JP2013072668A - Atmospheric pressure measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an atmospheric pressure measuring apparatus capable of easily acquiring atmospheric pressure data in consideration of altitude information.SOLUTION: An atmospheric pressure measuring apparatus includes: atmospheric pressure measuring means for intermittently measuring an atmospheric pressure; receiving means for receiving altitude data at a position where the atmospheric pressure is measured from a GPS positioning device; and correcting means for acquiring corrected atmospheric pressure data for which a value of the atmospheric pressure measured by the atmospheric pressure measuring means is corrected to be a value of the atmospheric pressure at a prescribed altitude on the basis of the altitude data received in the receiving means.

Description

  The present invention relates to an atmospheric pressure measurement device that acquires an atmospheric pressure value considering movement in an altitude direction.

  Conventionally, there is a portable electronic device having a function of measuring atmospheric pressure. This portable electronic device has a function of displaying the measured atmospheric pressure or displaying a temporal change in atmospheric pressure as a graph.

  Some of such portable electronic devices have not only the display of the atmospheric pressure itself, but also the function of predicting and displaying the weather change based on the temporal change of the atmospheric pressure. When acquiring the time change of the atmospheric pressure in such a portable electronic device, if the influence of the pressure change accompanying the change in position, particularly the change in the altitude direction is included, it is possible to accurately obtain the time change of the atmospheric pressure. I can't. Therefore, conventionally, in order to remove the influence of the altitude change on the atmospheric pressure, the measured atmospheric pressure is corrected to a value of 0 m above sea level based on altitude data manually input using a switch. The time change was acquired (for example, patent document 1).

Utility Model Registration No. 2563055

  However, it is very troublesome for the user to input altitude data that changes every time during the movement. Further, if the altitude measurement or input is neglected, there is a problem that the component of the altitude change cannot be corrected from the measured atmospheric pressure, and the time change of the atmospheric pressure cannot be accurately estimated.

  An object of the present invention is to provide a barometric pressure measuring device that can easily acquire barometric pressure data considering altitude information.

In order to achieve the above object, the present invention
Atmospheric pressure measuring means for intermittently measuring atmospheric pressure;
Receiving means for receiving altitude data at the atmospheric pressure measurement position from a GPS positioning device;
Correction means for obtaining corrected atmospheric pressure data obtained by correcting the atmospheric pressure value measured by the atmospheric pressure measurement means to the atmospheric pressure value at a predetermined altitude based on the altitude data received by the receiving means. It is an atmospheric pressure measuring device.

  According to the present invention, there is an effect that it is possible to easily obtain barometric pressure data considering altitude information.

It is a figure which shows the whole structure of the atmospheric | air pressure display system containing the electronic timepiece which is embodiment of the atmospheric pressure measuring apparatus of this invention. It is a block diagram which shows the internal structure of an electronic timepiece. It is a block diagram which shows the internal structure of a smart phone. It is a figure explaining the display part of an electronic timepiece. It is a figure which shows the example of the weather forecast which can be displayed on a display part. It is a chart which shows the example of an atmospheric pressure amendment table. It is a flowchart which shows the control procedure of an atmospheric | air pressure correction value calculation process. It is a flowchart which shows the control procedure of a weather forecast process. It is a flowchart which shows the control procedure of an atmospheric | air pressure change display process.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is an overall configuration diagram of a barometric pressure display system according to a first embodiment of the present invention.

  The atmospheric pressure display system 1 of the present embodiment includes an electronic timepiece 40 as an atmospheric pressure measurement device and a smartphone 10 as a GPS positioning device. The electronic timepiece 40 is a wristwatch type that includes a watch body and a band and can be worn on the wrist. Both the electronic timepiece 40 and the smartphone 10 have a short-range wireless communication function, and can perform mutual communication by, for example, Bluetooth communication (registered trademark: Bluetooth).

  FIG. 2 is a block diagram showing the internal configuration of the electronic timepiece 40. FIG. 3 is a block diagram showing the internal configuration of the smartphone 10.

  As shown in FIG. 2, the electronic timepiece 40 includes a CPU (Central Processing Unit) 41 (correction means, weather forecast means), a ROM (Read Only Memory) 42, a RAM (Random Access Memory) 43, and an operation unit 44. A clock circuit 45, a display unit 46 (display unit), a driver 47 that controls the display unit 46, an antenna AN4, a Bluetooth module 48 (reception unit) and a UART (Universal Asynchronous Receiver Transmitter) 49, and a vibration motor 50 and its driver 51, LED (light emitting diode) 52 and its driver 53, piezo element 54 and its driver 55, pressure sensor 56 (atmospheric pressure measuring means) and A / D conversion circuit 57, CPU 41 and each part A bus 58 for exchanging signals between them is provided.

  The CPU 41 performs control over the entire operation of the electronic timepiece 40 and various arithmetic processes. The CPU 41 causes the display unit 46 to display the time based on the current time counted by the timer circuit 45. Further, the CPU 41 corrects the atmospheric pressure acquired by the pressure sensor 56 based on the altitude data acquired from the smartphone 10 via the Bluetooth module 48, and the weather forecast and the atmospheric pressure obtained by the change in the corrected atmospheric pressure. A time change graph is displayed on the display unit 46.

  The ROM 42 stores various programs executed by the CPU 41 and initial setting data. The data stored in the ROM 42 includes an atmospheric pressure correction program 421, a weather forecast program 422, and a model atmospheric pressure table 423. When the CPU 41 executes the weather forecast program 422, necessary data is acquired and calculated in the electronic timepiece 40 to forecast the weather, and the weather forecast result is displayed.

  The RAM 43 provides a working memory space to the CPU 41. The RAM 43 includes an atmospheric pressure history storage unit 431 (storage means), and stores atmospheric pressure data calculated within a predetermined period in association with time data.

  The operation unit 44 includes one or a plurality of button switches, converts them into input signals based on operations performed by the user on the switches, and outputs the input signals to the CPU 11. Alternatively, the operation unit 44 may be a touch panel.

  The timer circuit 45 is a counter that counts and holds the current time. The current time is read and displayed on the display unit 46, or the current time data is compared with the set time data related to various functions, and various operations are performed.

  The display unit 46 is, for example, a segment display type LCD (liquid crystal display). A driver 47 (liquid crystal driver) is operated by a control signal sent from the CPU 41, and the LCD is driven to display a specified content such as a current time, a setting state, or a menu of various functions. The display unit 46 may be another display unit, for example, an organic ELD (Electro-Luminescent Display), and the driver 47 is appropriately selected depending on the type of the display unit 46.

  The Bluetooth module 48 is a control module for performing Bluetooth communication with an external device via the antenna AN4. The transmission data sent from the CPU 41 is subjected to processing such as serial / parallel conversion by the UART 49 and is sent from the Bluetooth module 48 to the external device. The received data received from the external device using the Bluetooth module 48 is subjected to processing such as serial / parallel conversion by the UART 49 and is output to the CPU 41.

  The vibration motor 50, LED (light emitting diode) 52, and piezo element (PZT) 54 are for notifying the user by emitting vibration, light, and buzzer sound. When a control signal is sent from the CPU 41 to each of the drivers 51, 53, and 55, the drivers 51, 53, and 55 convert the voltage signals necessary for operating the vibration motor 50, the LED 52, and the piezo element 54, respectively, and output them. To do.

  As shown in FIG. 3, the smartphone 10 includes a CPU 11, a ROM 12, a RAM 13, a storage unit 14, an operation unit 15, a built-in clock 16, a display unit 17 and its driver 18, a speaker 19, and a microphone 20. A codec 21, an RF transmission / reception circuit 22, an RF transmission / reception antenna AN11, a communication circuit 23, a Bluetooth module 24, a UART 25, a Bluetooth communication transmission / reception antenna AN12, a GPS data reception processing unit 26, A GPS data receiving antenna AN13, a bus 27 for connecting the CPU 11 and each unit, and the like are provided.

  The CPU 11 performs overall control of the overall operation of the smartphone 10 and various arithmetic processes. Further, the CPU 11 sends a control signal to the Bluetooth module 24 based on setting information by an input operation to the operation unit 15 to cause the electronic timepiece 40 to send GPS positioning information (altitude data).

  The ROM 12 stores various programs executed by the CPU 11 and initial setting data. The RAM 13 provides a work memory space to the CPU 11 and stores temporary work data.

  The storage unit 14 is a non-volatile readable / writable memory, for example, a flash memory or an EEPROM (Electrically Erasable and Programmable Read Only Memory). The storage unit 14 stores, for example, various application programs executed by the smartphone 10 and stored data and setting data related to various functions.

  The operation unit 15 detects an operation input of the touch panel, converts the operation content input by the user based on the menu displayed on the display unit 17 into an electrical signal, and outputs the electrical signal to the CPU 11 as an input signal. Alternatively, the operation unit 15 may include a configuration in which a plurality of operation keys are provided and an input signal converted into an electric signal based on an operation performed by the user on the key is output to the CPU 11.

  The built-in clock 16 is a counter that counts and holds the current time. This current time is read and displayed on the display unit 17. Further, the present time data and the set time data related to various functions are compared, and various operations are performed. The current time data of the internal clock 16 is corrected at any time during communication with the mobile base station by the RF transceiver circuit 22.

  The display unit 17 is, for example, an LCD (liquid crystal display). A driver 18 (liquid crystal driver) is operated by a control signal sent from the CPU 11 and drives the LCD to display various functions of the smartphone 10. The display unit 17 may be based on other methods, for example, an organic ELD (Electro-Luminescent Display), and the driver 18 is appropriately selected depending on the display method. Further, the display unit 17 displays a menu for allowing the user to perform an input operation as a touch panel.

  The speaker 19 converts an electrical signal into an audio signal based on a signal from the codec 21 and outputs audio. The microphone 20 detects sound waves, converts them into electric signals, and outputs them to the codec 21. The codec 21 decodes the encoded and compressed digital audio signal and sends it as an analog signal to the speaker 19, and encodes the audio signal acquired from the microphone 20 and outputs it to the CPU 11 and the communication circuit 23. Note that a speaker for calling and a speaker for outputting sound to the outside may be provided separately.

  The RF transmission / reception circuit 22 performs transmission / reception processing of packet communication such as telephone communication and mail performed with the mobile base station using the RF transmission / reception antenna AN11. The communication circuit 23 performs various processes of transmission / reception data transmitted / received by the RF transmission / reception circuit 22, and exchanges data with the CPU 11 and the codec 21.

  The Bluetooth module 24 is a control module for performing Bluetooth communication with other electronic devices such as the electronic timepiece 40 via the antenna AN12. The transmission data sent from the CPU 11 is subjected to processing such as serial / parallel conversion by the UART 25 and is sent from the Bluetooth module 24 to another electronic device. Received data received from another electronic device using the Bluetooth module 24 is subjected to processing such as parallel / serial conversion by the UART 25 and is output to the CPU 11.

  The GPS data reception processing unit 26 demodulates and decodes the satellite signal received from the GPS positioning satellite via the antenna AN13, converts it into time data and position data, and outputs it to the CPU 11 in a predetermined format. As a predetermined output format, for example, NMEA (National Marine Electronics Association) -0183 is used.

  FIG. 4 is a diagram showing a display pattern by segments of the display unit 46 of the electronic timepiece 40. FIG. 5 is a diagram illustrating an example of a weather graphic displayed on the second display unit 462 of the display unit 46.

  On the display screen 46a of the display unit 46, display by the segment method is performed. As shown in FIG. 4, on the display screen 46 a of the display unit 46, a first display unit 461 that displays numbers and characters such as time, and a second type that displays symbols and figures of preset types related to the weather forecast. A display portion 462 is provided. As shown in FIG. 5, the second display unit 462 appropriately controls lighting or extinguishing of each segment, so that (a) clear (weather is good), (b) clear cloudy (weather recovers), It is possible to display weather forecasts such as (c) rainy and cloudy (weather weather) and (d) rain (weather gets worse).

  Next, the atmospheric pressure correction process in the electronic timepiece 40 as the atmospheric pressure measurement device of the present embodiment will be described.

  The atmospheric pressure is a pressure due to gravity applied to the atmosphere, and is obtained by integrating the mass of the atmosphere existing above the point where the atmospheric pressure is measured. The atmospheric pressure distribution in the vertical direction indicates that the atmosphere is approximately stationary (hydrostatic pressure equilibrium), and represents the change in the atmospheric pressure P with respect to the altitude z by the equation of motion in the vertical direction and the equation of state of the gas. A mathematical formula is obtained.

For example, it is expressed by the following formula (1) as one of the models of the atmospheric pressure altitude distribution.
P = P ₀ exp (−mg / (kT) (z−z ₀ )) (1)
Here, the temperature T [° C.] is expressed by the following formula (2) in the troposphere using a standard atmospheric model.
T = 15.0-0.0065z (2)
Further, the gravitational acceleration g on the ground surface, the average mass m per molecule of the atmosphere, and the Boltzmann constant k are constants.

Also, the altitude coefficient z _{0 is set} to zero. That is, the altitude z is equal to the altitude (average above sea level) from the average sea level. At this time, the atmospheric pressure coefficient P ₀ represents the atmospheric pressure at the sea level altitude z = 0 (sea level). Therefore, the coefficient P ₀ , that is, the atmospheric pressure at 0 m above sea level can be calculated using the altitude z acquired by the GPS data reception processing unit 26 and the atmospheric pressure P measured by the pressure sensor 56.

  For such an altitude distribution of atmospheric pressure, models with higher accuracy have been formulated by various institutions. In the electronic timepiece 40 as the atmospheric pressure measurement device of the present embodiment, instead of calculating the exponential function in Equation (1), the atmospheric pressure based on any model is acquired in advance for each predetermined altitude difference and held in a table. In addition, the atmospheric pressure difference between the altitude measured by performing linear interpolation using these atmospheric pressure values and the sea level is calculated, and the atmospheric pressure measurement value is corrected. A table indicating each value used for this approximation is stored in advance in the ROM 42 as a model atmospheric pressure table 423. Alternatively, this correction table may be held in the atmospheric pressure correction program 421.

  FIG. 6 is a chart showing changes in atmospheric pressure associated with differences in altitude of standard atmosphere.

In the international standard atmosphere (ISO2533: 1975), the atmospheric pressure P ₀ at sea level is set to 1013.3 hPa, the model atmospheric pressure every 200 m, and the average rate of change of atmospheric pressure in each section every 200 m. Are shown in association with altitude data. That is, the atmospheric pressure of the standard atmosphere at an altitude of 200 m is 989.5 hPa, and the average change rate of the atmospheric pressure in the section of the altitude of 0 m to 200 m is 0.119 hPa / m. Similarly, it is shown that the model atmospheric pressure and the average rate of change at each altitude such as 400 m and 600 m decrease exponentially as shown in the equation (1).

  FIG. 7 is a flowchart showing the control procedure of the atmospheric pressure correction value calculation process executed by the CPU 41.

  This atmospheric pressure correction value calculation process is called after the atmospheric pressure measurement value PA and the altitude value H at the position where the atmospheric pressure measurement value PA is acquired.

When the atmospheric pressure correction value calculation process is started, the CPU 41 acquires the atmospheric pressure change rate dP in the section including the altitude value H (step S171). Next, the CPU 41 acquires the atmospheric pressure value PL at the lower limit altitude HL in the section including the altitude value H (step S172). Then, the CPU 41 calculates the atmospheric pressure correction value Y (step S173). Specifically, the CPU 41 determines the difference between the atmospheric pressure value PL and the standard atmospheric pressure 1013.3 hPa at the sea level, the difference between the lower altitude HL and the altitude value H (H-HL), and the atmospheric pressure change rate dP. Based on this, the atmospheric pressure correction value Y is calculated by the following mathematical formula (3).
Y = (1013.3−PL) + (H−HL) × dP (3)
Then, the CPU 41 ends the atmospheric pressure correction value calculation process.

  FIG. 8 is a flowchart showing a control procedure of the weather forecast process executed by the CPU 41 of the electronic timepiece 40 as the atmospheric pressure measurement device of the present embodiment.

  This weather forecast process is a process that is automatically called and performed every hour.

  When the weather forecast process is started, the CPU 41 first acquires the atmospheric pressure measurement value PA input from the pressure sensor 56 via the A / D conversion circuit 57 (step S11). Next, the CPU 41 determines whether or not a communication link is established with the smartphone 10 by Bluetooth (step S12). If it is determined that a Bluetooth communication link has been established, the processing of the CPU 41 proceeds directly to step S15. If it is determined that a Bluetooth communication link has not been established, the CPU 41 performs link processing for establishing a Bluetooth communication link with the smartphone 10 (step S13). Then, the CPU 41 determines whether or not the link has been successfully established (step S14). If it is determined that the link has not been successfully established, the process of the CPU 41 proceeds to step S20. If it is determined that the link has been successfully established, the process of the CPU 41 proceeds to step S15.

  When the process of the CPU 41 proceeds to step S15, the CPU 41 requests the smartphone 10 to transmit altitude data by GPS positioning. Then, the CPU 41 waits for data transmission from the smartphone 10. CPU41 discriminate | determines whether the altitude value H acquired by the GPS positioning from the smart phone 10 was received (step S16). If it is determined that the altitude value H has not been received, the CPU 41 determines whether or not a predetermined time has elapsed since the transmission of altitude data was requested (step S17). If it is determined that the predetermined time has not elapsed, the CPU 41 returns the processing step to step S16 and continues to wait for data reception of the altitude value H. On the other hand, if it is determined that the predetermined time has elapsed, the CPU 41 determines that it is impossible to acquire altitude data, and advances the process to step S20. In the process of step S <b> 20, the CPU 41 reads out the atmospheric pressure correction value Y calculated when the previous weather forecast process was performed from the atmospheric pressure history storage unit 431. And the process of CPU41 transfers to the process of step S21.

  When it is determined in step S16 that the altitude value H has been received from the smartphone 10, the CPU 41 invokes and executes the above-described pressure correction value calculation process (step S18). Further, the CPU 41 acquires the calculated atmospheric pressure correction value Y and stores it in the atmospheric pressure history storage unit 431 (step S19). Then, the process of the CPU 41 proceeds to step S21.

  In the process of step S21, the CPU 41 calculates the corrected atmospheric pressure value PB by adding the acquired atmospheric pressure correction value Y to the atmospheric pressure measurement value PA acquired in the process of step S11. Then, the CPU 41 stores the corrected atmospheric pressure value PB for 24 hours in the atmospheric pressure history storage unit 431 (step S22). That is, the corrected atmospheric pressure value PB acquired this time is additionally stored in the atmospheric pressure history storage unit 431, and the corrected atmospheric pressure value PB acquired more than 24 hours ago is deleted. The CPU 41 calculates an average value Pav of the corrected atmospheric pressure values PB for 24 hours stored in the atmospheric pressure history storage unit 431 (step S23). Then, the CPU 41 calculates a deviation ΔP = PB−Pav from the average value Pav of the corrected atmospheric pressure value PB acquired this time (step S24).

  Next, the CPU 41 determines whether or not the calculated pressure difference ΔP is 3 hPa or more (step S25). When it is determined that the pressure difference ΔP is 3 hPa or more, the CPU 41 performs a sunny forecast (step S26). The weather forecast process ends. If it is determined that the pressure difference ΔP is not 3 hPa or more, the CPU 41 then determines whether the pressure difference ΔP is 0 hPa or more (step S27). When it is determined that the pressure difference ΔP is equal to or greater than 0 hPa, the CPU 41 performs a clear cloudy forecast (step S28) and ends the weather forecast process. If it is determined that the pressure difference ΔP is not equal to or greater than 0 hPa, the CPU 41 further determines whether or not the pressure difference ΔP is equal to or greater than −3 hPa (step S29). When it is determined that the pressure difference ΔP is −3 hPa or more, the CPU 41 performs a rain cloudy forecast (step S30), and ends the weather forecast process. On the other hand, if it is determined that the pressure difference ΔP is not greater than −3 hPa, the CPU 41 makes a rain forecast (step S31) and ends the weather forecast process.

  Here, the weather forecasts performed in steps S26, S28, S30, and S31 may be automatically displayed on the second display unit 462 of the display screen 46a, or only stored in the RAM 43, so that the user It may be read and displayed when requested based on the instruction. When the weather forecast is automatically displayed on the second display unit 462, the user may be notified using the vibration motor 50, the LED 52, the piezo element 54, or the like.

[Modification]
In the above embodiment, for the purpose of simplifying the calculation, the corrected atmospheric pressure value PB is obtained by simply adding the obtained atmospheric pressure correction value Y to the atmospheric pressure measurement value PA. This is based on the rate of change in atmospheric pressure when the atmospheric pressure at altitude is 1013.3 hPa. Therefore, when the atmospheric pressure at the sea level is different from this atmospheric pressure, the atmospheric pressure change rate also changes. As shown in the equation (1), at the same altitude z, the atmospheric pressure P ₀ -Y acquired when the atmospheric pressure at the sea level is 1013.3 hPa = P ₀ and the sea level The atmospheric pressure acquired when the atmospheric pressure is an atmospheric pressure value (corrected atmospheric pressure value) PB different from the standard atmospheric pressure P ₀ , that is, the ratio with the atmospheric pressure measurement value PA is the atmospheric pressures P ₀ and PB at sea level. Is equal to the ratio of Therefore, the corrected atmospheric pressure value PB can be obtained by the following equation (4).
PB = P ₀ / (P ₀ −Y) × PA (4)
Therefore, equation (4) can be applied when calculating the corrected atmospheric pressure value PB in step S21 in the weather forecast process of FIG.

[Second Embodiment]
Next, the atmospheric pressure measuring apparatus according to the second embodiment will be described. The configuration of the barometric pressure measuring apparatus according to the second embodiment is the same except that the display screen 46a of the display unit 46 is a dot matrix type liquid crystal display unit, and the description is omitted because the same reference numerals are used. .

  In the electronic timepiece 40 as the barometric pressure measuring device of the second embodiment, the weather forecast display related to the weather forecast process is added to the second display unit 462 by performing a dot matrix type liquid crystal display, and the calculated corrected barometric pressure value PB is calculated. A graph can be displayed.

  FIG. 9 is a flowchart showing a control procedure of the atmospheric pressure change display process executed by the CPU 41.

  The atmospheric pressure measurement process shown in FIG. 9 is the same as the control procedure of the weather forecast process shown in FIG. 8, each process from step S11 to S20, and step S22. Omitted. Moreover, in the process of step S21a, either the process of step S21 of 1st Embodiment or the process of step S21 of the modification 1 can be applied.

  When the process of step S22 is completed, the CPU 41 displays the change in the corrected atmospheric pressure value PB for 24 hours stored in the atmospheric pressure history storage unit 431 as a graph on the second display unit 462 (step S41). At this time, the vertical width of the graph may be fixed at a center of 1013.3 hPa, or may be variably set based on the maximum value and the minimum value of the corrected atmospheric pressure value PB for 24 hours. . When the process of step S41 ends, the CPU 41 ends the atmospheric pressure history display process.

  As described above, according to the electronic timepiece 40 as the atmospheric pressure measuring apparatus of the first embodiment and the second embodiment, the pressure sensor 56 and the Bluetooth module 48 are provided, and the atmospheric pressure data is obtained using the pressure sensor 56 at every hour. , And communicates with the smartphone 10 via the Bluetooth module 48 to acquire altitude data at the current location acquired by the GPS data reception processing unit 26 of the smartphone 10, and the barometric pressure measurement value is obtained based on the altitude data. Since the atmospheric pressure at the sea level is corrected, it is possible to easily and accurately know the time change of the atmospheric pressure considering the altitude change even during movement accompanied by altitude change.

  Further, by obtaining only the time change of the atmospheric pressure, the weather forecast can be performed more accurately.

  Further, by displaying the time change of the atmospheric pressure in a graph, the user can easily know the change of the atmospheric pressure accompanying the change of the weather.

  In addition, since the altitude data is acquired from the smartphone 10 using Bluetooth communication, it is possible to save the user from manually inputting the altitude data acquired by an external device such as the smartphone 10 and easily obtain accurate altitude data. It is possible to acquire the time change of the atmospheric pressure by using it.

  Further, since the altitude data is acquired from the smartphone 10, the size, weight, and power consumption of the electronic watch 40 can be obtained by utilizing the functions installed in the smartphone 10 as compared with the case where the GPS positioning is performed by the electronic watch 40 itself. Can be suppressed.

  In particular, since the atmospheric pressure corrected to the atmospheric pressure is calculated and displayed, the user can easily estimate the weather situation based on the atmospheric pressure value.

  In addition, since the atmospheric pressure is corrected using the international standard atmospheric model, it is simple only by the relationship between the atmospheric pressure at sea level and the atmospheric pressure at the altitude indicated in the altitude data acquired from the smartphone 10. The atmospheric pressure can be corrected by simple calculation.

  In addition, since there is equivalent information in the model atmospheric pressure table 423 in which the model atmospheric pressure based on the international standard atmospheric model is stored at intervals of 200 m or in the atmospheric pressure correction program 421, the atmospheric pressure can be calculated simply by linear interpolation. The measured value can be corrected.

  In addition, since the atmospheric pressure is measured every hour on the hour and the corrected atmospheric pressure data is acquired, a more accurate weather forecast can be provided to the user based on the corrected atmospheric pressure data without unevenness. In particular, since the weather forecast is performed based on the latest deviation of the corrected atmospheric pressure from the average value of the corrected atmospheric pressure data without unevenness, the weather forecast is not based on the atmospheric pressure data biased in a specific period.

  In addition, the corrected atmospheric pressure data necessary for the weather forecast is ensured by storing the corrected atmospheric pressure data for the latest 24 hours in the atmospheric pressure history storage unit 431, and the corrected atmospheric pressure graph displayed on the second display unit 462. It is easy to see and can be displayed appropriately.

  Further, since the weather forecast is performed based on the latest deviation of the corrected pressure value from the average value of the corrected pressure values for 24 hours, the tendency of the change in pressure can be more accurately obtained by using the corrected pressure data, and the weather forecast. Accuracy can be improved.

The present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, in the above-described embodiment, the atmospheric pressure data is acquired every other hour. For example, it may be every 30 minutes or may be acquired irregularly depending on the situation. In addition, if it is acquired irregularly, the weighted average is used when used for weather forecasting, or the data for obtaining the average value of atmospheric pressure is thinned by limiting to the hourly data, for example Also good.

  Further, in the above embodiment, the atmospheric pressure is corrected to the atmospheric pressure at the sea level, but the correction altitude is arbitrarily set, for example, the correction is performed by unifying the atmospheric pressure at the sea level of the user's residence. I can do it. In this case, a correction atmospheric pressure at a set altitude can be easily obtained and displayed by calculating a correction coefficient for the altitude in advance and storing it in the RAM 43.

  Moreover, in the said embodiment, although international standard atmosphere was used as model atmospheric pressure, it is not restricted to this. For example, the model atmospheric pressure of ICAO (International Civil Aviation Organization) may be used, or the altitude distribution at the time of a typhoon is corrected independently, or the temperature setting is changed between summer and winter. It is also good.

In the above embodiment, the atmospheric pressure PL and the atmospheric pressure change rate dP of each section are stored in the model atmospheric pressure table 423. However, the standard sea level atmospheric pressure of the atmospheric pressure at the altitude HL is used instead of the atmospheric pressure PL. it is also possible to hold the shift value _P 0 -PL with P _0.

  Moreover, although Bluetooth communication was used in the said embodiment, as a communication means, it is not restricted to this. For example, other short-range wireless communication means such as infrared communication, ZIGBEE (registered trademark), or UWB (Ultra Wide Band) may be used.

  Moreover, although the smart phone 10 was mentioned as a GPS positioning apparatus, it is good also as using other portable electronic devices, such as a mobile phone. In addition, although the electronic timepiece 40 is described as the barometric pressure measuring device, a pedometer or a sphygmomanometer may be used. In addition to the wristwatch as the electronic timepiece 40, the barometric pressure measuring device of the present invention includes a watch that can be lowered from the neck, a watch that can be clipped to clothes, a watch that can be temporarily fixed to the handle of a bicycle or motorcycle, etc. The present invention can also be applied to various types of watches that are portable and easily visible.

  In addition, the period for storing the corrected atmospheric pressure data in the atmospheric pressure history storage unit 431, the period used for weather forecasting, and the period for displaying the graph can be changed as appropriate. Moreover, it is good also as switching arbitrarily by the operation to the operation part 44 by a user.

Moreover, the method of performing a weather forecast is not restricted to the method of the said 1st Embodiment. For example, the forecast may be performed based on other criteria or a plurality of criteria such as the trend of atmospheric pressure change for the last 24 hours or the introduction of criteria based on the absolute value of the corrected atmospheric pressure value PB.
In addition, the detailed configuration, numerical values, processing order, and the like shown in the above embodiment can be changed as appropriate without departing from the spirit of the present invention.

Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and equivalents thereof.
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.

[Appendix]
<Claim 1>
Atmospheric pressure measuring means for intermittently measuring atmospheric pressure;
Receiving means for receiving altitude data at the atmospheric pressure measurement position from a GPS positioning device;
Correction means for obtaining corrected atmospheric pressure data obtained by correcting the atmospheric pressure value measured by the atmospheric pressure measurement means to the atmospheric pressure value at a predetermined altitude based on the altitude data received by the receiving means. Barometric pressure measuring device.
<Claim 2>
Storage means for storing a plurality of corrected atmospheric pressure data acquired by the correction means;
Weather forecasting means for performing a weather forecast based on the corrected atmospheric pressure data stored in the storage means;
The barometric pressure measuring apparatus according to claim 1, further comprising display means for displaying a weather forecast by the weather forecast means.
<Claim 3>
Storage means for storing a plurality of corrected atmospheric pressure data acquired by the correction means;
The barometric pressure measuring apparatus according to claim 1, further comprising: a display unit that displays all or a part of the corrected barometric pressure data stored in the storage unit as a graph.
<Claim 4>
The atmospheric pressure measuring device according to any one of claims 1 to 3, wherein the correction means acquires corrected atmospheric pressure data at sea level.
<Claim 5>
The correction means calculates a model atmospheric pressure at an altitude indicated by altitude data received by the receiving means based on a predetermined model, and measures the atmospheric pressure at the altitude and sea level atmospheric pressure based on the model and the atmospheric pressure measurement. The corrected atmospheric pressure data is acquired based on the value of the atmospheric pressure measured by the means. The atmospheric pressure measuring device according to any one of claims 1 to 4, wherein the atmospheric pressure data is acquired.
<Claim 6>
A correction table storing model atmospheric pressure determined at predetermined altitude intervals based on the predetermined model;
The correction means calculates the model atmospheric pressure at the altitude indicated by the altitude data received by the receiving means by linear interpolation using the model atmospheric pressure at two adjacent altitudes stored in the correction table. The atmospheric pressure measurement device according to claim 5.
<Claim 7>
The atmospheric pressure measurement device according to any one of claims 1 to 6, wherein the atmospheric pressure measurement unit acquires atmospheric pressure data at every hour.
<Claim 8>
The atmospheric pressure measurement device according to claim 2, wherein the storage unit stores corrected atmospheric pressure data based on an atmospheric pressure measured up to a predetermined time before the current time.
<Claim 9>
The weather forecasting means is based on the difference between the atmospheric pressure related to the corrected atmospheric pressure data acquired most recently and the average value of the atmospheric pressure related to all corrected atmospheric pressure data stored in the storage means, or The atmospheric pressure measuring device according to claim 2 or 8, wherein a deterioration tendency is determined.

1 Atmospheric pressure display system 10 Smartphone 11 CPU
12 ROM
13 RAM
14 storage unit 15 operation unit 16 built-in clock 17 display unit 18 driver 19 speaker 20 microphone 21 codec 22 RF transmission / reception circuit 23 communication circuit 24 Bluetooth module 25 UART
26 GPS data reception processor 27 Bus 40 Electronic clock 41 CPU
42 ROM
421 Atmospheric pressure correction program 422 Weather forecast program 423 Model atmospheric pressure table 43 RAM
431 Atmospheric pressure history storage unit 44 Operation unit 45 Timing circuit 46 Display unit 46a Display screen 461 First display unit 462 Second display unit 47 Driver 48 Bluetooth module 49 UART
50 Vibration motor 51 Driver 52 LED
53 Driver 54 Piezo element 55 Driver 56 Pressure sensor 57 A / D conversion circuit 58 Bus AN11, AN12, AN13, AN4 Antenna

Claims (9)

Atmospheric pressure measuring means for intermittently measuring atmospheric pressure;
Receiving means for receiving altitude data at the atmospheric pressure measurement position from a GPS positioning device;
Correction means for obtaining corrected atmospheric pressure data obtained by correcting the atmospheric pressure value measured by the atmospheric pressure measurement means to the atmospheric pressure value at a predetermined altitude based on the altitude data received by the receiving means. Barometric pressure measuring device. Storage means for storing a plurality of corrected atmospheric pressure data acquired by the correction means;
Weather forecasting means for performing a weather forecast based on the corrected atmospheric pressure data stored in the storage means;
The barometric pressure measuring apparatus according to claim 1, further comprising display means for displaying a weather forecast by the weather forecast means. Storage means for storing a plurality of corrected atmospheric pressure data acquired by the correction means;
The barometric pressure measuring apparatus according to claim 1, further comprising: a display unit that displays all or a part of the corrected barometric pressure data stored in the storage unit as a graph. The atmospheric pressure measuring device according to any one of claims 1 to 3, wherein the correction means acquires corrected atmospheric pressure data at sea level. The correction means calculates a model atmospheric pressure at an altitude indicated by altitude data received by the receiving means based on a predetermined model, and measures the atmospheric pressure at the altitude and sea level atmospheric pressure based on the model and the atmospheric pressure measurement. The corrected atmospheric pressure data is acquired based on the value of the atmospheric pressure measured by the means. The atmospheric pressure measuring device according to any one of claims 1 to 4, wherein the atmospheric pressure data is acquired. A correction table storing model atmospheric pressure determined at predetermined altitude intervals based on the predetermined model;
The correction means calculates the model atmospheric pressure at the altitude indicated by the altitude data received by the receiving means by linear interpolation using the model atmospheric pressure at two adjacent altitudes stored in the correction table. The atmospheric pressure measurement device according to claim 5. The atmospheric pressure measurement device according to any one of claims 1 to 6, wherein the atmospheric pressure measurement unit acquires atmospheric pressure data at every hour. The atmospheric pressure measurement device according to claim 2, wherein the storage unit stores corrected atmospheric pressure data based on an atmospheric pressure measured up to a predetermined time before the current time. The weather forecasting means is based on the difference between the atmospheric pressure related to the corrected atmospheric pressure data acquired most recently and the average value of the atmospheric pressure related to all corrected atmospheric pressure data stored in the storage means, or The atmospheric pressure measuring device according to claim 2 or 8, wherein a deterioration tendency is determined.

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