Vehicle unlocking method and device

Abstract

The application discloses a vehicle unlocking method and device, and relates to the technical field of vehicles.The method comprises the following steps: in response to an unlocking operation of a key holder, collecting biological impedance information of the key holder; generating a first unlocking signal according to the biological impedance information; the first unlocking signal represents the biological impedance characteristics of the key holder; generating a second unlocking signal based on a preset unlocking circuit; the second unlocking signal is an electrical signal sequence; fusing the first unlocking signal and the second unlocking signal to obtain a target unlocking signal, and determining signal identification information corresponding to the second unlocking signal; and sending the target unlocking signal and the signal identification information to the vehicle, so that the vehicle verifies the target unlocking signal and the signal identification information to control the unlocking of the vehicle.The application combines the biological impedance characteristics of the key holder and the unlocking circuit characteristics of the key itself to form a target unlocking signal that can represent the identity of the key holder, thereby effectively improving the security of vehicle unlocking.

Description

Technical Field

[0001] This application relates to the field of vehicle safety technology, specifically to vehicle unlocking methods and devices. Background Technology

[0002] Car unlocking devices typically consist of two parts: the wireless key on the user's side and the unlocking device on the car's side. When the wireless key performs an unlocking operation, it emits a weak radio wave signal. Upon receiving this signal, the car's unlocking device uses an electronic control unit to identify the corresponding code, and then the appropriate actuator controls the door to close.

[0003] However, wireless keys cannot identify the key holder's identity, meaning anyone with the key can unlock the car. In cases such as lost keys, the car's security will be severely compromised. Summary of the Invention

[0004] To improve the security of vehicle unlocking, this application provides a vehicle unlocking method and apparatus. The technical solution is as follows:

[0005] In a first aspect, this application provides a vehicle unlocking method applied to a key, the method comprising:

[0006] In response to the key holder's unlocking operation, the bioimpedance information of the key holder is collected;

[0007] A first unlocking signal is generated based on the bioimpedance information; the first unlocking signal characterizes the bioimpedance features of the key holder.

[0008] Based on a preset unlocking circuit, a second unlocking signal is generated, which is an electrical signal sequence.

[0009] The first unlock signal and the second unlock signal are fused to obtain the target unlock signal, and the signal identification information corresponding to the second unlock signal is determined.

[0010] The target unlock signal and the signal identification information are sent to the vehicle so that the vehicle can verify the target unlock signal and the signal identification information to control the unlocking of the vehicle.

[0011] Optionally, in response to the unlocking operation triggered by the key holder, the bioimpedance information of the key holder is collected, including:

[0012] In response to an unlocking operation triggered by the key holder, at least one bioimpedance signal sequence of the key holder is acquired based on a preset contact point;

[0013] The at least one bioimpedance signal sequence is used as the bioimpedance information;

[0014] The bioimpedance signal sequence is a time-domain sequence.

[0015] Optionally, generating the first unlocking signal based on the bioimpedance information includes:

[0016] Perform discrete Fourier transform on each of the at least one bioimpedance signal sequences to obtain at least one bioimpedance frequency domain signal sequence;

[0017] Calculate the mean of the at least one bioimpedance frequency domain signal sequence to obtain the bioimpedance characteristic sequence;

[0018] The bioimpedance feature sequence is used as the first unlocking signal.

[0019] Optionally, the method further includes:

[0020] The first unlock signal and the second unlock signal are fused to obtain the target unlock signal;

[0021] Based on a preset public key, the target unlock signal is encrypted to obtain a target encrypted unlock signal; and the signal identification information is encrypted to obtain signal identification encrypted information.

[0022] The target encryption / unlocking signal and the signal identification encryption information are sent to the vehicle.

[0023] Secondly, this application provides a vehicle unlocking method, applied to a vehicle, the method comprising:

[0024] Receive the target unlock signal and signal identification information sent by the key;

[0025] The vehicle acquires a second unlocking reference signal pre-stored in the system and determines the signal identification reference information corresponding to the second unlocking reference signal; the second unlocking reference signal is an electrical signal sequence.

[0026] If the signal identification reference information is consistent with the signal identification information, a first unlocking signal is determined from the target unlocking signal based on the second unlocking reference signal; the first unlocking signal characterizes the bioimpedance characteristics of the key holder.

[0027] Acquire a first unlock reference signal pre-stored in the vehicle, wherein the first unlock reference signal characterizes the bioimpedance characteristics of the vehicle owner;

[0028] When the first unlock signal matches the first unlock reference signal, the vehicle's locked state is released.

[0029] Optionally, the method further includes:

[0030] Receive the target encryption / unlocking signal and signal identifier encryption information sent by the key;

[0031] Based on the preset private key, the target encryption unlock signal and the signal identification encryption information are decrypted to obtain the target unlock signal and the signal identification information.

[0032] Optionally, the target unlock signal is obtained by fusing the first unlock signal and the second unlock signal based on a preset mapping function of the key, and determining the first unlock signal from the target unlock signal based on the second unlock reference signal includes:

[0033] If the signal identification reference information is consistent with the signal identification information, the first unlock signal and the second unlock signal are determined from the target unlock signal based on the preset inverse mapping function and the second unlock reference signal; the inverse mapping function corresponds to the mapping function.

[0034] The first unlocking signal characterizes the bioimpedance of the key holder, and the second unlocking signal is an electrical signal sequence generated by a preset unlocking circuit of the key.

[0035] Optionally, the method further includes:

[0036] Determine the correlation coefficient between the first unlock signal and the first unlock reference signal;

[0037] If the correlation coefficient is higher than a preset threshold, it is determined that the first unlocking signal matches the first unlocking reference signal.

[0038] Optionally, the method further includes:

[0039] If the signal identification reference information matches the signal identification information when the preset threshold is zero, the vehicle's locking status is released.

[0040] Thirdly, this application provides a vehicle unlocking device for use with a key, the device comprising:

[0041] The acquisition module is used to acquire the bioimpedance information of the key holder in response to the key holder's unlocking operation;

[0042] The first unlocking signal generation module is used to generate a first unlocking signal based on the bioimpedance information; the first unlocking signal characterizes the bioimpedance characteristics of the key holder.

[0043] The second unlock signal generation module is used to generate a second unlock signal based on a preset unlock circuit, wherein the second unlock signal is an electrical signal sequence;

[0044] The fusion module is used to fuse the first unlock signal and the second unlock signal to obtain the target unlock signal, and to determine the signal identification information corresponding to the second unlock signal;

[0045] The sending module is used to send the target unlock signal and the signal identification information to the vehicle, so that the vehicle can verify the target unlock signal and the signal identification information to control the unlocking of the vehicle.

[0046] Fourthly, this application provides a vehicle unlocking device, applied to a vehicle, the device comprising:

[0047] The receiving module is used to receive the target unlock signal and signal identification information sent by the key;

[0048] The first acquisition module is used to acquire the second unlocking reference signal pre-stored by the vehicle and determine the signal identification reference information corresponding to the second unlocking reference signal; the second unlocking reference signal is an electrical signal sequence.

[0049] The parsing module is configured to determine a first unlocking signal from the target unlocking signal based on the second unlocking reference signal, provided that the signal identification reference information matches the signal identification information; the first unlocking signal characterizes the bioimpedance characteristics of the key holder.

[0050] The second acquisition module is used to acquire a first unlocking reference signal pre-stored by the vehicle, wherein the first unlocking reference signal characterizes the bioimpedance characteristics of the vehicle owner.

[0051] The control module is used to release the vehicle from its locked state when the first unlock signal matches the first unlock reference signal.

[0052] The vehicle unlocking method and device provided in this application have the following technical effects:

[0053] The solution provided in this application, when unlocking a vehicle using a wireless key, collects the bioimpedance information of the key holder through the key, and then generates a first unlocking signal characterizing the bioimpedance characteristics of the key holder based on the bioimpedance information; simultaneously, it generates a second unlocking signal based on the key's preset unlocking circuit; the first and second unlocking signals are fused to obtain a target unlocking signal, which combines the key holder's identity characteristics and the key's circuit characteristics; finally, the key sends the signal identification information corresponding to the target unlocking signal and the second unlocking signal to the vehicle; after receiving the target unlocking signal and the signal identification information, the vehicle first determines the signal identification reference information corresponding to the pre-stored second unlocking reference signal; if the signal identification reference information matches the received signal identification information, the vehicle determines the first unlocking signal characterizing the key holder's bioimpedance characteristics from the received target unlocking information based on the second unlocking reference information; then it can determine whether the pre-stored first unlocking reference signal characterizing the vehicle owner's bioimpedance characteristics matches the parsed first unlocking signal; if they match, the key holder can be considered the vehicle owner, and the vehicle can be unlocked. The solution provided in this application incorporates a first unlock signal that can characterize the identity of the key holder into the unlock signal. This can verify the identity of the key holder, and the vehicle can only be unlocked if the key holder is the owner of the vehicle, thus further improving the security of vehicle unlocking. In addition, compared with traditional facial recognition and fingerprint recognition, using human body impedance information as a biometric for identity verification is faster, consumes less power, and has a simpler implementation structure on the key side.

[0054] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0055] To more clearly illustrate the technical solutions and advantages in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 This is a schematic diagram illustrating the implementation environment of a vehicle unlocking method provided in this application embodiment;

[0057] Figure 2 This is a schematic flowchart of a vehicle unlocking method provided in an embodiment of this application;

[0058] Figure 3This is a schematic diagram of an encryption process for a key end provided in an embodiment of this application;

[0059] Figure 4 This is a schematic diagram illustrating the signal fusion at the key end and the signal parsing at the vehicle end, provided in an embodiment of this application.

[0060] Figure 5 This is a schematic diagram of a process for determining whether to unlock a vehicle based on whether a first unlock signal matches a first unlock reference signal, according to an embodiment of this application.

[0061] Figure 6 This is a schematic diagram of the circuit structure of a key provided in an embodiment of this application;

[0062] Figure 7 This is a schematic diagram of a vehicle unlocking device provided in an embodiment of this application;

[0063] Figure 8 This is a schematic diagram of another vehicle unlocking device provided in an embodiment of this application. Detailed Implementation

[0064] To enhance vehicle unlocking security, this application provides a vehicle unlocking method and apparatus. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0065] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0066] To facilitate understanding of the technical solutions and their effects described in the embodiments of this application, the relevant technical terms are explained in the embodiments of this application:

[0067] Bioimpedance: Bioimpedance is a physical quantity that reflects the electrical properties of biological tissues, cells, organs, or the entire organism. Biotissue impedance technology is a non-invasive detection technique that utilizes the electrical properties and changes of biological tissues and organs to extract biomedical information related to tissue condition. Specifically, it involves applying a safe AC excitation signal to the subject by placing electrodes on the surface of the organism, measuring the response voltage signal, and detecting the corresponding impedance and its changes.

[0068] Discrete Fourier Transform (DFT): Fourier analysis is the most fundamental method of signal analysis. The Fourier transform is the core of Fourier analysis, which transforms signals from the time domain to the frequency domain, thereby studying the spectral structure and variation patterns of signals.

[0069] It is understood that in the specific embodiments of this application, data such as user biometric information are involved. When the above embodiments of this application are applied to specific products or technologies, user permission or consent is required, and the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0070] Please see Figure 1 This is a schematic diagram illustrating the implementation environment of the vehicle unlocking method provided in this application embodiment, such as... Figure 1 As shown, the implementation environment can include at least a key 01 on the user side and a vehicle 02. When the user performs an unlocking operation, the key 01 repeatedly collects the user's (i.e., the key holder's) bioimpedance information and generates a bioimpedance characteristic signal, i.e., the first unlocking signal, based on the bioimpedance information. At the same time, it generates a conventional unlocking signal, i.e., the second unlocking signal, based on the unlocking circuit built into the key 01. The key 01 can send the bioimpedance characteristic signal and the conventional unlocking signal to the vehicle 02. After receiving the bioimpedance characteristic signal and the conventional unlocking signal sent by the key 01, the signal receiving device of the vehicle 02 sends the signal to the MCU (Microcontroller Unit) in the ECU (Electronic Control Unit) for unlocking determination. If the bioimpedance characteristic signal matches the bioimpedance characteristic signal of the vehicle owner pre-stored in the vehicle 02 and the conventional unlocking signal is also verified, it indicates that the current key holder is the vehicle owner, and the vehicle can perform an unlocking operation.

[0071] Specifically, key 01 fuses the bioimpedance characteristic signal and the traditional unlocking signal and sends them to vehicle 02, along with the signal identification information corresponding to the traditional unlocking signal. During the verification process of vehicle 02, it can check whether the signal identification reference information corresponding to the second unlocking reference signal pre-stored by the vehicle matches the received signal identification information. If they match, it can be assumed that the traditional unlocking signal matches the pre-stored second unlocking reference signal. Under this premise, it further verifies whether the received bioimpedance characteristic signal matches the bioimpedance characteristic signal of the vehicle owner pre-stored by vehicle 02. If they match, the user's identity is verified as the vehicle owner, and the vehicle can be unlocked. If both verifications fail, the user's identity verification fails, and the vehicle remains locked. Figure 1 The vehicle unlocking method shown can identify whether the key holder is the vehicle owner, improving the accuracy and reliability of identity verification, thereby enhancing the security and reliability of vehicle unlocking.

[0072] The following describes a vehicle unlocking method provided in this application. Figure 2 This is a flowchart illustrating a vehicle unlocking method provided in an embodiment of this application. This application provides the operational steps of the method described in the embodiments or flowchart, but based on conventional or non-inventive methods, more or fewer operational steps may be included. The order of steps listed in the embodiments is merely one possible execution order among many and does not represent the only possible execution order. In actual system or server product execution, the methods can be executed sequentially according to the embodiments or drawings, or in parallel (e.g., in a parallel processor or multi-threaded processing environment). Please refer to... Figure 2 The vehicle unlocking method provided in this application embodiment may include the following steps:

[0073] In step S110, in response to the key holder's unlocking operation, the key holder's bioimpedance information is collected.

[0074] In this embodiment, to address the vehicle security problem caused by the inability to identify the true identity of the key holder when unlocking a vehicle using a traditional wireless key, a vehicle unlocking method is proposed that can identify whether the key holder is the vehicle owner. It should be noted that in this embodiment, the vehicle owner can be understood as a user with vehicle unlocking authority, and the biometric characteristics of such users can be pre-stored in the vehicle's infotainment system.

[0075] In this embodiment, in response to the key holder's unlocking operation, the bioimpedance information of the key holder is collected. The unlocking operation can be pressing the unlock button on the wireless key, or simply holding the key; this embodiment does not limit the specific action. Upon sensing the key holder's intent to unlock, the bioimpedance information of the key holder is collected. This bioimpedance information includes the key holder's bioelectrical impedance and its changes, used to verify the key holder's identity. Bioelectrical impedance is a complex coupling of resistance and capacitance of varying magnitudes, reflecting the bioelectrical characteristics of the key holder's body and possessing human-specific characteristics; that is, bioimpedance can uniquely identify a user.

[0076] In one embodiment of this application, step S110 may specifically include the following steps:

[0077] S111: In response to an unlocking operation triggered by the key holder, at least one bioimpedance signal sequence of the key holder is acquired based on a preset contact point.

[0078] Specifically, a safe AC excitation signal is applied to the key holder by placing a preset contact on the key surface, and the corresponding voltage signal is measured to calculate the key holder's bioelectrical impedance and its changes.

[0079] One bioimpedance signal sequence represents the bioelectrical impedance of the key holder and its changes within a single acquisition period. It is understood that human bioimpedance is related to the electrical characteristics of the biological organism, and the electrical characteristics of the same person at different times can vary. Therefore, to obtain stable bioimpedance characteristics, it is preferable to perform multiple acquisitions to obtain multiple bioimpedance signal sequences.

[0080] S112: Use at least one bioimpedance signal sequence as bioimpedance information; the bioimpedance signal sequence is a time-domain sequence.

[0081] For example, the bioimpedance signal sequence A measured in the i-th time i It can be represented as:

[0082] A i =[a i1 ,a i2 ,...,a im ]

[0083] Among them, a i1 a i2 ......a im Let be the bioelectrical impedance value of the key holder at m time points within the i-th acquisition cycle.

[0084] Bioimpedance information can contain multiple bioimpedance signal sequences, which can be represented as:

[0085] A = [A1, A2, ..., A n ]

[0086] Where A1, A2, ..., A n Each sequence in the dataset can contain bioelectrical impedance values ​​corresponding to m time points.

[0087] In the above embodiments, by acquiring multiple bioimpedance signal sequences through multiple acquisitions, the impact of data errors in a single acquisition can be reduced, thereby improving the reliability of subsequent identity verification.

[0088] In step S120, a first unlocking signal is generated based on bioimpedance information; the first unlocking signal characterizes the bioimpedance features of the key holder.

[0089] In this embodiment, the collected bioimpedance information is the bioelectrical impedance value of the key holder within the collection time interval, which has certain unique characteristics. If the bioimpedance information is directly used for identity verification, misjudgments are likely to occur, resulting in the inability to unlock the vehicle and affecting the user experience. Therefore, it is necessary to process the bioimpedance information to obtain a first unlocking signal that can characterize stable bioimpedance features. Optional operations may include, but are not limited to, removing abnormal values ​​from the bioimpedance signal sequence, removing bioimpedance signal sequences corresponding to interrupted collection processes, and averaging multiple bioimpedance signal sequences.

[0090] In one embodiment of this application, step S120 may specifically include the following steps:

[0091] S121: Perform discrete Fourier transform on at least one bioimpedance signal sequence to obtain at least one bioimpedance frequency domain signal sequence.

[0092] On the one hand, transforming the bioimpedance signal sequence in the time domain to the frequency domain allows us to study the spectral structure and variation patterns of the bioimpedance signal sequence. On the other hand, in order to meet the requirements of wireless signal transmission, it is also necessary to transform the time domain signal to the frequency domain.

[0093] S122: Calculate the mean of at least one bioimpedance frequency domain signal sequence to obtain a bioimpedance characteristic sequence.

[0094] S123: Use the bioimpedance characteristic sequence as the first unlocking signal.

[0095] Understandably, in the above embodiments, the average value of multiple bioimpedance signal sequences after transformation to the frequency domain can more stably and reliably characterize the bioimpedance characteristics of the key holder compared to the original bioimpedance information.

[0096] For example, according to the foregoing embodiments, the bioimpedance signal sequence A measured for the i-th time in the bioimpedance information i Its corresponding bioimpedance frequency domain signal sequence H(A) i This can be represented as:

[0097]

[0098] Bioimpedance information A=[A1,A2,...,A n The mean of the corresponding bioimpedance frequency domain signal sequence (i.e., the first unlock signal) can be expressed as:

[0099]

[0100] In step S130, a second unlocking signal is generated based on a preset unlocking circuit. The second unlocking signal is an electrical signal sequence.

[0101] In this embodiment, the original unlocking method of the wireless key is still retained, that is, the radio wave signal is generated by the preset unlocking circuit as the second unlocking signal, so that the vehicle can identify the code corresponding to the signal when it receives the second unlocking signal, which is equivalent to verifying whether the key itself corresponds to the vehicle.

[0102] For example, the time-domain electrical signal sequence B generated by the preset unlocking circuit can be represented as:

[0103] B = [b1, b2, ..., b s ]

[0104] Furthermore, the time-domain electrical signal sequence can be transformed into a frequency-domain electrical signal sequence H(B), which can be expressed as:

[0105]

[0106] This explanation uses only an electrical signal with one signal generation cycle as an example.

[0107] In step S140, the first unlock signal and the second unlock signal are fused to obtain the target unlock signal, and the signal identification information corresponding to the second unlock signal is determined.

[0108] In this embodiment, the target unlock signal obtained by fusing the first unlock signal and the second unlock signal combines bioimpedance characteristics that can characterize the identity of the key holder and the mechanical characteristics of the key. Compared with verification using only the mechanical characteristics of the key, this embodiment also verifies the identity of the key holder's bioimpedance characteristics, which helps to improve the security of vehicle unlocking.

[0109] In this embodiment of the application, the fusion of the first unlock signal and the second unlock signal can be achieved by superimposing the spectrum in the frequency domain, such as by interleaving the frequency values ​​of the two signals sequentially, or by mapping the frequency values ​​of the first unlock signal and the second unlock signal, such as by performing operations based on a mapping function or by data conversion based on a preset mapping table.

[0110] In this embodiment of the application, the signal identification information corresponding to the second unlocking signal is used to characterize the identity of the key. This model identification information may be the hash value corresponding to the second unlocking signal, etc.

[0111] In one embodiment of this application, such as Figure 3 As shown, adding an encryption process can improve the security of signal and information transmission. Specifically, step S140 may include the following steps:

[0112] S141: The first unlock signal and the second unlock signal are fused to obtain the target unlock signal.

[0113] S142: Based on the preset public key, encrypt the target unlock signal to obtain the target encrypted unlock signal; and encrypt the signal identification information to obtain the signal identification encrypted information.

[0114] S143: Send the target encryption / unlock signal and the signal identification encryption information to the vehicle.

[0115] For example, based on the foregoing embodiments, the first unlock signal can be represented as The second unlock signal can be represented as H(B). Based on a preset mapping function M(x,y), the first and second unlock signals are fused into the target unlock signal. Then, M is accessed via the vehicle's pre-installed public key. Encryption is performed to obtain the target encryption and unlocking signal. Asymmetric encryption is used here, that is, the public key is used to encrypt at the key end and the private key is used to decrypt at the vehicle depot; at the same time, the hash value of H(B) is also encrypted to obtain the encrypted hash value, which is the signal identifier encrypted information.

[0116] In another feasible embodiment, only the target unlock signal can be encrypted; this is only an example and will not be elaborated further.

[0117] In step S150, the target unlock signal and signal identification information are sent to the vehicle.

[0118] In this embodiment, the key is the executing entity for steps S110 to S150. The vehicle is the executing entity for steps S210 to S250. In this embodiment, a target unlock signal and signal identification information are sent to the vehicle so that the vehicle can verify the target unlock signal and signal identification information to control the unlocking of the vehicle. In addition, the key can also send an unlock command to trigger the signal verification step in the unlocking process, that is, to trigger the vehicle to execute steps S210 to S250.

[0119] In step S210, the vehicle receives the target unlock signal and signal identification information sent by the key.

[0120] In step S220, the second unlocking reference signal pre-stored by the vehicle is acquired, and the signal identification reference information corresponding to the second unlocking reference signal is determined; the second unlocking reference signal is an electrical signal sequence.

[0121] In this embodiment, the second unlocking reference signal is a sequence of electrical signals pre-stored in the vehicle and generated by the key itself, which matches the vehicle. Due to the invariance of the key's mechanical structure, the generated electrical signal sequence remains unchanged. Signal identification reference information can replace the second unlocking reference signal to characterize the key's identity. That is, the correctness of the sent second unlocking signal can be verified by checking whether the signal identification information matches the signal identification reference information. Alternatively, it can be understood as verifying whether the key sending the target unlocking signal and signal identification information is a key matched to the vehicle.

[0122] In one feasible embodiment, the signal identification information sent by the key is the hash value of the second unlocking signal. Then, on the vehicle side, the vehicle obtains the hash value corresponding to the second unlocking reference signal according to the same hash function, and uses it as the signal identification reference information.

[0123] In step S230, if the signal identification reference information is consistent with the signal identification information, the first unlocking signal is determined from the target unlocking signal based on the second unlocking reference signal; the first unlocking signal characterizes the bioimpedance characteristics of the key holder.

[0124] In this embodiment of the application, the signal identification reference information is consistent with the signal identification information. That is, it can be considered that the second unlocking signal sent by the key is consistent with the second unlocking reference signal pre-stored by the vehicle, and it can also be considered that the key that sends the target unlocking signal and the signal identification information is a key that matches the vehicle.

[0125] Understandably, the key side obtains the target unlock signal by fusing the first and second unlock signals. To verify the key holder's identity using biometric impedance characteristics, the vehicle side needs to perform a reverse fusion operation to obtain the first unlock signal. If the signal identification information verification is successful, the second unlock reference signal can be directly used as the second unlock signal, facilitating the analysis of the target unlock signal and thus obtaining the first unlock signal.

[0126] It is feasible to determine the first unlock signal by performing a reverse operation based on a fusion approach. For example, such as... Figure 4 As shown, signal fusion at the key end and signal parsing at the vehicle end may include the following steps:

[0127] S410: Based on a preset mapping function, the first unlock signal and the second unlock signal are fused to obtain the target unlock signal.

[0128] S420: Determine the signal identification information corresponding to the second unlock signal.

[0129] S430: Send the target unlock signal and the signal identification information to the vehicle.

[0130] S440: Receives the target unlock signal and signal identification information sent by the key.

[0131] S450: Obtain the second unlocking reference signal pre-stored by the vehicle and determine the signal identification reference information corresponding to the second unlocking reference signal; the second unlocking reference signal is an electrical signal sequence.

[0132] Steps S410 to S450 can be referred to the above embodiments, and will not be repeated here.

[0133] S460: When the signal identification reference information is consistent with the signal identification information, the first unlocking signal is determined from the target unlocking signal based on the preset inverse mapping function and the second unlocking reference signal; the inverse mapping function corresponds to the mapping function.

[0134] Referring to the foregoing embodiments, the key fuses the first unlock signal and the second unlock signal into a target unlock signal based on a preset mapping function M(x,y). If the signal identification information verification is successful, the second unlocking reference signal can be directly used as the second unlocking signal. Then, the vehicle side utilizes the corresponding inverse mapping function M. -1 (x, y) and the second unlocking reference signal pair The first unlock signal was obtained through analysis.

[0135] In step S240, a first unlocking reference signal pre-stored in the vehicle is acquired, the first unlocking reference signal representing the bioimpedance characteristics of the vehicle owner.

[0136] It should be noted that, in this embodiment of the application, the vehicle owner can be understood as a user with vehicle unlocking authority. The bioimpedance characteristics of such users can be collected, generated and stored in the vehicle system in advance through the key contacts.

[0137] In step S250, the vehicle is unlocked when the first unlock signal matches the first unlock reference signal.

[0138] In this embodiment, considering that even for the same person, the bioimpedance characteristics measured multiple times may differ, determining whether the key holder is the vehicle owner by verifying whether the first unlock signal and the first unlock reference signal are completely identical is potentially prone to misjudgment. Therefore, in this embodiment, determining whether the key holder is the vehicle owner is done by verifying whether the first unlock signal and the first unlock reference signal are relatively matched.

[0139] It is feasible to determine whether the first unlock signal and the first unlock reference signal match by calculating the correlation coefficient between them. Specifically, for example... Figure 5 As shown, step S250 may include:

[0140] S251: Determine the correlation coefficient between the first unlock signal and the first unlock reference signal.

[0141] The correlation coefficient characterizes the similarity between the first unlocking signal and the first unlocking reference signal, that is, it characterizes the matching degree between the first unlocking signal and the first unlocking reference signal. This correlation coefficient can be calculated based on the covariance and variance of the values ​​in the two signal sequences, the Euclidean distance between the two signal sequences, etc.

[0142] For example, the correlation coefficient between the first unlock signal X and the first unlock reference signal Y can be calculated using formula (1):

[0143]

[0144] Where Cov(X,Y) is the covariance of X and Y, Var(X) is the variance of X, and Var(Y) is the variance of Y.

[0145] S252: If the correlation coefficient is higher than a preset threshold, determine that the first unlock signal matches the first unlock reference signal.

[0146] In this embodiment, if the correlation coefficient is higher than a preset threshold, it can be determined that the bioimpedance feature match is successful, and the key holder is also the vehicle owner. The vehicle's ECU can be used to unlock the vehicle, allowing the key holder to use it smoothly. Figure 5 As shown, if the correlation coefficient is not higher than the preset threshold, it can be determined that the bio-impedance feature matching has failed, the current key holder is not the vehicle owner and is therefore untrustworthy, and the vehicle needs to be locked to ensure the vehicle's security.

[0147] Furthermore, in one feasible implementation, such as Figure 5 As shown, when the preset threshold is zero, if the signal identifier reference information matches the signal identifier information, the vehicle's lock is directly released. That is, when the threshold is set to zero, the entire system degenerates into a regular encryption unlocking device to prevent situations where unlocking is impossible due to abnormalities in the vehicle owner's biometric characteristics. The preset threshold can be adjusted by the vehicle owner.

[0148] In one feasible implementation, the key encrypts the sent target unlock signal and signal identifier. Accordingly, the encrypted signal and information must first be decrypted at the vehicle end before subsequent verification. Specifically, the method may further include:

[0149] S310: Receives the target encryption unlock signal and signal identification encryption information sent by the key.

[0150] S320: Based on the preset private key, decrypt the target encryption / unlock signal and the signal identifier encryption information to obtain the target unlock signal and signal identifier information.

[0151] Taking asymmetric encryption as an example, a public key is used for encryption on the key side, and the corresponding private key is used for decryption on the vehicle side, which improves the security of signal and information transmission.

[0152] In another feasible embodiment, only the target unlock signal is encrypted and decrypted; this is only an example and will not be described in detail here.

[0153] Figure 6 The circuit structure of a specific key is shown. For example... Figure 6 As shown, the internal structure of a wireless key can include a damping acquisition circuit, a conventional unlocking command generation circuit, a fusion circuit, and a radio frequency signal transmission circuit. Specifically, the impedance acquisition circuit collects human body impedance signals multiple times when the user takes out the key to unlock, thereby generating a stable human body impedance characteristic signal; the conventional unlocking command generation circuit generates a conventional unlocking command signal; the fusion circuit fuses the human body impedance characteristic signal and the conventional unlocking command signal; and the radio frequency signal transmission circuit sends the fused signal to the vehicle.

[0154] As can be seen from the technical solution provided in the above embodiments of this application, when unlocking a vehicle using a wireless key, the bioimpedance information of the key holder is collected by the key, and a first unlocking signal characterizing the bioimpedance characteristics of the key holder is generated based on the bioimpedance information; simultaneously, a second unlocking signal is generated based on the unlocking circuit preset by the key itself; the first unlocking signal and the second unlocking signal are fused together to obtain a target unlocking signal, which combines the identity characteristics of the key holder and the circuit characteristics of the key; finally, the key sends the signal identification information corresponding to the target unlocking signal and the second unlocking signal to the vehicle; after receiving the target unlocking signal and the signal identification information, the vehicle first determines the signal identification reference information corresponding to the pre-stored second unlocking reference signal; if the signal identification reference information is consistent with the received signal identification information, the first unlocking signal characterizing the bioimpedance characteristics of the key holder is determined from the received target unlocking information based on the second unlocking reference information; then it can be determined whether the pre-stored first unlocking reference signal characterizing the bioimpedance characteristics of the vehicle owner matches the parsed first unlocking signal. If they match, the key holder can be considered the vehicle owner, and the vehicle can be unlocked. The solution provided in this application incorporates a first unlock signal that can characterize the identity of the key holder into the unlock signal. This can verify the identity of the key holder, and the vehicle can only be unlocked if the key holder is the owner of the vehicle, thus further improving the security of vehicle unlocking. In addition, compared with traditional facial recognition and fingerprint recognition, using human body impedance information as a biometric for identity verification is faster, consumes less power, and has a simpler implementation structure on the key side.

[0155] This application also provides a vehicle unlocking device 700, applied to a key, such as... Figure 7 As shown, the device 700 may include:

[0156] The acquisition module 710 is used to acquire the bioimpedance information of the key holder in response to the key holder's unlocking operation;

[0157] The first unlocking signal generation module 720 is used to generate a first unlocking signal based on the bioimpedance information; the first unlocking signal characterizes the bioimpedance characteristics of the key holder.

[0158] The second unlock signal generation module 730 is used to generate a second unlock signal based on a preset unlock circuit, wherein the second unlock signal is an electrical signal sequence;

[0159] The fusion module 740 is used to fuse the first unlock signal and the second unlock signal to obtain a target unlock signal, and to determine the signal identification information corresponding to the second unlock signal;

[0160] The sending module 750 is used to send the target unlock signal and the signal identification information to the vehicle, so that the vehicle can verify the target unlock signal and the signal identification information to control the unlocking of the vehicle.

[0161] In one embodiment of this application, the acquisition module 710 may include:

[0162] A contact acquisition unit is used to acquire at least one bioimpedance signal sequence of the key holder based on a preset contact in response to an unlocking operation triggered by the key holder.

[0163] A sequence set unit is used to use the at least one bioimpedance signal sequence as the bioimpedance information; the bioimpedance signal sequence is a time-domain sequence.

[0164] In one embodiment of this application, the first unlock signal generation module 720 may include:

[0165] The Fourier transform unit is used to perform discrete Fourier transform on the at least one bioimpedance signal sequence to obtain at least one bioimpedance frequency domain signal sequence.

[0166] The mean calculation unit is used to calculate the mean of the at least one bioimpedance frequency domain signal sequence to obtain a bioimpedance characteristic sequence.

[0167] And the bioimpedance feature sequence is used as the first unlocking signal.

[0168] In one embodiment of this application, the device 700 may further include:

[0169] The fusion unit fuses the first unlock signal and the second unlock signal to obtain the target unlock signal;

[0170] An encryption unit is used to encrypt the target unlock signal based on a preset public key to obtain a target encrypted unlock signal; and to encrypt the signal identification information to obtain signal identification encrypted information;

[0171] The transmitting unit is used to send the target encryption / unlocking signal and the signal identification encryption information to the vehicle.

[0172] This application also provides a vehicle unlocking device 800, applied to a vehicle, such as... Figure 8 As shown, the device 800 may include:

[0173] The receiving module 810 is used to receive the target unlock signal and signal identification information sent by the key;

[0174] The first acquisition module 820 is used to acquire the second unlocking reference signal pre-stored by the vehicle and determine the signal identification reference information corresponding to the second unlocking reference signal; the second unlocking reference signal is an electrical signal sequence.

[0175] The parsing module 830 is configured to determine a first unlocking signal from the target unlocking signal based on the second unlocking reference signal when the signal identification reference information is consistent with the signal identification information; the first unlocking signal characterizes the bioimpedance characteristics of the key holder.

[0176] The second acquisition module 840 is used to acquire a first unlocking reference signal pre-stored in the vehicle, wherein the first unlocking reference signal characterizes the bioimpedance characteristics of the vehicle owner.

[0177] The control module 850 is used to release the vehicle from its locked state when the first unlock signal matches the first unlock reference signal.

[0178] In one embodiment of this application, the device 800 may further include:

[0179] The receiving unit is used to receive the target encryption unlock signal and signal identification encryption information sent by the key;

[0180] The decryption unit is used to decrypt the target encryption unlock signal and the signal identifier encryption information based on a preset private key, so as to obtain the target unlock signal and the signal identifier information.

[0181] In one embodiment of this application, the target unlock signal is obtained by fusing the first unlock signal and the second unlock signal based on a preset mapping function of the key, and the parsing module 830 may include:

[0182] An inverse mapping unit is used to determine the first unlock signal and the second unlock signal from the target unlock signal based on a preset inverse mapping function and the second unlock reference signal, when the signal identification reference information is consistent with the signal identification information; the inverse mapping function corresponds to the mapping function;

[0183] The first unlocking signal characterizes the bioimpedance of the key holder, and the second unlocking signal is an electrical signal sequence generated by a preset unlocking circuit of the key.

[0184] In one embodiment of this application, the device 800 may further include a matching module, which may include:

[0185] A correlation coefficient determination unit is used to determine the correlation coefficient between the first unlocking signal and the first unlocking reference signal;

[0186] The comparison unit is used to determine that the first unlocking signal matches the first unlocking reference signal when the correlation coefficient is higher than a preset threshold.

[0187] In one embodiment of this application, the device 800 may further include:

[0188] An anomaly handling unit is configured to release the vehicle's locking state if the signal identification reference information matches the signal identification information when the preset threshold is zero.

[0189] It should be noted that the apparatus provided in the above embodiments is only illustrated by the division of the above functional modules when implementing its functions. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus and method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process can be found in the method embodiments, which will not be repeated here.

[0190] This application also provides a computer device, which includes a processor and a memory. The memory stores at least one instruction or at least one program, which is loaded and executed by the processor to implement a vehicle unlocking method as provided in the above method embodiments.

[0191] This application also provides a computer-readable storage medium, which can be disposed in a server to store at least one instruction or at least one program related to implementing a vehicle unlocking method in the method embodiment. The at least one instruction or at least one program is loaded and executed by the processor to implement a vehicle unlocking method provided in the above method embodiment.

[0192] Optionally, in this embodiment, the storage medium may be located at at least one of the multiple network servers in a computer network. Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0193] This invention also provides a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform a vehicle unlocking method provided in the various optional embodiments described above.

[0194] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, the above description focuses on specific embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in a different order than that shown in the embodiments and still achieve the desired results. Additionally, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired results. In some implementations, multitasking and parallel processing are also possible or may be advantageous.

[0195] The various embodiments in this application are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device, equipment, and storage medium embodiments are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0196] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0197] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vehicle unlocking method characterized by, The method applied to a key comprises: In response to an unlocking operation triggered by a key holder, biological impedance information of the key holder is collected; According to the biological impedance information, a first unlocking signal is generated; the first unlocking signal represents the biological impedance characteristics of the key holder; Based on a preset unlocking circuit, a second unlocking signal is generated; the second unlocking signal is a sequence of electrical signals; The first unlocking signal and the second unlocking signal are fused to obtain a target unlocking signal, and signal identification information corresponding to the second unlocking signal is determined; The target unlocking signal and the signal identification information are sent to a vehicle, so that the vehicle verifies the target unlocking signal and the signal identification information to control the unlocking of the vehicle.

2. The method of claim 1, wherein, In response to the unlocking operation triggered by the key holder, the biological impedance information of the key holder is collected, which comprises: In response to the unlocking operation triggered by the key holder, at least one biological impedance signal sequence of the key holder is collected based on a preset contact point; The at least one biological impedance signal sequence is taken as the biological impedance information; The biological impedance signal sequence is a time domain sequence.

3. The method of claim 2, wherein, The first unlocking signal is generated according to the biological impedance information, which comprises: The at least one biological impedance signal sequence is respectively subjected to discrete Fourier transform to obtain at least one biological impedance frequency domain signal sequence; The mean value of the at least one biological impedance frequency domain signal sequence is calculated to obtain a biological impedance characteristic sequence; The biological impedance characteristic sequence is taken as the first unlocking signal.

4. The method of claim 1, wherein, The method further comprises: The first unlocking signal and the second unlocking signal are fused to obtain a target unlocking signal; Based on a preset public key, the target unlocking signal is encrypted to obtain a target encrypted unlocking signal, and the signal identification information is encrypted to obtain signal identification encryption information; The target encrypted unlocking signal and the signal identification encryption information are sent to the vehicle.

5. A vehicle unlocking method characterized by, The method applied to a vehicle comprises: A target unlocking signal and signal identification information sent by a key are received; A second unlocking reference signal pre-stored in the vehicle is obtained, and signal identification reference information corresponding to the second unlocking reference signal is determined; the second unlocking reference signal is a sequence of electrical signals; In the case that the signal identification reference information is consistent with the signal identification information, a first unlocking signal is determined from the target unlocking signal based on the second unlocking reference signal; the first unlocking signal represents the biological impedance characteristics of the key holder; A first unlocking reference signal pre-stored in the vehicle is obtained; the first unlocking reference signal represents the biological impedance characteristics of the vehicle owner; In the case that the first unlocking signal matches the first unlocking reference signal, the locking state of the vehicle is released.

6. The method of claim 5, wherein, The method further comprises: A target encrypted unlocking signal and signal identification encryption information sent by a key are received; Based on a preset private key, the target encrypted unlocking signal and the signal identification encryption information are decrypted to obtain the target unlocking signal and the signal identification information.

7. The method of claim 5, wherein, The target unlocking signal is obtained by fusing the first unlocking signal and the second unlocking signal based on a preset mapping function, and the first unlocking signal is determined from the target unlocking signal based on the second unlocking reference signal, comprising: In the case that the signal identification reference information is consistent with the signal identification information, the first unlocking signal and the second unlocking signal are determined from the target unlocking signal based on a preset mapping inverse function and the second unlocking reference signal; the mapping inverse function corresponds to the mapping function; The first unlocking signal represents the biological impedance characteristics of the key holder, and the second unlocking signal is an electrical signal sequence generated by a preset unlocking circuit of the key.

8. The method of claim 5, wherein, The method further comprises: determining the correlation coefficient of the first unlocking signal and the first unlocking reference signal; In the case that the correlation coefficient is higher than a preset threshold, it is determined that the first unlocking signal matches the first unlocking reference signal.

9. The method of claim 8, wherein, The method further comprises: In the case that the preset threshold is zero, if the signal identification reference information is consistent with the signal identification information, the locking state of the vehicle is released.

10. A vehicle unlocking device characterized by comprising: Applied to a key, the device comprises: a collection module for collecting biological impedance information of the key holder in response to an unlocking operation of the key holder; a first unlocking signal generation module for generating a first unlocking signal based on the biological impedance information; the first unlocking signal represents the biological impedance characteristics of the key holder; a second unlocking signal generation module for generating a second unlocking signal based on a preset unlocking circuit; the second unlocking signal is an electrical signal sequence; a fusion module for fusing the first unlocking signal and the second unlocking signal to obtain a target unlocking signal, and determining signal identification information corresponding to the second unlocking signal; a sending module for sending the target unlocking signal and the signal identification information to a vehicle, so that the vehicle verifies the target unlocking signal and the signal identification information to control the unlocking of the vehicle.

11. A vehicle unlocking device characterized by comprising: Applied to a vehicle, the device comprises: a receiving module for receiving a target unlocking signal and signal identification information sent by a key; a first acquisition module for acquiring a second unlocking reference signal stored in advance by the vehicle, and determining signal identification reference information corresponding to the second unlocking reference signal; the second unlocking reference signal is an electrical signal sequence; an analysis module for determining a first unlocking signal from the target unlocking signal based on the second unlocking reference signal in the case that the signal identification reference information is consistent with the signal identification information; the first unlocking signal represents the biological impedance characteristics of the key holder; a second acquisition module for acquiring a first unlocking reference signal stored in advance by the vehicle; the first unlocking reference signal represents the biological impedance characteristics of the vehicle owner; a control module for releasing the locking state of the vehicle in the case that the first unlocking signal matches the first unlocking reference signal.

Images