KR101443675B1 - Radio Signal Measuring System for Vehicle - Google Patents

Abstract

The vehicle radio wave measuring system of the present invention comprises: an antenna receiving signal input terminal for receiving a signal received from an antenna means mounted on a vehicle; A position calculating section for determining a position of the vehicle; An electric field measurement unit for measuring an electric field value of a reception signal received at the antenna reception signal input terminal; A field strength calculator for calculating a field strength in real time by applying a correction value or a weight according to antenna means for receiving the signal; A mapping unit for mapping the calculated electric field intensity to a digital map using the position information of the vehicle determined by the position calculating unit; And a display unit for visually outputting information in which the electric field strength is mapped to the digital map.

Description

Technical Field [0001] The present invention relates to a radio signal measuring system for vehicle,

The present invention relates to a radio wave measuring system for measuring a surrounding radio wave environment in a moving vehicle, and more particularly to a radio wave measuring system for a vehicle for measuring various radio wave environments used by a vehicle.

Unlike in the days when only radio and analog TV services were available in the vehicle, recently, there are GPS, which can grasp its position using satellite communication, and DMB, which can provide high quality sound and high-definition broadcasting even in vehicles running , And services for providing diverse contents for better environment to the driver through the mobile communication network are being developed. The main trend is to receive such services in the form of wireless communication in vehicles. In order to realize such a wireless communication environment, various antennas corresponding to the characteristics are required. In order to develop an antenna suitable for a vehicle, a radio wave measuring means for analyzing the receiving performance analysis and the change of the surrounding environment easily, accurately, Required.

If the conventional technology for measuring the radio wave according to the environment is applied, the frequency signal can be analyzed by the spectrum for each system. However, when the propagation characteristics are different due to the surrounding environment, it is difficult to analyze the performance through spectrum equipment. In addition, because the vehicle field is continuously evaluated at a certain speed during the evaluation, it is difficult to analyze the performance with only the spectrum equipment.

In addition, there is a great difficulty in analyzing the field around the environment mounted on the vehicle when evaluating the actual vehicle (evaluating the antenna by mounting the antenna on the vehicle).

The present invention seeks to provide a radio wave measuring system in a vehicle operating environment which can be conveniently and easily used.

Alternatively, the present invention aims to provide a radio wave measuring system in a vehicle operating environment in which field analysis of the terrain is easy.

Another object of the present invention is to provide a radio wave measuring system in a vehicle operating environment capable of smoothly performing antenna performance analysis for each terrain by interlocking with GPS.

An electric wave measurement system for a vehicle according to an aspect of the present invention includes: an antenna reception signal input terminal for receiving a signal received from an antenna means mounted in a vehicle; A position calculating section for determining a position of the vehicle; An electric field measurement unit for measuring an electric field value of a reception signal received at the antenna reception signal input terminal; A field strength calculator for calculating a field strength in real time by applying a correction value or a weight according to antenna means for receiving the signal; A mapping unit for mapping the calculated electric field intensity to a digital map using the position information of the vehicle determined by the position calculating unit; And a display unit for visually outputting information in which the electric field strength is mapped to the digital map.

Here, the antenna reception signal input terminal may include a line connected to a specific antenna means mounted on a vehicle and a connection terminal for connecting the line.

The antenna means may be at least one of AM / FM, DMB, LF, TPMS, GSM, HSDPA, GPS, and WAVE signal receiving means.

Here, the electric field intensity calculation unit may calculate the electric field intensity in real time by applying a correction value or a weight to the electric field value measured by the electric field measurement unit differently according to the antenna means connected to the antenna reception signal input line.

Here, the mapping unit reads map data stored in an external DB or the like, which can be accessed through an internal memory or a wireless network, and stores the map data at a point on the map data corresponding to the position information of the vehicle at a specific time, The mapping can be performed in such a manner that the electric field intensity calculated by the electric field intensity calculating section is applied.

Here, the mapping unit may apply different colors to the map data according to the electric field intensity, and the display unit may display the map data at a position corresponding to the electric field intensity at the point when the map data is displayed It can be displayed in the color corresponding to it.

Here, the antenna reception signal input terminal receives two or more different kinds of signals, and the mapping unit can perform field intensity mapping on two or more different types of signals in one map data.

Here, the display unit may display a window for outputting the mapped digital map and a window for setting a measurement environment.

Here, the display unit displays, as a measurement result report, at least one of the measurement conditions, the map of the measurement point where the electric field strength is displayed in color, the graph of the measured electric field intensity, the analysis result of the measured electric field intensity, One can be output.

The vehicle radio wave measuring system of the present invention according to the above configuration has an advantage of providing radio wave measuring means in a vehicle operating environment which can be conveniently and easily used.

Further, the present invention has an advantage that field analysis of the terrain in the vehicle management environment is easy.

In addition, the present invention has an advantage in that the performance of the actual vehicle of the antenna under development can be easily compared with other samples.

1 is a block diagram showing a vehicle radio wave measuring system in a vehicle operating environment according to an embodiment of the present invention;
2A and 2B are display screens for the basic setting of a vehicle radio wave measuring system according to an embodiment of the present invention.
FIG. 3 is a display screen showing a state in which the adjustment of the graph scale setting area of FIG. 2B is reflected on the map. FIG.
4A and 4B are display screens for device setting of a vehicle radio wave measuring system according to an embodiment of the present invention.
4C and 4D are views showing a measurement result report provided by a vehicle radio wave measuring system according to an embodiment of the present invention.
5A and 5B are display screens for detailed setting of a vehicle radio wave measuring system according to an embodiment of the present invention.
6A and 6B are measurement screens of a radio wave measurement system for a vehicle according to an embodiment of the present invention.
FIGS. 7A and 7B are views showing a window in which information is received from a GPS of a vehicle radio wave measurement system according to an exemplary embodiment of the present invention. FIG.
8 is a display screen in which a map of a vehicle radio wave measuring system according to an embodiment of the present invention is also output.
9 is a screen in which a map is displayed in full screen size by double-clicking the map in Fig.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 shows a vehicle radio wave measuring system in a vehicle operating environment according to an embodiment of the present invention.

The vehicle radio wave measuring system includes an antenna receiving signal input terminal 120 for receiving a signal received from an antenna means mounted on a vehicle; A position calculating unit 130 for determining the position of the vehicle; An electric field measurement unit 140 for measuring an electric field value of a reception signal received at the antenna reception signal input terminal; A field strength calculator 150 for calculating a field strength in real time by applying a correction value or a weight according to antenna means for receiving the signal at the antenna reception signal input terminal; A mapping unit (160) for mapping the calculated electric field intensity to a digital map using the position information of the vehicle determined by the position calculation unit; And a display unit 180 for visually outputting information in which the electric field strength is mapped to the digital map.

The antenna reception signal input terminal 120 may include a line connected to a specific antenna means mounted on the vehicle and a connection terminal for connecting the line. A reception signal in which the physical antenna acquires a radio signal is transmitted through the line.

The field measurement unit 140 may be implemented as a hardware circuit for measuring an electric field of the reception signal input to the antenna reception signal input terminal 120.

The electric field intensity estimating unit 150 may apply a correction value or a weight to the electric field value measured by the electric field measuring unit 140 according to the antenna means connected to the antenna receiving signal input terminal 120, .

The antenna means may be various radio signal receiving means installed in the vehicle. For example, the antenna means may be a AM / FM, DMB, LF, TPMS, GSM, HSDPA, GPS, WAVE signal receiving means or the like, Either can be applied.

Currently, radio wave receiving means applied to vehicles are various types such as Micro ANT, Shark's Fin ANT, Glass ANT, Hidden ANT, etc., and can be used for radio (AM, FM) reception, LF (smart key system), TPMS, TDMB, It is possible to apply one of the various physical antennas included therein to the antenna means.

The position estimating unit 130 is for acquiring position information of the current position of the vehicle (i.e., the current position of the radio wave measuring apparatus installed in the vehicle), and is implemented as a GPS module that receives the GPS satellite signal and acquires the position coordinates . In another implementation, the positional information obtaining means of the method of applying a triangulation method to the signal strength of a beacon (e.g., a base station of a cellular communication network, a Wi-Fi base station) that knows location information, or calculating a movement amount from a specific point by using a gyro sensor Or by supplementing the GPS module with the information obtaining means.

The mapping unit 160 reads out map data stored in an external DB or the like that can be accessed through an internal memory or a wireless network and stores the map data at a point on the map data corresponding to the position information of the vehicle at a specific time point, And mapping is performed in such a manner that the electric field intensity calculated by the electric field intensity calculating section is applied. For example, different colors may be applied to the map data according to the electric field intensity. That is, when the electric field intensity is higher than the receivable level, it is green. When the electric field intensity is higher than the receivable level, it is yellow. When the electric field intensity is lower than the receivable level, it is red.

Then, when displaying the mapped map data, the display unit 180 displays the display color of each position on the map in a color corresponding to the electric field intensity at that point, so that the user can easily display the electric field intensity Geographical distribution can be confirmed.

According to the implementation, the vehicular wave measurement system of the present invention can perform field strength mapping for two or more different kinds of signals in one map data. For example, the reception intensity of the DMB signal may be represented by red-based colors and the FM reception intensity may be represented by blue-based colors in map data representing roads through which the vehicle can travel. Alternatively, the reception intensity of the vehicle signal (FM, etc.) may be represented by red-color hues, and the reception intensity of the cellular mobile communication signal may be represented by hues of the blue color series.

As described above, in order to simultaneously measure the signal strength of the frequency band in which two or more characteristics are different from each other, the antenna reception signal input terminal of the vehicle radio wave measuring system of the present invention is configured such that two or more antennas Signal interface devices (e.g., matching resistors). Alternatively, in order to sequentially measure the signal strength of the frequency band in which two or more characteristics are different for the vehicular electric wave measurement system of the present invention, the antenna reception signal input terminal may include an antenna signal interface for matching signals of two or more frequency bands, Device (e.g., a variable matching resistor). This is because the frequency spectrum of the received signal requires much wider signal processing than conventional cellular signal measurement techniques.

The antenna receiving signal input terminal 120 which is a feature of the present invention can dedicate an existing vehicle component capable of receiving radio waves as an antenna without providing a physical antenna for separate measurement, It is possible to save labor.

FIGS. 2A and 2B show a display screen for basic setting of a vehicle radio wave measuring system according to an embodiment of the present invention. The setting process of the vehicle radio wave measuring system includes the measurement environment setting and the graph setting before starting the measurement.

The screen shown in Fig. 2A shows the entire screen on the display device, and the screen shown in Fig. 2B is an enlarged view of the screen shown in Fig. 2A for setting the environment.

Equipment Under Test Information (11) Details of the contents displayed in the area are as follows. Test Engineer Represents a test authority. Our laboratory is set up by default but can be changed. Date The current date and time are displayed to reflect the measured time. Customer can enter customer as Customer. Model / Revision allows input of sample name. Antenna Version It is defaulted to the most used sample, but it can be changed. The test condition measurement environment can be recorded as a special or other information for the user to accept the measurement result.

The switch means 12, 14 function to start and end the measurement. At the end, the data log file is saved automatically, and the report is made up of an Excel file, and you can execute the Save Excel File (29). When the measurement is started in response to the operation of the switch means 12, the operation display area 3 flashes green. The time window 15 indicates the current time and may be displayed at the beginning of the Report file name. In the log file window 16, although the data logging file is described as an explanation, the name of the data logger can be modified by the measurer.

In the sampling period window (17), the amount of data that can be received at the same time can be adjusted by setting the sampling time for receiving the signal.

A and B in the graph scale setting area (18) determine the range of the vertical axis of the entire graph. Values larger than c are green, values between c and d are yellow, values smaller than d are red ) Can be displayed on the map. The value set in the contents shown in FIG. 2B can be retained by clicking the environment setting storage 10 in the SETUP tab of FIG. 2A.

FIG. 3 shows a view in which the adjustment of the graph scale setting area 18 of FIG. 2B is reflected in the map.

As shown, paths are shown on the map with different colors according to the electric field intensity specified in the environment setting. If you want to see the past graph after the time elapsed after measurement, press the tracking button (2) to stop the graph and to see the previous graph.

The vertical axis of the enlarged graph shows the vertical axis of the graph determined according to the value set in the environment setting.

The screen shown in FIG. 4A is a full screen on the display device as shown in FIG. 2A, and the screen shown in FIG. 4B is an enlarged view of the screen shown in FIG . That is, the screen of FIG. 4B is composed of settings for the storage paths of Spectrum Analyzer, DGPS, GPS, Data, Excel, and Map files used for measurement.

After connecting the GPS to the computer, press the setup button and the green light will come on the lamp (ㅁ).

The address window (21) is used to set the GPIB I / F address of Spectrum Analyzer.

The DGPS information and the port number associated with the computer can be entered into the port window (22).

In the GPS setting window 23, it is necessary to select Enable GPS as the item for the case of the above-described port window 22 with the setting to be used for measurement with a general GPS.

The message window 24 indicates the port number connected to the computer and sets the port value displayed in the port window 22 and the GPS setting window 23. When the measurement starts, a GPS signal is received.

The path window 25 indicates the path where the data (the log data to be automatically saved at the end of the measurement) and the MAP file (the report after the measurement is completed) are stored.

The operation of the automatic setting button 26 functions to apply the stored spectrum analyzer setting, and the operation of the detailed setting button 27 causes the detail setting window of FIG. 5, which is linked with the spectrum analyzer, to be displayed. The operation of the save button 28 causes the environment setting described above to be performed so as to be applied even if the program is restarted.

The operation of the report button 29 allows the measurement to be normally completed and to perform the function of storing the report. At this time, FIGS. 4C and 4D show examples of the stored Report. As can be seen from FIG. 4C, the report includes the measurement date and time, measurement conditions such as the antenna used in the measurement, a map of the measurement point in which the electric field intensity is indicated in color, a graph of the measured electric field intensity, , A minimum value, an average value field strength, an average speed, and the like. As shown in FIG. 4D, the numerical data of the measured field strength is represented by an Excel data format.

5A shows a screen of the detailed setting window. If you connect the Spectrum Analyzer to your computer, you can control Spectrum through the program.

The detailed setting window shown in the figure includes function buttons 31 for setting detailed settings in real time in accordance with the characteristics of antennas to be measured to set values for finding electric field strengths and storing and loading the settings, Button (32).

FIG. 5B shows a window that is opened when the same sample is measured when the environment of the sample to be frequently measured is preset by using the buttons 31 and 32 and is saved.

In Fig. 5b, ifconfig.ist is set as the default setting (the most used sample environment is set), and the remaining samples are stored in different names.

6A and 6B show measurement screens of a vehicle radio wave measuring system according to an embodiment of the present invention. The screen shown in Fig. 6A shows the entire screen on the display device at the time of measurement, and the screen shown in Fig. 6B shows an electric field graph of the antenna measured in the screen of Fig. 6A, It is an enlarged graph part.

The yellow line on the screen shown in the figure is the measured graph. If you put a cursor with green cross on the graph as shown in 41, the data at that point appears in the display position 42. In the display No. 42, the latitude, longitude and electric field value at the point of the cursor are displayed.

In the display area 43, the maximum sampling value and speed of the stored data are displayed. In the display area 44, the start and stop frequencies of the measured antenna, the center frequency, and the span are displayed.

A function of enlarging a red line and a blue rectangle on the screen according to the operation of the zoom button 45 is performed and a function of restoring the enlarged graph is performed according to the operation of the plot button 46 Dysfunction). The function of loading the log file measured and stored according to the operation of the read button 47 is performed and the function of erasing the loaded data is performed according to the operation of the clear button 48 (that is, the inverse function of the data open).

FIGS. 7A and 7B are views showing a window in which a window for outputting information received from a GPS of a vehicle radio wave measuring system according to an embodiment of the present invention is outputted. The screen shown in Fig. 7A shows the entire screen on the display device, and the screen shown in Fig. 7B is an enlarged view of a window in which information received from DGPS or GPS in the screen of Fig. 7A is output.

The time information window 51 shows time and date information. The GPS window 52 indicates the speed of the moving means with DGPS or GPS attached. The screen shown in the figure is a screen captured in the stopped state, and the detailed speed is not displayed. The location information window 53 shows latitude and longitude information received from the GPS.

A flashing green light on the lamp 54 indicates that the GPS is operating normally.

When the illustrated DGPS window is activated, there are two cases when the measurement is started and when the Start button is pressed. When the measurement is started, the Start and Stop buttons (55) are not activated.

FIG. 8 is a view illustrating a map of a vehicle electric wave measurement system according to an embodiment of the present invention.

The map information area 61 on the screen shows the latitude and longitude of the upper left corner and the lower right corner of the map. It is possible to perform a function of calling the map by operating the operation buttons 62 and removing the loaded map. In addition, when the size of the map is small as the need arises and the identification is difficult, the map may be double-clicked to display the map in full screen as shown in FIG. 9. The information displayed on the entire screen may include frequency information, Information, field strength level, and so on, and you can double-click the map again to return to the original map size.

It should be noted that the above-described embodiments are intended to be illustrative, not limiting. In addition, it will be understood by those of ordinary skill in the art that various embodiments are possible within the scope of the technical idea of the present invention.

120: Antenna reception signal input terminal
130:
140:
150:
160:
180:

Claims (9)

An antenna reception signal input terminal for receiving a signal received from an antenna means mounted on a vehicle;
A position calculating section for determining a position of the vehicle;
An electric field measurement unit for measuring an electric field value of a reception signal received at the antenna reception signal input terminal;
A field strength calculator for calculating a field strength in real time by applying a correction value or a weight according to antenna means for receiving the signal;
A mapping unit for mapping the calculated electric field intensity to a digital map using the position information of the vehicle determined by the position calculating unit; And
And a display unit for visually outputting information in which the electric field intensity is mapped to the digital map,
Wherein the electric field intensity calculation unit calculates the electric field intensity in real time by applying a correction value or a weight differently to the electric field value measured by the electric field measuring unit according to the antenna means connected to the antenna reception signal input line. The method according to claim 1,
Wherein the antenna reception signal input terminal includes a line connected to a specific antenna means mounted on a vehicle and a connection terminal for connecting the line. The method according to claim 1,
Wherein the antenna means is at least one of AM / FM, DMB, LF, TPMS, GSM, HSDPA, GPS, and WAVE signal receiving means. delete The method according to claim 1,
The mapping unit reads map data stored in an external DB that can be accessed through an internal memory or a wireless network and stores the map data at a point on the map data corresponding to the vehicle position information at a specific point of time, And the mapping is performed in such a manner that the electric field intensity calculated by the calculation section is applied. 6. The method of claim 5,
Wherein the mapping unit applies different colors to the map data according to electric field intensity,
Wherein the display unit displays the display color of each position on the map in a color corresponding to the electric field intensity at the point when displaying the mapped map data. The method according to claim 1,
An antenna reception signal input terminal receives two or more different kinds of signals,
Wherein the mapping unit performs field strength mapping for two or more different kinds of signals in one map data. The method according to claim 1,
Wherein the display unit displays a window for outputting the mapped digital map and a window for setting a measurement environment. The method according to claim 1,
The display unit displays, as a measurement result report, at least one of measurement conditions, a map of a measurement point where the electric field strength is displayed in color, a graph of the measured electric field intensity, an analysis result of the measured electric field intensity, To the vehicle.

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