KR20060089127A - Apparatus for generating radio frequency having a function of veryfing location and method for generating location information - Google Patents

Abstract

Disclosed are a radio wave generating apparatus having a positioning function and a positioning information generating method. The inertial navigation unit measures the movement distance and outputs a control signal for notifying the movement distance exceeded when the movement distance exceeds a predetermined allowable distance. The communication unit transmits the device identification information, and when a control signal for notifying the movement distance exceeded is input from the inertial navigation unit, the communication unit stops the transmission operation of the device identification information or transmits information indicating service restriction together with the device identification information. The power supply unit provides the external power supplied from the outside to the communication unit, and when the supply of the external power is stopped, the internal power supply is provided to the inertial navigation unit. According to the present invention, it is possible to check whether the radio wave generator is moved and provide a selective service according to the location.

Description

Apparatus for generating radio frequency having a function of veryfing location and method for generating location information}

1 is a block diagram showing a detailed configuration of a radio wave generating apparatus having a positioning function according to the present invention;

2 is a block diagram showing a detailed configuration of an inertial navigation unit, and

3 is a flowchart illustrating a process of generating location information according to the present invention.

The present invention relates to a radio wave transmitting apparatus having a positioning function and a positioning information generating method, and more particularly, to a radio wave transmitting apparatus and a positioning information generating method capable of grasping a moving situation using an inertial navigation apparatus. will be.

A radio wave generator is a device that enters a certain communication area and broadcasts radio waves of a specific frequency. Representative examples of radio wave generating apparatuses include beacons installed on a road to transmit their own identification information, and access points that are end devices of wireless LANs. These devices communicate wirelessly with a terminal device entering its own communication area, and for this purpose, protocols required between the radio wave generating device and the terminal device are separately defined. Wireless communication methods applicable to the radio wave generating apparatus include Bluetooth, W-LAN, Zigbee, and the like.

Such radio wave generating apparatuses perform functions such as control of the terminal device and provision of network services to the terminal device through wireless communication with the terminal device entering the communication area. However, existing radio wave generators are basically fixed at a specific place, and there is no case where a function for determining whether to provide a service is proposed or implemented according to the change of its location.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a radio wave generating apparatus having a positioning function for selectively providing a service according to a position, and a method for generating positioning information.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a computer-readable recording medium for causing a computer to execute a method for generating location information for selectively providing a service according to a location.

In order to achieve the above technical problem, the radio wave generating device with a positioning function according to the present invention, by measuring the moving distance outputs a control signal for notifying the moving distance exceeded if the moving distance exceeds a predetermined allowable distance; Inertial navigation unit; Communication unit for transmitting the device identification information, and stops the transmission operation of the device identification information or transmits the information indicating the service restriction with the device identification information when the control signal for notifying the moving distance exceeded from the inertial navigation unit ; And a power supply unit providing external power supplied from the outside to the communication unit, and supplying internal power mounted therein to the inertial navigation unit when supply of the external power is stopped.

According to an aspect of the present invention, there is provided a method for generating positioning information, comprising: transmitting device identification information; Measuring a moving distance; Outputting a control signal notifying a movement distance exceeded when the measured movement distance exceeds a predetermined allowable movement distance; And stopping the transmission operation of the device identification information or transmitting information indicating service restriction together with the device identification information when a control signal for notifying the movement distance exceeded is input.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to a radio wave generating device having a positioning function and a method for generating position information according to the present invention.

1 is a block diagram showing a detailed configuration of a radio wave generating apparatus having a positioning function according to the present invention.

Referring to FIG. 1, the radio wave generating apparatus 100 having a positioning function according to the present invention includes an inertial navigation unit 110, a communication unit 120, and a power supply unit 130.

The inertial navigation unit 110 detects the movement of the radio wave generator 100 by using an inertial sensor, and transmits the moving distance, the control signal, and the state information of the battery to the communication unit 120. . The inertial navigation unit 110 and the communication unit 120 communicates through the UART port.

The detailed configuration of the inertial navigation unit is shown in FIG. Referring to FIG. 2, the inertial navigation unit 110 includes an inertial sensor 210 and a microcomputer 220, and the microcomputer 220 includes an A / D converter 222, a RAM 224, and a flash memory. 226 and the CPU 228.

The inertial sensor 210 provided in the inertial navigation unit 110 calculates the distance traveled by the wave generator 100 by dividing the case of the acceleration component and the case of performing the constant velocity motion. The moving distance of the wave generator 100 calculated by the inertial sensor 210 is output in the form of analog values for each of the x, y, and z directions, and is converted into a digital value by the A / D converter 222. The moving distance converted by the A / D converter 222 is stored in the RAM 224 and periodically stored in the flash memory 226. The movement distance of the wave generator 100 stored in the flash memory 226 is a cumulative value. The CPU 228 controls the operation of the inertial navigation unit 110. The CPU 228 performs the movement stored in the flash memory 226 when there is no movement of the radio wave generator 100 for a predetermined time (for example, 10 minutes) or when the movement distance is smaller than the set threshold. Reset by clearing the distance. In addition, the CPU 228 may move to the control / external interface unit 140 when the moving distance input from the inertial sensor 210 exceeds the moving distance of the radio wave transmitting apparatus 100 stored in the flash memory 226. Output a control signal for notification of departure.

On the other hand, the microcomputer 220 of the inertial navigation unit 110 performs the initialization operation for the radio wave generator 100 to obtain information about the initial value of the radio wave generator 100. At this time, the microcomputer 220 of the inertial navigation unit 110 initializes the inertial sensor 210 periodically even when there is no change in the position value of the inertial sensor 210 in consideration of the positional movement by the user. By doing so, deterioration of hardware components can be prevented.

The communication unit 120 is a component that performs communication using a radio channel between the radio wave generator 100 and a terminal device located outside. The communication unit 120 includes a control unit 122, a wireless communication module 124, and an antenna 126.

The controller 122 controls the wireless communication module 124 to perform an operation corresponding to the control signal input from the inertial navigation unit 110 through the UART. The wireless communication module 124 transmits the identification information of the radio wave generating apparatus 100 to a terminal device located outside through the antenna 126. The operation of the wireless communication module 124 is continuously performed unless a separate control command is input from the controller 122. If the radio wave generating apparatus 100 moves over the set distance, the inertial navigation unit 110 outputs a control signal for notifying the deviation of the distance to the communication unit 120. In this case, the control unit 122 of the communication unit 120 outputs a control command for stopping the transmission of the identification information to the wireless communication module 124 or a control command for transmitting the separate information indicating a distance deviation together with the identification information. Outputs The wireless communication module 124 may be a communication module such as Bluetooth, WLAN, Zigbee, WUSB.

The power supply unit 130 provides operating power to each component of the radio wave generator 100. The power supply unit 140 includes a battery driving circuit 142, a battery 144, a charge pump 146, and a DC power converter 148.

The radio wave generating apparatus 100 basically uses a power provided from the outside (that is, a power supplied by converting AC (90 to 240V) power, which is an AC / DC converter for home use, into DC power through a DC power input terminal). do. However, when the user moves the radio wave generator 100, since the external power is cut off, the user receives power from the internal battery 144. This prevents the discharge of the battery 144 mounted at the factory and controls the battery driving circuit 142 to the IO port for power supply during normal operation. In addition, when the remaining power falls below a certain level by checking the discharge state of the battery 144, the microprocessor 220 of the inertial navigation unit 110 stores all the state information of the radio wave generator 100 in the flash memory 226. do.

The charge pump 146 boosts and rectifies the 3V DC voltage from the commercial battery (1.5V DC, AAA) 144 to supply a stable voltage (3.2V DC) to the inertial navigation unit 110. In the remaining battery check function of the inertial navigation unit 110, the remaining battery shortage state is set higher than the minimum driving voltage of the charge pump 146. The DC power converter 148 converts the DC voltage input from the AC / DC converter into a stable DC voltage through the DC power input terminal and supplies the same to each component. The DC power supplied by the DC power converter 148 is 3.3V DC. This is to maintain the potential higher than the charge pump 146 of the battery 144 to prevent battery consumption during commercial operation.

In the radio wave generating apparatus 100 according to the present invention, a protocol is defined between each other using a UART for communication between the inertial navigation unit 110 and the communication unit 120, and the inertial navigation unit 110 and the communication unit 120 propagate. Separate processors are used for the consideration of the mobility of the generator 100 and for the distance measurement during the movement of the generator.

The following is a detailed description of the process of the control method of the radio wave generator 100.

First, in the initialization process of the wave generator 100, a 1 second timer is operated to generate three logical timers (three different flags). The function and role of each timer are as follows.

The first timer is a timer for recording a movement distance at a specific address of the flash memory 226 at predetermined time intervals (for example, 20 seconds).

Second timer: A timer for initializing the moving distance and recording in the flash memory 226 when the radio wave generator 100 does not move for a predetermined time (for example, 10 minutes). The radio wave generating apparatus 100 compares the distance that is first started for each operation time of the second timer with the movement distance, and initializes the movement distance when the movement distance is smaller than the preset reference distance (for example, 1m). 0).

Third timer: A timer for recalibrating the radio wave generator 100. If each moving distance measured at a predetermined time interval (for example, 2 seconds) is constant during the operation period (for example, 10 seconds) of the third timer, the radio wave generating apparatus 100 may operate during the operation period. Reset the travel distance to 0. Also, the radio wave generating apparatus 100 checks cal_flag and calls the correction function in the A / D conversion start loop. The operation related to the third timer is performed when the user of the radio wave generator 100 is located at an inclined position of the radio wave generator 100. That is, when the radio wave generating apparatus 100 is located at an inclined point, the amount of movement in the x, y, and z directions is output from the inertial sensor 210 even when there is no movement. At this time, the amount of movement is a constant amount of movement per unit time, such as when the radio wave generator 100 is a constant velocity movement. Meanwhile, in order to consider the error of the inertial sensor 210, a constant error tolerance value (for example, ± 0.03m) is applied to the movement amount measured at a predetermined time interval during the operation period of the third timer.

The correction function is expressed by the following equation, and the amount of movement to the x, y, and z axes, which are input from the inertial sensor 210 by the correction function and converted into digital data by the AD converter 222, is used to calculate the movement distance. It is decided whether to use.

,

,

At this time, if the moving distances measured at regular time intervals are constant for each operating time of the third timer, the CPU 228 defines the acceleration tool interval based on the upper limit value and the lower limit value calculated by Equation 1, and the RAM 224. Of the accelerations calculated by the movement amounts corresponding to the respective axial directions stored in the accelerators, the accelerations deviating from the acceleration tool are excluded in the calculation of the movement amount.

When the timer is set, the infinite loop is executed until the service start message is received from the UART. Subsequently, the CPU 228 of the inertial navigation unit 110 simply executes several loops to discard the garbage value first input from the AD converter 222. Next, the correction function is called during the first run of the program, and the distance calculation loop is executed by continuously inputting a value from the AD converter using the infinite loop syntax. At this time, the correction function is called only when Cal_flag is changed (when the operation time of the second timer is reached or the initialization request).

On the other hand, the AD converter interrupt routine is driven by the following execution procedure.

1. Calculate the corrected x, y, z value from the AD converter output value and calculate the acceleration value.

2. Drive the pedometer function. At this time, a flag is set to calculate the distance with a pedometer, and if the flag is set, the distance is not calculated with acceleration.

3. The travel distance is calculated by measuring acceleration and pedometer. First, the moving distance is calculated by using a distance calculation algorithm based on the maximum value and the minimum value of the acceleration obtained when the distance is calculated by the acceleration. Since the distance calculation algorithm using acceleration is well known to those skilled in the art, a detailed description thereof will be omitted. Next, when the pedometer flag is set in the distance calculation by the pedometer, the moving distance is increased by 0.4 m for every pulse of the pedometer.

In addition, the UART interrupt routine is:

1. Recv (1)-> When the service start request message is received, it sets the start_flag to get out of the waiting state and sends a message to send (2) to respond to the service start.

2. Recv (3)-> When the distance request message is received, it sends the distance response message to send (4) and responds to the distance with send (distance).

3. When Recv (5)-> reset message is received, set distance = 0 to reset the moving distance. Next, the moving distance set in the flash memory 226 is initialized. Cal_flag is also set to call the correction function in the start loop of AD converter 222 in Main (). And, send (6) responds with service reset message.

4. Recv (7)-> Receives a battery status request message and responds with send (8).

Meanwhile, the correction function calculates correction values for x, y, and z values input from the AD converter 222. At this time, the maximum and minimum values of the acceleration (a) are obtained, 0.03 is added to the acceleration maximum value obtained for the slight error correction, and 0.03 is subtracted from the minimum value.

3 is a flowchart illustrating a process of generating location information according to the present invention.

Referring to FIG. 3, the CPU 228 initializes the inertial sensor 210 and sets an allowable upper limit value and an allowable lower limit value for the inertial sensor (S300). When the control signal is input from the CPU 228, the A / D converter 222 converts the movement amount in the respective axial directions input from the inertial sensor 210 into digital data (S310). Next, the CPU 228 calculates the movement distance based on the movement amount existing between the allowable upper limit value and the allowable lower limit value among the movement amounts in each axial direction converted into digital data (S320). On the other hand, the CPU 228 monitors the operation of the timer after generating three timers (first timer, second timer, and third timer) (S330).

When the second timer operates (ie, reaches the operation cycle of the second timer), the CPU 228 compares the movement distance measured during the operation cycle of the second timer with the initialization reference distance (S340). If the movement distance measured during the operation period of the second timer is smaller than the initialization reference distance, the CPU 228 initializes the movement distance stored in the flash memory 226 (S350). In contrast, when the first timer operates (ie, reaches the operating cycle of the first timer), the CPU 228 records the movement distance measured during the operating cycle of the first timer at a specific address of the flash memory 226. (S360). Next, the CPU 228 compares the movement distance (that is, the accumulated movement distance) recorded at the specific address with the movement tolerance distance (S370). If the accumulated moving distance is larger than the allowable moving distance, the CPU 228 outputs a control signal informing of exceeding the allowable moving distance (S380). On the other hand, when the third timer operates (i.e., reaches the operating cycle of the third timer), the CPU 228 checks whether the measured moving distances are the same every predetermined time interval (e.g., 2 seconds) ( S390). If the measured moving distances are the same for each predetermined time interval, the CPU 228 initializes the moving distance for the third period stored in the flash memory 226, and calls the correction function to allow the allowable upper limit value and the allowable lower limit value. Correct the (S400).

The radio wave generating apparatus according to the present invention can be applied to various services. For example, when the mobile communication device enters a specific area, a service that applies a separate communication charge policy may be provided. At this time, there are various methods of notifying that the mobile communication device exists in the corresponding area as the service providing device, and one of them is a method of using a radio wave generating device. That is, the service providing device may hold the identification information of the radio wave generating device and information on the installation location, and provide the service by identifying the location of the mobile communication terminal based on the identification information of the radio wave generating device received from the mobile communication device. Can be. However, in this case, if the position of the radio wave generator is changed, even if the mobile communication device does not exist in a predetermined area, the service providing device is based on the identification information of the radio wave generator received from the mobile communication device. The problem of providing a service may be determined by determining that a location exists in a predetermined area. Therefore, if the radio wave generating apparatus according to the present invention is adopted, it is possible to prevent the provision of unplanned services to the mobile communication terminal by transmitting a signal notifying the identification information or the place departure when the radio wave generating apparatus leaves the predetermined area. have.

The invention can also be embodied as computer readable code on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet). Include. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific preferred embodiments described above, and the present invention belongs to the present invention without departing from the gist of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such changes are within the scope of the claims.

According to the radio wave generating device having a positioning function and the position information generating method according to the present invention, it is possible to determine whether the radio wave generating device is moved and provide a selective service according to the position. That is, in case of providing a service on the premise that the radio wave generator is in a fixed position, if the radio wave generator leaves the designated area, it does not send identification information or sends a signal informing the departure of the signal. It is possible to prevent the provision of an unplanned service to a terminal device receiving and requesting a service.

Claims (12)

An inertial navigation unit that measures a moving distance and outputs a control signal for notifying the moving distance exceeding a moving distance exceeding a predetermined allowable distance; Communication unit for transmitting the device identification information, and stops the transmission operation of the device identification information or transmits the information indicating the service restriction with the device identification information when the control signal for notifying the moving distance exceeded from the inertial navigation unit ; And And a power supply unit providing external power supplied from the outside to the communication unit, and supplying internal power mounted therein to the inertial navigation unit when supply of the external power is stopped. Radio wave generator. The method of claim 1, The inertial navigation unit, An inertial sensor for outputting a movement distance in the form of a movement amount corresponding to each axial direction of the three-dimensional coordinate system; A first storage unit storing movement amounts corresponding to respective axial directions input from the inertial sensor; A second storage unit storing a moving distance calculated based on the movement amount stored in the first storage unit; And The moving distance is calculated and stored in the second storage unit every predetermined first period, and when the moving distance stored in the second storage unit exceeds the allowable distance, a control signal for notifying the deviation of the restricted distance is output. A radio wave generating device having a positioning function, characterized in that it comprises a control unit. The method of claim 2, The inertial navigation unit further includes an A / D converting unit converting a movement amount corresponding to each axial direction input from the inertial sensor into digital data, The controller calculates a movement distance based on the remaining data except for a predetermined number of data initially input from the movement amounts corresponding to the respective axial directions converted into the digital data by the A / D converter. Radio wave generating device with positioning function. The method of claim 2 or 3, The control unit initializes the movement distance stored in the second storage unit when the movement distance stored in the second storage unit is smaller than a predetermined initialization reference distance every predetermined second period. Radio wave generating device having a. The method of claim 2 or 3, The controller may be configured to perform the third period stored in the second storage unit when the moving distances measured in units of a predetermined time interval are equal to each other or the difference in the moving distances is within a predetermined error allowable range every third predetermined period. The acceleration distance is initialized, the acceleration tool is defined based on the upper limit value and the lower limit value calculated by the following equation, and the acceleration is calculated from the accelerations calculated by the movement amounts corresponding to the respective axial directions stored in the first storage unit. A radio wave generating device having a positioning function, characterized in that the acceleration outside the section is excluded when calculating the movement amount:

,

Where L _high (x, y, z) and L _low (x, y, z) are the upper and lower limits, respectively, max (a _{(x, y, z)} ) and min (a _{(x, y, z)} ). Are the maximum and minimum values of the acceleration measured during the reference time and calculated based on the movement amounts corresponding to the respective axial directions stored in the first storage unit, and α _max and α _min are the maximum and minimum values of the acceleration, respectively. The correction value for. The method of claim 2, The control unit is a radio wave generating device having a positioning function, characterized in that for transmitting and receiving a signal through the communication unit and the UART port. Transmitting device identification information; Measuring a moving distance; Outputting a control signal notifying a movement distance exceeded when the measured movement distance exceeds a predetermined allowable movement distance; And When the control signal for notifying the moving distance is input, stopping the transmission operation of the device identification information or transmitting information indicating the service restriction together with the device identification information; generating location information comprising a Way. The method of claim 7, wherein The moving distance measuring step, Measuring, by the inertial sensor, the movement distance in the form of a movement amount corresponding to each axial direction of the three-dimensional coordinate system and storing it in the first storage means; And Calculating the moving distance based on the movement amount corresponding to each of the axial directions stored in the first storage means for each predetermined first period, and storing the movement distance in the second storage means. How to create. The method of claim 8, The moving distance measuring step, Converting a movement amount corresponding to each axial direction input from the inertial sensor into digital data; And Storing the movement amount corresponding to each axial direction converted into the digital data in the first storage means; And the movement distance is calculated based on the remaining data except for a predetermined number of data initially input among the movement amounts corresponding to the respective axial directions converted into the digital data. The method according to claim 8 or 9, And resetting the movement distance stored in the second storage means when the movement distance stored in the second storage means is smaller than a predetermined initialization reference distance every predetermined second period. How to generate verification information. The method according to claim 8 or 9, If the moving distances measured in a predetermined time interval unit every predetermined third period are equal to each other or the difference in the moving distances is within a predetermined error tolerance range, the moving distance during the third period stored in the second storage means is determined. Initializing and defining an acceleration tool based on the upper limit value and the lower limit value calculated by the following equation; Wherein the movement distance is calculated by excluding an acceleration deviating from the acceleration tool among the accelerations calculated by the movement amount corresponding to each axial direction stored in the first storage means.

,

Where L _high (x, y, z) and L _low (x, y, z) are the upper and lower limits, respectively, max (a _{(x, y, z)} ) and min (a _{(x, y, z)} ). Are the maximum and minimum values of the acceleration measured during the reference time and calculated based on the movement amounts corresponding to the respective axial directions stored in the first storage unit, and α _max and α _min are the maximum and minimum values of the acceleration, respectively. The correction value for. A computer-readable recording medium having recorded thereon a program for executing the positioning information generating method according to any one of claims 7 to 9.

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