KR20180128627A - Access control method, access control device and access control system for fast access confirmation using bio signal - Google Patents

Abstract

The present invention relates to an access control method, an access control device and an access control system for fast access confirmation using bio data. The access control method includes: a step of a portable terminal recognizing a triggering audio signal using a designated frequency; a step of the portable terminal extracting the identification data of the access control device from the triggering audio signal; a step of the portable terminal comparing the extracted identification data and the identifier of the one or more stored access control devices; and a step of the portable terminal outputting an audio signal indicating a passenger who intends to enter and exit through the access control device according to a result of the comparison.

Description

TECHNICAL FIELD [0001] The present invention relates to an access control method, an access control device, and an access control system capable of quick access authentication using biometric data, an access control device,

The present invention relates to an access control method, an access control device, and an access control system capable of quick access authentication by utilizing biometric data, and more particularly, Access control device, and access control system capable of efficiently performing access control by utilizing biometric data.

Access control devices are known. The access control device is provided with various types of authentication means and is configured to be able to open and close (control) the entrance door connected to the entrance authentication through the authentication means. The authentication means may be, for example, a card reader, a password reader, a fingerprint reader, an iris reader, a Bluetooth module, or the like.

The authentication using the card reader or the password recognition is not used due to the loss of the card, the loss or forgetting of the password. The Bluetooth module receives the access identification code from the accessing party in cooperation with the portable terminal of the accessing party, and controls the access through the accessing identification code.

There is a simple aspect of access control through the Bluetooth module, but there is a limitation in using Bluetooth in order to increase the power consumption of the portable terminal. Further, there is a problem that unauthorized access to the portable terminal is possible when the portable terminal is lost.

As described above, there are various limitations in access authentication through the existing card recognizer, password recognition and Bluetooth module.

On the other hand, a fingerprint recognizer or an iris recognizer can use the biometric signal such as a fingerprint of a passenger or an iris of an eye to authenticate the passenger himself / herself without having a separate authentication means. Accordingly, authentication means utilizing bio-signals are widely used.

Since the biological signal is a signal derived from the body of the user himself / herself, it is not necessary to provide any authentication means and the user can be authenticated accurately.

Biometric signals, on the other hand, must be configured to distinguish them from all accessable entrants. Biometric identifiers are configured to authenticate specific entrants by comparing a number of feature points. For example, a fingerprint recognizer authenticates a specific user by comparing data of feature points of approximately 100 points, and the iris recognizer can authenticate a specific user by comparing data of feature points of 200 or more points.

Access control using such a large number of feature points can be effective when there are fewer passengers accessing through a specific door, but when there are many passengers allowed to enter (for example, 100 or more) There is a problem that the time required for authentication is increased because the user authentication is performed by comparison.

Accordingly, there is a limit to the application of access control through biometric authentication to a door where many people can enter.

Thus, there is a need for an access control method, an access control device, and an access control system capable of quick access authentication by utilizing biometric data that can solve various problems caused by accessing through biometrics.

10-2016-0051495 (A), May 11, 2016

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a portable terminal which is capable of quickly accessing and authenticating by using biometrics data, An access control device, and an access control system.

In addition, the present invention recognizes the access control device using the existing audio codec of the portable terminal, outputs the non-audible audio signal after the access control device is recognized, enables the primary authentication of the portable terminal, An access control method, an access control device, and an access control system capable of quick access authentication using biometric data enabling a biometric authentication as an object are provided.

In addition, the present invention can reduce the authentication range from the biometric data associated with the audio signal among the biometric data of all the passengers who can enter and leave the audio signal output by using the audio function that has already been activated without activating a separate function of the portable terminal An access control device, and an access control system capable of quick access authentication using biometric data based on the biometrics data.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

An access control method capable of quick access authentication using biometric data according to an aspect of the present invention includes the steps of the portable terminal recognizing a triggering audio signal using a designated frequency, Comparing the extracted identification data with an identifier of one or more access control devices stored in the portable terminal, and outputting an audio signal indicating a passenger who intends to access the portable terminal through the access control device .

In the access control method described above, in the case where the extracted identification data matches the identifier of the one or more access control devices stored in the portable terminal, the outputting step uses the designated identification data stored in the portable terminal as an audio signal And outputs it.

In the access control method described above, the audio signal encoding the triggering audio signal and the access identification data is a signal encoded through the audio DAC using the same designated frequency of 22 KHz to 192 KHz.

In the access control method, the access control device extracts access data for identification from the audio signal, the access control device extracts the biometric identification data from the biometric signal, the access control device extracts biometric data from the biometric signal, Comparing the biometric authentication data with the biometric identification data, and controlling the entrance control device to access the entrance according to the result of the comparison.

In the access control method described above, the access identification data is extracted a plurality of times before the biometric identification data is extracted, and the step of comparing the biometric authentication data and the biometric identification data includes a step of extracting the access identification And compares the biometric authentication data corresponding to the data with the biometric identification data.

In the access control method described above, the access identification data is extracted a plurality of times before the biometric identification data is extracted, and the comparison step of the biometric authentication data and the biometric identification data is performed for a specified number of accesses And compares the biometric authentication data corresponding to the identification data with the biometric identification data.

 An access control device capable of quick access authentication by utilizing biometric data according to an aspect of the present invention includes an audio transceiver for recognizing an audio signal and outputting the recognized audio signal as a digital audio stream, A biometric signal receiving unit for outputting biometric data representing the biometric data, and a biometric signal receiving unit for extracting biometric identification data from the biometric data, comparing the biometric authentication data corresponding to the access identification data with the biometric identification data, Wherein the audio signal is generated by a portable terminal that recognizes a triggering audio signal output by the access control device, extracts an identifier of the access control device from the recognized triggering audio signal, And outputs the signal to indicate the passenger who intends to enter and exit through the access control device according to the comparison result.

In the access control device, the controller controls the audio transceiver to periodically output the triggering audio signal through the audio transceiver, and the audio signal recognized and output through the audio transceiver is transmitted using the same designated frequency of 22 KHz to 192 KHz The control unit controls the audio transmitting / receiving unit to receive the digital audio stream according to a sampling period in which the designated frequency can be recovered, and extracts the access identification data encoded in the audio signal.

The access control device may further include a storage unit configured to store a plurality of pieces of biometric authentication data corresponding to each of the passengers who are permitted to enter and exit, and the control unit may extract the biometric signal through the biometric signal receiving unit The biometric authentication data stored in the storage unit is compared with the biometric identification data to control the opening and closing of the associated door, or a predetermined number of access identifications extracted from before the recognition of the biometric signal through the biometric signal receiver And biometric identification data stored in the storage unit and the biometric identification data to control the opening and closing of the associated door.

An access control system capable of quick access authentication using biometric data according to an aspect of the present invention includes the access control device described above.

The access control system further includes a plurality of portable terminals capable of outputting an audio signal to the access control device: the portable terminal recognizes a triggering audio signal encoded at a designated frequency that is a non-audible frequency, And outputs it as an audio signal having a specified level or higher.

The access control method, the access control device and the access control system capable of quick access authentication using the biometric data according to the present invention can quickly authenticate the user through biometrics utilizing the audio signal output from the portable terminal .

Also, the access control method, the access control device and the access control system capable of prompt access authentication using the biometric data according to the present invention can recognize the access control device using the existing audio codec of the portable terminal, It is possible to output the non-audible audio signal after the recognition, thereby enabling the primary authentication of the portable terminal and enabling the biometric authentication to be performed for the passengers limited to the primary authentication.

Also, the access control method, the access control device and the access control system capable of quick access authentication by utilizing the biometric data according to the present invention can use an already-existing audio function without activating a separate function of the portable terminal There is an effect that the authentication range can be reduced by the biometric data associated with the audio signal from the biometric data of all the passengers who can enter and leave the output audio signal.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

FIG. 1 is a diagram showing an exemplary inter-device connection of an access control system for enabling quick access authentication using biometric data.
2 is a block diagram illustrating an exemplary portable terminal.
3 is a diagram showing an exemplary flow of outputting identification data for access.
4 is a block diagram of the access control device.
5 is a diagram showing an exemplary flow of performing access authentication quickly using biometric data.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: It can be easily carried out. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram showing an exemplary inter-device connection of an access control system for enabling quick access authentication using biometric data.

1, the access control system includes one or more portable terminals 100, an access control device 200, and a door 300.

1, the portable terminal 100 is a device carried by a user (a guest) who uses the access control system. The portable terminal 100 may be, for example, a smart phone, a tablet PC, a notebook computer, or the like.

The portable terminal 100 is configured to receive and output at least an audio signal and may preferably be a smart phone or a tablet PC. The portable terminal 100 preferably includes an audio codec 109 (an audio processing unit capable of processing CODEC, ADC, and DAC), a microphone 113 and a speaker 111 connected to the audio codec 109 .

The portable terminal 100 can receive an audio signal that is a vibration signal from the outside of the microphone 113 and converts the received audio signal into a digital audio stream through the internal audio codec 109, It is possible to recognize the triggering audio signal output from the access control device 200 The triggering audio signal is encoded in accordance with the promised format and at least using a designated frequency that is recoverable at a sampling rate (period) that can be sampled in the audio codec 109.

When the portable terminal 100 extracts the identifier of the access control device 200 from the triggering audio signal and matches one of the one or more identifiers of the access control device 200 in which the extracted identifier is stored, And outputs it as an audio signal through a speaker 111 connected to the audio CODEC 109. The audio CODEC 109 outputs the audio signal as an audio signal. The audio signal may be transmitted to the access control device 200 outputting the triggering audio signal.

The portable terminal 100 is configured to output an audio signal of a specified level or higher. For example, the portable terminal 100 controls the gain of the audio codec 109 so that the audio signal can be recognized by the access control device 200 within a certain distance (for example, 3 m, 5 m, etc.) Level audio signal. This designated level can be calculated through a delivery model of the audio signal in air or can be determined through an experiment in conjunction with the access control device 200.

The designated frequency used for recognition of the triggering audio signal and the designated frequency used for outputting the audio signal may be the same or different. At least the designated frequency may be selected at the non-audible frequency and may be a frequency selected, for example, between 22 KHz and 192 KHz. For example, the designated frequencies may be 22.05 KHz, 32 KHz, 44.1 KHz, 48 KHz, 88.2 KHz, 96 KHz, 192 KHz and the like.

The portable terminal 100 will be described in detail with reference to FIG. 2 and FIG.

The door 300 is connected to the access control device 200 and is configured to be openable and closable under the control of the access control device 200. The door 300 can be various types of doors and a user (a passenger) of the portable terminal 100 can enter and exit through a door 300 into a specific security area. The door 300 is provided with an opening / closing means controlled by the access control device 200 and is configured to open / close the door 300 by controlling the opening / closing means in accordance with a control signal from the access control device 200 .

The access control device 200 is installed in the door 300 or adjacent to the door 300 to control opening and closing of the door 300 through access authentication.

Preferably, the access control device 200 is configured to authenticate a user through a biometric signal and to control opening and closing of the access door 300 connected to the access control device 200 according to the authentication result. Also, the access control device 200 is configured to authenticate a user by further utilizing an audio signal output from the portable terminal 100. [

The access control device 200 transmits a triggering audio signal for guiding the output of the audio signal by the portable terminal 100 to the periodic audio signal through an audible frequency (for example, a frequency of 22 KHz or more) .

The access control device 200 can recognize the triggering audio signal and the audio signal encoding the access identification data from the air and extract the access identification data from the recognized audio signal. The access control device 200 can simply perform the biometric authentication using the biometric authentication data corresponding to the extracted access identification data.

The access control device 200 will be described in detail with reference to FIGS. 4 and 5. FIG.

2 is a block diagram illustrating an exemplary portable terminal 100. As shown in FIG.

2, the portable terminal 100 includes a communication interface 101, an input interface 103, an output interface 105, a memory 107, an audio codec 109, a speaker 111, a microphone 113, (115).

Referring to FIG. 2, the functions of the hardware configuration and the hardware configuration of the portable terminal 100 will be described. The communication interface 101 is an interface capable of transmitting and receiving communication packets through a mobile communication network or a local area network. The communication interface 101 is provided with a communication chipset (for example, a baseband chipset) for connecting to CDMA and GSM based mobile communication networks and / or a communication chipset for connecting to a wireless local area network such as wireless LAN and Bluetooth, Packets can be transmitted and received.

The input interface 103 includes a button, a touch panel, and a touch pad, and receives an input from a user of the portable terminal 100. A user of the portable terminal 100 may be a passenger who wants to enter and exit the entrance door 300. Through the input interface 103, the user of the portable terminal 100 can provide various inputs and can start or stop a specific program.

The output interface 105 outputs the data processed by the portable terminal 100. The output interface 105 includes a buzzer, a display, an LED diode, and the like, and outputs a result processed by the portable terminal 100. The output interface 105 may output various data related to access authentication including a display.

The memory 107 includes a volatile memory and / or a nonvolatile memory, and further includes a hard disk to store various data and programs. The memory 107 stores programs used on the processor 115 and data used in the programs.

For example, the memory 107 (non-volatile memory) is used in an access authentication program used for access authentication through the access door 300 and a user of the portable terminal 100 used in the access authentication program, And stores identification data for access that can be identified by the user. The access identification data is data for distinguishing a user of the portable terminal 100 as an accessing user from another user in the access control system, for example, a number (decimal or binary), a character, a symbol, and a combination thereof . The access identification data can be represented by a series of binary numbers (bits). For example, the access identification data may be represented by an ASCII code or a binary code and represented by a series of binary bit codes (data consisting of a series of '1' and '0'). The access identification data is preferably represented by a binary code of a certain number of bits (for example, 16 bits or 32 bits).

The memory 107 (nonvolatile memory) stores at least one identifier of the access control device 200 corresponding to the access door 300 into which the user of the portable terminal 100 can access. The identifier of the access control device 200 is composed of, for example, numerals (decimal or binary), characters, symbols, and combinations thereof as data for identifying the access control device 200 in the access control system. The identifier of the access control device 200 can be represented by a series of binary numbers (bits). For example, the identifier of the access control device 200 may be represented by an ASCII code or a binary code and represented by a series of binary bit codes (data consisting of a series of '1' and '0'). The identifier of the access control device 200 is preferably represented by a binary code of a predetermined number of bits (for example, 16 bits or 32 bits).

The access authentication program may be performed automatically after booting by the portable terminal 100 or may be performed by the user through the input interface 103. [ The access authentication program can be executed during the execution of another program (for example, a daemon program or a background program) and can be output to the access control device 200 connected to the door 300 via the audio signal .

The speaker 111 is connected to the audio CODEC 109 and converts an electric signal output from the audio CODEC 109 into an audio signal which is a vibration signal and outputs the audio signal to the air. The speaker 111 can output music, audio, and the like that can be heard by a general user, and can output an audio signal that can not be heard by a general user according to the present invention. The non-audible audio signal may be encoded using the non-audible frequency and may encode (include) identification data for the user of the portable terminal 100.

The microphone 113 converts the audio signal in the air into an electrical signal through the vibration sensing element and outputs the electrical signal to the audio codec 109. The microphone 113 is preferably configured to be able to sense the triggering audio signal encoded over the non-audible frequency.

The audio codec 109 (CODEC) encodes the digital audio stream output from the processor 115 into an electrical signal according to a specified sampling rate and outputs the electrical signal to the speaker 111, Into a digital audio stream in accordance with the designated sampling rate and outputs it to the processor 115. [

The audio codec 109 is constituted by a combination of an audio DAC (Digital Analog Converter) and an ADC (Analog Digital Converter) and outputs the digital audio stream from the processor 115 through the audio DAC to the speaker 111 as a series of corresponding electrical signals. . The audio CODEC 109 also outputs a series of electrical signals from the microphone 113 via the audio ADC to the processor 115, which encodes the electrical signal into a digital audio stream that represents the relative size of the electrical signal and is configured according to the sampling rate.

The audio codec 109 is configured to set the sampling rate in accordance with the control signal from the processor 115 and the sampling rate to be at least two times greater than the designated frequency of the non-audible. The sampling rate may, for example, have a sampling period between 44.1 KHz and 384 KHz and may be set to be 2, 4, 8, or 16 times higher than the designated frequency, and preferably set to at least 4 times.

The digital audio stream transmitted and received through the audio codec 109 is transmitted and received in accordance with an agreed format between the audio codec 109 and the processor 115. [ One audio sample (data) according to the sampling rate can be represented by the number of bits of a specified size, and for example, one sample can be represented by 16 bits and expressed as a value between 0 and 2, 16 -1.

The audio codec 109 can set, modify, and change the gain of the electric signal output to the speaker 111 in accordance with the control signal from the processor 115, set the gain for the electric signal input from the microphone 113, Modify, or modify the product.

The processor 115 controls the blocks of the portable terminal 100. The processor 115 is configured to be able to execute various programs stored in the memory 107 in accordance with user input or in the background, including one or more execution units capable of executing instruction codes of a program. The processor 115 represents or includes, for example, an application processor (AP), a CPU, an MPU, and the like.

The processor 115 may determine whether the portable terminal 100 is booted or the user selects it via the input interface 103. The processor 115 may be an access authentication program of the memory 107, Lt; / RTI > For example, the processor 115 may load the access authentication program of the nonvolatile memory into a volatile memory, a register in the processor 115, or the like, and execute the program in the execution unit.

The processor 115 transmits a control signal for setting the sampling rate of the audio codec 109, the output level of the audio signal, and the audio signal reception level through the control program interface (for example, I2C, etc.) And outputs it to the codec 109.

The sampling rate has a period of at least two times (preferably four times or more) than the frequency of the designated frequency (for example, the sampling rate is 88.2 KHz when the designated frequency is 22.05 KHz) Sets the size of the audio signal to be output. This output level is set so that the access control device 200 can recognize the audio signal output through the audio codec 109 within a certain distance (for example, 3 m, 5 m, etc.) Or may be determined through an experiment in conjunction with the access control device 200. The reception level is set so as to be able to recognize the audio signal from the access control device 200 through the microphone 113 within a certain distance (for example, equal to a certain distance of the output level of 3 m, 5 m, etc.) May be calculated through a signal transfer model or may be determined through an experiment in conjunction with the access control device 200.

After the setting of the audio codec 109, the processor 115 (access authentication program) receives the digital audio stream output from the audio codec 109 and extracts the identification data embedded in the promised packet format in the digital audio stream .

Specifically, the triggering audio signal of the access control device 200 is output to the speaker in accordance with the promised packet format, and the identifier is encoded and output in the triggering audio signal using the designated frequency.

The triggering audio signal may be comprised of a header field, a data field, a tail field, and a header field may be used for data synchronization by the portable terminal 100. The header field may be represented, for example, by a series of logic 1's of a certain number (e.g., nine), or a combination of logic 1's and logic 0's of the promised form. The format of this header field may be different from the data that can be represented in the data field.

The data field may be represented by a combination of the predetermined number of logic 1's and 0's. For example, the data field may be composed of a number of bits (for example, 16 bits, 32 bits, etc.) capable of expressing the identifier of the access control device 200.

The tail field indicates the end of the packet. The tail field can be represented by a combination of a series of logic 1's and 0's and is preferably configured to check for errors in the data field (and hence the header field). The tail field may include a CRC code, a parity error code, and the like.

Here, according to the present invention, an audio signal transmitted and received by encoding identification data is encoded at a designated frequency according to a packet format.

That is, the data in the header, data, and tail fields of the packet consists of a series of logic 1s and 0s, and the logic value is set to one of the non-audible frequencies (for example, 22.05KHz, 32KHz, 44.1KHz, etc.) ≪ / RTI >

For example, logic 1 can be represented by a specified frequency, and logic 0 can be represented by the absence of a specified frequency. Or logic 1 may be represented by a specified frequency of a particular phase and logic 0 may be represented by a designated frequency of another phase (such as a 180 degree phase shift). Or logic 1 may be represented by an additional frequency (eg, 10 Hz) added to the designated frequency and logic 0 may be represented by another frequency (eg, 40 Hz, etc.) added.

The packets thus encoded or extracted into the audio signal can be represented in the audio signal in various known ways using a designated frequency that is a non-audible frequency.

The processor 115 (access authentication program) receives the digital audio stream output from the audio codec 109 (audio ADC of the audio codec 109) and recognizes the packets of the format agreed upon in the received digital audio stream.

For example, the processor 115 (access authentication program) compares each sample of the digital audio stream with a reference value (e.g., the 15th power of 2, which is an intermediate value when the sample is 16 bits) Bit 1 and sample bit 0, respectively. For example, if each sample is larger than the reference value, it is classified as sample bit 1. If it is smaller, it is classified as sample bit 0.

The processor 115 (access authorization program) divides the sample bits of the samples corresponding to the designated frequency (the sampling rate is 88.2 KHz and the designated frequency is 22.05 KHz) into a logic 1 and a 0 The sequence (1,1,0,0, etc.) may represent the specified frequency or represent the absence of the specified frequency (0,0,0,0) or may represent the phase-shifted designated frequency (0,0,1,1) ) And then recognizes the packet by matching the values of logic 1 and 0 to the packet format.

The processor 115 (access authentication program) can synchronize the received packet through the recognition of the header field and align the designated frequency to the sample data.

When the packet is recognized by the recognition of the header field, the processor 115 (access authentication program) extracts the identification data embedded in the data field. In the process of extracting the identification data, an error of the identification data can be checked through the tail field, and the identification data can be used when there is no error.

Thereafter, the processor 115 (access authentication program) compares the extracted identification data with the identifiers of the one or more access control devices 200 stored in the memory 107, and compares the extracted identification data with the identification data of one access control device 200 If the identifiers match, it is recognized that the access door 300 is within a certain distance from the permitted door 300, and the access identification data stored in the memory 107 is encoded using the designated frequency and output as an audio signal. The output of identification data for access can be made periodically while recognizing the triggering audio signal.

Specifically, the processor 115 (access authentication program) recognizes the triggering audio signal from the specified access control device 200 and then outputs the access identification data in accordance with the packet format promised at a specific time (an appointed time or a random time) And outputs it to the audio codec 109 as a digital audio stream. The output packet format may be the same as or different from the packet format of the audio signal from the access control device (200). And may at least differ in the format of the header field (e. G., Having 10 logic values, etc.).

The structure of the packet has already been described in detail with respect to the triggering audio signal, so it is omitted here.

The processor 115 (access authentication program) configures a packet to be output as an audio signal using identification data for access. For example, processor 115 (access authentication program) outputs each logic value of a sequence of logic values in a packet header as a digital audio stream to be represented by a designated frequency.

For example, if the sequence of the packet header is represented by "11111111 ", the designated frequency is 22.05 KHz, the sampling rate is 88.2 KHz, and the presence of the designated frequency is recognized as logic 1, Access authentication program) encodes each logic 1 of the packet header into four pieces of sample data (16 bits). The first sample data and the second sample data are set to values larger than the reference value (the 15th power of 2) as the value of the sample bit 1 (for example, 16s -1 of 2), and the third sample data and the fourth The sample data is set to a value smaller than the reference value (for example, 0). Thus, four sample data can be encoded with a frequency of 22.05 KHz. The set value can be configured to be sufficiently different to be recognized by other devices when outputting with an analog electric signal, and can be set to a maximum value and a minimum value in the range of the sample value, for example.

After configuring the header sequence into sample data, the processor 115 constructs the identification data for accessing the sample data. The configuration of the sample data is performed in the same manner as the configuration of the sample data of the packet header according to the binary code of the access identification data. Thereafter, the processor 115 calculates the error code for the access identification data, the packet header, and the data of the tail field indicating the error code into the sample data through the same process.

Thereafter, the processor 115 (access authentication program) composes the sample data of the header field, the sample data of the identification data for entering and exiting the data field, and the sample data of the tail field into a series of digital audio streams, . The audio CODEC 109 converts a series of sample data of the digital audio stream into an electric signal using the audio DAC, and outputs the electric signal to the speaker 111.

The audio signal outputted in the designated format by encoding the access identification data through the designated frequency is output according to the designated period or the randomly set period (period).

The audio codec 109 may convert the digital audio stream of the sample data configured in the predetermined format into an electric signal and output it through the speaker 111.

The designated frequency used for recognizing the triggering audio signal and the designated frequency for outputting the audio signal may be the same or different.

Through this process in the processor 115, an identifier capable of identifying the user of the portable terminal 100 can be output as an audio signal using the audio codec 109 that is generally activated for telephone conversation, recording, have.

3 is a diagram showing an exemplary flow of outputting identification data for access.

The control flow of FIG. 3 is performed in the portable terminal 100 and preferably in the processor 115 using an access authentication program. Since the main flow and the detailed functions performed in the portable terminal 100 have already been described in detail with reference to FIG. 2, a brief description will be given here.

The portable terminal 100 loads the access authentication program into the processor 115 at a user input or at boot time (S101), and the processor 115 performs an access authentication program to perform the following control flow. The access authentication program can be executed in the background and can be executed during execution of another program.

As the access authentication program is loaded, the portable terminal 100 sets various parameters to be used upon transmission and reception of an audio signal including identification data to the audio codec 109 (S103). For example, the portable terminal 100 sets the audio codec 109 by outputting a sampling rate, an output level, a reception level, and the like as a control signal.

Thereafter, the portable terminal 100 recognizes the triggering audio signal output from the access control device 200 and configured using the designated frequency (S105).

Specifically, the portable terminal 100 receives a series of digital audio streams through the audio ADC of the audio codec 109 and tries to extract packets of a predetermined format from the received digital audio stream. 2, the portable terminal 100 can recognize a triggering audio signal through identification of a packet header, packet data, and a packet tail using a predetermined designated frequency.

If the packet according to the promised packet format is not recognized, the portable terminal 100 continuously tries to recognize the triggering audio signal (S105).

When the triggering audio signal is recognized through the recognition of the packet, the portable terminal 100 extracts the identification data indicating the access control device 200 outputting the triggering audio signal from the packet data (S107). The identification data can be extracted into binary data (binary data composed of logic 1 and 0).

Then, the portable terminal 100 compares the extracted identification data with the identifiers of the one or more access control devices 200 stored in the nonvolatile memory or the like (S109). If there is no matching identifier, the flow of FIG. 3 may be repeated from S105.

According to the result of comparison, an audio signal indicating a passenger entering / exiting through the access control device is output (S111).

Specifically, if there is an identical identifier, the portable terminal 100 stores the identification data for access, which is stored in a nonvolatile memory or the like and can identify whether or not the user of the portable terminal 100 can access the specific door 300 Into the audio signal using the designated frequency and outputs it through the speaker 111 (S111).

The audio signal including the access identification data is outputted repeatedly or randomly a plurality of times according to the setting period during a certain period in which the identifier of the access control device 200 stored is recognized.

The access identification data is encoded using the designated frequency according to the promised format and output to the speaker 111. [ The designated frequency is preferably an audible frequency. The access control device 200 can transmit an identifier that can be used as an auxiliary to the access control device 200 without recognizing or interfering with the user by using the non-audible frequency.

4 is a block diagram of the access control device 200. As shown in FIG.

4, the access control device 200 includes an audio transmitting / receiving unit 201, a living body signal receiving unit 203, an output unit 205, an opening / closing signal output unit 207, a storage unit 209, and a control unit 211 . The block diagram of FIG. 4 preferably shows a functional block diagram and the access control device 200 has hardware corresponding to each functional block. The access control device (200) according to the present invention is configured to be able to quickly control entrance and exit of a user by utilizing a biometric signal. The access control device 200 further utilizes the audio signal for quick access authentication. The audio signal can be supplementarily utilized to define a biological signal. The common contents already shown in FIG. 2 and FIG. 3 will be briefly described below.

Referring to the access control device 200, the audio transceiver 201 includes a microphone and an audio ADC to recognize an audio signal from the outside of the air, and outputs the recognized audio signal as a digital audio stream to the controller 211 .

This audio signal recognizes the triggering audio signal output from the access control device 200 to the portable terminal 100, extracts the identifier of the access control device 200 from the recognized triggering audio signal, And may be a signal for comparing the identifiers of the stored one or more access control devices and outputting the access control device 200 to indicate a passenger who intends to access the device through the access control device 200 according to the comparison result.

The audio transceiver 201 includes a speaker and an audio DAC, converts the digital audio stream received from the controller 211 into an electric signal and a vibration signal, and outputs the audio signal and audio signal as an audio signal. Audio ADCs and audio DACs can configure audio codecs (CODECs).

The audio transceiver 201 is configured to recognize an audio signal from the outside of the air, and the audio signal is transmitted to the portable terminal 100 (100) in response to the triggering audio signal output by the access control device 200, ). ≪ / RTI > This audio signal is a signal encoded through the audio CODEC 109 (specifically audio DAC) of the portable terminal 100 using a designated frequency that is a non-audible frequency. The designated frequency may be a frequency set at, for example, 22 KHz or more and 192 KHz or less, for example, 22.05 KHz, 32 KHz, 44.1 KHz, 48 KHz, 88.2 KHz, 96 KHz,

The audio transceiver 201 can receive control signals from the controller 211 and set various parameters. For example, the audio transmitting / receiving unit 201 may set a sampling rate and set an output level and a receiving level for controlling the output gain and the input gain of the codec of the audio transmitting / receiving unit 201. The sampling rate is configured to be higher than the period of the designated frequency and is set to, for example, at least two times (preferably at least four times).

The living body signal receiving unit 203 recognizes the living body signal provided by the accessing person through the door 300 and displays the recognized living body signal or outputs the corresponding living body data to the control unit 211. [

The bio-signal receiving unit 203 includes a fingerprint recognition module for recognizing the fingerprint of the passer and / or an iris recognition module for recognizing the iris, and outputs the fingerprint data and / or the iris data to the controller 211.

The output unit 205 outputs the state of the access control device 200 under the control of the control unit 211. The output unit 205 includes an LED diode, a buzzer, a speaker, and a warning light, and outputs a specific state under the control of the controller 211 so that the specific state can be known from the outside.

Closing signal output unit 207 outputs an opening / closing control signal outputted by the control unit 211 as opening / closing means of the door 300. The open / close signal output unit 207 is provided with, for example, RS232, RS485, UART, and / or a buffer for signal amplification and outputs signals (lines) output through the respective communication methods to the opening / do.

The storage unit 209 stores volatile memory, nonvolatile memory, SD card, USB memory, and / or hard disk to store various data and programs.

The storage unit 209 stores (as data indicating the accessor item) for identifying the accessor permitted to enter and exit through the access control device 200 as the authorized accessor. Each of the plurality of accessor items includes at least identification data for access and biometric authentication data.

The access identification data is composed of numbers (for example, a decimal number or a binary number), letters, symbols, and combinations thereof for the purpose of identifying a visitor. The access identification data can be represented by a series of binary numbers (bits) and can be stored in the corresponding portable terminal 100 of the corresponding accessor.

The biometric authentication data is data for identifying a user through biometric authentication (fingerprint recognition, iris recognition, or the like), for example, includes data of a plurality of minutiae points for distinguishing from others in fingerprint recognition, And includes data of a plurality of feature points. In fingerprint recognition, access authentication can be performed by comparing data of 100 feature points. In iris recognition, a user can be authenticated by comparing data of more than 200 feature points.

The storage unit 209 stores the authentication program used for the user authentication and the identifier of the access control device 200 for displaying the access control device 200 to the external portable terminal 100. [ The identifier of the access control device 200 can be expressed by a series of binary numbers (bits), which is composed of numbers (decimal or binary, etc.), letters, symbols, and combinations thereof.

The control unit 211 includes one or more execution units capable of executing instructions of a program and controls the access control device 200 through a program. The control unit 211 may be referred to as a processor, an MPU, a CPU, a microcomputer, or the like.

The control unit 211 controls other blocks using various programs stored in the storage unit 209. [ According to the present invention, the control unit 211 authenticates the user using the audio signal and the bio-signal using the authentication program stored in the storage unit 209, To the door (300). The audio signal is supplementarily used to enable quick authentication through the biosignal.

The control unit 211 loads the authentication program of the storage unit 209 and controls the other blocks by driving the authentication program as the power is applied or booted.

As the activation of the authentication program is started, the control unit 211 sets the audio transmitting / receiving unit 201.

Specifically, the control unit 211 transmits a control signal for setting the sampling rate, the output level, and the reception level of the codec of the audio transmitting / receiving unit 201 to the audio transmitting / receiving unit 201 through a control interface (for example, I2C) Output.

The sampling rate (cycle) is set to be at least twice as long as the designated frequency (or four times or more), the output level is set to the size of the audio signal to be output through the speaker of the audio transmitting and receiving unit 201, The size of the audio signal that can be recognized through the microphone of the unit 201 is set. The output level and the reception level can be determined through an audio signal delivery model or experiment such that they can be recognized within a certain distance (e.g., 5 m, 7 m, etc., which may be greater than the distance set in the portable terminal 100) .

After the setting of the audio transmission / reception unit 201, the control unit 211 controls the audio transmission / reception unit 201 to output the triggering audio signal through the audio transmission / reception unit 201. The triggering audio signal is periodically repeatedly output in accordance with a specified period or a variable period.

2, the configuration of the triggering audio signal has been described in detail. Therefore, in brief, the controller 211 configures a packet header, a packet data, and a packet tail according to a predetermined format. The packet data includes an identifier of the access control apparatus 200 stored in the storage unit 209. [

The control unit 211 converts the configured packet into a series of digital audio stream data. In this process, the designated frequency is used and the packet data is encoded in the digital audio stream. The designated frequency may be 1/2, 1/4, or the like of the sampling frequency. If the sampling frequency is twice as large as the designated frequency, the designated frequency can be encoded in a series of two samples of the digital audio stream. If the sampling frequency is four times larger than the designated frequency, the designated frequency can be encoded in a series of four samples of the digital audio stream. The data value of each sample may be set to two values (an arbitrary value larger than the reference value and an arbitrary value smaller than the reference value) based on the reference value.

If four samples are represented by 1100 (for example, logic 1) and represent one designated frequency by the sampling rate, then the two sample data values of the previous samples are greater than the reference value (intermediate value) Maximum value) and the two sample data values of the following samples are set to a value (e.g., a minimum value) smaller than the reference value.

The control unit 211 outputs the converted sample data stream to the audio transceiver 201 and the audio transceiver 201 outputs a triggering audio signal for triggering the other portable terminal 100 through a speaker or the like.

The controller 211 can confirm the triggering audio signal output to the air through the audio transceiver 201. For example, the control unit 211 may convert an electrical signal through a microphone of the audio transceiver 201 and receive the converted signal as a digital audio stream through the audio ADC of the audio transceiver 201.

The control unit 211 can convert the received digital audio stream into a packet of a predetermined format, and can confirm an error by restoring the identifier of the access control device 200 and the error code of the packet tail. If the recognized identifier is the same as the output identifier or if the two error codes are the same, the triggering audio signal can be repeatedly output according to the previously set period. If the identifiers and / or error codes are different, it is possible to change the period or output the triggering audio signal at random intervals. Accordingly, it is possible to reduce or prevent the collision caused by the audio signal.

The controller 211 repeatedly outputs the triggering audio signal, while the controller 211 recognizes the audio signal through the audio transceiver 201 and extracts the identification data for access.

Specifically, the digital audio stream is received through the audio ADC of the audio transmitting / receiving unit 201, the digital audio stream is formed into a packet of a predetermined format using a designated frequency, the packet data is extracted by synchronizing with the header of the packet, And checks whether the packet data is erroneous using the tail. The packet data is the identification data for accessing the portable terminal 100 outputting the audio signal or the packet data. The digital audio stream is received according to a sampling period (rate) at which the designated frequency can be recovered.

As the access identification data is extracted, the control unit 211 determines the biometric authentication data corresponding to the access identification data. For example, the control unit 211 can identify the accessory item including the access identification data extracted from the plurality of accessor items stored in the storage unit 209, and determine the biometric authentication data of the identified accessor item.

The control unit 211 can temporarily store the extracted access identification data and further corresponding biometric authentication data in the storage unit 209 together with the extraction time. The control unit 211 stores the identified biometric authentication data (together with the accessory item or the access identification data) together with the extraction time (this time is set by the control unit 211) in a volatile memory or the like, (For example, a visitor item or access identification data). The queue is constituted by a predetermined number of pieces of biometric authentication data (or an accessory item or access identification data) according to the extraction time in a first-in first-out (FIFO) manner. The controller 211 deletes the oldest biometric authentication data from the queue when the number of queues is equal to or more than a predetermined number so that only a specified number of biometric authentication data is retained in the queue.

The control unit 211 may perform the extraction of the access identification data and the determination of the corresponding authentication data several times before the recognition of the biometric signal. Accordingly, the access identification data can be received from the portable terminals 100 existing near the access control device 200 before the specific biometric signal is recognized, and the biometric data candidates to be used for access authentication can be determined.

Then, the control unit 211 recognizes the biometric signal through the biometric signal receiving unit 203, receives the biometric data corresponding to the recognized biometric signal from the biometric signal receiving unit 203, and extracts the biometric identification data from the biometric data.

The biometric identification data is composed of data indicating the characteristic points set for identification among the biometric data according to the recognition of the fingerprint or the iris.

As the biometric identification data is extracted, the control unit 211 compares the extracted biometric identification data with biometric authentication data determined before recognition of the biometric signal.

For example, the control unit 211 corresponds to the access identification data extracted for a predetermined period of time (for example, 10 seconds, 30 seconds, etc.) before the biometric signal recognition and biometric identification data extraction time, And compares the biometric authentication data temporarily stored in the biometric authentication data with the extracted biometric identification data. These biometric authentication data are stored together with the extraction time, and the control unit 211 can determine the biometric authentication data to be compared within a predetermined time.

Alternatively, the control unit 211 extracts the biometric authentication data temporarily stored in the queue of the storage unit 209 or the like, corresponding to the specified number of access identification data extracted from the biometric signal receiving unit 203 before the recognition time of the biometric signal And compares it with the biometric identification data. The size of the queue is set to a specified number (for example, 10), so that the biometric authentication data within a designated number can be easily compared with the biometric identification data extracted through the biometric signal, and the comparison target can be dramatically reduced.

Alternatively, the control unit 211 may compare the biometric authentication data corresponding to the specified number of access identification data within a predetermined time with the extracted biometric identification data.

The control unit 211 controls the connected door 300 according to the comparison result. Specifically, when the biometric identification data is identical to one of the biometric authentication data to be compared or has a degree of similarity equal to or greater than a predetermined threshold value, the control unit 211 determines that the biometric identification data is an access authentication request of the authorized visitor, And outputs the control signal through the open / close signal output unit 207. [

If they do not match or have a degree of similarity below the threshold value, the control unit 211 can output a signal indicating the denial of access through the output unit 205 or the like to a person who provided the biometric signal.

Through such control performed by the access control device 200, it is possible to accurately authenticate the user through the biometric authentication. In addition, the access control device 200 can further reduce the search range of the biometric authentication by receiving an audio signal of an audible frequency that the user can not hear and further utilizing an identifier in the audio signal. Also, the access control device 200 can use biometrics authentication more quickly by using an audio function that is widely available in the past as an auxiliary.

5 is a diagram showing an exemplary flow of performing access authentication quickly using biometric data. An audio signal is supplementarily utilized in addition to the biological signal for quick access authentication. The audio signal is preferably used for limiting the biometric authentication data to be compared for access authentication.

The control flow of FIG. 5 is performed by the access control device 200 and preferably by the control unit 211 using an authentication program. The main flow and detailed functions of the access control device 200 have been described in detail with reference to FIG.

First, the access control device 200 loads the authentication program of the storage unit 209 and starts driving the authentication program (S201) according to the booting or power supply.

The access control device 200 sets the audio transmitting / receiving unit 201 through the authentication program (S203). For example, the control unit 211 outputs a control signal indicating the setting of the sampling period (rate), the output level, and the reception level of the audio transmitting / receiving unit 201 to the audio transmitting / receiving unit 201.

After the setting of the audio transmitting / receiving unit 201, the access control device 200 composes a promised packet for broadcasting to another portable terminal 100 according to the promised format, and outputs the configured packet as a triggering audio signal (S205 )do. The access control device 200 converts the configured packet according to the designated frequency and constructs sample data according to the sampling rate to output a series of digital audio streams of the composed sample data to the speaker through the audio transmission /

The output of the triggering audio signal (S205) can be performed iteratively and periodically and randomly. Depending on the collision of the audio signal, the setting period may be changed or the random factor may be changed.

The portable terminal 100 recognizing the triggering audio signal can output the audio signal including the access identification data through the internal access authentication program (in response to the triggering audio signal).

The access control device 200 recognizes the audio signal from the outside (from the portable terminal 100) through the audio transmitting / receiving unit 201 and extracts the access identification data from the recognized audio signal (S207). The recognized audio signal is a signal encoded through the audio DAC of the portable terminal 100 using one or a plurality of designated frequencies selected from 22 KHz to 192 KHz in the audible frequency. The access control device 200 can extract the access identification data encoded in the audio signal from the digital audio stream output through the audio ADC of the audio transceiver 201 using the appointed designated frequency.

Then, the access control device 200 determines biometric authentication data corresponding to the extracted access identification data (S209). The access control device 200 can determine the corresponding biometric authentication data using the accessor item or the like of the storage unit 209. [ The determined biometric authentication data is stored in the storage unit 209 together with the extraction time of the access identification data and / or stored in a queue capable of storing the designated number in accordance with the extraction order.

Steps S207 and S209 may be performed several times before the biometric signal is recognized and may be performed several tens or more times before biometric identification. Accordingly, the biometric authentication data within a specific number or within a predetermined time from the present can be determined dynamically.

Then, the access control apparatus 200 recognizes the biometric signal through the biometric signal receiving unit 203 and extracts the biometric identification data from the recognized biometric signal (S211).

As the biometric identification data is extracted, the access control device 200 compares the biometric authentication data corresponding to the access identification data with the biometric identification data (S213).

For example, the access control device 200 compares the biometric authentication data corresponding to the access identification data extracted within the designation time before the recognition of the biometric signal with the biometric identification data, and compares the biometric authentication data with the biometric authentication data Can be determined whether or not the biometric authentication data exists in the biometric authentication data.

Alternatively, the access control device 200 compares the biometric authentication data corresponding to the designated number of the extracted access identification data with the biometric identification data in the past order before the recognition time of the biometric signal, It is possible to determine whether the biometric authentication data exists in the biometric authentication data.

Alternatively, the access control device 200 compares the biometric authentication data corresponding to the extracted access identification data within a specified number of past predetermined time periods before the recognition time of the biometric signal with the biometric identification data, It is possible to judge whether the biometric authentication data having the similarity exists in the biometric authentication data.

The access control apparatus 200 controls the door 300 connected to it in accordance with the comparison result in step S123 (S215). For example, when there is biometric authentication data in the biometric authentication data to be compared, the access control device 200 generates an open / close control signal for opening the associated door 300 when there is biometric authentication data that matches the biometric identification data or has a degree of similarity equal to or greater than the threshold value And outputs it to the opening / closing signal output unit 207.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.

100: portable terminal
101: Communication interface 103: Input interface
105: output interface 107: memory
109: Audio codec 111: Speaker
113: microphone 115: processor
200: Access control device
201: Audio transmission / reception unit 203: Biological signal reception unit
205: output unit 207: opening / closing signal output unit
209: Storage unit 211: Control unit
300: Entrance

Claims (11)

The portable terminal recognizing the triggering audio signal using the designated frequency;
Extracting identification data of the access control device from the triggering audio signal by the portable terminal;
Comparing the extracted identification data with identifiers of one or more access control devices stored in the portable terminal; And
And outputting an audio signal indicating a passenger who intends to access the portable terminal through the access control device according to the comparison result.
Access control method. The method according to claim 1,
Wherein the output step encodes the access identification data stored in the portable terminal into an audio signal using a designated frequency and outputs the access identification data stored in the portable terminal when the extracted identification data coincides with the identifier of the one or more access control devices stored in the portable terminal,
Access control method. 3. The method of claim 2,
Wherein the audio signal encoding the triggering audio signal and the access identification data is a signal encoded through an audio DAC using the same designated frequency of 22 KHz to 192 KHz,
Access control method. The method according to claim 1,
The access control device extracting identification data for access from an audio signal;
The access control device extracting biometric identification data from the biometric signal;
The access control device comparing the biometric authentication data corresponding to the access identification data with the biometric identification data; And
The access control device controlling a door associated with the result of the comparison,
Access control method. 5. The method of claim 4,
Before the biometric identification data is extracted, the access identification data is extracted a plurality of times,
Wherein the step of comparing the biometric authentication data with the biometric identification data comprises the steps of: comparing the biometric authentication data corresponding to the access identification data extracted within the designated time before the recognition of the biometric signal with the biometric identification data;
Access control method. 5. The method of claim 4,
Before the biometric identification data is extracted, the access identification data is extracted a plurality of times,
Wherein the step of comparing the biometric authentication data with the biometric identification data comprises the steps of: comparing the biometric authentication data corresponding to the specified number of access identification data extracted from before the recognition of the biometric signal with the biometric identification data;
Access control method. As an access control device,
An audio transceiver for recognizing an audio signal and outputting the recognized audio signal as a digital audio stream;
A bio-signal receiving unit for recognizing a bio-signal and outputting biometric data representing the recognized bio-signal; And
And a controller for extracting access identification data from the digital audio stream, extracting biometric identification data from the biometric data, and comparing the biometric identification data corresponding to the access identification data with the biometric identification data to control the access door and,
Wherein the audio signal is generated by a portable terminal that recognizes a triggering audio signal outputted by the access control device and extracts an identifier of the access control device from the recognized triggering audio signal and identifies the identifier of one or more access control devices stored in the portable terminal Which is a signal for outputting to indicate a passenger entering or exiting through the access control device in accordance with the comparison result,
Access control device. 8. The method of claim 7,
The control unit controls the audio transceiver to periodically output a triggering audio signal through the audio transceiver,
The audio signal recognized and output through the audio transceiver is a signal encoded through an audio DAC using the same designated frequency of 22 kHz or more and 192 kHz or less,
Wherein the control unit controls the audio transmitting / receiving unit to receive the digital audio stream according to a sampling period in which the designated frequency can be recovered and extract the access identification data encoded in the audio signal,
Access control device. 8. The method of claim 7,
And a storage unit for storing a plurality of pieces of biometric authentication data corresponding to the passengers who are allowed to enter and leave
The control unit controls biometric identification data stored in the storage unit and biometric identification data corresponding to the access identification data extracted within the designation time before the recognition of the biometric signal through the biometric signal receiver, Or biometric identification data stored in the storage unit and corresponding to the specified number of access identification data extracted from before the recognition of the biometric signal through the biometric signal receiver, doing,
Access control device. An access control system comprising the access control device of claim 7. 11. The method of claim 10,
Further comprising: a plurality of portable terminals capable of outputting an audio signal to the access control device,
The portable terminal recognizes a triggering audio signal encoded at a designated frequency, which is a non-audible frequency, and encodes the access identification data of a user carrying the portable terminal at a designated frequency, which is a non-audible frequency,
Access control system.

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