# US 2026/0185531 A1 · Method for Information Exchange Between an External Recipient and a Pump > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0185531 A1 - Document ID: US20260185531A1 - Status: Published application - Kind: A1 - Application number: 19/124,736 - Filed: 2023-10-12 - Published: 2026-07-02 - Earliest claimed: 2022-10-28 - Assignees: KSB SE & Co. KGaA - Applicants: KSB SE & Co. KGaA - Inventors: Daniel GONTERMANN; Patrick HAUCK; Christoph KOEHLER; Benedikt MUELLER; Jochen SCHAAB; Patrick SCHMITT; Sebastian MEISINGER - Web page: https://patentgrep.com/patent/US20260185531A1 ## CPC - F04D 15/0088: {Testing machines} - F04D 27/00: Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids - F04D 25/06: the pump being electrically driven (F04D25/08 takes precedence) - H02K 11/35: Devices for recording or transmitting machine parameters, e.g. memory chips or radio transmitters for diagnosis - F05D 2270/333: Noise or sound levels - F05D 2270/335: Output power or torque - F05D 2270/71: synthesized, i.e. parameter computed by a mathematical model - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract A method for information exchange between an external receiver and a pump includes providing an electric motor as pump drive and a frequency inverter for the speed-regulated control of the motor. The pump generates an acoustic information signal that is detectable by the external receiver. The method also includes varying at least one operating parameter of the frequency inverter while the pump is operating normally, in such a manner that the pump, while it is operating normally, delivers an acoustic information signal that is detectable by the external receiver. ## Claims ### Claim at position 1 1-13. (canceled) ### Claim 14 A method for information exchange between an external receiver and a pump comprising: providing an electric motor as pump drive and a frequency inverter for the speed-regulated control of the motor, wherein the pump generates an acoustic information signal that is detectable by the external receiver; and varying at least one operating parameter of the frequency inverter while the pump is operating normally, in such a manner that the pump, while it is operating normally, delivers an acoustic information signal that is detectable by the external receiver. ### Claim 15 (depends on 14) The method as claimed in claim 14, wherein the at least one operating parameter is the motor voltage generated at the output of the frequency inverter. ### Claim 16 (depends on 15) The method as claimed in claim 15, wherein via the frequency inverter, a higher-frequency voltage is modulated onto the motor voltage that is generated, said higher-frequency voltage, when the pump is operating, generating an acoustic signal that is detectable by the receiver. ### Claim 17 (depends on 14) The method as claimed in claim 14, wherein the operating parameter that is varied is the switching frequency of the integrated inverter of the frequency inverter, so that an acoustic information signal that is detectable during normal operation of the pump is generated. ### Claim 18 (depends on 17) The method as claimed in claim 17, wherein the information content of the acoustic signal is determined by the deviation of the varied switching frequency of the frequency inverter from an original switching frequency. ### Claim 19 (depends on 17) The method as claimed in either claim 17, wherein specific information, including an indicator or a binary value, is outputted by a defined deviation of the switching frequency from the original reference switching frequency. ### Claim 20 (depends on 18) The method as claimed in either claim 18, wherein specific information, including an indicator or a binary value, is outputted by a defined deviation of the switching frequency from the original reference switching frequency. ### Claim 21 The method as claimed in 17, wherein the variation of the switching frequency takes place in a time-synchronized manner in order to allow a binary data sequence to be transmitted. ### Claim 22 The method as claimed in 18, wherein the variation of the switching frequency takes place in a time-synchronized manner in order to allow a binary data sequence to be transmitted. ### Claim 23 The method as claimed in 19, wherein the variation of the switching frequency takes place in a time-synchronized manner in order to allow a binary data sequence to be transmitted. ### Claim 24 (depends on 14) The method as claimed in claim 14, wherein the information contained in the acoustic information signal contains a state of the pump, including information on whether the pump is functioning properly. ### Claim 25 (depends on 14) The method as claimed in claim 14, wherein the information contained in the acoustic information signal indicates whether the pump has been registered. ### Claim 26 (depends on 14) The method as claimed in claim 14, wherein the external receiver records the operating noise of the pump via a microphone and extracts the transmitted information by audio signal analysis. ### Claim 27 (depends on 26) The method as claimed in claim 26, wherein the audio analysis comprises a fast Fourier transformation or a discrete Fourier transformation. ### Claim 28 (depends on 14) The method as claimed in claim 14, wherein the acoustic information signal is a signal that is perceptible to a human. ### Claim 29 (depends on 14) A centrifugal pump, comprising: an electric motor; and a frequency inverter for the speed-variable regulation of the electric motor, wherein the frequency inverter is configured to carry out the method as claimed in claim 14.