KR102451844B1 - Apparatus for measuring position of user device for vehicles - Google Patents

Abstract

Disclosed is an apparatus for measuring a location of a user terminal for a vehicle. A vehicle user terminal position measuring apparatus of the present invention includes a plurality of sensors installed in the vehicle to receive a signal transmitted from the user terminal; a signal strength calculator for calculating the signal strength of the signal received by the sensor for each sensor; and a position measuring unit for selecting any one of a plurality of grids partitioned around a vehicle as the location of the user terminal according to the signal strength calculated for each sensor by the signal strength calculating unit.

Description

User terminal position measuring device for vehicle {APPARATUS FOR MEASURING POSITION OF USER DEVICE FOR VEHICLES}

The present invention relates to an apparatus for measuring a location of a user terminal for a vehicle, and more particularly, to a user terminal for a vehicle that selects any one of a grid set around a vehicle as a location of the user terminal based on the signal strength of a signal received through a plurality of sensors It relates to a position measuring device.

In general, a smart key system is a system that enables a driver to insert a separate key into a key box of a vehicle or to open and close a vehicle door and start a vehicle from the outside without a special operation for operation.

When a driver with a smart key approaches the vehicle, the vehicle (that is, the smart key system in the vehicle) is automatically unlocked through RF (Radio Frequency) communication (usually using 315/433MHz) with the smart key. The door can be opened without inserting a separate key, and the vehicle can be started without the process of inserting the ignition key after boarding the vehicle. Specifically, the smart key system requires an authentication request (LF frequency: usually use 125/134.2KHz) to identify the location of the smart key in the vehicle (that is, the smart key system in the vehicle), and authentication in which the smart key responds to this. This is accomplished by receiving a response (RF frequency) from the vehicle.

On the other hand, unlike the infrared communication method, Bluetooth communication has a feature that can connect and use several devices using an omni-directional radio frequency having no direction limitation. If only a relatively inexpensive Bluetooth chipset, which is smaller than a thumb, is installed in the device, wireless Bluetooth communication is possible. Therefore, various configurations using various devices having a Bluetooth module are possible.

Accordingly, Bluetooth communication can be applied to a remote control system or a smart key system.

However, when a smart key system is constructed using Bluetooth communication, the location of the smart key cannot be accurately determined due to various environmental factors such as an error rate of 1 to 3 m or more and metal materials, and the remote control command requested by the user There was a problem that the operation could not be performed according to the following.

The background technology of the present invention is disclosed in 'Vehicle smart key system using Bluetooth low energy' of Korean Patent Publication No. 10-2019-0071434 (2019.06.24).

The present invention has been devised to improve the above problems, and an object according to an aspect of the present invention is to locate any one of the preset grids around the vehicle based on the signal strength of signals received through a plurality of sensors, the location of the user terminal. It is to provide a vehicle user terminal position measuring device to be selected.

A vehicle user terminal position measuring apparatus according to an aspect of the present invention includes: a plurality of sensors installed in a vehicle to receive a signal transmitted from the user terminal; a signal strength calculator for calculating the signal strength of the signal received by the sensor for each sensor; and a position measuring unit for selecting any one of a plurality of grids partitioned around a vehicle as the location of the user terminal according to the signal strength calculated for each sensor by the signal strength calculating unit.

Each of the gratings of the present invention is characterized in that a signal strength range is set for each sensor.

The signal strength range of the present invention is characterized in that it is set based on an average value of the signal strength detected during a preset time for each sensor.

The signal strength range of the present invention is characterized in that at least one of a measurement environment for measuring the signal strength for each sensor, a measurement condition, and a measurement method are reflected and set.

The measurement environment of the present invention is characterized in that it includes at least one of a space in which the vehicle is parked and a ground state.

The measurement condition of the present invention is characterized in that it includes at least one of the height of the user terminal and the holding method of the user terminal.

The measurement method of the present invention is characterized in that it includes at least one of a measurement time for each sensor, the number of times of measurement, and a measurement period.

The position measuring unit of the present invention determines whether the signal strength calculated for each sensor by the signal strength calculator is included within the signal strength range for each sensor set in each of the gratings, and selects at least one of the gratings according to the determination result a grating detection unit to detect; and a location selector configured to select any one of the gratings detected by the grating detector as the location of the user terminal.

The location selection unit of the present invention is characterized in that it detects a center of gravity based on the center position of the grid detected by the grid detection unit, and selects the detected center of gravity as the location of the user terminal.

The location selecting unit of the present invention is characterized in that it detects a commonly detected grating among the gratings detected by the grating detecting unit and selects any one of the common gratings as the location of the user terminal.

The position selecting unit of the present invention detects a center of gravity based on the central position of a grating commonly detected among the gratings detected by the grating detection unit, and selects the detected center of gravity as the location of the user terminal. .

The present invention is characterized in that it further comprises an operation control unit for performing a preset operation matched to the position of the user terminal measured by the position measuring unit.

The operation control unit of the present invention divides the grid into a plurality of setting areas, and when the location of the user terminal is selected in any one of the setting areas by the position measuring unit, the operation set in the setting area where the user terminal is located characterized by performing

The setting area of the present invention includes an RKE area for remote keyless entry (RKE) operation, a driver's door area for opening a driver's door, a passenger's door area for opening the passenger's door, and a trunk area for opening the trunk, and vehicle interior function control It is characterized in that it includes at least one of the interior area for.

A vehicle user terminal position measuring device according to an aspect of the present invention selects any one of the grids set around the vehicle as the location of the user terminal based on the signal strength of the signal received through a plurality of sensors to determine the location of the user terminal It can be measured relatively accurately regardless of the environment and time.

1 is a block diagram of an apparatus for measuring a location of a user terminal for a vehicle according to an embodiment of the present invention.
2 is a view showing an arrangement position of a sensor according to an embodiment of the present invention.
3 is an exemplary diagram of a grating according to an embodiment of the present invention.
4 is an example of dividing each region in a grid according to an embodiment of the present invention.
5 is a flowchart of a method for measuring a location of a user terminal for a vehicle according to an embodiment of the present invention.

Hereinafter, an apparatus for measuring a location of a user terminal for a vehicle according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, definitions of these terms should be made based on the content throughout this specification.

Implementations described herein may be implemented in, for example, a method or process, an apparatus, a software program, a data stream, or a signal. Although discussed only in the context of a single form of implementation (eg, discussed only as a method), implementations of the discussed features may also be implemented in other forms (eg, as an apparatus or program). The apparatus may be implemented in suitable hardware, software and firmware, and the like. A method may be implemented in an apparatus such as, for example, a processor, which generally refers to a computer, a microprocessor, a processing device, including an integrated circuit or programmable logic device, or the like. Processors also include communication devices such as computers, cell phones, portable/personal digital assistants ("PDA") and other devices that facilitate communication of information between end-users.

1 is a block diagram of an apparatus for measuring a position of a user terminal for a vehicle according to an embodiment of the present invention, FIG. 2 is a view showing an arrangement position of a sensor according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention It is an exemplary view of a grid according to an embodiment, and FIG. 4 is an example in which each region in the grid is divided according to an embodiment of the present invention.

Referring to FIG. 1 , an apparatus for measuring a position of a user terminal for a vehicle according to an embodiment of the present invention includes a sensor 10 , a signal strength calculating unit 20 , a position measuring unit 30 , and an operation control unit 40 .

The sensor 10 receives a signal transmitted from the user terminal 50 . The sensor 10 may receive a signal through the user terminal 50 and various short-range wireless communication methods.

A short-range wireless communication method between the sensor 10 and the user terminal 50 may include Bluetooth Low Energy (BLE). However, the short-range wireless communication method is not limited to the above-described embodiment.

A plurality of sensors 10 are provided and may be installed in various positions of the vehicle. For example, as shown in FIG. 2 , the sensor 10 may be installed in the center of the front bumper, the left side of the front bumper, the right side of the front bumper, both B pillars, the center of the rear bumper, the left side of the rear bumper, the right side of the rear bumper, and the like of the vehicle. As such, the installation position and the number of installations of the sensor 10 are not particularly limited.

The user terminal 50 transmits a signal toward the sensor 10 . The user terminal 50 may include any device that transmits various signals for vehicle control, such as a mobile phone or a smart key, and is not particularly limited.

The signal strength calculator 20 calculates a received signal strength indicator (RSSI) of each signal transmitted from the user terminal 50 and received by each sensor 10 .

That is, when each sensor 10 receives a signal transmitted from the user terminal 50 , the signal strength calculator 20 calculates the signal strength of the signal received by each of these sensors 10 .

Since each sensor 10 is installed in various positions of the vehicle, the distance from the user terminal 50 is different from each other. As a result, the signal strength of the signal received by each sensor 10 is different from each other. As described above, since the signal strengths of the signals received by the respective sensors 10 are different from each other, the position of the user terminal 50 may be measured based on this.

The position measuring unit 30 selects any one of a plurality of grids partitioned around the vehicle as the location of the user terminal 50 according to the signal strength calculated for each sensor 10 by the signal strength calculating unit 20 . .

The grid may be set within a preset setting range around the vehicle as shown in FIG. 3 . The setting range may be set to a width of 10 × 10 (m). The center position of each grid is set in advance.

The width of the setting range may be variously set according to the communication method between the user terminal 50 and the sensor 10 or the surrounding environment, and is not limited to the above-described embodiment.

A plurality of gratings are set as described above, and a signal intensity range is set for each sensor 10 in each grating.

The signal strength range is set for each sensor 10 . For example, when there are eight sensors 10 , since the signal intensity ranges are set for each of these eight sensors 10 for each grid, a total of eight signal intensity ranges are set in one grid.

Each signal strength range is set based on the average value of the signal strength detected for a preset time.

In this case, the signal strength range may reflect at least one of a measurement environment for measuring the signal strength for each sensor 10 , a measurement condition, and a measurement method.

In the present embodiment, short-range wireless communication, for example, BLE, may have different signal strength depending on its measurement environment, measurement conditions, and measurement method.

Accordingly, when the signal strength range for each grid is set, these measurement environments, measurement conditions, and measurement methods are reflected, so that the positional accuracy of the user terminal 50 can be secured.

The measurement environment may include the space where the vehicle is parked and the ground condition. For example, the measurement environment may reflect an open space and a clear state, an off space and a wet ground state, an above-ground parking lot, or an underground parking lot.

The measurement conditions may include a height of the user terminal 50 and a holding method of the user terminal 50 . For example, the measurement conditions include a state in which the height of the user terminal 50 is 1 m or more (a state in which the user holds the user terminal 50 in his hand), a state in which the user puts the user terminal 50 in a pocket, and a state in which the user is the user. A state in which the terminal 50 is placed in a bag (such as a backpack or handbag) may be included.

The measurement method may include a measurement time for each sensor 10 , the number of times of measurement, and a measurement period. For example, the measurement method may include measurement after stopping for 2 minutes for each grid, collecting 10 pieces per second for each sensor 10, and acquiring a total of 1000 or more valid data.

Here, the measurement environment, the measurement conditions, and the measurement method are not limited to the above-described embodiment, and may be set in various ways.

That is, since the above-described signal strength range may be set according to the measurement environment, measurement condition, and measurement method at the location where the vehicle is parked, it may be different from each other according to the measurement environment, measurement condition, and measurement method even at the same location.

The position measurement unit 30 selects any one of a plurality of grids as the location of the user terminal 50 according to the signal strength calculated for each sensor 10 by the signal strength calculator 20 , and the grid detection unit 31 ) and a location selection unit 32 .

The grid detection unit 31 detects a grid including each of the signal strengths calculated for each sensor 10 by the signal strength calculation unit 20 within a signal strength range for each sensor 10 set for each grid.

That is, the grid detector 31 stores a signal intensity range for each sensor 10 for each grid. For example, the grid detector 31 stores a signal intensity range for each of the eight sensors 10 for each grid.

When the signal strength is calculated by the signal strength calculation unit 20, the grid detection unit 31 compares the signal strength for each sensor 10 with a preset signal strength range for each sensor 10, and each sensor 10 At least one of the signal strengths detects a grating that is included in the corresponding signal strength range.

In this case, a plurality of gratings whose signal strength for each sensor 10 is included within a signal strength range for each sensor 10 may be grouped and detected.

Meanwhile, when the grating is detected, it is not necessary that all signal strengths calculated for each sensor 10 by the signal strength calculator 20 are included in each of the signal strength ranges for each sensor 10 . That is, the grating detector 31 may detect a grating in which at least one or more of the signal intensities calculated for each sensor 10 by the signal intensity calculator 20 are included in the corresponding signal intensity range.

The location selection unit 32 selects any one of the grids detected by the grid detection unit 31 as the location of the user terminal 50 .

That is, the position selection unit 32 selects any one of the grids detected by the grid detection unit 31 as the location of the user terminal 50, and as shown in FIG. 4, the The center of gravity is detected based on the central position of the grid, and the detected center of gravity is selected as the location of the user terminal 50 .

On the other hand, the grating detection unit 31 may detect the grating as described above over a preset number of times, for example, three times, in this case, the positioning unit 32 detects the grating three times by the grating detecting unit 31 Any one of the commonly detected gratings may be selected as the location of the user terminal 50 .

Even in this case, the grating detector 31 may detect the center of gravity of the gratings commonly detected over a set number of times, and select the detected center of gravity as the location of the user terminal 50 .

The operation control unit 40 divides the grid into a plurality of setting regions, and when the position of the user terminal 50 is selected in any one of the setting regions by the position measuring unit 30, the setting region in which the user terminal 50 is located Execute the action set in

That is, the operation control unit 40 divides the grid into a plurality of setting areas.

The setting areas include the RKE area for remote keyless entry (RKE) operation, the driver's door area for opening the driver's door, the passenger's door area for opening the passenger's door, and the trunk area for opening the trunk, and the interior area for controlling vehicle interior functions At least one of them may be included.

The operation control unit 40 performs a corresponding RKE operation when the position of the user terminal 50 measured by the position measurement unit 30 is included in the RKE area. The operation control unit 40 opens the driver's door when the location of the user terminal 50 is included in the driver's door area. The operation control unit 40 opens the passenger door when the location of the user terminal 50 is included in the passenger door area. The operation controller 40 opens the trunk when the location of the user terminal 50 is included in the trunk area. When the location of the user terminal 50 is included in the interior area, the operation control unit 40 performs various functions inside the vehicle, for example, starting the engine.

Hereinafter, a method for measuring a position of a user terminal for a vehicle according to an embodiment of the present invention will be described in detail with reference to FIG. 5 .

5 is a flowchart of a method for measuring a location of a user terminal for a vehicle according to an embodiment of the present invention.

Referring to FIG. 5 , when the user approaches the vehicle with the user terminal 50 , the sensor 10 receives a signal transmitted from the user terminal 50 ( S10 ). A short-range wireless communication method between the sensor 10 and the user terminal 50 may include Bluetooth Low Energy (BLE).

As the signal from the user terminal 50 is received by the sensor 10 , the signal strength detector calculates a signal strength of each signal received by each sensor 10 ( S20 ). In this case, since the distances between the respective sensors 10 and the user terminal 50 are different from each other, the signal strengths of the signals received by the respective sensors 10 may be different from each other.

The grid detection unit 31 determines whether the signal strength calculated for each sensor 10 by the signal strength calculation unit 20 is included within the signal strength range for each sensor 10 set for each grid, and according to the determination result, at least one of the grids is detected (S30).

That is, the grid detection unit 31 stores the signal strength range for each sensor 10 for each grid, and when the signal strength is calculated by the signal strength calculation unit 20, the signal strength for each of these sensors 10 is described above. A lattice in which the signal strength of each sensor 10 is included within the signal strength range of each sensor 10 is detected by comparing with a preset signal strength range for each sensor 10 . In this case, a plurality of gratings having a signal strength for each sensor 10 within a signal strength range for each sensor 10 may be grouped and detected.

As the grid detection unit 31 detects a grid whose signal strength for each sensor 10 is within the signal strength range for each sensor 10 , the positioning unit 32 selects the grid detected by the grid detection unit 31 . The center of gravity is detected based on the central position (S40), and the detected center of gravity is selected as the location of the user terminal 50 (S50).

In this case, the grating detection unit 31 may detect the grating as described above over a preset number of times, for example, three times, and the positioning unit 32 detects the grating three times by the grating detecting unit 31 . It is also possible to detect the center of gravity of the gratings commonly detected among them, and select the detected center of gravity as the location of the user terminal 50 .

As described above, as the location of the user terminal 50 is selected, the operation controller 40 performs an operation set in the setting area where the user terminal 50 is located (S60).

That is, the operation control unit 40 sets the grid to a plurality of setting areas, for example, an RKE area for RKE operation, a driver's door area for opening the driver's door, a passenger's door area for opening the passenger's door, and a trunk area for opening the trunk, and It is divided into an interior area for controlling vehicle interior functions, and an operation of a setting area including the location of the user terminal 50 is performed.

As described above, the device for measuring the position of the user terminal for a vehicle according to an embodiment of the present invention determines the position of the user terminal 50 based on the signal strength of the signal received through the plurality of sensors 10 in any one of the grids set around the vehicle. By selecting , the location of the user terminal 50 can be relatively accurately measured regardless of the surrounding environment and time.

Although the present invention has been described with reference to the embodiment shown in the drawings, this is merely exemplary, and it is understood that various modifications and equivalent other embodiments are possible by those of ordinary skill in the art. will understand Accordingly, the true technical protection scope of the present invention should be defined by the following claims.

10: sensor
20: signal strength calculator
30: position measurement unit
31: grating detection unit
32: positioning unit
40: motion control

Claims (14)

A plurality of sensors installed in the vehicle to receive a signal transmitted from the user terminal;
a signal strength calculator for calculating the signal strength of the signal received by the sensor for each sensor; and
And a position measuring unit for selecting any one of a plurality of grids partitioned around the vehicle according to the signal strength calculated for each sensor by the signal strength calculating unit as the location of the user terminal,
A signal strength range is set for each of the gratings for each sensor,
The position measurement unit determines whether the signal strength calculated for each sensor by the signal strength calculator is included within the signal strength range for each sensor set in each of the grids, and detects at least one of the grids according to the determination result. detection unit; and a location selection unit for selecting any one of the grids detected by the grid detection unit as the location of the user terminal,
The location selection unit detects a center of gravity based on the center position of the grid detected by the grid detection unit, and selects the detected center of gravity as the location of the user terminal.
delete The method of claim 1, wherein the signal strength range is
A vehicle user terminal position measuring apparatus, characterized in that the sensor is set based on an average value of the detected signal strength for a preset time for each sensor.
The method of claim 1, wherein the signal strength range is
A vehicle user terminal position measuring device, characterized in that the setting by reflecting at least one of a measurement environment for measuring the signal strength for each sensor, a measurement condition, and a measurement method.
5. The method of claim 4, wherein the measurement environment is
A vehicle user terminal position measuring device, characterized in that it includes at least one of a space in which the vehicle is parked and a ground state.
5. The method of claim 4, wherein the measurement condition is
A vehicle user terminal position measuring device comprising at least one of a height of the user terminal and a holding method of the user terminal.
5. The method of claim 4, wherein the measuring method is
The vehicle user terminal position measuring device, characterized in that it comprises at least one of the measurement time, the number of times, and the measurement period for each sensor.
delete delete delete A plurality of sensors installed in the vehicle to receive a signal transmitted from the user terminal;
a signal strength calculator for calculating the signal strength of the signal received by the sensor for each sensor; and
And a position measuring unit for selecting any one of a plurality of grids partitioned around the vehicle according to the signal strength calculated for each sensor by the signal strength calculating unit as the location of the user terminal,
A signal strength range is set for each of the gratings for each sensor,
The position measurement unit determines whether the signal strength calculated for each sensor by the signal strength calculator is included within the signal strength range for each sensor set in each of the grids, and detects at least one of the grids according to the determination result. detection unit; and a location selection unit for selecting any one of the grids detected by the grid detection unit as the location of the user terminal,
The location selection unit detects a grid detected in common among the grids detected by the grid detection unit and selects any one of the common grids as the location of the user terminal,
The location selector detects a center of gravity based on a center position of a grid commonly detected among the grids detected by the grid detection unit, and selects the detected center of gravity as the location of the user terminal. position measuring device.
The apparatus of claim 1, further comprising: an operation control unit configured to perform a preset operation matched to the position of the user terminal measured by the position measurement unit.
The method of claim 12, wherein the operation control unit
The grid is divided into a plurality of setting regions, and when the location of the user terminal is selected in any one of the setting regions by the position measuring unit, an operation set in the setting region where the user terminal is located is performed. A vehicle user terminal position measuring device.
14. The method of claim 13, wherein the setting area is
At least one of an RKE area for remote keyless entry (RKE) operation, a driver's door area for opening the driver's door, a passenger's door area for opening the passenger's door, and a trunk area for opening the trunk, and an interior area for controlling a vehicle interior function Vehicle user terminal position measuring device comprising a.

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