# US 11,077,857 B2 · Device and method for controlling alcohol interlock > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,857 B2 - Document ID: US11077857B2 - Status: Granted - Kind: B2 - Application number: 16/837,151 - Filed: 2020-04-01 - Published: 2021-06-10 - Granted: 2021-08-03 - Earliest claimed: 2019-12-10 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Dae Yun An; Gyun Ha Kim; Eung Hwan Kim; Sang Kyung Seo - Web page: https://patentgrep.com/patent/US11077857B2 ## CPC - B60K 28/063: {preventing starting of vehicles} - B60W 40/08: related to drivers or passengers - B60W 2040/0836: {due to alcohol} - B60W 2040/0881: {Seat occupation; Driver or passenger presence} - B60W 2540/01: Occupants other than the driver - B60W 2540/221: Physiology, e.g. weight, heartbeat, health or special needs - B60W 2540/24: Drug level, e.g. alcohol - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT ## Abstract A device for controlling alcohol interlock according to an embodiment of the present disclosure includes a sensor for obtaining position information and breath information of a fellow passenger, and a controller that determines whether a blood alcohol concentration of the fellow passenger is measured based on the position information and the breath information of the fellow passenger, and determines whether to re-measure a blood alcohol concentration based on the determination result. Thus, the device may prevent surrogate measurement of the fellow passenger, so that a driver's own blood alcohol concentration may be measured accurately, and drunk driving of a driver may be fundamentally prevented. ## Claims ### Claim 1 A device for controlling alcohol interlock, the device comprising: a sensor for obtaining position information and breath information of a fellow passenger; and a controller configured to: determine whether a blood alcohol concentration of the fellow passenger is measured based on the position information and the breath information of the fellow passenger; and determine whether to re-measure a blood alcohol concentration based on the determination result. ### Claim 2 (depends on 1) The device of claim 1, wherein the sensor obtains the position information of the fellow passenger based on sensing values output from a plurality of regions included in a sensible region. ### Claim 3 (depends on 2) The device of claim 2, wherein the sensor obtains the position information of the fellow passenger based on a chest movement of the fellow passenger and an occurrence region of a vibration of a body surface of the fellow passenger. ### Claim 4 (depends on 3) The device of claim 3, wherein the controller is configured to determine that the fellow passenger is sensed in a driver region when it is determined that the fellow passenger has left a fellow passenger region based on the sensing values output from the plurality of regions. ### Claim 5 (depends on 4) The device of claim 4, wherein the controller is configured to determine that the fellow passenger has invaded the driver region when it is determined that the fellow passenger is sensed in the driver region. ### Claim 6 (depends on 5) The device of claim 5, wherein the sensor obtains chest movement information of the fellow passenger, and obtains the breath information including a magnitude of breath and a period of the breath based on the chest movement information of the fellow passenger. ### Claim 7 (depends on 6) The device of claim 6, wherein the controller is configured to determine that the fellow passenger measured the blood alcohol concentration when the fellow passenger has invaded the driver region and both the magnitude of the breath and the period of the breath of the fellow passenger exceed a reference value. ### Claim 8 (depends on 7) The device of claim 7, wherein the reference value includes an average value of a magnitude of the breath and an average value of a period of the breath. ### Claim 9 A method for controlling alcohol interlock, the method comprising: obtaining position information and breath information of a fellow passenger; and determining whether a blood alcohol concentration of the fellow passenger is measured based on the position information and the breath information of the fellow passenger, and determining whether to re-measure a blood alcohol concentration based on the determination result. ### Claim 10 (depends on 9) The method of claim 9, wherein the obtaining of the position information of the fellow passenger includes: obtaining the position information of the fellow passenger based on sensing values output from a plurality of regions included in a sensible region. ### Claim 11 (depends on 10) The method of claim 10, wherein the obtaining of the position information of the fellow passenger includes: obtaining the position information of the fellow passenger based on a chest movement of the fellow passenger and an occurrence region of a vibration of a body surface of the fellow passenger. ### Claim 12 (depends on 11) The method of claim 11, wherein the determining of whether the blood alcohol concentration of the fellow passenger is measured includes: determining that the fellow passenger is sensed in a driver region when it is determined that the fellow passenger has left a fellow passenger region based on the sensing values output from the plurality of regions. ### Claim 13 (depends on 12) The method of claim 12, wherein the determining of whether the blood alcohol concentration of the fellow passenger is measured includes: determining that the fellow passenger has invaded the driver region when it is determined that the fellow passenger is sensed in the driver region. ### Claim 14 (depends on 13) The method of claim 13, wherein the obtaining of the breath information of the fellow passenger includes: obtaining chest movement information of the fellow passenger, and obtaining the breath information including a magnitude of breath and a period of the breath based on the chest movement information of the fellow passenger. ### Claim 15 (depends on 14) The method of claim 14, wherein the determining of whether the blood alcohol concentration of the fellow passenger is measured includes: determining that the fellow passenger measured the blood alcohol concentration when the fellow passenger has invaded the driver region and both the magnitude of the breath and the period of the breath of the fellow passenger exceed a reference value. ### Claim 16 (depends on 15) The method of claim 15, wherein the reference value includes an average value of a magnitude of the breath and an average value of a period of the breath.