JP2008241467A - Portable terminal device, method and program for measuring its altitude or the like, and recording medium storing the program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve performance in positioning by means artificial satellite radio waves with a small number of satellites capable of receiving satellite waves to shorten positioning time. <P>SOLUTION: A structure for calculating altitude or positioning of a portable terminal device (4) equipped with a communication function calculates a reference atmospheric pressure at an approximate position of the portable terminal device by means of atmospheric pressure information detected at the position of the device or atmospheric pressure information externally acquired by the device and approximate position information, and calculates the altitude of the approximate position of the portable terminal device by means of the reference atmospheric pressure and a detected atmospheric pressure at the position of the device. In addition, positioning information is provided to the portable terminal device based on the altitude and externally acquired positioning information. Such a structure can improve the positioning performance with the small number of satellites capable of receiving the satellite radio waves and shorten the positioning time, and enables simple and highly accurate calculation of the altitude value. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to an altitude measurement function and a positioning function mounted on a mobile terminal device such as a mobile phone, and relates to a mobile terminal device having a measurement function such as altitude, a measurement method for the altitude, a measurement program thereof, and a measurement program thereof It relates to the stored recording medium.

  A portable terminal device having a function of receiving GPS radio waves transmitted from a GPS (Global Positioning System) satellite performs positioning and altitude measurement using GPS radio waves.

  Regarding altitude measurement and positioning measurement using GPS radio waves, Patent Literature 1 discloses that a barometer is installed in a GPS receiver and a barometer is installed in a transmitter installed at a position where the altitude is known. It is disclosed that the altitude of a GPS receiver is determined based on the atmospheric pressure difference determined by the atmospheric pressure, and that altitude information is used for positioning calculation.

  Patent Document 2 discloses a GPS receiver that calculates the position of its own position using two-dimensional positioning and altitude information obtained from atmospheric pressure.

In Patent Literature 3, satellite waves are received from two GPS satellites for positioning of the current location, the reception time is corrected to the reference time of the GPS satellite, altitude data for positioning the current location is acquired from a database, It is disclosed that an estimated point of the current location is calculated from the wave transmission time and the corrected reception time, and the current location is determined from the estimated location and altitude data.
Japanese Patent Laid-Open No. 6-27214 (summary, FIG. 1 etc.) Japanese Patent Laid-Open No. 5-45436 (Summary, FIG. 1 etc.) Japanese Patent Laid-Open No. 11-109019 (summary, FIG. 1 etc.)

  By the way, in the method (patent document 1) which connects a transmitter provided with a barometer and a portable terminal device directly, of course, GPS positioning is limited to the area which can connect a transmitter and a portable terminal device. End up. In order to perform GPS positioning without being limited by a region, it is necessary to install transmitters equipped with barometers throughout the country.

  In positioning using an external signal source such as GPS, the positioning time can be shortened if the latitude information, longitude information, and altitude information, which are the initial values of the positioning calculation, are accurate, but in the case of a mobile terminal device, these initial values The information is not necessarily accurate because it is given at the location of the base station with which the mobile terminal device communicates, and is accurate if there is no means for obtaining altitude information for GPS positioning calculation. Unable to perform positioning.

  In addition, when the satellite radio waves cannot be received, such as when the number of satellites that can receive the satellite radio waves is small, sufficient positioning performance cannot be obtained with the mobile terminal device. In order to specify the three-dimensional position, it is necessary to receive radio waves from at least four satellites. Depending on the arrangement conditions of the satellites, the three-dimensional position becomes uncertain, and in that case, the positioning performance deteriorates and the positioning time becomes long. There was an inconvenience.

  Regarding such demands and problems, Patent Documents 1, 2, and 3 do not disclose or suggest them, and do not disclose or suggest a configuration that solves them.

  Accordingly, an object of the present invention relates to positioning using satellite radio waves, and is to improve positioning performance even when the number of satellite radio waves that can be received is small and to simplify positioning processing.

Another object of the present invention relates to a portable terminal device, and is to enable simple and highly accurate calculation of an altitude value.

  In order to achieve the above object, the present invention is a configuration for calculating the altitude or positioning of a mobile terminal device having a communication function, and the atmospheric pressure information detected at the position of the mobile terminal device or the atmospheric pressure acquired from the outside by the mobile terminal device The reference atmospheric pressure at the approximate position of the portable terminal device is calculated using the information and the approximate position information, and the altitude of the approximate position of the portable terminal device is calculated using the reference atmospheric pressure and the detected atmospheric pressure at the position of the portable terminal device. is doing. Further, the position of the mobile terminal device is obtained from this altitude and positioning information acquired from the outside. With such a configuration, even when the number of satellite radio waves that can be received is small, positioning performance can be improved, positioning time can be shortened, and altitude values can be calculated simply and accurately. .

  Therefore, in order to achieve the above object, a first aspect of the present invention is a mobile terminal device having a communication function, and includes approximate position information representing an approximate position of the mobile terminal device from the outside using the communication function, An information acquisition unit that acquires atmospheric pressure information, an atmospheric pressure detection unit that detects atmospheric pressure at the position of the mobile terminal device, and calculates a reference atmospheric pressure of the approximate position of the mobile terminal device using the atmospheric pressure information and the approximate position information And a calculation unit that calculates the altitude of the approximate position using the detected atmospheric pressure of the atmospheric pressure detection unit and the reference atmospheric pressure. With this configuration, the above object is achieved.

  In order to achieve the above object, the mobile terminal device preferably includes a positioning unit that performs positioning, and the positioning unit acquires positioning information acquired from an external signal source, and altitude information calculated by the calculating unit. The atmospheric pressure information acquired by the information acquisition unit may include position information and atmospheric pressure values of a plurality of points, and the calculation unit may determine the location of the point closest to the approximate position. The atmospheric pressure value may be selected as a reference atmospheric pressure, or the reference atmospheric pressure may be calculated from the atmospheric pressure values at a plurality of points close to the approximate position, and the atmospheric pressure information acquired by the information acquisition unit represents an isobaric line. Vector data or the vector data may be included, and the calculation unit may develop the vector data in an isobaric diagram and use a pressure value at a point closest to the approximate position as the reference pressure. With this configuration, the above object is achieved.

  To achieve the above object, a second aspect of the present invention is a method for measuring altitude or the like of a portable terminal device having a communication function, the step of detecting atmospheric pressure at the position of the portable terminal device, and the portable terminal device Calculating the reference atmospheric pressure at the approximate position of the portable terminal device using the atmospheric pressure information and the approximate position information acquired at step, and using the reference atmospheric pressure and the atmospheric pressure detected at the position of the portable terminal device Calculating the altitude of the approximate position of the mobile terminal device. With this configuration, the above object is achieved.

  In order to achieve the above object, a third aspect of the present invention is a measurement program for altitude or the like of a mobile terminal device having a communication function, which is executed by a computer, and the atmospheric pressure detected at the position of the mobile terminal device. A step of calculating, a step of calculating a reference atmospheric pressure at an approximate position of the mobile terminal device using the atmospheric pressure information and the approximate position information acquired by the mobile terminal device, and a detection at the reference atmospheric pressure and the position of the mobile terminal device And calculating the altitude of the approximate position of the mobile terminal device using the measured atmospheric pressure. With this configuration, the above object is achieved.

In order to achieve the above object, a fourth aspect of the present invention is a recording medium in which a measurement program such as altitude of a portable terminal device having a communication function, which is executed by a computer, is stored so as to be readable by the computer. The step of taking in the atmospheric pressure detected at the position of the mobile terminal device and the step of calculating the reference atmospheric pressure at the approximate position of the mobile terminal device using the atmospheric pressure information and the approximate position information acquired by the mobile terminal device. And a computer-readable measurement program including a step of calculating an altitude of the approximate position of the portable terminal device using the reference atmospheric pressure and the atmospheric pressure detected at the position of the portable terminal device. It is a configuration. With this configuration, the above object is achieved.

  According to the present invention, the following effects can be obtained.

  (1) The positioning performance can be improved and the positioning time can be shortened even when the number of satellite radio waves that can be received is small.

  (2) A simple and highly accurate altitude can be calculated.

  (3) Even when the number of satellites that can receive satellite radio waves is small, the obtained altitude can be used for positioning, so that positioning performance can be improved.

  (4) If the reference barometric pressure information for calculating altitude information is prepared before actual positioning, the positioning time can be shortened.

  (5) Positioning time can be shortened by providing a barometric pressure detector and preparing measured barometric pressure values.

(6) Since the approximate position of the mobile terminal device and the atmospheric pressure information shown in the weather map are used, altitude calculation and positioning can be easily performed.

Other objects, features, and advantages of the present invention will become clearer with reference to the accompanying drawings and each embodiment.

[First Embodiment]

  For the first embodiment of the present invention, reference is made to FIG. FIG. 1 is a diagram illustrating a portable terminal device and an altitude measurement system according to the first embodiment.

  This altitude measurement system 2 includes a mobile terminal device 4 as a positioning terminal which is an example of the mobile terminal device of the present invention, and this mobile terminal device 4 is connected to an external server 8 via a wireless communication base station 6. As a plurality of GPS satellites 10, for example, radio waves from three satellites 101, 102, 103 are received. The mobile terminal device 4 and the base station 6 are connected wirelessly, and the external server 8 is connected to the base station 6 via a network 12 such as a computer network. By including the mobile terminal device 4 and the base station 6 or the network 12, a wireless communication system 13 such as W-CDMA (Wideband-Code Division Multiple Access) and other mobile phone networks is configured. .

In the first embodiment, the atmospheric pressure value at the position of the portable terminal device 4 is obtained, the reference atmospheric pressure at the approximate position of the portable terminal device 4 is taken in from the outside, and the portable terminal device is obtained using these atmospheric pressure values and the reference atmospheric pressure. The altitude of the approximate position where 4 is present is calculated. Here, the reference atmospheric pressure is, for example, the sea level atmospheric pressure. Therefore, in order to determine the initial value of altitude information,
a) Barometric pressure value at the position of the mobile terminal device 4 b) Current reference atmospheric pressure (for example, sea level pressure) at the approximate position of the mobile terminal device 4
The two atmospheric pressure values are acquired. A difference between these two atmospheric pressure values is obtained, and an initial value of the altitude of the portable terminal device 4 is obtained from the difference using a height measurement formula described later. Here, the atmospheric pressure value a) is detected by the atmospheric pressure detection unit 24 of the mobile terminal device 4. Further, the reference atmospheric pressure of b) is determined based on atmospheric pressure information of an area where the mobile terminal device 4 exists, such as weather map information. The pressure value indicated by the contour line on the weather map is the sea level pressure. If the approximate position of the mobile terminal device 4 is known, the sea level pressure at the approximate position on the weather map can be set as the reference atmospheric pressure. Barometric pressure information such as weather map information is acquired from an external server 8 to which the mobile terminal device 4 distributes weather information. The approximate position of the mobile terminal device 4 may use the position of the base station 6 for wireless communication to which the mobile terminal device 4 is connected.

  In order to execute such processing, the mobile terminal device 4 includes a wireless communication unit 14, an atmospheric pressure information acquisition unit 16, an approximate position acquisition unit 18, a reference atmospheric pressure calculation unit 20, an atmospheric pressure information storage unit 22, and the above-described atmospheric pressure detection unit. 24, an altitude information calculation unit 26, an altitude information holding unit 28, and a positioning unit 30. These functional units may be configured by software of a computer, or may be configured to realize functions by hardware. The wireless communication unit 14 is a means for connecting to the wireless communication system 13, includes a first antenna 32, and transmits / receives various information to / from the external server 8 through the base station 6. The external server 8 distributes reference atmospheric pressure (for example, sea level atmospheric pressure) information, weather information, and the like at the approximate position of the mobile terminal device 4, and these information is provided to the mobile terminal device 4 through the base station 6.

  The atmospheric pressure information acquisition unit 16 is means for acquiring atmospheric pressure information from the external server 8 based on a request from the mobile terminal device 4 and acquires atmospheric pressure information from weather information notified from the external server 8 that is an external information source. It is an information acquisition part to perform. The atmospheric pressure information includes a set of position information and pressure values at a plurality of points, vector data representing isobaric lines that are weather map information, and the like. For example, the atmospheric pressure information acquisition unit 16 may be configured to acquire atmospheric pressure information in a predetermined state. Here, the predetermined state is, for example, a certain time interval such as every hour, a certain time such as 8 o'clock, 12 o'clock, 16 o'clock, or a change in the area where the mobile terminal device 4 exists, that is, due to movement. Barometric pressure information is acquired in response to a change in position. If such barometric pressure information is acquired according to time or position change, accurate altitude and positioning can be performed.

  The approximate position acquisition unit 18 is a means for acquiring the position of the base station 6 and is an information acquisition unit for acquiring the position of the base station 6 that is notified to the mobile terminal device 4 through the wireless communication system 13 that is an external information source. is there. In this embodiment, the position of the base station 6 in the area where the mobile terminal device 4 exists is the approximate position of the mobile terminal device 4.

  The reference atmospheric pressure calculation unit 20 is a means for calculating the reference atmospheric pressure at the approximate position of the mobile terminal device 4, and the atmospheric pressure information notified from the external server 8 and the outline of the mobile terminal device 4 acquired by the approximate position acquisition unit 18. It is a calculation part which calculates sea level atmospheric pressure as a standard atmospheric pressure of the rough position by position.

  The atmospheric pressure information storage unit 22 stores the acquired or calculated atmospheric pressure information, and stores the atmospheric pressure information acquired by the atmospheric pressure information acquisition unit 16 and the reference atmospheric pressure calculated by the reference atmospheric pressure calculation unit 20. Such storage of atmospheric pressure information contributes to shortening the procedure of arithmetic processing when performing altitude and positioning.

  In this embodiment, the atmospheric pressure detection unit 24 is installed in the mobile terminal device 4 and is a means for detecting the atmospheric pressure at the actual position of the mobile terminal device 4, and is configured by, for example, an atmospheric pressure sensor.

  The altitude information calculation unit 26 calculates the altitude at which the mobile terminal device 4 is present from the atmospheric pressure detected by the atmospheric pressure detection unit 24 and the reference atmospheric pressure calculated by the reference atmospheric pressure calculation unit 20 by a known altitude measurement formula. The altitude information as the calculation result is held in the altitude information holding unit 28. If the altitude information is held in the altitude information holding unit 28, this information can be quickly used for positioning and the like, which contributes to speeding up of the positioning process.

  The positioning unit 30 is a unit that acquires GPS information and performs positioning, and is a calculation unit that calculates the approximate position of the mobile terminal device 4 from the positioning information and the altitude information obtained by the altitude information calculation unit 26. is there. The positioning unit 30 includes a second antenna 34 that receives satellite radio waves from a plurality of GPS satellites 10 that are signal sources of external positioning information, and acquires and analyzes GPS information as positioning information from the received radio waves. At the same time, the positioning calculation is executed with reference to the altitude information.

  With such a configuration, the mobile terminal device 4 calculates the reference atmospheric pressure from the atmospheric pressure information and the approximate position. This reference atmospheric pressure can be obtained from position information and atmospheric pressure values at a plurality of points, for example. In this case, in order to obtain from the position information and the atmospheric pressure values of a plurality of points, for example, the atmospheric pressure value at the point closest to the approximate position of the mobile terminal device 4 is set as the reference atmospheric pressure, or the three atmospheric pressure values surrounding the approximate position Is calculated by interpolating the standard atmospheric pressure.

This altitude is obtained from a height measurement formula (National Astronomical Observatory edited by Maruzen Co., Ltd., “Science Chronology” 2006 edition), and this height measurement formula is as follows. Height h is
h = h _O + 0.0036610 × t _V × h _O [m] (1)
It is. Here, h _O = 18410.0 log ₁₀ (P _O / P) [m]
t _V : Average provisional temperature of air column [℃]
P _O = Sea level pressure [hPa]
P: Air pressure at the observation site [hPa]
It is. In addition, the average provisional temperature t _V in equation (1) is
t _V = t _h + (0.005 / 2) × h [° C.] (2)
Can be estimated. here,
t _h : Air temperature of observation site [℃]
It is. In Expression (1), 0.0036610 × t _V × h 2 _O is a correction term based on temperature. In this case, if the temperature t _V is unknown, h _O may be set to an altitude without correction.

So, if you don't use temperature for the calculation, ignore the correction term,
h = h _O
= 18410.0 log ₁₀ ( _PO / P) [m] (3)
It becomes.

  Next, FIG. 2 is a flowchart illustrating an example of a processing method of a measurement method or a measurement program such as an altitude according to the first embodiment.

  Atmospheric pressure is detected by the atmospheric pressure detection unit 24 installed in the mobile terminal device 4, and the atmospheric pressure information and the approximate position of the mobile terminal device 4 are acquired, and the atmospheric pressure information is stored in the atmospheric pressure information storage unit 22 (step S1). . When this measurement process is executed by a measurement program, a process of taking detection information of the atmospheric pressure detection unit 24 as calculation information is executed.

  A reference atmospheric pressure is calculated using the acquired approximate position and atmospheric pressure information, and the reference atmospheric pressure as the calculation result is stored in the atmospheric pressure information storage unit 22 (step S2). The altitude is calculated using the reference atmospheric pressure and the detected atmospheric pressure of the atmospheric pressure detecting unit 24, and the altitude information is held in the altitude information holding unit 28 (step S3). If only altitude information is required, the process can be completed at this stage. If the calculated altitude information is displayed on the display unit of the mobile terminal device 4, the user can recognize the altitude from the display content.

  When positioning is performed, the positioning unit 30 acquires GPS information from the GPS satellites 101, 102, and 103, and performs positioning calculation using the GPS information and altitude information that is the calculation result (step S4). This process is terminated. If the calculated positioning information is displayed on the display unit of the mobile terminal device 4, the user can recognize the orientation from the display content.

  As described above, in the positioning calculation, even if the GPS information of the GPS satellites 101, 102, and 103 is insufficient to obtain the altitude, the altitude is calculated on the mobile terminal device 4 side in this embodiment. Then, positioning can be performed using the calculation result.

  Therefore, even when the number of satellite radio waves that can be received is small, the positioning performance can be improved, the positioning time can be shortened, and the altitude can be calculated simply and accurately. In addition, even if the number of satellites that can receive satellite radio waves is small, the obtained altitude can be used for positioning, so positioning performance can be improved, and altitude information is calculated before actual positioning. If the reference atmospheric pressure information is prepared, the positioning time can be shortened. Moreover, since it is the structure which comprises the atmospheric | air pressure detection part 24 and prepares the measured atmospheric | air pressure value, shortening of positioning time is achieved.

  By the way, the change of altitude information is more dependent on the movement of the user than the atmospheric pressure information. For example, when the user moves 100 [m], for example, when going up a hill, an altitude difference of 10 [m] occurs on a daily basis, and the atmospheric pressure information is, for example, an atmospheric pressure at a distance of 100 [km]. Is considered to change by 4 [hPa], a pressure change of 0.004 [hPa] occurs at a distance of 100 [m]. Under standard atmospheric pressure, a pressure difference of 1 [hPa] corresponds to an altitude difference of about 8 [m], so a pressure difference of 0.004 [hPa] is an altitude difference of about 3 [cm]. Accordingly, the altitude change is more dependent on the movement of the user than on the pressure information.

  In addition, since the change in altitude is highly dependent on the movement of the user, the degree to which the change in the atmospheric pressure information affects the positioning is small even without recalculating the reference atmospheric pressure. Therefore, the effect of preparing the reference atmospheric pressure information and using the reference atmospheric pressure information is great.

  And since the altitude information calculated in advance and held in the altitude information holding unit 28 is used for the positioning calculation, the positioning calculation procedure can be shortened, the number of satellites can be complemented, and the positioning accuracy can be improved. .

  Here, regarding the positioning method, in relation to the number of satellites, two hyperboloids are determined in a three-dimensional space with two satellites, and two hyperboloids are obtained with three satellites. Further, another hyperboloid is added to the intersection line obtained by the four satellites and the intersection point is determined by the four satellites, whereby the position of the mobile terminal device 4 is determined. In this case, if the altitude of the mobile terminal device 4 is determined in advance for the relationship between positioning and altitude information, the position of the mobile terminal device 4 is obtained from the altitude information and the intersection of the two hyperboloids. Positioning is possible with three GPS satellites. There is a measurement error in this positioning method, and the error becomes large especially when the arrangement of the satellites is biased.

  Therefore, even if radio waves from four satellites are received, the exact position is not required. In order to reduce the positioning error, it is necessary not only to increase the number of satellites used for positioning, but also to pursue the calculation results so that the positioning error is reduced.

  The calculation result is pursued after increasing the number of satellites in order to reduce the error area in the three-dimensional space and obtain one point. At that time, if the altitude information is known in advance, the calculation result is driven on the two-dimensional plane, so that the positioning error can be reduced.

  Thus, even if radio waves from four or more satellites can be received, using the altitude information for the positioning calculation can reduce positioning errors, and the use of altitude information is extremely effective.

[Second Embodiment]

  Reference is made to FIG. 3 for a second embodiment of the present invention. FIG. 3 is a diagram showing an altitude measurement system according to the second embodiment. In FIG. 3, the same parts as those in FIG.

  In the second embodiment, instead of calculating the reference atmospheric pressure in the first embodiment, reference atmospheric pressure information is acquired from the external server 8, and altitude and positioning are calculated using the reference atmospheric pressure.

  Therefore, the external server 8 includes reference atmospheric pressure information corresponding to the approximate position of the mobile terminal device 4 and distributes the reference atmospheric pressure information to the mobile terminal device 4 as required.

  In addition, the mobile terminal device 4 includes a wireless communication unit 14, an approximate position acquisition unit 18, an atmospheric pressure information storage unit 22, an atmospheric pressure detection unit 24, an altitude information calculation unit 26, an altitude information holding unit 28, a reference atmospheric pressure request unit 40, an outline. A position transmission unit 42 and a reference atmospheric pressure information acquisition unit 44 are provided. In this embodiment, a notification confirmation operation unit 46 is also provided.

  The reference atmospheric pressure request unit 40 is means for requesting the external server 8 to provide reference atmospheric pressure information through the wireless communication unit 14 and notifies the external server 8 of the request command. The approximate position transmitting unit 42 is a means for transmitting the approximate position of the mobile terminal device 4, and the approximate position as position information indicating the moving position of the mobile terminal device 4 that stops or changes momentarily is transmitted through the base station 6 to the external server. 8 is notified. The external server 8 responds to the request of the reference atmospheric pressure requesting unit 40 and notifies the mobile terminal device 4 of the reference atmospheric pressure of the approximate position notified from the approximate position transmitting unit 42, for example, the sea level atmospheric pressure.

  The reference atmospheric pressure information acquisition unit 44 is means for acquiring reference atmospheric pressure information, and acquires reference atmospheric pressure information transmitted from the external server 8 to the mobile terminal device 4 via the wireless communication system 13. The acquired reference atmospheric pressure information is stored in the atmospheric pressure information storage unit 22.

  In the altitude information calculation unit 26 of this embodiment, the altitude at the approximate position of the mobile terminal device 4 is calculated by using the reference atmospheric pressure information provided from the external server 8 and the detected atmospheric pressure detected by the atmospheric pressure detection unit 24. To do. The altitude measurement formula (1) is used for this calculation.

  And in this 2nd Embodiment, the notification confirmation operation part 46 is a confirmation means whether to notify the rough position of the portable terminal device 4 outside, Comprising: About the calculation of height measurement or positioning, the external server 8 Confirm with the user as to whether or not to notify. By such confirmation, the risk of inadvertently knowing the location of the mobile terminal device 4 to a third party is avoided.

  In this embodiment, the mobile terminal device 4 is notified of the approximate position of the mobile terminal device 4 from the mobile terminal device 4 to the external server 8. However, the wireless communication system 13 is left to send the approximate position to the external server 8. Also good. In short, it is not necessary for the mobile terminal device 4 to know the approximate position, and the approximate position transmitting unit 42 may be configured to include approximate position transmission command issuing means for transmitting an approximate position transmission command to the wireless communication system 13. .

  Next, FIG. 4 is a flowchart illustrating an example of a processing method of a measurement method or a measurement program such as an altitude according to the second embodiment.

  Atmospheric pressure is detected by the atmospheric pressure detection unit 24 installed in the portable terminal device 4, and reference atmospheric pressure information is acquired, and the reference atmospheric pressure information is stored in the atmospheric pressure information storage unit 22 (step S11). Similarly, in this embodiment, when this measurement process is executed by a measurement program, a process for taking in the atmospheric pressure information detected by the atmospheric pressure detection unit 24 as a preparation for calculation is executed.

  The altitude is calculated using the acquired reference atmospheric pressure and the detected atmospheric pressure of the atmospheric pressure detection unit 24, and the altitude information is held in the altitude information holding unit 28 (step S12). If only the altitude information is necessary, the process may be completed at this stage. If the altitude information is displayed on the display unit of the mobile terminal device 4, the user can recognize the altitude from the display content. .

  When positioning is performed, the positioning unit 30 acquires GPS information from the GPS satellites 101, 102, and 103, and performs positioning calculation using the GPS information and altitude information that is the calculation result (step S13). This process is terminated.

  According to this embodiment, the GPS information of the GPS satellites 101, 102, and 103 is insufficient to obtain the altitude by referring to the altitude information obtained using the reference atmospheric pressure provided from the external server 8. However, the positioning calculation can be performed accurately.

  Further, the reference atmospheric pressure information acquisition unit 44 may be configured to acquire the reference atmospheric pressure information in a predetermined state, for example. Here, the predetermined state is, for example, a certain time interval such as every hour, a certain time such as 8 o'clock, 12 o'clock, 16 o'clock, or a change in the area where the mobile terminal device 4 exists, that is, due to movement. Reference pressure information is acquired in response to a change in position. If such reference atmospheric pressure information is acquired according to time or position change, accurate altitude and positioning can be performed. In addition, when performing the positioning calculation, the reference pressure or the information that is the basis of the reference pressure is already held, so that the positioning calculation procedure can be shortened.

[Third Embodiment]

  The third embodiment of the present invention will be described with reference to FIGS. 5 and 6 are diagrams showing an altitude measurement system according to the third embodiment. 5 and 6, the same parts as those in FIG. 1 or 3 are denoted by the same reference numerals.

  In this embodiment, altitude calculation is performed with reference to temperature information and / or humidity information acquired from the outside.

  In this case, as shown in FIGS. 5 and 6, the altitude measurement system 2 includes a temperature information acquisition unit 48 and a humidity information acquisition unit 50. In this case, the altitude measurement system 2 shown in FIG. 5 has a configuration in which the altitude measurement system 2 shown in FIG. 1 includes an air temperature information acquisition unit 48 and a humidity information acquisition unit 50, and the altitude measurement system shown in FIG. Reference numeral 2 denotes a configuration in which the temperature information acquisition unit 48 and the humidity information acquisition unit 50 are provided in the altitude measurement system 2 shown in FIG.

  The temperature information acquisition unit 48 is means for acquiring temperature information from the outside. In this case, the temperature information acquisition unit 48 acquires temperature information existing in the external server 8 through the wireless communication unit 14. Using the acquired air temperature information, the setting of “average provisional temperature of the air column” in the height measurement formula (1) can be made close to the current status, and the accuracy of altitude calculation can be improved.

  The humidity information acquisition unit 50 is a means for acquiring humidity information from the outside. In this case, the humidity information acquisition unit 50 acquires humidity information existing in the external server 8 through the wireless communication unit 14.

Therefore, when using the acquired temperature information, formula (2) should be substituted into formula (1) in the height measurement formula (1). That is,
h = h _O × (1 + a × t _h ) / (1−a × b × h _O ) [m] (4)
It becomes. Here, a = 0.0036610 and b = 0.0025.

That is, the derivation of h is as follows when a = 0.0036610 in equation (1):
h = h _O + a × t _V × h _O (5)
It becomes. In addition, if t _V is b = 0.005 / 2 = 0.0025 in equation (2),
t _V = t _h + b × h (6)
It becomes. So, if we substitute equation (6) into equation (5),
h = h _O + a × (t _h + b × h) × h _O
= H _O × (1 + a × t _h ) + a × b × h _O × h (7)
From this equation (7),
h × (1−a × b × h _O ) = h _O × (1 + a × t _h ) (8)
_{h = h O × (1 +} a × th) / (1-a × b × h O) ··· (9)
Is obtained, and the above-described equation (4) is obtained.

  If the temperature information is used in this way, the altitude value is corrected by the temperature, and more accurate altitude information can be obtained. If the positioning calculation is performed using the altitude information, the accurate positioning calculation can be performed.

  In this embodiment, both the temperature information and the humidity information are used, but the altitude information may be calculated using either one of them.

[Fourth Embodiment]

  A fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a diagram showing an altitude measurement system according to the fourth embodiment. In FIG. 7, the same parts as those in FIG.

  In the altitude measurement system 2 according to this embodiment, the atmospheric pressure value measured by the mobile terminal device 4 is transmitted to the external server 8, and the external server 8 performs processing in the mobile terminal device 4 according to the first embodiment. Similarly, the reference atmospheric pressure based on the approximate position where the mobile terminal device 4 exists is obtained, the altitude of the mobile terminal device 4 is calculated from the reference atmospheric pressure and the atmospheric pressure value transmitted from the mobile terminal device 4, and the altitude information is obtained from the mobile terminal. This is a configuration for transmitting to the device 4.

  Therefore, the mobile terminal device 4 includes a wireless communication unit 14, an atmospheric pressure detection unit 24, a positioning unit 30, an atmospheric pressure value transmission unit 52, and an altitude information acquisition unit 54.

  The atmospheric pressure detection unit 24 is installed in the mobile terminal device 4, detects the atmospheric pressure at the position of the mobile terminal device 4, and provides the atmospheric pressure value to the atmospheric pressure value transmission unit 52. The atmospheric pressure value transmission unit 52 transmits to the external server 8 through the wireless communication unit 14.

  The altitude information at the position of the mobile terminal device 4 obtained by the external server 8 is received through the wireless communication unit 14 and acquired by the altitude information acquiring unit 54. The acquired altitude information is held in the altitude information holding unit 28 and provided to the positioning calculation of the positioning unit 30. The positioning calculation of the positioning unit 30 is the same as that of the above-described embodiment.

  Next, FIG. 8 is a flowchart illustrating an example of a procedure for a measurement method or a measurement program for altitude or the like according to the fourth embodiment.

  The atmospheric pressure is detected by the atmospheric pressure detection unit 24 installed in the portable terminal device 4 (step S21). When this measurement process is executed by a measurement program, a process for taking in the atmospheric pressure information detected by the atmospheric pressure detection unit 24 as a preparation for calculation is executed.

  The detected atmospheric pressure value is transmitted from the atmospheric pressure value transmission unit 52 to the external server 8 through the wireless communication unit 14 (step S22), and the external server 8 uses the approximate position of the portable terminal device 4 and the atmospheric pressure value to determine the reference atmospheric pressure. The altitude is calculated using the reference atmospheric pressure and the atmospheric pressure detected by the atmospheric pressure detector 24, and the altitude information is transmitted from the external server 8 to the mobile terminal device 4.

  The mobile terminal device 4 acquires the altitude information transmitted from the external server 8 by the altitude information acquisition unit 54, and holds it in the altitude information holding unit 28 (step S23). If only altitude information is required, the process can be completed at this stage. If the acquired altitude information is displayed on the display unit of the mobile terminal device 4, the user can recognize the altitude from the display content.

  When positioning is performed, the positioning unit 30 acquires GPS information from the GPS satellites 101, 102, and 103 and performs positioning calculation using the altitude information acquired from the external server 8 (step S24). End the process. If the calculated positioning information is displayed on the display unit of the mobile terminal device 4, the user can recognize the orientation from the display content.

  Also in this embodiment, in the positioning calculation, accurate positioning can be performed by calculation even when the GPS information of the GPS satellites 101, 102, 103 is insufficient to obtain the altitude.

[Other Embodiments]

  Other embodiments are listed and described.

  (1) When GPS positioning is performed, assist information necessary for performing positioning calculation may be obtained from the external server 8 by the mobile terminal device 4 and used. That is, if the atmospheric pressure information is acquired together with the assist information, the reference atmospheric pressure or the information that is the basis of the reference atmospheric pressure is already held when the positioning is performed, so that the procedure for performing the positioning can be shortened.

  (2) With the configuration using weather forecast information, for example, if the information on the current atmospheric pressure arrangement and the atmospheric pressure arrangement after 4 hours is acquired as a forecast, for example, after 4 hours, even after 4 hours, The accuracy of altitude calculation can be improved without newly acquiring barometric pressure information.

  (3) Future information acquired as a weather forecast may not be used when the approximate position of the mobile terminal device 4 changes more than a certain level. For example, assume that after acquiring weather forecast information, the aircraft traveled 1000 km. In such a situation, the reference atmospheric pressure at the position of the mobile terminal device 4 may change greatly, so if the change in the approximate position is, for example, 50 [km] or more, the atmospheric pressure information obtained as a forecast is not used. Shall. The fixed value of the approximate position change may be set in advance as a fixed value, or may be set short when the atmospheric pressure gradient of the atmospheric pressure information is strong and long when the atmospheric pressure gradient is slow.

  (4) The portable terminal device 4 is equipped with a temperature sensor, and it is possible to use the temperature measured by the temperature sensor, and the temperature measured by other means is taken into the portable terminal device 4 or the like for altitude calculation. Can be used. In general, even if a temperature sensor is mounted on the mobile terminal device 4, it is accurate due to the heat generated by the circuit of the mobile terminal device 4 and the body temperature when the mobile terminal device 4 is worn or held by hand. It is expected that temperature measurement is difficult. In order to solve this, if a temperature sensor is externally attached to the portable terminal device 4, accurate temperature measurement can be performed. Alternatively, by using a thermometer as a device different from the mobile terminal device 4, the user may input the detected temperature value into the mobile terminal device 4. With such a configuration, the temperature can be used for altitude calculation without acquiring temperature information from the external server 8.

(5) In the above embodiment, the mobile terminal device 4 has been described. The mobile terminal device 4 includes a mobile phone, a personal digital assistant (PDA) having a communication function, a personal computer in addition to a mobile phone. It includes various devices such as game machines and cameras.

  Next, FIG. 9 is referred about an Example. FIG. 9 is a diagram illustrating an example of an altitude measurement system. 9, the same parts as those in FIG. 1 are denoted by the same reference numerals.

  In the mobile terminal device 4 of each of the above embodiments, functional blocks configured by hardware or software are described. Therefore, in this example, the mobile terminal device 4 has the functions of the above embodiment. As a configuration executed by computer processing, a wireless communication unit 14, a CPU (Central Processing Unit) 60, a recording unit 62, a GPS unit 64, an atmospheric pressure sensor 66, an operation input unit 68, and a display unit 70 are provided as arithmetic processing units. .

  The wireless communication unit 14 includes an antenna 32, is controlled by the CPU 60, communicates with the external server 8 through the base station 6, and receives and transmits information wirelessly.

  The CPU 60 executes an OS (Operating System) in the recording unit 62 and an altitude measurement program as an application program, and controls each functional unit to execute various processes such as fetching, discharging, recording, and displaying various information. To do.

  The recording unit 62 is a recording medium that stores various information in a readable manner, and includes a program recording unit 72, a data recording unit 74, and a RAM (Random-Access Memory) 76, and the reference atmospheric pressure calculation unit 20 according to the above embodiment. The altitude information calculation unit 26, the calculation unit of the positioning unit 30, the notification confirmation operation unit 46, and the like are configured.

  The program recording unit 72 stores various application programs such as an OS and an altitude measurement program.

  The data recording unit 74 is a recording unit for various types of information, and constitutes an information storage unit such as an atmospheric pressure information storage unit 22, an altitude information storage unit 28, a calculation result storage unit of the positioning unit 30, and a detected atmospheric pressure storage unit.

  In the RAM 76, application programs such as an OS and an altitude measurement program are developed, and a work area such as various information acquisition units and various information calculation units is configured.

  The GPS unit 64 includes the antenna 34 and corresponds to the positioning unit 30 of the above embodiment that receives the distribution of GPS information from the GPS satellites 101, 102, and 103.

  The atmospheric pressure sensor 66 corresponds to the atmospheric pressure detection unit 24 of the above-described embodiment, and is installed in the mobile terminal device 4 to acquire atmospheric pressure information at the approximate position of the mobile terminal device 4.

  The operation input unit 68 is a user interface and is used for inputting and selecting various information. The display unit 70 is a display unit for various types of information, and is composed of an LCD (Liquid Crystal Display), and displays calculated altitude information, positioning information, a screen for selecting whether or not to transmit the approximate position, and the like.

  In this case, the base station 6 is connected to a weather information server 80, which is an external server 8, via a W-CDMA network 78 as a network 12, and the weather information server 80 bases weather map information such as atmospheric pressure information, temperature information, and humidity information. The data is distributed to the mobile terminal device 4 through the station 6. The weather information server 80, which is the external server 8, may be configured to execute altitude calculation instead of the mobile terminal device 4 (fourth embodiment).

  Then, for example, as shown in FIG. 10, the mobile terminal device 4 includes first and second housing portions 84 and 86 in the housing 82 and is configured to be foldable with a hinge portion 88. The operation input unit 68 composed of a plurality of keys and the display unit 70 and the antennas 32 and 34 may be incorporated in the housing unit 86.

  Further, for example, the external server 8 includes a communication unit 90, a processor 92, and a recording unit 94 as shown in FIG. The communication unit 90 is means for communicating with the network 12, and exchanges information with the mobile terminal device 4 through the base station 6. The processor 92 includes a CPU and the like, and executes an OS and application programs in the recording unit 94. The recording unit 94 includes a program recording unit 96, a data recording unit 98, and a RAM 100. The program recording unit 96 stores the OS and application programs described above. When the altitude calculation of the mobile terminal device 4 is executed by the external server 8, the altitude measurement program described above may be stored in the program recording unit 96.

  The data recording unit 98 may store weather information such as weather map information such as atmospheric pressure information, temperature information, and humidity information, and may store general position information of the mobile terminal device 4. The RAM 100 is used as a work area when executing the OS and various programs.

  Next, the processing procedure in this embodiment will be described with reference to FIG. FIG. 12 is a flowchart showing an example of altitude calculation and positioning calculation of the altitude measurement program.

  In this processing procedure, distribution information of an information distribution service such as i-channel (provided by NTT DOCOMO) is updated, weather map information is acquired from the weather information server 80 (step S31), and area information is acquired ( In step S32), the latitude and longitude of the approximate position where the mobile terminal device 4 exists is calculated from the area data file (step S33). With reference to the weather map information, the sea level pressure is calculated from the latitude and longitude of the approximate position described above (step S34).

  After such calculation, it is determined whether or not the approximate position update timing is reached (step S35). If the approximate position update timing has arrived (YES in step S35), the process returns to step S32, and steps S32 to S34. If the update timing has not arrived (NO in step S35), it is determined whether or not the distribution information update timing has arrived (step S36), and the distribution information update timing has arrived. If so (YES in step S36), the process returns to step S31, and the processes of steps S31 to S34 are executed.

  After such determination processing, it is determined whether or not positioning is to be performed (step S37). If positioning is not to be performed (NO in step S37), the processing of steps S35 and S36 is performed to wait and positioning is performed. When carrying out (YES in step S37), the sensor value is acquired from the atmospheric pressure sensor 66 (step S38), and the altitude of the portable terminal device 4 is calculated from the sea level atmospheric pressure and the sensor value of the atmospheric pressure sensor 66 (step S39). Using the calculated altitude of the mobile terminal device 4, GPS positioning is performed (step S40), and the process returns to step S31.

  In such processing, as the sea level pressure information at the point of the mobile terminal device 4, for example, as shown in FIGS. 13 and 14, if the mobile terminal device 4 exists in the area surrounded by the points P11, P12, P21, P22, 1015 [hPa] obtained by averaging the atmospheric pressures at the points P11, P12, P21, and P22 is set as the sea level atmospheric pressure at the position of the mobile terminal device 4.

  Further, when the isobaric line is described by a beige curve, the isobaric line information is obtained as shown in FIG. 15, for example, and P1, P2, P3, and P4 are control points of the beige curve.

  Next, the processing procedure in this embodiment will be described with reference to FIG. FIG. 16 is a flowchart showing another example of altitude calculation and positioning calculation of the altitude measurement program.

  In this processing procedure, area information is acquired (step S51), the area code obtained from the area information is transmitted to the weather information server 80 (step S52), and the sea level pressure of the area is received from the weather information server 80 (step S52). S53). The weather information server 80 that has received the area code from the portable terminal device 4 executes processing F for transmitting the sea level pressure at the position corresponding to the transmitted area code to the portable terminal device 4.

  After such processing, it is determined whether or not it is time to update the sea level pressure (step S54). If the update timing has arrived (YES in step S54), the process returns to step S51, and the processing in steps S51 to S53 is performed. If the update timing has not arrived (NO in step S54), it is determined whether or not positioning is performed (step S55). If positioning is not performed (NO in step S55), steps S54 and S55 are performed. When performing the above process and waiting and performing positioning (YES in step S55), the sensor value is acquired from the atmospheric pressure sensor 66 (step S56), and the mobile terminal device 4 is obtained from the sea level atmospheric pressure and the sensor value of the atmospheric pressure sensor 66. Is calculated (step S57). Using the calculated altitude of the mobile terminal device 4, GPS positioning is performed (step S58), and the process returns to step S51.

  Next, a processing procedure in this embodiment will be described with reference to FIG. FIG. 17 is a flowchart showing another example of altitude calculation and positioning calculation of the altitude measurement program.

  This processing procedure shows processing in which the mobile terminal device 4 and the weather information server 80 take into account the cooperative relationship through the W-CDMA network 78 which is a mobile phone network.

  In the processing procedure of the portable terminal device 4, the weather information server 80 is requested to transmit the sea level pressure at the approximate position (step S61), and the sea level pressure at the approximate position is received from the weather information server 80 (step S62).

  After such processing, it is determined whether or not it is time to update the sea level pressure (step S63). If the update timing has arrived (YES in step S63), the process returns to step S61, and the processing in steps S61 and S62 is performed. If the update timing has not arrived (NO in step S63), it is determined whether or not positioning is performed (step S64). If positioning is not performed (NO in step S64), steps S63 and S64 are performed. In the case of performing the above process and waiting and performing positioning (YES in step S64), the sensor value is acquired from the atmospheric pressure sensor 66 (step S65), and the mobile terminal device 4 is obtained from the sea level atmospheric pressure and the sensor value of the atmospheric pressure sensor 66. Is calculated (step S66). Using the calculated altitude of the mobile terminal device 4, GPS positioning is performed (step S67), and the process returns to step S61.

  Corresponding to the processing procedure on the portable terminal device 4 side, in the processing procedure of the weather information server 80, a request for transmitting the sea level pressure is received from the portable terminal device 4 (step S71), and the approximate position is set to the W-CDMA network 78. (Step S72), the approximate position of the mobile terminal device 4 is acquired from the W-CDMA network 78 (step S73), and the sea level pressure corresponding to the approximate position is transmitted to the mobile terminal device 4 (step S74). .

  With such a processing procedure, the altitude calculation and the positioning calculation executed in each of the above-described embodiments can be realized by computer processing.

  Regarding this processing procedure, when confirming with the user whether the distribution of the approximate position is possible from the mobile terminal device 4, for example, as shown in FIG. 18, the confirmation screen 102 is displayed on the display unit 70 of the mobile terminal device 4. That's fine.

In the confirmation screen 102, the title bar 104, the content display unit 106, and the like are displayed, the title bar 104 clearly indicates “position information”, and the content display unit 106 displays information such as the positioning date and time and the current location. For example, an inquiry message
“Do you want to notify the external server of location information?”
Is displayed, and “YES” button 108 and “NO” button 110 are displayed as dialog buttons in the lower column, the user can select whether or not to transmit position information to external server 8 using the cursor key. it can. The portable terminal device 4 refers to such selection information, and transmits or rejects the position information.

  With such a configuration, position information that is personal information can be protected without inadvertently notifying position information.

  Next, technical ideas extracted from the embodiments of the present invention described above are listed as appendices according to the description format of the claims. The technical idea according to the present invention can be grasped by various levels and variations from a superordinate concept to a subordinate concept, and the present invention is not limited to the following supplementary notes.

(Appendix 1) A mobile terminal device having a communication function,
An information acquisition unit for acquiring approximate position information representing the approximate position of the mobile terminal device from the outside using the communication function, and atmospheric pressure information;
An atmospheric pressure detector for detecting atmospheric pressure at the position of the mobile terminal device;
An operation for calculating a reference atmospheric pressure of the approximate position of the mobile terminal device using the atmospheric pressure information and the approximate position information, and calculating an altitude of the approximate position using the detected atmospheric pressure of the atmospheric pressure detection unit and the reference atmospheric pressure. And
A portable terminal device comprising:

(Supplementary note 2) In the mobile terminal device of Supplementary note 1,
A portable terminal device comprising a positioning unit that performs positioning and performing positioning using positioning information acquired from an external signal source by the positioning unit and altitude information calculated by the calculation unit.

(Supplementary Note 3) In the mobile terminal device of Supplementary Note 1,
The atmospheric pressure information acquired by the information acquisition unit includes positional information and atmospheric pressure values of a plurality of points,
The mobile terminal device, wherein the calculation unit selects a pressure value at a point closest to the approximate position as a reference pressure, or calculates the reference pressure from pressure values at a plurality of points close to the approximate position.

(Supplementary Note 4) In the mobile terminal device of Supplementary Note 1,
The atmospheric pressure information acquired by the information acquisition unit includes vector data representing an isobaric line or the vector data, and the arithmetic unit develops the vector data in an isobaric diagram, and calculates the atmospheric pressure value at a point closest to the approximate position as the reference A portable terminal device used for atmospheric pressure.

(Appendix 5) A mobile terminal device having a communication function,
An information acquisition unit that acquires the approximate position information representing the approximate position of the mobile terminal device, the atmospheric pressure information, and the reference atmospheric pressure information indicating the reference atmospheric pressure of the approximate position from the outside using the communication function;
An atmospheric pressure detector for detecting atmospheric pressure at the position of the mobile terminal device;
A calculation unit that calculates an altitude of the approximate position using the atmospheric pressure detected by the atmospheric pressure detection unit and the reference atmospheric pressure acquired by the information acquisition unit;
A portable terminal device comprising:

(Appendix 6) In the mobile terminal device of Appendix 1 or Appendix 5,
A portable terminal device comprising: a positioning unit that calculates a position of the portable terminal device using positioning information acquired from an external signal source and altitude information calculated by the calculation unit.

(Appendix 7) In the mobile terminal device of Appendix 5,
A portable terminal device comprising: a request unit that requests distribution of the reference atmospheric pressure to an external server that distributes the reference atmospheric pressure related to a position where the portable terminal device exists.

(Appendix 8) In the mobile terminal device of Appendix 7,
A portable terminal device comprising: a confirmation operation unit that confirms transmission of the approximate position to the external server.

(Supplementary note 9) In the mobile terminal device of Supplementary note 1 or Supplementary note 5,
The mobile terminal device, wherein the atmospheric pressure information or the reference atmospheric pressure information is acquired at a constant time interval or time according to movement of an area where the mobile terminal device exists.

(Supplementary note 10) In the mobile terminal device of Supplementary note 1 or Supplementary note 5,
A portable terminal device comprising a storage unit for storing the acquired atmospheric pressure information or the reference atmospheric pressure information.

(Appendix 11) In the mobile terminal device of Appendix 1,
A portable terminal device comprising: a storage unit that stores the positioning information acquired from the outside by the information acquisition unit, the atmospheric pressure information, or the reference atmospheric pressure information.

(Supplementary note 12) In the mobile terminal device of Supplementary note 1 or Supplementary note 5,
The information acquisition unit acquires the temperature information from an external server that distributes temperature information, and the calculation unit uses the temperature information, the atmospheric pressure detected by the atmospheric pressure detection unit, and the reference atmospheric pressure to A portable terminal device that calculates information.

(Supplementary note 13) In the mobile terminal device of Supplementary note 1 or Supplementary note 5,
The information acquisition unit acquires the humidity information from an external server that distributes humidity information,
The mobile terminal device, wherein the calculation unit calculates altitude information by using the humidity information, the air temperature information, the atmospheric pressure detected by the atmospheric pressure detection unit, and the reference atmospheric pressure.

(Supplementary note 14) In the mobile terminal device of Supplementary note 1, Supplementary note 2 or Supplementary note 5,
A portable terminal device comprising information holding means for holding altitude information calculated by the calculation unit.

(Supplementary note 15) In the mobile terminal device of Supplementary note 1, Supplementary note 2 or Supplementary note 5,
The information acquisition unit acquires, from an external server that distributes atmospheric pressure information or reference atmospheric pressure, current atmospheric pressure information or reference atmospheric pressure, and atmospheric pressure information or reference atmospheric pressure at a certain time in the future together with time information indicating the acquisition time point, Save these information in the information storage unit,
The mobile unit uses the air pressure information or the reference air pressure at the time closest to the time for calculating the positioning when performing the positioning after the time when the air pressure information or the reference air pressure is acquired. apparatus.

(Supplementary Note 16) In the mobile terminal device of Supplementary Note 15,
The information stored in the information storage unit is not used when the position of the mobile terminal device changes by more than a certain width from the approximate position, or is acquired again and updated. The portable terminal device characterized by this.

(Supplementary Note 17) A mobile terminal device having a communication function,
An atmospheric pressure detection unit for detecting atmospheric pressure;
A transmission unit that transmits the atmospheric pressure value detected by the atmospheric pressure detection unit to an external server;
An information acquisition unit for acquiring altitude information of the mobile terminal device calculated by the external server using the atmospheric pressure value transmitted from the transmission unit;
A portable terminal device comprising:

(Additional remark 18) It is measuring methods, such as the altitude of a portable terminal device provided with a communication function,
Detecting atmospheric pressure at the position of the mobile terminal device;
Calculating a reference atmospheric pressure at the approximate position of the mobile terminal device using the atmospheric pressure information and the approximate position information acquired by the mobile terminal device;
Calculating an altitude of the approximate position of the mobile terminal device using the reference atmospheric pressure and the atmospheric pressure detected at the position of the mobile terminal device;
A method for measuring the altitude or the like of a mobile terminal device, comprising:

(Supplementary note 19) A method for measuring the altitude of a portable terminal device having a communication function,
Detecting atmospheric pressure at the position of the mobile terminal device;
Obtaining a reference atmospheric pressure at the approximate position of the mobile terminal device from outside;
Calculating an altitude of the approximate position of the mobile terminal device using the reference atmospheric pressure and the atmospheric pressure detected at the position of the mobile terminal device;
A method for measuring the altitude or the like of a mobile terminal device, comprising:

(Supplementary note 20) In the measurement method of altitude etc. of the mobile terminal device of supplementary note 18 or supplementary note 19,
Measurement of mobile terminal device altitude, etc., including the step of acquiring positioning information acquired from an external signal source and calculating positioning using this positioning information and altitude information obtained by the calculation Method.

(Supplementary note 21) A measurement program such as altitude of a portable terminal device having a communication function, which is executed by a computer,
Capturing atmospheric pressure detected at the position of the mobile terminal device;
Calculating a reference atmospheric pressure at the approximate position of the mobile terminal device using the atmospheric pressure information and the approximate position information acquired by the mobile terminal device;
Calculating an altitude of the approximate position of the mobile terminal device using the reference atmospheric pressure and the atmospheric pressure detected at the position of the mobile terminal device;
A measurement program for altitude of a portable terminal device, and the like.

(Additional remark 22) It is a measurement program of the altitude etc. of the portable terminal device provided with a communication function performed by computer,
Capturing atmospheric pressure detected at the position of the mobile terminal device;
Obtaining a reference atmospheric pressure at the approximate position of the mobile terminal device from outside;
Calculating an altitude of the approximate position of the mobile terminal device using the reference atmospheric pressure and the atmospheric pressure detected at the position of the mobile terminal device;
A measurement program for altitude of a portable terminal device, and the like.

(Supplementary Note 23) In the measurement program such as the altitude of the mobile terminal device of Supplementary Note 21 or Supplementary Note 22,
Measurement of mobile terminal device altitude, etc., including the step of acquiring positioning information acquired from an external signal source and calculating positioning using this positioning information and altitude information obtained by the calculation program.

(Supplementary Note 24) A recording medium in which a measurement program such as altitude of a mobile terminal device having a communication function, which is executed by a computer, is stored in a readable manner in the computer,
Capturing atmospheric pressure detected at the position of the mobile terminal device;
Calculating a reference atmospheric pressure at the approximate position of the mobile terminal device using the atmospheric pressure information and the approximate position information acquired by the mobile terminal device;
Calculating an altitude of the approximate position of the mobile terminal device using the reference atmospheric pressure and the atmospheric pressure detected at the position of the mobile terminal device;
A recording medium storing a measurement program including a computer-readable program.

(Supplementary Note 25) A recording medium in which a measurement program such as altitude of a mobile terminal device having a communication function, which is executed by a computer, is stored in a readable manner in the computer,
Capturing atmospheric pressure detected at the position of the mobile terminal device;
Obtaining a reference atmospheric pressure at the approximate position of the mobile terminal device from outside;
Calculating an altitude of the approximate position of the mobile terminal device using the reference atmospheric pressure and the atmospheric pressure detected at the position of the mobile terminal device;
A recording medium storing a measurement program including a computer-readable program.

(Supplementary Note 26) In the recording medium of Supplementary Note 24 or Supplementary Note 25,
Obtaining positioning information acquired from an external signal source, and storing a measurement program including a step of calculating positioning using this positioning information and altitude information obtained by the calculation in a computer readable manner Recording medium

As described above, the most preferable embodiment and the like of the present invention have been described. However, the present invention is not limited to the above description, and is described in the claims or disclosed in the specification. It goes without saying that various modifications and changes can be made by those skilled in the art based on the above gist, and such modifications and changes are included in the scope of the present invention.

The present invention relates to a portable terminal device, its altitude measurement method, its measurement program, and a recording medium storing the measurement program, and relates to positioning using satellite radio waves, and the number of satellites that can receive satellite radio waves is Even when the number is small, the positioning performance can be improved, the positioning process can be simplified, and the altitude value can be easily calculated with high accuracy.

It is a figure which shows the portable terminal device and altitude etc. measurement system which concern on 1st Embodiment. It is a flowchart which shows an example of measurement methods and measurement programs, such as an altitude. It is a figure which shows the portable terminal device and altitude measurement system which concern on 2nd Embodiment. It is a flowchart which shows an example of measurement methods and measurement programs, such as an altitude. It is a figure which shows the portable terminal device and altitude etc. measuring system which concern on 3rd Embodiment. It is a figure which shows the portable terminal device and altitude etc. measuring system which concern on 3rd Embodiment. It is a figure which shows the portable terminal device and altitude etc. measuring system which concern on 4th Embodiment. It is a flowchart which shows an example of measurement methods and measurement programs, such as an altitude. It is a figure which shows the Example of a portable terminal device and an altitude measurement system. It is a figure which shows an example of a portable terminal device. It is a figure which shows an example of an external server. It is a flowchart which shows an example of the measurement methods, such as an altitude, and the process sequence of a measurement program. It is a figure which shows an example about the position of a portable terminal device. It is a figure which shows an example of sea level atmospheric pressure information. It is a figure which shows an example of isobar information. It is a flowchart which shows the other example of the measurement methods, such as an altitude, and the process sequence of a measurement program. It is a flowchart which shows the other example of the measurement methods, such as an altitude, and the process sequence of a measurement program. It is a figure which shows the confirmation screen of the display part of a portable terminal device.

Explanation of symbols

2 altitude measurement system 4 portable terminal device 8 external server 10 GPS satellite 14 wireless communication unit 16 atmospheric pressure information acquisition unit 20 reference atmospheric pressure calculation unit 24 atmospheric pressure detection unit 26 altitude information calculation unit 28 altitude information holding unit 30 positioning unit 44 reference atmospheric pressure information Acquisition unit 62 Recording unit 66 Barometric pressure sensor

Claims (7)

A mobile terminal device having a communication function,
An information acquisition unit for acquiring approximate position information representing the approximate position of the mobile terminal device from the outside using the communication function, and atmospheric pressure information;
An atmospheric pressure detector for detecting atmospheric pressure at the position of the mobile terminal device;
An operation for calculating a reference atmospheric pressure of the approximate position of the mobile terminal device using the atmospheric pressure information and the approximate position information, and calculating an altitude of the approximate position using the detected atmospheric pressure of the atmospheric pressure detection unit and the reference atmospheric pressure. And
A portable terminal device comprising: The mobile terminal device according to claim 1,
A portable terminal device comprising a positioning unit that performs positioning and performing positioning using positioning information acquired from an external signal source by the positioning unit and altitude information calculated by the calculation unit. The mobile terminal device according to claim 1,
The atmospheric pressure information acquired by the information acquisition unit includes positional information and atmospheric pressure values of a plurality of points,
The mobile terminal device, wherein the calculation unit selects a pressure value at a point closest to the approximate position as a reference pressure, or calculates the reference pressure from pressure values at a plurality of points close to the approximate position. The mobile terminal device according to claim 1,
The atmospheric pressure information acquired by the information acquisition unit includes vector data representing an isobaric line or the vector data, and the arithmetic unit develops the vector data in an isobaric diagram, and calculates the atmospheric pressure value at a point closest to the approximate position as the reference A portable terminal device used for atmospheric pressure. A method for measuring the altitude of a mobile terminal device having a communication function,
Detecting atmospheric pressure at the position of the mobile terminal device;
Calculating a reference atmospheric pressure at the approximate position of the mobile terminal device using the atmospheric pressure information and the approximate position information acquired by the mobile terminal device;
Calculating an altitude of the approximate position of the mobile terminal device using the reference atmospheric pressure and the atmospheric pressure detected at the position of the mobile terminal device;
A method for measuring the altitude or the like of a mobile terminal device, comprising: A measurement program such as altitude of a portable terminal device having a communication function, which is executed by a computer,
Capturing atmospheric pressure detected at the position of the mobile terminal device;
Calculating a reference atmospheric pressure at the approximate position of the mobile terminal device using the atmospheric pressure information and the approximate position information acquired by the mobile terminal device;
Calculating an altitude of the approximate position of the mobile terminal device using the reference atmospheric pressure and the atmospheric pressure detected at the position of the mobile terminal device;
A measurement program for altitude of a portable terminal device, and the like. A recording medium in which a measurement program such as altitude of a portable terminal device having a communication function executed by a computer is stored so as to be readable by the computer,
Capturing atmospheric pressure detected at the position of the mobile terminal device;
Calculating a reference atmospheric pressure at the approximate position of the mobile terminal device using the atmospheric pressure information and the approximate position information acquired by the mobile terminal device;
Calculating an altitude of the approximate position of the mobile terminal device using the reference atmospheric pressure and the atmospheric pressure detected at the position of the mobile terminal device;
A recording medium storing a measurement program including a computer-readable program.

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