KR20200138926A - Electronic terminal apparatus capable of judging whether or not number of steps is normally measured by using complex sensor and operating method thereof - Google Patents

Abstract

Disclosed are an electronic terminal device capable of determining whether the number of steps is normally measured using a composite sensor, and a method of operating the same. The present invention may prevent the number of steps of a user from being measured by an illegal method by calculating the speed change amount, the illuminance change amount, and the volume change amount through an acceleration sensor, illuminance sensor, and volume sensor, determining whether the number of steps of the user is abnormally measured in an electronic terminal device based on the speed change amount, the illuminance change amount, and the volume change amount, and when it is determined that the number of steps of the user is abnormally measured, controlling the electronic terminal device so as not to measure the number of steps of the user during a predetermined waiting time.

Description

Electronic terminal device capable of determining whether or not the number of steps is normally measured using a composite sensor, and its operation method {ELECTRONIC TERMINAL APPARATUS CAPABLE OF JUDGING WHETHER OR NOT NUMBER OF STEPS IS NORMALLY MEASURED BY USING COMPLEX SENSOR AND OPERATING METHOD THEREOF}

The present invention relates to an electronic terminal device capable of determining whether or not the number of steps is normally measured using a composite sensor, and a method of operating the same.

Recently, with the spread of a war label culture that values work-life balance, the number of people exercising after work is increasing.

Among them, not only those who exercise using bicycles on the way home from work, but also those who jog or walk after setting the distance between the two points are not few.

In this way, after setting the distance between the two points, a device that can provide information on calorie consumption or number of steps for people jogging or walking has become necessary, and this device is called'pedometer'.

In the existing pedometer, the number of steps of a user was measured using a single sensor such as a gyro sensor that uses the value of the angular velocity, which is the rotational speed of a moving object, and an acceleration sensor that uses the value of the velocity of a moving object.

On the other hand, with the development of mobile technology, the recent pedometer is installed and released in the application, and after measuring the number of steps of the user through mobile, a predetermined point is paid in response to the measured number of steps of the user. Became possible.

However, in relation to the payment of a predetermined point as a reward in response to the measured number of steps of the user, a problem has been raised that after allowing the user to measure the number of steps in a fraudulent manner, the point may be illegally received.

Therefore, in order to solve this problem, there is a need for a study on a technique capable of determining whether the number of steps of a user is measured by an illegal method using a composite sensor including an acceleration sensor, an illuminance sensor, and a volume sensor.

The electronic terminal device and its operation method according to the present invention calculate the speed change amount, the illuminance change amount, and the volume change amount through an acceleration sensor, an illuminance sensor, and a volume sensor, and then, based on the speed change amount, the illuminance change amount, and the volume change amount, After determining whether the number of steps of the user is abnormally measured in the terminal device, if it is determined that the number of steps of the user is abnormally measured, the electronic terminal does not measure the number of steps of the user during a predetermined waiting time. By controlling the device, it is possible to prevent the user's step count from being measured in an illegal way.

An electronic terminal device capable of determining whether or not the number of steps is normally measured using a composite sensor according to an embodiment of the present invention acquires information on acceleration according to the movement of the user through the acceleration sensor, Based on the information on the acceleration, n (n is a natural number of 2 or more) speed changes-The speed change is the change in speed measured at a predetermined unit time interval-A speed change calculation unit and an illuminance sensor are used. By acquiring information on the intensity of ambient light according to the movement of the user through the user's movement, n luminance changes based on information on the intensity of ambient light according to the movement of the user-The luminance change is measured at the preset unit time interval Based on the information on the amount of ambient sound according to the user's movement by acquiring information on the amount of ambient sound according to the user's movement through the luminance change amount calculation unit that calculates- A volume change amount calculation unit that calculates n volume change amounts-the volume change amount is a change amount of the volume measured at the preset unit time interval -, the calculated n speed changes, the calculated n illuminance changes, and the calculated A matrix generator that generates an nx 3 matrix by allocating n volume changes as components of each matrix column, and a weight calculation matrix of nx 1 by multiplying the nx 3 matrix by a predetermined weight matrix of 3 x 1 And a feature vector generator that generates an n-dimensional feature vector including values constituting the nx 1 weighting matrix as each component, and when the n-dimensional feature vector is generated, the n-dimensional feature vector And a vector similarity calculation unit that calculates a vector similarity between a preset n-dimensional reference vector for indicating that the number of steps of the user is abnormally measured, and compares the vector similarity with a preset threshold, and the vector similarity is If it is confirmed that the threshold is exceeded, the number of steps of the user If it is determined that it is being measured abnormally and the vector similarity is determined to be less than or equal to the threshold value, the user's step count determination unit determines that the user's step count is being measured normally and the step count determination unit When it is determined that the number of steps is abnormally measured, a control unit for controlling the electronic terminal device so as not to measure the number of steps of the user during a preset waiting time.

In addition, the method of operating an electronic terminal device capable of determining whether or not the number of steps is normally measured using a composite sensor according to an embodiment of the present invention is to obtain information on acceleration according to the user's movement through the acceleration sensor, Calculating n (n is a natural number of 2 or more) speed changes based on the information on the acceleration according to the user's movement-the speed change is the change in speed measured at a preset unit time interval-through an illuminance sensor By acquiring information on the intensity of ambient light according to the movement of the user, n number of changes in illumination based on the information on the intensity of ambient light according to the movement of the user-The amount of change in illumination is measured at the preset unit time interval Calculating the amount of change in illuminance-is obtained, through a volume sensor, information on the amount of ambient sound according to the user's movement, and n volume changes based on information on the amount of ambient sound according to the user's movement -The volume change amount is a change amount of the volume measured at the predetermined unit time interval-calculating, the calculated n speed changes, the calculated n illuminance changes, and the calculated n volume changes, respectively, in a matrix Generating a matrix of nx 3 by assigning it as a component constituting a column of, generating a weighting matrix of nx 1 by multiplying the matrix of nx 3 by a weight matrix of 3 x 1, and the weight of nx 1 Generating an n-dimensional feature vector including values constituting an operation matrix as each component, and when the n-dimensional feature vector is generated, the n-dimensional feature vector and the number of steps of the user are abnormally measured Calculating a vector similarity between n-dimensional reference vectors set in advance to indicate that is, when the vector similarity is determined to exceed the threshold value by comparing the vector similarity with a preset threshold value, the user's step It is determined that the number is abnormally measured, and the vector similarity is less than the threshold value. When it is determined that the number of steps of the user is determined to be normal, and if it is determined that the number of steps of the user is abnormally measured, the electronic terminal so as not to measure the number of steps of the user during a preset waiting time. Controlling the device.

The electronic terminal device and its operation method according to the present invention calculate the speed change amount, the illuminance change amount, and the volume change amount through an acceleration sensor, an illuminance sensor, and a volume sensor, and then, based on the speed change amount, the illuminance change amount, and the volume change amount, After determining whether the number of steps of the user is abnormally measured by the terminal device, when it is determined that the number of steps of the user is abnormally measured, the electronic terminal does not measure the number of steps of the user during a predetermined waiting time. By controlling the device, it is possible to prevent the user's step count from being measured in an illegal manner.

1 is a diagram illustrating a structure of an electronic terminal device capable of determining whether or not a number of steps is normally measured using a composite sensor according to an embodiment of the present invention.
2 is a flowchart illustrating a method of operating an electronic terminal device capable of determining whether or not to measure the number of steps normally using a composite sensor according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. This description is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. While describing each drawing, similar reference numerals have been used for similar components, and unless otherwise defined, all terms used in the present specification including technical or scientific terms refer to common knowledge in the technical field to which the present invention belongs. It has the same meaning as commonly understood by someone who has it.

In this document, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated. In addition, in various embodiments of the present invention, each component, functional blocks or means may be composed of one or more sub-components, and the electrical, electronic, and mechanical functions performed by each component are electronic. A circuit, an integrated circuit, and an application specific integrated circuit (ASIC) may be implemented with various known devices or mechanical elements, and may be implemented separately or two or more may be integrated into one.

On the other hand, the blocks of the attached block diagram and the steps in the flowchart are computer program instructions that are mounted on a processor or memory of equipment capable of processing data such as a general-purpose computer, a special-purpose computer, a portable notebook computer, and a network computer to perform specified functions. It can be interpreted as meaning. Since these computer program instructions can be stored in a memory provided in a computer device or in a memory readable by a computer, the functions described in the blocks in the block diagram or in the steps in the flowchart are produced as a product containing the instruction means to perform this. It could be. In addition, each block or each step may represent a module, segment, or part of code including one or more executable instructions for executing the specified logical function(s). In addition, it should be noted that in some alternative embodiments, functions mentioned in blocks or steps may be executed in a different order. For example, two blocks or steps shown in succession may be performed substantially simultaneously or may be performed in reverse order, and in some cases, some blocks or steps may be omitted.

1 is a diagram illustrating a structure of an electronic terminal device capable of determining whether or not a number of steps is normally measured using a composite sensor according to an embodiment of the present invention.

Referring to FIG. 1, an electronic terminal device 110 capable of determining whether or not the number of steps is normally measured using the composite sensor according to the present invention includes a speed change amount calculation unit 111, an illuminance change amount calculation unit 112, and a volume It includes a variation calculation unit 113, a matrix generation unit 114, a characteristic vector generation unit 115, a vector similarity calculation unit 116, a step count determination unit 117, and a control unit 118.

First, in the present invention, the electronic terminal device 110 may provide a pedometer function for measuring the number of steps of a user.

In particular, after measuring the number of steps of the user using a gyro sensor or the like, the electronic terminal device 110 may provide a function of paying a predetermined point as a reward in response to the measured number of steps of the user.

Under this situation, the speed change amount calculation unit 111 acquires information on acceleration according to the user's movement through the acceleration sensor, and based on the information on the acceleration according to the user's movement, n (n is a natural number of 2 or more) Calculate the amount of change in speed.

Here, the speed change amount means a change amount of speed measured at a predetermined unit time interval.

For example, when'n=5' and the preset unit time interval is '1 second', the speed change amount calculation unit 111 acquires information on acceleration according to the movement of the user through the acceleration sensor. Accordingly, the speed change amount '1.0, 1.5, 0.7, 1.2, 1.3' may be calculated according to the calculation of Equation 1 below based on the information on the acceleration according to the user's movement.

는 t시점과 t-1시점에서의 속도의 크기 변화량으로 V_t-V_t-1을 의미한다.Here, the time interval between time t and time t-1 is '1 second', V _t is the magnitude of the speed at time t,

Is the amount of change in the magnitude of the velocity at the time t and _t-1, which means V _t -V _t-1 .

The illumination variation calculation unit 112 obtains information on the intensity of ambient light according to the movement of the user through an illumination sensor, and calculates n illumination variations based on information on the intensity of ambient light according to the movement of the user. do.

Here, the amount of change in illuminance means the amount of change in illuminance measured at the predetermined unit time interval.

For example, when'n=5' and the preset unit time interval is '1 second', the illuminance change amount calculation unit 112 uses the illuminance sensor to determine the intensity of ambient light according to the movement of the user. Based on the information on the intensity of ambient light according to the movement of the user by acquiring the information, the amount of change in illumination '1.4, 1.7, 0.9, 0.8, 1.1' may be calculated according to the calculation of Equation 2 below.

는 t시점과 t-1시점에서의 주변 빛의 세기 변화량으로 L_t-L_t-1을 의미한다.Here, the time interval between time t and time t-1 is '1 second', L _t is the intensity of ambient light at time t,

Denotes L _t -L _t-1 as the amount of change in the intensity of ambient light at the time t and t-1.

The volume change amount calculation unit 113 obtains information on the volume of surrounding sounds according to the movement of the user through a volume sensor, and calculates n volume changes based on information on the volume of surrounding sounds according to the movement of the user. do.

Here, the volume change amount means the volume change amount measured at the preset unit time interval.

For example, if'n=5' and the preset unit time interval is '1 second', the volume change amount calculation unit 113 uses the volume sensor to determine the size of the surrounding sound according to the movement of the user. The volume change amount '1.6, 0.5, 0.6, 0.3, 1.0' may be calculated according to the calculation of Equation 3 below based on the information on the volume of the surrounding sound according to the user's movement by acquiring the information.

는 t시점과 t-1시점에서의 주변 소리의 크기 변화량으로 S_t-S_t-1을 의미한다.Here, the time interval between time t and time t-1 is '1 second', S _t is the volume of the surrounding sound at time t,

Is the amount of change in the loudness of the surrounding sound at the time t and _t-1, which means S _t -S _t-1 .

The matrix generator 114 generates a matrix of n x 3 by allocating the calculated n speed changes, the calculated n illuminance changes, and the calculated n volume changes as components constituting the columns of the matrix.

For example, the matrix generator 114 includes the calculated speed change amount '1.0, 1.5, 0.7, 1.2, 1.3', the calculated illuminance change amount '1.4, 1.7, 0.9, 0.8, 1.1', as shown in Equation 4 below, and A 5 x 3 matrix may be generated by assigning the calculated volume change amounts '1.6, 0.5, 0.6, 0.3, and 1.0' as components constituting the columns of the matrix, respectively.

The feature vector generator 115 generates a weight calculation matrix of nx 1 by multiplying the matrix of nx 3 by a weight matrix of 3 x 1, and values constituting the weight calculation matrix of nx 1 are used as each component. Generate an n-dimensional feature vector containing.

In this case, according to an embodiment of the present invention, the weight matrix may include three predetermined weights composed of values greater than 0 and less than 1 as components, and the sum of the three weights may be a matrix.

For example, the feature vector generator 115 may generate a weight calculation matrix of 5 x 1 by multiplying the 5 x 3 matrix by a predetermined weight matrix of 3 x 1 as shown in Equation 5 below.

In addition, the feature vector generation unit 115 is a five-dimensional component including values constituting the 5 x 1 weight calculation matrix generated by multiplying the 5 x 3 matrix by the 3 x 1 weight matrix. The feature vector of'(1.24, 1.36, 0.74, 0.9, 1.18)' can be generated.

When the n-dimensional characteristic vector is generated, the vector similarity calculating unit 116 is a vector similarity between the n-dimensional characteristic vector and a preset n-dimensional reference vector for indicating that the number of steps of the user is abnormally measured. Computes

Here, the vector similarity between the n-dimensional feature vector and the n-dimensional reference vector may be calculated according to Equation 6 below.

Here, M is the vector similarity between the two vectors, S is the cosine similarity between the two vectors, D is the Euclidean distance between the two vectors, and the cosine similarity S and the two vectors between the two vectors The Euclidean distance D between may be calculated according to Equation 7 below and Equation 8 below.

Here, S is the cosine similarity between vectors A and B and has a value between -1 and 1, and the larger the value is, the more similar the vector is, A _i is the i-th component of vector A, and B _i is the _i of vector B Means the second ingredient.

In Equation 8, D denotes a Euclidean distance, and A _i and B _i denote the i-th components included in the two vectors. Generally, as the Euclidean distance between two vectors is smaller, the two vectors can be regarded as similar vectors, and as the Euclidean distance between two vectors is larger, the two vectors can be considered to be dissimilar vectors.

For example, suppose that'n=5' and the 5-dimensional reference vector is'(1.3, 2.1, 0.6, 1.0, 1.2)'. Calculation of cosine similarity S and Euclidean distance D between the 5-dimensional feature vector'(1.24, 1.36, 0.74, 0.9, 1.18)' and the 5-dimensional reference vector'(1.3, 2.1, 0.6, 1.0, 1.2)' May be performed in Equation 7 and Equation 8 above.

At this time, based on the cosine similarity (S) '0.9779' performed in Equation 7 and the Euclidean distance (D) '0.7623' performed in Equation 8, in Equation 6, the vector similarity (M) ' 2.2897' can be derived.

The step count measurement determination unit 117 compares the vector similarity with a preset threshold value, and when it is determined that the vector similarity exceeds the threshold value, determines that the user's step count is abnormally measured, and the When it is determined that the vector similarity is less than the threshold value, it is determined that the number of steps of the user is being measured normally.

When it is determined by the step count determination unit 117 that the number of steps of the user is abnormally measured, the controller 118 sets the electronic terminal device 110 to not measure the number of steps of the user during a preset waiting time. Control.

For example, when the preset threshold is set to '2', the vector similarity is set to '2.2897', and the preset waiting time is set to '10 minutes', the step count determination unit 117 may determine the vector similarity. It is determined that the number of steps of the user is abnormally measured by comparing '2.2897' with the preset threshold '2' and confirming that the vector similarity '2.2897' exceeds the threshold '2'. can do.

In this way, when it is determined that the number of steps of the user is abnormally measured by the step count determination unit 117, the control unit 118 does not measure the number of steps of the user during the preset waiting time of '10 minutes'. It is possible to control the electronic terminal device 110 so that it is not.

That is, the electronic terminal device 110 obtains information on the acceleration according to the movement of the user through the acceleration sensor, calculates n speed changes based on the information on the acceleration according to the movement of the user, and uses the illuminance sensor. By obtaining information on the intensity of ambient light according to the user's movement, n number of changes in illumination are calculated based on the information on the intensity of ambient light according to the movement of the user, and according to the movement of the user through a volume sensor. After obtaining information on the amount of ambient sound and calculating n volume changes based on the information on the volume of ambient sound according to the user's movement, the calculated n speed changes and the calculated n illuminance changes And assigning the calculated n volume changes as a component of each matrix column to generate an nx 3 matrix, and multiplying the nx 3 matrix by a predetermined 3 x 1 weight matrix to calculate a weight of nx 1 After generating the matrix, an n-dimensional feature vector including values constituting the nx 1 weighting matrix is generated as each component, indicating that the n-dimensional feature vector and the number of steps of the user are abnormally measured. When it is determined that the vector similarity is greater than the threshold value by calculating the vector similarity between the n-dimensional reference vectors set in advance for indicating, and comparing the vector similarity with a preset threshold value, the number of steps of the user is abnormal. After determining that the number of steps is being measured, by controlling the electronic terminal device 110 not to measure the number of steps of the user during a preset waiting time, it is possible to prevent the number of steps of the user from being measured by an illegal method.

According to an embodiment of the present invention, the control unit 118 may include a notification sound output unit 119.

When it is determined by the step count determination unit 117 that the number of steps of the user is abnormally measured, the notification sound output unit 119 is a notification indicating that the number of steps of the user is abnormally measured during a preset notification time. Sound can be output.

For example, assume that the preset notification time is '15 seconds'. When it is determined by the step count determination unit 117 that the number of steps of the user is abnormally measured, the notification sound output unit 119 displays the number of steps of the user abnormally during the preset notification time of '15 seconds'. The notification sound indicating that it is being measured may be output.

In addition, according to an embodiment of the present invention, the electronic terminal device 110 may further include a threshold value adjustment unit 120.

The threshold value adjustment unit 120 increases the threshold value by a preset ratio when it is determined that the cumulative number of determinations determined that the number of steps of the user is being measured normally exceeds a preset reference number during a preset measurement period. I can.

For example, the preset measurement period is referred to as '10 minutes', the accumulated determination number is referred to as '5 times', the preset reference number is referred to as '3 times', and the threshold is referred to as '2', Assume that the preset ratio is '30%'. During the preset measurement period of '10 minutes', the threshold value adjustment unit 120 determines the cumulative determination number '5' as determined that the number of steps of the user is being normally measured is the preset reference number '3'. By confirming that it is exceeded, the threshold value '2' may be increased by the preset ratio of '30%'.

That is, when it is determined that the user is measuring the number of steps in a normal way at a predetermined measurement period, the threshold value adjustment unit 120 sets the threshold value, which is a reference value for determining whether the user's steps are abnormally measured. By increasing by the ratio of, a predetermined profit can be given to a user who is normally measuring the number of steps.

2 is a flowchart illustrating a method of operating an electronic terminal device capable of determining whether or not to measure the number of steps normally using a composite sensor according to an embodiment of the present invention.

In step S210, information on the acceleration according to the user's movement is obtained through the acceleration sensor, and n (n is a natural number of 2 or more) speed changes based on the information on the acceleration according to the user's movement (the speed change amount is Calculates the amount of change in speed measured at a preset unit time interval).

In step S220, information on the intensity of ambient light according to the user's movement is obtained through an illuminance sensor, and n luminance changes based on information on the intensity of ambient light according to the movement of the user (the luminance change is The amount of change in illuminance measured at the predetermined unit time interval) is calculated.

In step S230, n volume changes (the volume change amount is the amount of change in the volume) based on information on the volume of surrounding sound according to the movement of the user by obtaining information on the volume of the surrounding sound according to the movement of the user through the volume sensor. The amount of change in the volume measured at the preset unit time interval) is calculated.

In step S240, an n x 3 matrix is generated by allocating the calculated n speed changes, the calculated n illuminance changes, and the calculated n volume changes as components constituting the columns of the matrix.

In step S250, the nx 3 matrix is multiplied by a predetermined weight matrix of 3 x 1 to generate an nx 1 weighting matrix, and n including values constituting the nx 1 weighting matrix as each component Create a dimensional feature vector.

In step S260, when the n-dimensional characteristic vector is generated, a vector similarity between the n-dimensional characteristic vector and a preset n-dimensional reference vector to indicate that the number of steps of the user is abnormally measured is calculated. do.

In step S270, the vector similarity and a preset threshold are compared, and if the vector similarity is determined to exceed the threshold, it is determined that the number of steps of the user is abnormally measured, and the vector similarity is If it is confirmed that the number of steps is less than the threshold, it is determined that the number of steps of the user is being measured normally.

In step S280, if it is determined that the number of steps of the user is abnormally measured, the electronic terminal device is controlled so as not to measure the number of steps of the user during a preset waiting time.

In this case, according to an embodiment of the present invention, the weight matrix may include three predetermined weights composed of values greater than 0 and less than 1 as components, and the sum of the three weights may be a matrix.

In addition, according to an embodiment of the present invention, the calculation of the vector similarity between the n-dimensional feature vector and the n-dimensional reference vector may be performed according to Equation (6).

Further, according to an embodiment of the present invention, in step S280, if it is determined that the number of steps of the user is abnormally measured, a notification sound indicating that the number of steps of the user is abnormally measured during a preset notification time It may include the step of outputting.

In addition, according to an embodiment of the present invention, the operation method of the electronic terminal device confirms that during a preset measurement period, the cumulative number of determinations determined that the number of steps of the user is being measured normally exceeds a preset reference number. If so, the step of increasing the threshold value by a predetermined ratio may further include.

In the above, with reference to FIG. 2, a method of operating an electronic terminal device capable of determining whether or not to measure the number of steps normally has been described using a composite sensor according to an embodiment of the present invention. Here, the operation method of the electronic terminal device capable of determining whether or not the number of steps is normally measured using the composite sensor according to an embodiment of the present invention is a normal measurement of the number of steps using the composite sensor described with reference to FIG. Since it may correspond to the configuration of the operation of the electronic terminal device 110 capable of determining whether or not, a more detailed description thereof will be omitted.

An operation method of an electronic terminal device capable of determining whether or not the number of steps is normally measured using a composite sensor according to an embodiment of the present invention may be implemented as a computer program stored in a storage medium for execution through combination with a computer. have.

In addition, the operation method of the electronic terminal device capable of determining whether or not the number of steps is normally measured using the composite sensor according to an embodiment of the present invention is implemented in the form of program commands that can be executed through various computer means, and is read by a computer. It can be recorded on any media. The computer-readable medium may include program instructions, data files, data structures, and the like alone or in combination. The program instructions recorded in the medium may be specially designed and configured for the present invention, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -A hardware device specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of the program instructions include not only machine language codes such as those produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like.

As described above, in the present invention, specific matters such as specific components, etc., and limited embodiments and drawings have been described, but this is provided only to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , If a person of ordinary skill in the field to which the present invention belongs, various modifications and variations are possible from these descriptions.

Therefore, the spirit of the present invention is limited to the described embodiments and should not be defined, and all things that are equivalent or equivalent to the claims as well as the claims to be described later fall within the scope of the spirit of the present invention. .

110: An electronic terminal device capable of determining whether or not to measure the number of steps normally using a composite sensor
111: speed change amount calculation unit 112: illuminance change amount calculation unit
113: volume change amount calculation unit 114: matrix generation unit
115: feature vector generation unit 116: vector similarity calculation unit
117: step count determination unit 118: control unit
119: notification sound output unit 120: threshold value adjustment unit

Claims (12)

In an electronic terminal device capable of determining whether or not to measure the number of steps normally using a composite sensor,
By acquiring information on acceleration according to the user's movement through the acceleration sensor, n (n is a natural number of 2 or more) speed changes based on the information on the acceleration according to the user's movement-The speed change amount is preset (predetermined) A speed change amount calculating unit that calculates-which is the change amount of speed measured at unit time intervals;
By acquiring information on the intensity of ambient light according to the user's movement through an illuminance sensor, n luminance changes based on the information on the ambient light intensity according to the user's movement-The luminance change amount is the preset unit time An illuminance change amount calculation unit that calculates-which is the amount of change in illuminance measured at intervals;
N volume changes based on information on the volume of surrounding sounds according to the movement of the user by acquiring information on the volume of the surrounding sound according to the movement of the user through the volume sensor-the volume change amount is the preset unit time A volume change amount calculating unit that calculates-which is the amount of change in volume measured at intervals;
A matrix generator configured to generate an nx 3 matrix by allocating the calculated n speed changes, the calculated n illumination changes, and the calculated n volume changes as components constituting the columns of the matrix;
A weighting matrix of nx 1 is generated by multiplying the matrix of nx 3 by a weight matrix of 3 x 1, and an n-dimensional feature vector including values constituting the nx 1 weighting matrix as each component is obtained. A feature vector generator that generates;
A vector similarity calculating unit for calculating a vector similarity between the n-dimensional characteristic vector and a preset n-dimensional reference vector for indicating that the number of steps of the user is abnormally measured when the n-dimensional characteristic vector is generated;
When the vector similarity is compared with a preset threshold value and it is determined that the vector similarity exceeds the threshold value, it is determined that the number of steps of the user is abnormally measured, and the vector similarity is determined to be less than the threshold value. A step count determination unit that determines that the number of steps of the user is being measured normally; And
If it is determined by the step count determination unit that the number of steps of the user is abnormally measured, a control unit that controls the electronic terminal device so as not to measure the number of steps of the user during a preset waiting time
An electronic terminal device capable of determining whether or not the number of steps is normally measured using a composite sensor comprising a. The method of claim 1,
The weight matrix is
An electronic terminal device capable of determining whether or not to measure the number of steps normally by using a composite sensor comprising three predetermined weights consisting of values greater than 0 and less than 1 as a component, and the sum of the three weights is a matrix. The method of claim 1,
The electronic terminal device capable of determining whether or not the number of steps is normally measured by using a complex sensor performed according to Equation 1 below in calculating the vector similarity between the n-dimensional characteristic vector and the n-dimensional reference vector.
[Equation 1]

Here, M is the vector similarity between two vectors, S is the cosine similarity between the two vectors, and D is the Euclidean distance between the two vectors. The method of claim 1,
The control unit
When it is determined by the step count determination unit that the number of steps of the user is abnormally measured, a notification sound output unit that outputs a notification sound indicating that the number of steps of the user is abnormally measured during a preset notification time
An electronic terminal device capable of determining whether or not the number of steps is normally measured using a composite sensor comprising a. The method of claim 1,
During a preset measurement period, when it is determined that the number of cumulative determinations determined that the number of steps of the user is being measured normally exceeds a preset reference number, a threshold value adjustment unit that increases the threshold value by a preset ratio
An electronic terminal device capable of determining whether or not the number of steps is normally measured using a composite sensor further comprising a. In the operating method of an electronic terminal device capable of determining whether or not to measure the number of steps normally using a composite sensor,
By acquiring information on acceleration according to the user's movement through the acceleration sensor, n (n is a natural number of 2 or more) speed changes based on the information on the acceleration according to the user's movement-The speed change amount is preset (predetermined) Calculating-which is the amount of change in speed measured at unit time intervals;
By acquiring information on the intensity of ambient light according to the user's movement through an illuminance sensor, n luminance changes based on the information on the ambient light intensity according to the user's movement-The luminance change amount is the preset unit time Calculating-which is the amount of change in illuminance measured at intervals;
N volume changes based on information on the volume of surrounding sounds according to the movement of the user by acquiring information on the volume of the surrounding sound according to the movement of the user through the volume sensor-the volume change amount is the preset unit time Calculating-which is a change in volume measured at intervals;
Generating a matrix of nx 3 by allocating the calculated n speed changes, the calculated n illuminance changes, and the calculated n volume changes as components constituting the columns of the matrix;
A weighting matrix of nx 1 is generated by multiplying the matrix of nx 3 by a weight matrix of 3 x 1, and an n-dimensional feature vector including values constituting the nx 1 weighting matrix as each component is obtained. Generating;
When the n-dimensional feature vector is generated, calculating a vector similarity between the n-dimensional feature vector and a preset n-dimensional reference vector for indicating that the number of steps of the user is abnormally measured;
When the vector similarity is compared with a preset threshold value and it is determined that the vector similarity exceeds the threshold value, it is determined that the number of steps of the user is abnormally measured, and the vector similarity is determined to be less than the threshold value. If so, determining that the number of steps of the user is being measured normally; And
If it is determined that the number of steps of the user is abnormally measured, controlling the electronic terminal device so as not to measure the number of steps of the user during a preset waiting time
Operating method of an electronic terminal device capable of determining whether or not the number of steps is normally measured using a composite sensor comprising a. The method of claim 6,
The weight matrix is
It includes as a component three predetermined weights consisting of values greater than 0 and less than 1, and the sum of the three weights is an electronic terminal device capable of determining whether or not the number of steps is normally measured using a complex sensor that is a matrix of one. How it works. The method of claim 6,
The operation of the electronic terminal device capable of determining whether or not the number of steps is normally measured by using a complex sensor performed according to Equation 1 below to calculate the vector similarity between the n-dimensional characteristic vector and the n-dimensional reference vector. Way.
[Equation 1]

Here, M is the vector similarity between two vectors, S is the cosine similarity between the two vectors, and D is the Euclidean distance between the two vectors. The method of claim 6,
Controlling the electronic terminal device
If it is determined that the number of steps of the user is abnormally measured, outputting a notification sound indicating that the number of steps of the user is abnormally measured during a preset notification time
An operation method of an electronic terminal device capable of determining whether or not the number of steps is normally measured using a composite sensor comprising a. The method of claim 6,
During a preset measurement period, when it is determined that the number of cumulative determinations determined that the number of steps of the user is being measured normally exceeds a preset reference number, increasing the threshold value by a preset ratio
A method of operating an electronic terminal device capable of determining whether or not the number of steps is normally measured using a composite sensor further comprising a. A computer-readable recording medium recording a computer program for executing the method of any one of claims 6 to 10 through combination with a computer. A computer program stored in a storage medium for executing the method of any one of claims 6 to 10 through combination with a computer.

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