JP3461273B2 - Reference barometric pressure correction device for barometric altimeter, reference barometric pressure correction method, and recording medium recording the method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reference air pressure calibrating device for a barometric altimeter mounted on an aircraft or the like, a method for calibrating the reference air pressure, and a recording medium recording the method.

[0002]

2. Description of the Related Art Conventionally, a barometric altimeter has been widely used as a means for knowing the altitude in, for example, an aircraft. This barometric altimeter is a device that measures the altitude by utilizing the fact that the atmospheric pressure decreases as the altitude rises above sea level.It measures the altitude when the atmospheric pressure changes due to factors other than altitude change, such as changes in atmospheric pressure distribution. There is an error in the value. Therefore, at the time of use, the atmospheric pressure data around the flight path of the aircraft is obtained, and the reference atmospheric pressure is calibrated.

By the way, the means for transmitting information when an aircraft obtains atmospheric pressure data is exclusively by wireless communication. Therefore, if a failure occurs in the communication system, accurate data cannot be obtained and the reference atmospheric pressure cannot be calibrated. Further, on the aircraft, the data received by the operator is recorded, and the correction data is given to the barometric altimeter by manual input operation. Therefore, mistakes are likely to occur due to human factors.

[0004]

As described above, in the prior art, when correcting the reference atmospheric pressure of the barometric altimeter, there are many uncertain factors when obtaining the atmospheric pressure data, and a more reliable correction of the reference atmospheric pressure is provided. A method proposal was awaited.

The present invention has been made under the above circumstances.
An object thereof is to provide a reference air pressure calibrating device of a barometric altimeter capable of reducing uncertainties when transmitting and receiving atmospheric pressure data and more reliably calibrating the reference air pressure, a reference air pressure calibrating method and a recording medium recording the method. Especially.

[0006]

In order to achieve the above-mentioned object, a reference atmospheric pressure calibrating device for a barometric altimeter of the present invention is a reference atmospheric pressure calibrating device for a barometric altimeter mounted on a flying vehicle, and at least the above An atmospheric pressure information storage unit for storing and storing the atmospheric pressure information of a range covering the flight path of the flying object, and a position information calculation section for obtaining the position of the flying object in the range covering the flight path of the flying object. And a reference atmospheric pressure calculation unit that obtains atmospheric pressure information at the position of the flying object obtained by the position information calculation unit based on the stored contents of the atmospheric pressure information storage unit, and atmospheric pressure information obtained by the reference atmospheric pressure calculation unit. And a reference atmospheric pressure calibrating means for calibrating the reference atmospheric pressure of the barometric altimeter.

The reference pressure correction method according to the present invention is a reference pressure correction method for a barometric altimeter mounted on a flying object, and creates a database of atmospheric pressure information of at least a range covering the flight path of the flying object. A first step of storing this database in a storage means; a second step of obtaining the position of the flying object in a range covering the flight path of the flying object; and a database stored in the storage means. The third step of determining the atmospheric pressure information at the position of the flying object obtained in the second step, and the calibration of the reference atmospheric pressure of the barometric altimeter using the atmospheric pressure information obtained in the third step as the reference atmospheric pressure. It is characterized by comprising a fourth step of performing.

A recording medium recording the reference atmospheric pressure correcting method of the present invention is a recording medium recording a program for executing the reference atmospheric pressure correcting method of a barometric altimeter mounted and used on a flying object, and at least A database of atmospheric pressure information of a range covering the flight path of the flying object, a means for storing the database in a storage means, a means for obtaining the position of the flying object in the range covering the flight path of the flying object, A program that executes means for determining atmospheric pressure information at the position of the flying object based on a database stored in storage means, and means for calibrating the reference atmospheric pressure of the barometric altimeter using this atmospheric pressure information as reference atmospheric pressure. It is supposed to be recorded.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a reference atmospheric pressure calibrating device according to an embodiment of the present invention, which is used for calibrating a barometric altimeter mounted on, for example, an aircraft. In FIG. 1, reference numeral 1 is a position data calculation unit, for example, GPS (Global Positioning System).
The position of an aircraft in flight is determined by a navigation device such as m). Reference numeral 2 denotes an atmospheric pressure arrangement database unit, which is provided with a data reading means such as a scanner, and the atmospheric pressure data in the range shown in the weather chart (atmospheric pressure arrangement chart) 5 as shown in FIG. The association and the bitmap information are stored in a storage unit (not shown) such as a RAM.

Reference numeral 3 is a reference pressure calculation unit for barometric altimeter,
The position data of the aircraft determined by the position data calculation unit 1 is taken in, the pressure data corresponding to this position data is read from the pressure distribution database unit 2, and the reference pressure of the barometric altimeter 4 is corrected based on this pressure data. is there.

The operation of the reference atmospheric pressure configuration device having the above-mentioned configuration will be described with reference to the data flow chart of FIG. 3 and the flow chart of FIG. First, in the preparatory stage before flight of an aircraft, the atmospheric pressure arrangement database unit 2 creates a database of the latest weather map (atmospheric pressure arrangement map) 5 on the day of flight (step STa).

Next, in the mid-flight stage, the position data calculation unit 1 periodically determines the position of the aircraft and sends the position data of the aircraft to the barometric altimeter reference pressure calculation unit 3 (step STb). When receiving this position data,
The barometric altimeter reference atmospheric pressure calculation unit 3 sends the position data to the atmospheric pressure arrangement database unit 2 and reads out the atmospheric pressure data corresponding to the position data of the aircraft from the atmospheric pressure arrangement database unit 2 (step STc). When this barometric pressure data is received, the barometric altimeter reference barometric pressure calculation unit 3 configures the barometric altimeter 4 standard barometric pressure based on this barometric pressure data (step STd). After that, the reference atmospheric pressure constituent device shifts to step STb again, and the process from the acquisition of the position data to the calibration of the barometric altimeter is repeated.

Such a standard atmospheric pressure calibrating operation is realized as a standard atmospheric pressure calibrating program, which is provided by being recorded in a recording medium such as a floppy disk.

Thus, in this embodiment, in advance of the pre-flight stage, information on the atmospheric pressure arrangement in the range including the flight route of the aircraft is made into a database and stored in the atmospheric pressure arrangement database unit 2. Then, the position data calculation unit 1 periodically obtains the position data of the aircraft, and the atmospheric pressure data corresponding to this position data is read from the atmospheric pressure arrangement database 2, and the atmospheric pressure altimeter reference atmospheric pressure calculation unit 3 is based on this atmospheric pressure data. The barometric altimeter 4 is calibrated.

That is, the atmospheric pressure altimeter 4 is automatically calibrated by following the change in atmospheric pressure due to the atmospheric pressure arrangement on the ground, and the manual operation is not required when transmitting and receiving the atmospheric pressure data. This makes it possible to improve the durability of the barometric altimeter while reducing the workload.

The present invention is not limited to the above embodiment. For example, in the atmospheric pressure arrangement database unit 2,
It is not necessary to store the atmospheric pressure data of all the points on the weather map 5, and the atmospheric pressure data of the points along the flight path of the aircraft may be stored. By doing so, the memory capacity can be reduced. Further, although the position data calculation unit 1 regularly observes the position of the aircraft, a predetermined route marking point may be registered in advance and the altitude may be measured only at the marking point.

[0017]

As described above in detail, according to the present invention,
A reference atmospheric pressure calibrating device for a barometric altimeter mounted and used on a flying object, comprising: an atmospheric pressure information storage unit for storing and storing a database of atmospheric pressure information of at least a range covering a flight path of the flying object; A position information calculation unit for calculating the position of the flying object in a range covering the flight path of the body, and the position of the flying object calculated by the position information calculation unit based on the stored contents of the atmospheric pressure information storage unit. The reference atmospheric pressure calculating unit for obtaining the atmospheric pressure information in the above, and the reference atmospheric pressure calibrating unit for calibrating the reference atmospheric pressure of the barometric altimeter using the atmospheric pressure information obtained by the reference atmospheric pressure calculating unit as the reference atmospheric pressure are provided. (EN) It is possible to provide a reference atmospheric pressure calibrating device for a barometric altimeter that can reduce the uncertainties when transmitting and receiving data and can calibrate the reference atmospheric pressure more reliably.

Further, according to the present invention, in a standard atmospheric pressure calibrating method of a barometric altimeter mounted and used on a flying object, a barometric pressure information of a range covering at least the flight path of the flying object is made into a database, and this database is used. Based on a database stored in the storage means, and a second step of determining a position of the flying body in a range covering a flight path of the flying body, and a database stored in the storage means. The third step of determining the atmospheric pressure information at the position of the flying object obtained in the second step, and the third step
Since the pressure information obtained in step 1 is used as the reference pressure to calibrate the reference pressure of the barometric altimeter, a fourth step is performed, so that uncertainties in transmitting and receiving the pressure data can be reduced and more reliably. It is possible to provide a method for calibrating the reference pressure of a barometric altimeter that can calibrate the reference pressure.

Further, according to the present invention, there is provided a recording medium in which a program for executing a reference atmospheric pressure calibrating method of a barometric altimeter mounted on a flying object is recorded, and at least a flight path of the flying object is covered. A means for storing atmospheric pressure information in a range, storing the database in a storage means, a means for determining the position of the flying object in a range covering the flight path of the flying object, and a database stored in the storage means. Since the program for executing the means for determining the atmospheric pressure information at the position of the flying object and the means for calibrating the reference atmospheric pressure of the barometric altimeter using this atmospheric pressure information as the reference atmospheric pressure is recorded, (EN) Provided is a recording medium which records a reference pressure correction method capable of reducing the uncertainties when transmitting and receiving data and more reliably correcting the reference pressure. Can.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a reference atmospheric pressure calibrating device according to an embodiment of the present invention.

FIG. 2 is a view conceptually showing a pre-flight preparation work of the reference atmospheric pressure calibrating device according to the embodiment of the present invention.

FIG. 3 is a diagram showing a data flow of the reference pressure calibration device according to the embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of the reference atmospheric pressure calibrating device according to the embodiment of the present invention.

[Explanation of symbols]

1 ... Position data calculator 2 ... Atmospheric pressure database 3 ... Standard pressure calculation unit for barometric altimeter 4 ... Barometric altimeter 5 ... Weather map (pressure map)

Claims (5)

(57) [Claims] 1. A standard atmospheric pressure calibrating device for a barometric altimeter mounted on a flying object, the atmospheric pressure information storage for creating a database of atmospheric pressure information of at least a range covering a flight path of the flying object and storing the information. A position information calculation unit for calculating the position of the flying object in a range covering the flight path of the flying object, and the position information calculation unit based on the stored contents of the atmospheric pressure information storage unit. A reference pressure calculation unit for determining pressure information at the position of the flying object; and a reference pressure correction unit for correcting the reference pressure of the barometric altimeter using the pressure information calculated by the reference pressure calculation unit as a reference pressure. A standard barometric pressure calibrator for barometric altimeter. 2. The atmospheric pressure information storage unit recognizes atmospheric pressure information within a predetermined range based on a given atmospheric pressure arrangement map, and stores it as bitmap information. Reference pressure calibration device for barometric altimeter. 3. The barometric altimeter according to claim 1, wherein the barometric pressure information storage unit stores barometric pressure information on the flight path of the flying object based on a given barometric pressure map. Reference pressure calibration device. 4. A standard atmospheric pressure calibrating method for a barometric altimeter mounted on a flying object, wherein atmospheric pressure information of at least a range covering a flight path of the flying object is made into a database, and the database is stored in a storage means. In the second step based on a database stored in the storage means, a first step of performing the following steps, a second step of obtaining the position of the flying object in a range covering the flight path of the flying object, and a database stored in the storage means. It comprises a third step of determining the atmospheric pressure information at the obtained position of the flying object, and a fourth step of correcting the reference atmospheric pressure of the barometric altimeter using the atmospheric pressure information obtained in the third step as a reference atmospheric pressure. A method for calibrating a reference barometric pressure of a barometric altimeter, comprising: 5. A recording medium recording a program for executing a reference atmospheric pressure calibrating method of a barometric altimeter mounted on a flying object, the atmospheric pressure information of a range covering at least a flight path of the flying object. Based on a database stored in the storage means, a means for storing the database in a storage means, a means for obtaining the position of the flying body in a range covering the flight path of the flying body, and A recording medium recording a program for executing means for determining atmospheric pressure information at a position of a flying object and means for calibrating the reference atmospheric pressure of the barometric altimeter using the atmospheric pressure information as a reference atmospheric pressure.