Writing pen, signature recognition method and system

Abstract

The present application discloses a writing pen, a signature recognition method and a system thereof. A motion sensing device is configured at the non-writing end of the writing pen. When the writing pen writes on a plane writing trajectory generating device, the motion trajectory of the non-writing end is recorded. When the motion trajectory and / or the plane writing trajectory are compared, it is determined that the signature is from a specific person.

Description

Technical Field

[0001] The present application relates to an innovative method and system for authentication based on biometric technology, and more particularly to a writing pen and a signature recognition method and system for recognizing a signature written by the writing pen. Background Art

[0002] Signature is a method of identity verification with a long history. After the rise of electronic transactions, businesses have also tried to use electronic devices and mobile devices for signature verification. However, the types and number of features that can be provided by signing on the touch panels of electronic devices and mobile devices are too small to perform correct identity verification. If electronic signatures are to provide a sufficient number of features, multiple features must be detected at the same time and a large amount of data must be obtained. Authentication in this way does not meet the needs of commercial applications.

[0003] In order to solve the technological problems that electronic signatures cannot solve, the industry has developed "air signatures". Usually, the signer makes certain movements in the air with his body, which are captured by computer vision, and features are extracted for identity verification. This technology is mainly based on the fact that human limbs have multiple joints, and the same movement performed by different people will have different results.

[0004] However, the existing technologies all generate motion trajectories by body movements and then identify the trajectories. Therefore, the user needs a larger operating space when executing, which is not convenient. Summary of the invention

[0005] The purpose of this application is to provide a novel signature comparison technology for performing identity authentication.

[0006] The purpose of this application is also to provide a novel writing pen for performing signature comparison.

[0007] According to one of the purposes of the present application, a novel writing pen is provided. The writing pen includes a body, an inducer of a writing trajectory, and an air signature generator. The body includes a writing end and a motion sensing end, which are separated by an angle of at least 90 degrees. The inducer is arranged at the writing end, and is used to generate a writing trajectory on a sensing surface. The air signature generator is arranged at the motion sensing end, and includes a motion sensing device, a first communication device, a control device, and a power supply. The motion sensing device is used to sense the three-dimensional spatial movement of the motion sensing end, and outputs the reading value of at least one dimension of the three-dimensional spatial movement at intervals and continuously at a predetermined time. The first communication device is used to establish a communication channel with an external device in a wireless or wired manner. The control device connects the motion sensing device and the first communication device to receive the sensing result information of the motion sensing device, process the sensing result information, and transmit it to the external device via the first communication device. The control device is further configured to: record the current time as the first time after receiving the start detection instruction, obtain the reading of the motion sensing device, and record the current time as the second time after receiving the stop sensing instruction, so as to generate an air signature file containing the first time, the reading of the motion sensing device and the second time, and activate the first communication device to transmit the air signature file to the external device. The power supply is connected to the motion sensing device, the first communication device and the control device to provide power to the motion sensing device, the first communication device and the control device.

[0008] The present application also provides an innovative signature recognition method and signature recognition system. The signature recognition system of the present application includes at least one writing pen having the above-mentioned characteristics and a signature recognition device. The signature recognition device includes: a signature data storage device, a second communication device and a signature comparison device. The signature data storage device is used to store a plurality of reference air signature files, each of which corresponds to a signature account. The second communication device is used to establish a communication channel with the first communication device of the writing pen to exchange data with the writing pen. The signature comparison device is used to perform feature comparison between the air signature file received from the writing pen and at least one reference air signature file in the signature data storage device, and when the approximate value of the feature comparison result is higher than a specific critical value and the difference between the first time and the second time and the comparison time is less than a specific value, it is determined that the air signature file and at least one of the reference air signature files are from the same provider.

[0009] The signature recognition method provided in the present application includes the following steps: starting a writing pen; wherein the writing pen includes a body, an inducer, and an air signature generator. The body includes a writing end and a motion sensing end, the writing end and the motion sensing end are separated by a holding reference point, and the segment from the writing end to the holding reference point and the segment from the motion sensing end to the holding reference point form an angle of at least 90 degrees. The inducer is disposed at the writing end. The air signature generator is disposed at the motion sensing end, and the air signature generator includes a motion sensing device, a first communication device, and a control device. The motion sensing device is used to sense the three-dimensional spatial motion of the motion sensing end, and outputs the reading of at least one dimension of the three-dimensional spatial motion at intervals and continuously at a predetermined time. The first communication device is used to establish a communication channel with an external device in a wireless or wired manner. The control device is used to record a first time when the operation starts, and a second time when the reading of the motion sensing device is obtained and the operation stops, so as to generate an air signature file containing the first time, the reading of the motion sensing device and the second time; record the air signature file; perform feature comparison between the air signature file and one of the reference air signature files in a signature data storage device storing multiple reference signature files; and when the approximate value of the feature comparison result is higher than a specific critical value, and the difference between the first time, the second time or a combination thereof and the comparison time is less than a specific value, determine that the air signature file and the reference air signature file are from the same provider.

[0010] In some preferred embodiments of the present application, the signature recognition method includes the following steps: starting a writing pen to receive an aerial signature sent by the writing pen; starting a writing trajectory generating device, the writing trajectory generating device captures the motion trajectory of the writing pen and generates a plane signature describing the motion trajectory; the plane signature includes start time information and end time information of the motion trajectory; performing feature comparison between the aerial signature sent by the writing pen and a reference aerial signature in a signature data storage device storing a plurality of reference signatures, and performing feature comparison between the plane signature received from the writing trajectory generating device and at least one reference plane signature in the signature data storage device; when the approximate value of the feature comparison result between the aerial signature and the reference aerial signature is higher than a first critical value and the approximate value of the feature comparison result between the plane signature and the reference plane signature is higher than a second critical value, judging that the two aerial signatures are from the same provider; and outputting the judgment result.

[0011] To further understand the features and technical contents of the present application, please refer to the following detailed description and drawings of the present application. However, the drawings provided are only for reference and illustration and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the use status of the signature recognition system according to an embodiment of the present application.

[0013] Figure 2 This is a schematic diagram of the structure of a writing pen according to an embodiment of the present application.

[0014] Figure 3 4 is a system block diagram of a signature recognition system according to an embodiment of the present application.

[0015] Figure 4 A flowchart of one embodiment of the signature recognition method of the present application.

[0016] Figure 5 This is a flow chart of another embodiment of the signature recognition method of the present application. DETAILED DESCRIPTION

[0017] The present application provides a signature recognition system and method based on air signature recognition technology. Although the present application is not limited by any technical principle or concept, the inventors have found that although the air signature recognition technology has been developed to a sufficient level for application, it all uses the motion trajectory of the free end of a human limb as a signature. As a result, a large space is required for air signature, making the air signature recognition technology unable to be applied in daily life.

[0018] According to the design of this application, the air signature refers to the motion track of the non-writing end of the writing pen in three-dimensional space. Since the non-writing end is usually farther from the motion axis of the writing pen than the writing end when writing, the motion track of the non-writing end is appropriately magnified to become a valuable air signature. This air signature can be used as a biometric feature and become the basis for identifying the identity of the signer.

[0019] The following is a description of the implementation methods of the "writing pen, signature recognition method and system thereof" disclosed in this application through specific embodiments. Those skilled in the art can understand the advantages and effects of this application from the contents disclosed in this specification. This application can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the concept of this application. In addition, the term "or" used in this article may include any one or more combinations of the associated listed items depending on the actual situation.

[0020] See also Figures 1 to 3, respectively, are a schematic diagram of the use state of the signature recognition system of the embodiment of the present application, a schematic diagram of the structure of the writing pen, and a system block diagram of the signature recognition system. As shown in the figure, the signature recognition system based on air signature recognition of the present application mainly includes a writing pen 10 and a signature recognition device 20; wherein the writing pen 10 can be a signature pen, but is not limited thereto. The signature recognition system usually also includes a writing trajectory generating device 30, such as a touch screen; however, the writing trajectory generating device 30 can also be any device that can record the motion trajectory of the writing end 101 of the writing pen 10 on the surface of the writing trajectory generating device 30 when the writing end 101 of the writing pen 10 touches or approaches, such as a capacitive or other form of signature board. In a preferred embodiment of the present application, the writing pen 10 has wireless communication capability and can establish a wireless communication channel with the signature recognition device 20 to exchange data. The writing trajectory generating device 30 is usually connected to the signature recognition device 20 in a wired manner to transmit the motion trajectory data of the writing end 101 recorded by the writing trajectory generating device 30 to the signature recognition device 20. In multiple embodiments of the present application, the signature recognition device 20 is configured in a computer device (such as a desktop computer, a laptop computer, a tablet computer, a smart phone, etc.), and the writing track generating device 30 (such as a touch screen) is the touch screen of the computer device. Of course, other types of devices, devices, and other types of communication methods can be applied in the present application.

[0021] Cooperate Figure 2 As shown, the writing pen 10 of the present application can be formed into a long rod shape to facilitate hand-holding, but is not limited thereto. According to an embodiment of the present application, the greater the ratio of the distance from the non-writing end to the holding reference point to the distance from the writing end to the holding reference point, the better the recognition effect. Therefore, the shape of the writing pen 10 mainly includes a rod-shaped body 100, that is, a slender body, and provides a holding section, and the holding section includes a holding reference point 10P. The holding reference point 10P refers to the center point around which the body 100 moves when the body 100 is held by hand to sign.

[0022] Furthermore, the writing pen 10 also includes a writing end 101 and a motion sensing end 102 of the writing end 101 relative to the holding reference point 10P. As mentioned above, the distance from the motion sensing end 102 to the holding reference point 10P should be greater than the distance from the writing end 101 to the holding reference point 10P, and the ratio is preferably between 2 and 10 times, more preferably between 2 and 5 times, and preferably 2.5 times. In addition, in order to amplify the motion trajectory magnification of the motion sensing end 102, the line connecting the writing end 101 to the holding reference point 10P and the line connecting the motion sensing end 102 to the holding reference point 10P form an angle a of at least 90 degrees, and the angle a is preferably between 120 degrees and 180 degrees, and preferably between 160 degrees and 180 degrees; usually, the angle a is 180 degrees to facilitate the manufacture of the writing pen 10, but the angle is not any technical limitation.

[0023] Among them, the inducer 11 of the writing track is arranged at the writing end 101, so as to generate a writing track on the sensing surface 32 of the writing track generating device 30. The sensing surface 32 is usually a sensing surface set on an electronic device (not shown in the figure) such as a computer device, a tablet device, a mobile device, a card reader, etc. In the common application of the present application, the sensing surface 32 is configured on a capacitive electronic device to provide a plane, and a plurality of sensing units are arranged below the plane. Each sensing unit is usually a capacitor unit, which can trigger the action of the sensing unit when the inducer 11 passes through the sensing unit to change its state, such as changing the capacitance value. The distribution of the state change on the plane constitutes the trajectory of the inducer 11 moving on the plane. The material of the inducer 11 can adopt the material of the capacitive touch pen head currently on the market, such as conductive materials including conductive cotton, rubber with conductive paint on the surface, conductive silicone, conductive fiber, etc., and the shape of the inducer is not limited.

[0024] Figure 2 The writing pen 10 of one embodiment of the present application may also have an air signature generator 12, which is disposed at the motion sensing end 102. The structure of the air signature generator 12 mainly includes a motion sensing device 121, a first communication device 122, a control device 123 and a power supply 124.

[0025] The motion sensing device 121 is used to sense the three-dimensional motion of the motion sensing end 102, and outputs the reading of at least one dimension of the three-dimensional motion at predetermined intervals and continuously. For example, the motion sensing device 121 can output a reading every three seconds within one minute, but is not limited to this. The motion sensing device 121 is a motion sensing device suitable for use in the writing pen 10 of the present application, including various commercially available inertial sensing components, such as accelerometers, gyroscopes, magnetometers, etc. This type of motion sensing device is usually made into a chip and provides single-axis, two-axis, three-axis, six-axis or nine-axis sensing capabilities. Therefore, the reading can also be a two-dimensional or three-dimensional reading.

[0026] The first communication device 122 is used to establish a communication channel with an external device in a wireless or wired manner. The first communication device 122 is a communication device applied to the writing pen of the present application, including various commercially available communication circuit chips or modules. The wired communication channel can be a USB channel, a Type C channel, etc. The wireless communication channel can be a Bluetooth, IEEE, etc. channel. The relevant technologies and applications are already well known to the industry.

[0027] The control device 123 is connected to the motion sensing device 121 and the first communication device 122 to receive the sensing result information of the motion sensing device 121 and process the sensing result information, and transmit it to the external device via the first communication device 122. In a preferred embodiment of the present application, the control device 123 is configured to: after receiving the start detection instruction, record the current time (i.e., the current time) as the first time, obtain the reading value of the motion sensing device 121, and after receiving the stop sensing instruction, record the current time (i.e., the current time) as the second time, so as to generate an air signature file containing the first time, the reading value of the motion sensing device 121 and the second time, and activate the first communication device 122 to transmit the data (i.e., the air signature file) to the outside world (such as an external device, but not limited to this). The control device 123 can be a circuit module or other commercially available controller products, and is already a mature product on the market. For example, the chip used by the aforementioned motion sensing device 121 usually already includes an applicable control device 123, so that the above-mentioned and other functions related to motion sensing can be provided.

[0028] The power supply 124 is connected to the motion sensing device 121, the first communication device 122 and the control device 123 to provide power to the motion sensing device 121, the first communication device 122 and the control device 123. Power supply modules (such as dry cells or lithium batteries, but not limited thereto) used in various electronic components can be applied to the present application. The power supply 124 can also provide a power cord (not shown in the figure) for plugging into a power plug.

[0029] The body 100 of the writing pen 10 may further include a switch 13 to generate at least one start detection instruction and one stop detection instruction. In a preferred embodiment of the present application, the switch 13 may be a key switch, an electrostatic switch, a pressure sensing switch, etc., but a pressure sensing switch is more suitable.

[0030] In certain embodiments of the present application, the control device 123 may further include an air trajectory description device 1230 for generating corresponding air trajectory description data according to the reading value of the motion sensing device 121, and the air trajectory description data describes the motion trajectory of the motion sensing terminal 102 between the first time and the second time. As mentioned above, the motion trajectory may be a one-dimensional, two-dimensional or three-dimensional motion trajectory. For example, the air trajectory description device 1230 may generate a three-dimensional motion trajectory description file according to a set of three-dimensional motion trajectory sensing information. In this embodiment, the air signature file sent by the control device 123 to the external device via the first communication device 122 includes the trajectory description data.

[0031] Please refer to Figure 3 , to illustrate the signature recognition device 20. Figure 3 As shown, the signature recognition device 20 mainly includes a signature data storage device 21, a second communication device 22 and a signature comparison device 23. The signature recognition device 20 can be any commercially available card reader, but is not limited thereto.

[0032] The signature data storage device 21 is used to store a plurality of reference air signature files, each of which corresponds to a signature account.

[0033] The second communication device 22 is used to establish a communication channel with the first communication device 122 of the writing pen 10 to exchange data with the writing pen 10 .

[0034] The signature comparison device 23 is used to compare the features of an air signature received from the writing pen 10 with at least one reference air signature in the signature data storage device 21, and to determine that the two air signatures are from the same provider when the approximate value of the feature comparison result is higher than a specific critical value. In a preferred embodiment of the present application, the signature comparison device 23 is further configured to determine that the two air signatures are from the same provider only when the difference between the first time, the second time, or a combination thereof and the comparison time is less than a specific value.

[0035] According to the present application, the signature comparison device 23 should have the ability to compare air signatures. The so-called air signature comparison may include comparing a three-dimensional space trajectory describing the motion sensing end 102 of the writing pen 10 in the air with another three-dimensional space trajectory describing the motion sensing end 102 of the writing pen in the air (i.e., a reference air signature file), and judging whether they are from the same signer according to whether the similarity of the three-dimensional space trajectories of the two is higher than a specific critical value. For example, if the similarity of the two three-dimensional space trajectories is 90%, which is higher than a specific critical value (85%), it is judged that the two three-dimensional space trajectories are from the same signer. However, it is also possible to compare a plane trajectory formed by projecting a trajectory describing the motion sensing end 102 of the writing pen 10 in the air on a specific plane with another plane trajectory formed by projecting a trajectory describing the motion sensing end 102 of the writing pen 10 in the air on a specific plane (i.e., the reference plane signature file described later) to judge whether they are from the same signer. Among them, the judgment method of the plane trajectory can be the same as the judgment method of the above-mentioned three-dimensional space trajectory.

[0036] As for the comparison of three-dimensional space trajectories, there is currently a dynamic time warping method available for application. As for the comparison method of two-dimensional space trajectories, it is a fairly mature technology. It is also a common technology to convert the trajectory of three-dimensional space into a projected plane trajectory on a specific plane. The inventors have found that in fact, only the comparison method of two-dimensional space trajectories is needed to provide a correct judgment. At least because in the embodiment described below, a plane signature comparison step is also used to improve the comparison effect of the air signature.

[0037] In order to provide a plane signature comparison function, in some preferred embodiments of the present application, the signature data storage device 21 additionally stores a plurality of reference plane signature files, each of which corresponds to a reference air signature file and a signature account. In this embodiment, the second communication device 22 is also configured to establish a communication channel with the writing trajectory generating device 30 to exchange data. Alternatively, a third communication module 24 is provided in the signature recognition device 20 to establish a communication channel with the writing trajectory generating device 30. As mentioned above, the writing trajectory generating device 30 provides a sensing surface 32 that can interact with the inducer 11, thereby recording the movement of the inducer 11 on the sensing surface 32 and generating a plane signature file describing the movement trajectory. In application, the plane signature file includes the start time information and the end time information of the movement.

[0038] According to the design of the present application, in a preferred embodiment of the present application, the step of comparing the signature by the signature comparison device 23 includes:

[0039] A feature comparison is performed between an air signature received from the writing pen and at least one reference air signature in the signature data storage device, and when the approximate value of the feature comparison result is higher than a specific critical value and the difference between the first time, the second time or a combination thereof and the start time, the end time or a combination thereof is less than a specific value, it is determined that the two air signatures are from the same provider. For example, the signature data storage device 21 or the signature comparison device 23 may store data related to the start time and the end time in advance; when the time difference between the first time and the second time is 20 seconds, the time difference between the start time and the end time is 25 seconds, and the difference between 20 seconds and 25 seconds is less than a specific value (for example, 6 seconds), it is determined whether the two air signatures are from the same provider in conjunction with the feature comparison result, but the time comparison method is not limited to this.

[0040] In some other preferred embodiments of the present application, the step of comparing the signature by the signature comparison device 23 includes:

[0041] Compare the features of an aerial signature received from the writing pen with at least one reference aerial signature in the signature data storage device, and compare the features of a plane signature received from the writing trajectory generating device with at least one reference plane signature in the signature data storage device; and

[0042] When the approximate value of the feature comparison result between the air signature and the reference air signature is higher than the first critical value (the comparison method can refer to the aforementioned content, the first critical value can be defined as 85%, but not limited to this), and the approximate value of the feature comparison result between the plane signature and the reference plane signature is higher than the second critical value (the comparison method can refer to the aforementioned content, the first critical value can be defined as 90%, but not limited to this), it is determined that the two air signatures are from the same provider.

[0043] In addition, in other preferred embodiments of the present application, the step of comparing the signature by the signature comparison device 23 includes:

[0044] Compare the features of an aerial signature received from the writing pen with at least one reference aerial signature in the signature data storage device, and compare the features of a plane signature received from the writing trajectory generating device with at least one reference plane signature in the signature data storage device; and

[0045] When the approximate value of the feature comparison result between the aerial signature and the reference aerial signature is higher than the first critical value, and the approximate value of the feature comparison result between the plane signature and the reference plane signature is higher than the second critical value, and the difference between the first time, the second time or a combination thereof and the start time, the end time or a combination thereof is less than a specific value, it is determined that the two aerial signatures are from the same provider.

[0046] Several preferred embodiments of the signature recognition method of the present application are described below. Figure 4 This is a flow chart of one embodiment of the signature recognition method of the present application. As shown in the figure, the signature recognition method provided by the present application includes the following steps:

[0047] First, in step S301, the writing pen 10 is started, and the writing pen 10 can be one of the various writing pens mentioned above. Then, in step S302, a first time of starting the operation is recorded, the reading value of the motion sensing device 121 is obtained, and the second time of stopping the operation is recorded to generate an air signature file containing the first time, the reading value of the motion sensing device 121 and the second time. Next, in step S303, the air signature file is feature-matched with a specific reference air signature file in the signature data storage device 21 storing multiple reference signature files. The specific reference air signature file can be specific according to the number, name and other data input by the user before the writing pen 10 starts recording the air signature trajectory. In this way, it is not necessary to compare with all the signature files in the signature data storage device 21. Finally, in step S304, when the approximate value of the feature comparison result is higher than a specific critical value and the difference between the first time and the second time and the comparison time is less than a specific value, step S305 is entered to determine whether the two air signatures (i.e., the air signature and the reference air signature) are from the same provider; if the feature comparison result does not meet the above conditions, it is determined that the two air signatures are from different providers, and then step S301 is executed again, or the writing pen 10 can issue a warning signal and no operation is performed.

[0048] As mentioned above, the signature recognition method of the present application may also further include the steps of generating motion trajectory data describing the motion trajectory of the motion sensing device 121 according to the reading value of the motion sensing device 121, and including the motion trajectory data in the air signature. The motion trajectory may be one-dimensional, two-dimensional or three-dimensional.

[0049] In some preferred embodiments of the present application, the signature recognition method may further include comparing the plane signature trajectory. Figure 5 The signature recognition method of the present application may include the following steps:

[0050] First, in step S401, the writing pen 10 is started, and a writing track generating device 30 is started at the same time. Then, in step S402, an air signature sent by the writing pen 10 is received. Next, in step S403, the writing track generating device 30 captures the motion track of the writing pen 10 and generates a plane signature describing the motion track. The air signature and the plane signature both include the start time information and the end time information of the motion track (acquisition data).

[0051] Next, in step S404, the plane signature sent by the writing track generating device 30 is compared with a reference plane signature in a signature data storage device 21 storing a plurality of reference signatures, and the air signature received from the writing pen 10 is compared with at least one reference air signature in the signature data storage device 21. Next, in step S405, when the approximate value of the feature comparison results of the two is higher than a specific critical value and the difference between the first time, the second time or a combination thereof and the start time, the end time or a combination thereof is less than a specific value, then step S406 is entered to determine that the two air signatures and the two plane signatures are from the same provider, that is, the plane signature and the reference plane signature are from the same provider and the air signature and the reference air signature are from the same provider; and if the feature comparison results of the two do not meet the above conditions, then it is determined that the two air signatures and the two plane signatures are from different providers, and then step S401 is executed again, or at least one of the writing pen 10, the signature recognition device 20, and the writing track generating device 30 may issue a warning signal and not operate.

[0052] In other embodiments of the present application, step 404 may also be configured as follows:

[0053] Compare the features of an aerial signature received from the writing pen 10 with at least one reference aerial signature in the signature data storage device 21, and compare the features of a plane signature received from the writing trajectory generating device 30 with at least one reference plane signature in the signature data storage device 21; and

[0054] When the approximate value of the feature comparison result between the air signature and the reference air signature is higher than a first critical value and the approximate value of the feature comparison result between the plane signature and the reference plane signature is higher than a second critical value, it is determined that the two air signatures are from the same provider.

[0055] The above signature recognition method can be applied to various controls. For example, requesting approval of an operation, especially an operation related to electronic devices, e-commerce, and information applications. In this operation, the system (especially the cloud system) receives an operation request, activates the writing pen, and performs signature recognition. If the recognition is successful, the operation is performed according to the request; if the recognition is unsuccessful, a warning signal is issued and the operation is not performed.

[0056] As described above, the present application provides a novel signature comparison mechanism. The present application provides a writing pen, and the non-writing end of the writing pen is equipped with a motion sensing device. When a user uses the writing pen to write on a plane writing trajectory generating device, in addition to recording the plane writing trajectory, the motion trajectory of the non-writing end (i.e., the motion sensing end 102) is also recorded. During the comparison, when the motion trajectory is successfully compared, the plane writing trajectory is successfully compared, the motion trajectory is successfully compared with the plane writing trajectory, or any of the above three is correct with the time difference calculation result, it can be judged that the plane signature, the air signature, or both are from a specific user. Under the design of the present application, not only the accuracy of signature authentication can be improved, but also the technical threshold of air signature can be lowered.

[0057] The contents disclosed above are only preferred feasible embodiments of the present application, and are not intended to limit the protection scope of the claims of the present application. Therefore, all equivalent technical changes made using the contents of the present application specification and drawings are included in the protection scope of the claims of the present application.

Claims

1. A writing pen, characterized in that: include: A body, the body comprising a writing end and a motion sensing end as a non-writing end, the writing end and the motion sensing end being separated by a holding reference point, the holding reference point being a center point around which the body moves when the body is held by hand to sign; an inducer, the inducer being disposed at the writing end and being used to generate a writing track on the sensing surface; An air signature generator, the air signature generator is arranged at the motion sensing end, and the air signature generator comprises: A motion sensing device, the motion sensing device is used to sense the three-dimensional spatial motion of the motion sensing end, and output a reading value of at least one dimension of the three-dimensional spatial motion at predetermined time intervals and continuously; A first communication device, the first communication device is used to establish a communication channel with an external device in a wireless or wired manner; a control device connected to the motion sensing device and the first communication device to receive sensing result information of the motion sensing device, process the sensing result information, and transmit the sensing result information to the external device via the first communication device; and a power supply connected to the motion sensing device, the first communication device, and the control device to provide power to the motion sensing device, the first communication device, and the control device; The control device is configured to: record the current time as the first time after receiving the start detection instruction, obtain the reading of the motion sensing device and record the current time as the second time after receiving the stop sensing instruction, so as to generate an air signature file containing the first time, the reading of the motion sensing device and the second time, and activate the first communication device to transmit the air signature file to the external device; Wherein, the control device further comprises an air trajectory description device, the air trajectory description device is used to generate corresponding air trajectory description data according to the reading value of the motion sensing device, and the air trajectory description data describes the motion trajectory of the motion sensing end between the first time and the second time; wherein the motion trajectory is a one-dimensional, two-dimensional or three-dimensional motion trajectory; and the air signature file transmitted by the control device to the external device via the first communication device includes the air trajectory description data, The distance from the motion sensing end to the holding reference point is greater than the distance from the writing end to the holding reference point; wherein the distance from the motion sensing end to the reference point is 2 to 10 times the distance from the writing end to the reference point.

2. The writing pen according to claim 1, characterized in that: The section from the writing end to the holding reference point and the section from the motion sensing end to the holding reference point form an angle of at least 90 degrees.

3. The writing pen according to claim 1, characterized in that: The body of the writing pen further comprises a switch, and the switch generates at least one start detection instruction and a stop detection instruction; wherein the switch is a pressure sensing switch.

4. A signature recognition system, characterized in that: include: at least one writing pen according to any one of claims 1 to 3; as well as A signature recognition device, comprising: A signature data storage device, the signature data storage device is used to store a plurality of reference air signature files, each of the reference air signature files corresponds to a signature account; a second communication device, the second communication device being used to establish a communication channel with the first communication device of the writing pen so as to exchange data with the writing pen; and A signature comparison device, wherein the signature comparison device is used to perform feature comparison between the air signature received from the writing pen and at least one reference air signature in the signature data storage device, and to determine that the air signature and at least one reference air signature are from the same provider when the approximate value of the feature comparison result is higher than a specific critical value and the difference between the first time, the second time, or the combination of the first time and the second time and the comparison time is less than a specific value.

5. The signature recognition system according to claim 4, characterized in that: The signature data storage device further stores a plurality of reference plane signatures, each of which corresponds to a reference air signature and a signature account; wherein the second communication device is configured to establish a communication channel with the writing trajectory generating device to exchange data; wherein the writing trajectory generating device provides a sensing surface that interacts with the inducer, thereby recording the motion trajectory of the inducer on the sensing surface to generate a plane signature describing the motion trajectory; the plane signature includes the start time information and the end time information of the motion trajectory; Wherein, the signature comparison device is further configured to: perform feature comparison between the aerial signature received from the writing pen and at least one of the reference aerial signatures in the signature data storage device, and perform feature comparison between the plane signature received from the writing trajectory generating device and at least one of the reference plane signatures in the signature data storage device; and when the approximate value of the feature comparison result between the aerial signature and the reference aerial signature is higher than a first critical value and the approximate value of the feature comparison result between the plane signature and the reference plane signature is higher than a second critical value, determine that the aerial signature and at least one of the reference aerial signatures are from the same provider.

6. The signature recognition system according to claim 5, characterized in that: The signature comparison device is further configured to determine that the air signature and at least one of the reference air signatures are from the same provider when the approximate value of the feature comparison result between the air signature and the reference air signature is higher than a first critical value, and the approximate value of the feature comparison result between the plane signature and the reference plane signature is higher than a second critical value, and the difference between the first time, the second time, or the combination of the first time and the second time and the start time, the end time, or the combination of the start time and the end time is less than a specific value.

7. A signature recognition method, characterized in that: The following steps are involved: Starting the writing pen, wherein the writing pen is the writing pen according to any one of claims 1 to 3; Recording the air signature; Performing feature comparison between the air signature and one of the reference air signatures in a signature data storage device storing a plurality of reference air signatures; When the approximate value of the result of the feature comparison is higher than a specific threshold value and the difference between the first time, the second time and the comparison time is less than a specific value, it is determined that the air signature and the reference air signature are from the same provider; otherwise, it is determined that they are from different providers; as well as Output the judgment result.

8. The signature recognition method according to claim 7, characterized in that: The signature recognition method also includes the following steps: after starting the writing pen, causing the control device of the writing pen to generate motion trajectory data describing the motion trajectory of the motion sensing device according to the reading value of the motion sensing device, and including the motion trajectory data in the air signature file; wherein the motion trajectory is two-dimensional or three-dimensional; wherein the reference air signature file is a two-dimensional trajectory description file, and the feature comparison step of the air signature file also includes the step of converting the air signature trajectory of the air signature file into a projection description file of the air signature trajectory on a plane.

9. A signature recognition method, characterized in that: The following steps are involved: Activate the writing pen to receive the air signature transmitted by the writing pen, wherein the writing pen is the writing pen described in any one of claims 1 to 3; Starting a writing trajectory generating device, the writing trajectory generating device captures the motion trajectory of the writing pen and generates a plane signature file describing the motion trajectory; wherein the plane signature file includes the start time information and the end time information of the motion trajectory; Performing feature comparison between the aerial signature received from the writing pen and at least one reference aerial signature in the signature data storage device, and performing feature comparison between the plane signature received from the writing trajectory generating device and at least one reference plane signature in the signature data storage device; When the approximation of the feature comparison result between the air signature and the reference air signature is higher than a first critical value and the approximation of the feature comparison result between the plane signature and the reference plane signature is higher than a second critical value, determining that the air signature and the reference air signature are from the same provider; and Output the judgment result.

10. The signature recognition method according to claim 9, characterized in that: The step of determining that the air signature and the reference air signature are from the same provider also includes: When the approximate value of the feature comparison result between the air signature and the reference air signature is higher than the first critical value, and the approximate value of the feature comparison result between the plane signature and the reference plane signature is higher than the second critical value, and the difference between the first time, the second time, or the combination of the first time and the second time and the start time, the end time, or the combination of the start time and the end time is less than a specific value, it is determined that the air signature and the reference air signature are from the same provider.

11. The signature recognition method according to claim 9, characterized in that: The signature recognition method also includes the following steps: after starting the writing pen, causing the control device of the writing pen to generate motion trajectory data describing the motion trajectory of the motion sensing device according to the reading value of the motion sensing device, and including the motion trajectory data in the air signature file; wherein the motion trajectory is two-dimensional or three-dimensional; wherein the reference air signature file is a two-dimensional trajectory description file, and the feature comparison step of the air signature file also includes the step of converting the air signature trajectory of the air signature file into a projection description file of the air signature trajectory on a plane.

12. The signature recognition method according to claim 11, characterized in that: The motion trajectory is a two-dimensional trajectory description file formed by converting the air signature trajectory into a projection description of the air signature trajectory on a plane.

Images