# US 2022/0032872 A1 · Method for detecting the intention to lock or unlock a vehicle door and associated detecting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0032872 A1 - Document ID: US20220032872A1 - Status: Published application - Kind: A1 - Application number: 17/276,932 - Filed: 2019-09-18 - Published: 2022-02-03 - Earliest claimed: 2018-09-18 - Assignees: Vitesco Technologies GmbH - Applicants: Vitesco Technologies GmbH - Inventors: Gabriel SPICK; Vincent MARIMOUTOU; Steffen ECKHARDT - Web page: https://patentgrep.com/patent/US20220032872A1 ## CPC - B60R 25/20: Means to switch the anti-theft system on or off - H03K 17/97: using a magnetic movable element - B60R 25/01: operating on vehicle systems or fittings, e.g. on doors, seats or windscreens - B60R 25/30: Detection related to theft or to other events relevant to anti-theft systems - H03K 17/9525: {controlled by an oscillatory signal (H03K17/9537 takes precedence)} - H03K 2017/9706: {Inductive element} - H03K 2217/95: using a magnetic detector - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) ## Abstract Disclosed is a device for detecting intention to lock or unlock a door of a motor vehicle, the device including at least a first inductive sensor, including a first target, an oscillating circuit including a coil, a unit measuring a resonant frequency of the circuit, and a printed circuit. The device includes a second inductive sensor including: a second target in the form of a loop, such that a first end of the loop is connected to a fixed potential, and a second end of the loop is connected to a switch having two states, in a first state, the second end of the loop is connected to the fixed potential, in a second state, the second end of the loop is connected to a floating potential; and a controller for the switch. The coil of the first inductive sensor is common to the second inductive sensor. ## Claims ### Claim 1 A device (D) for detecting intention to lock or unlock a door of a motor vehicle, said device (D) comprising at least a first inductive sensor (A1), comprising a first target (20), an oscillating circuit (M1) comprising a coil (B), measuring means for measuring a resonant frequency of said circuit (M2), and a printed circuit (10), said device (D) further comprising a second inductive sensor (A2) comprising: a second target (30) in the form of a loop, such that a first end (E1) of the loop is connected to a fixed potential, and a second end (E2) of the loop is connected to switching means (S1) having two states: in a first state (P1), the second end (E2) of the loop is connected to said fixed potential, in a second state (P2), the second end (E2) of the loop is connected to a floating potential, control means (M3) for controlling the switching means (S1), the coil (B) of the first inductive sensor (A1) being common to the second inductive sensor (A2). ### Claim 2 (depends on 1) The detection device (D) as claimed in claim 1, wherein the first target (20) and the second target (30) are located on either side of the printed circuit (10) and wherein in that the coil (B) consists of a winding formed of turns (Ba, Bb) that are electrically connected to one another, each located on a layer (10a, 10b) of the printed circuit. ### Claim 3 (depends on 1) The detection device (D) as claimed in claim 1, wherein the fixed potential is electrical ground. ### Claim 4 A method for detecting intention to lock or unlock a motor vehicle door, performed by a detection device (D) comprising at least a first inductive sensor (A1), comprising a first target (20), an oscillating circuit (M1) comprising a coil (B), measuring means for measuring a resonant frequency of said circuit (M2), and a printed circuit (10), said method comprising: fitting the detection device (D) beforehand with a second inductive sensor (A2) comprising: a second target (30) in the form of a loop, such that a first end (E1) of the loop is connected to a fixed potential, and a second end (E2) of the loop is connected to switching means (S1) having two states: in a first state (P1), the second end (E2) of the loop is connected to said fixed potential, in a second state (P2), the second end (E2) of the loop is connected to a floating potential, control means (M3) for controlling the switching means (S1), the coil (B) of the first inductive sensor (A1) being common to the second inductive sensor (A2), positioning the switching means (S1) in the second state (P2) and performing a first measurement (N1) of an actual resonant frequency of the circuit (M1), positioning the switching means (S1) in the first state (P1) and performing a second measurement (N2) of an actual resonant frequency of the circuit (M1), calculating the measured difference (ΔN) between the second measurement (N2) and the first measurement (N1), comparing the first measurement (N1) with a first threshold (Th1), if the first measurement (N1) is greater than a first threshold (Th1), then comparing the measured difference (ΔN) with a second threshold (Th2), if the measured difference (ΔN) is greater than a second threshold (Th2), then detection is confirmed on the two inductive sensors (A1, A2), otherwise it is confirmed on the first inductive sensor (A1), otherwise, if the first measurement (N1) is less than the second threshold (Th1), then: comparing the measured difference (ΔN) with a second threshold (Th2), if the measured difference (ΔN) is greater than a second threshold (Th2), then detection is confirmed on the second inductive sensor (A2), otherwise no detection is confirmed. ### Claim 5 (depends on 4) The detection method as claimed in claim 4, wherein the fixed potential is electrical ground. ### Claim 6 (depends on 1) A motor vehicle door handle (P), comprising the detection device (D) as claimed in claim 1. ### Claim 7 (depends on 1) A motor vehicle (V), comprising the detection device (D) as claimed in claim 1. ### Claim 8 (depends on 2) The detection device (D) as claimed in claim 2, wherein the fixed potential is electrical ground. ### Claim 9 (depends on 2) A motor vehicle door handle (P), comprising a detection device (D) as claimed in claim 2. ### Claim 10 (depends on 3) A motor vehicle door handle (P), comprising a detection device (D) as claimed in claim 3. ### Claim 11 (depends on 8) A motor vehicle door handle (P), comprising a detection device (D) as claimed in claim 8. ### Claim 12 (depends on 2) A motor vehicle (V), comprising the detection device (D) as claimed in claim 2. ### Claim 13 (depends on 3) A motor vehicle (V), comprising the detection device (D) as claimed in claim 3. ### Claim 14 (depends on 8) A motor vehicle (V), comprising the detection device (D) as claimed in claim 8.