mount defining a receiver space for receiving said ultrasound receiver for mounting said ultrasound receiver, said receiver mount for separably connecting said mount to said ultrasound receiver independently of and separately from said ultrasound transmitter, said ultrasound transmitter being arranged in said transmitter space by said transmitter mount at a spaced location from said ultrasound receiver, in said receiver space, such that said ultrasound receiver can receive ultrasound waves transmitted by said ultrasound transmitter and the ultrasound waves pass through said lumen at least in some sections, said mount including a connection sensor for detecting at least one of a physical connection position between said ultrasound transmitter and said transmitter mount and a physical connection position between said ultrasound receiver and said receiver mount, said connection sensor changing at least one electrical property as a function of the physical connection position detected, or generating a connection signal, which represents the physical connection position detected, and providing an output of said at least one electrical property or said connection signal.

2. A device in accordance with claim 1, wherein said connection sensor is a magnetic sensor, including a magnetic sensor part connected to at least one of said ultrasound transmitter and said ultrasound receiver, said magnet sensor for detecting a magnetic field in the area of said transmitter mount and/or said receiver mount.

3. A device in accordance with claim 1, wherein said ultrasound receiver is an ultrasound converter for operation as an ultrasound transmitter and an ultrasound receiver and/or said ultrasound transmitter is an ultrasound converter for operation as an ultrasound receiver and an ultrasound transmitter.

4. A device in accordance with claim 1, wherein at least one of said transmitter space of said transmitter mount and said receiver space of said receiver mount has a conically shaped contact surface.

5. A device in accordance with claim 1, wherein said connection sensor detects said at least one of a physical connection position between said ultrasound transmitter and said transmitter mount and a physical connection position between said ultrasound receiver and said receiver mount without electrical energy passing between said ultrasound transmitter and said transmitter mount and without electrical energy passing between said ultrasound receiver and said receiver mount.

6. A flow sensor comprising:

an ultrasound transmitter;

an ultrasound receiver that is separate from said ultrasound transmitter and is positionable independently and separately from said ultrasound receiver;

a transmitter mount defining a transmitter receiving space for receiving said ultrasound transmitter;

a receiver mount defining a receiver receiving space for receiving said ultrasound receiver, wherein said transmitter mount is separably connected to said ultrasound transmitter independently of said ultrasound receiver and said receiver mount is separably connected to said ultrasound receiver independently of said ultrasound transmitter, at least one of said transmitter mount transmitter receiving space and said receiver mount receiver receiving space having a conically shaped contact surface and at least one of said ultrasound transmitter and said ultrasound receiver having a complementary conically shaped contact surface cooperating with said conically shaped contact surface; and

a connection sensor for detecting at least one of a physical connection position between said ultrasound transmitter and said transmitter mount and a physical connection position between said ultrasound receiver and said receiver mount, said connection sensor changing at least one electrical property as a function of the physical connection position detected, or generating a connection signal, which represents the physical connection position detected, and providing an output of said at least one electrical property or said connection signal.

7. A flow sensor in accordance with claim 6, wherein said connection sensor is a magnetic sensor, including a magnetic sensor part connected to at least one of said ultrasound transmitter and said ultrasound receiver, said magnet sensor for detecting a magnetic field in the area of said transmitter mount and/or said receiver mount.

8. A flow sensor in accordance with claim 6, wherein said transmitter mount and said receiver mount cooperate to form a lumen receiving region, said lumen for guiding a gas volume flow, said transmitter mount and said receiver mount positioning said ultrasound transmitter and said ultrasound receiver relative to said lumen receiving region with said ultrasound transmitter being arranged at a spaced location from said ultrasound receiver such that said ultrasound receiver can receive ultrasound waves transmitted by said ultrasound transmitter and the ultrasound waves pass through said lumen at least in some sections.

9. A flow sensor in accordance with claim 6, wherein said connection sensor detects said at least one of a physical connection position between said ultrasound transmitter and said transmitter mount and a physical connection position between said ultrasound receiver and said receiver mount without electrical energy passing between said ultrasound transmitter and said transmitter mount and without electrical energy passing between said ultrasound receiver and said receiver mount.

10. A respirator comprising:

a lumen defining a gas flow path for guiding a breathing gas volume flow;

an ultrasound transmitter and an ultrasound receiver, said ultrasound transmitter being separate from said ultrasound transmitter and being positionable independently and separately from said ultrasound receiver, said ultrasound transmitter and an ultrasound receiver cooperating to form a flow sensor; and

a flow sensor housing surrounding said lumen, said flow sensor housing comprising a mount associated with said flow sensor, said mount including a transmitter mount defining a transmitter space with an access opening to the transmitter space accessible from outside said flow sensor housing, said transmitter mount for receiving said ultrasound transmitter from outside said flow sensor housing and for separably mounting said ultrasound transmitter in said transmitter space independently of and separately from said ultrasound receiver such that said ultrasound transmitter is directed toward said lumen, and said mount including a receiver mount defining a receiver space with an access opening to the receiver space accessible from outside said flow sensor housing, said receiver mount for receiving said ultrasound receiver from outside said flow sensor housing and for separably mounting said ultrasound receiver in said receiver space independently of and separately from said ultrasound transmitter such that said ultrasound receiver is directed toward said lumen at a spaced location from said ultrasound transmitter, such that said ultrasound receiver can receive ultrasound waves transmitted by said ultrasound transmitter and the ultrasound waves pass through said lumen at least in some sections, said mount including a connection sensor for detecting at least one of a physical connection position of said ultrasound transmitter in said transmitter space and a physical connection position of said ultrasound receiver in said receiver space, said connection sensor changing at least one electrical property as a function of the physical connection position detected, or generating a connection signal, which represents the physical connection position detected, and providing an output of said at least one electrical property or said connection signal.

11. A respirator in accordance with claim 10, wherein said connection sensor is a magnetic sensor, including a magnetic sensor part connected to at least one of said ultrasound transmitter and said ultrasound receiver, said magnet sensor for detecting a magnetic field in the area of said transmitter mount and/or said receiver mount.

12. A respirator in accordance with claim 10, wherein said connection sensor detects said at least one of a physical connection position between said ultrasound transmitter and said transmitter mount and a physical connection position between said ultrasound receiver and said receiver mount without electrical energy passing between said ultrasound transmitter and said transmitter mount and without electrical energy passing between said ultrasound receiver and said receiver mount.

13. A respirator in accordance with claim 10, wherein said ultrasound receiver is an ultrasound converter for operation as an ultrasound transmitter and an ultrasound receiver and/or said ultrasound transmitter is an ultrasound converter for operation as an ultrasound receiver and an ultrasound transmitter.

14. A respirator in accordance with claim 10, wherein at least one of said transmitter space of said transmitter mount and said receiver space of said receiver mount has a conically shaped contact surface.

15. A respirator in accordance with claim 10, wherein said transmitter mount and said receiver mount cooperate to form a lumen receiving region, said transmitter mount and said receiver mount positioning said ultrasound transmitter and said ultrasound receiver relative to said lumen receiving region with said ultrasound transmitter being arranged at a spaced location from said ultrasound receiver such that said ultrasound receiver can receive ultrasound waves transmitted by said ultrasound transmitter and the ultrasound waves pass through said lumen at least in some sections.