# US 2014/0360248 A1 · Gas bubble sensing device with two ultrasonic emitters connected to one ultrasonic signal generator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360248 A1 - Document ID: US20140360248A1 - Status: Published application - Kind: A1 - Application number: 14/300,675 - Filed: 2014-06-10 - Published: 2014-12-11 - Earliest claimed: 2013-06-11 - Assignees: SONOTEC Ultraschallsensorik Halle GmbH - Applicants: SONOTEC Ultraschallsensorik Halle GmbH - Inventors: TOBIAS FRITSCHE; SANTER ZUR HORST-MEYER; HANS-JOACHIM MÜNCH - Web page: https://patentgrep.com/patent/US20140360248A1 ## CPC - G01N 29/02: Analysing fluids (using acoustic emission techniques G01N29/14 {; constructional or flow details for analysing fluids G01N29/222; optoacoustic fluid cells G01N29/2425}) - G01N 29/024: by measuring propagation velocity or propagation time of acoustic waves - G01N 29/348: {with frequency characteristics, e.g. single frequency signals, chirp signals (measuring frequency of mechanical vibrations or acoustic waves in general G01H1/06, G01H3/04; measuring frequency or analysing frequency spectra G01R23/00)} - G08B 21/18: Status alarms (G08B21/02 takes precedence) - G01N 2291/02433: Gases in liquids, e.g. bubbles, foams - G01N 2291/02466: Biological material, e.g. blood - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS ## Abstract The invention relates to a gas bubble sensing device (1) for sensing gas bubbles in a liquid. In order to provide a reliable detection of inadmissible gas bubbles at minimum cost and required installation space, the invention provides that the gas bubble sensing device (1) comprises two ultrasonic emitters (2, 3), which are both connected to one ultrasonic signal generator (10) in a signal transmitting manner. ## Claims ### Claim 1 Gas bubble sensing device (1) for sensing gas bubbles in a liquid, with a flow through channel (6) for a liquid, two ultrasonic emitters (2, 3) and two ultrasonic receivers (4, 5), wherein the emitters (2, 3) are each arranged opposite of one of the receivers (4, 5) with respect to the flow through channel (6), and with two signal processing devices (11, 12), each of which being connected to one of the receivers (4, 5) in a signal transmitting manner, characterized by an ultrasonic signal generator (10) that is connected to both of the emitters (2, 3) in a signal transmitting manner. ### Claim 2 (depends on 1) Gas bubble sensing device (1) according to claim 1, characterized in that the emitters (2, 3) are arranged on one side and the receivers (4, 5) are arranged on another side opposite the one side of the flow through channel (6). ### Claim 3 (depends on 1) Gas bubble sensing device according to claim 1, characterized by two control devices (13, 14) that are each connected to one of the signal processing devices (11, 12) in a signal transmitting manner, wherein one of the control devices (13, 14) comprises an output port (15), at which it provides a synchronization signal during operation. ### Claim 4 (depends on 3) Gas bubble sensing device (1) according to claim 3, characterized in that the output port (15) is connected to the ultrasonic signal generator (10) in a synchronization signal transmitting manner. ### Claim 5 (depends on 3) Gas bubble sensing device (1) according to claim 3, characterized in that the ultrasonic signal generator (10) is adapted to emit an ultrasonic signal pulse (42) based on the synchronization signal (33). ### Claim 6 (depends on 3) Gas bubble sensing device (1) according to claim 3, characterized in that one of the control devices (13) is adapted to output a fault signal in case an ultrasound pulse (42) is not received within a predetermined time period. ### Claim 7 (depends on 3) Gas bubble sensing device (1) according to claim 3, characterized in that the output port 15 is connected to the other one of the control devices (14) in a synchronization signal transmitting manner. ### Claim 8 (depends on 7) Gas bubble sensing device (1) according to claim 7, characterized in that the other one of the control devices (14) is adapted to output a fault signal in case the synchronization signal (33) is not received within a predetermined time period (37). ### Claim 9 (depends on 3) Gas bubble sensing device (1) according to claim 3, characterized in that the other one of the control devices (14) is adapted to output a fault signal in case an ultrasound pulse (42) is not received within a predetermined time. ### Claim 10 (depends on 6) Gas bubble sensing device (1) according to claim 6, characterized in that the fault signal corresponds to a gas bubble alarm signal. ### Claim 11 (depends on 3) Gas bubble sensing device (1) according to claim 3, characterized by two watchdog devices (24, 25) for monitoring the functional capability of the two control devices (13, 14). ### Claim 12 (depends on 3) Gas bubble sensing device (1) according to claim 3, characterized by two voltage control devices for monitoring power supplies for the signal processing devices (11, 12) and/or the control devices (13, 14).