JPH01307614A - Electronic apparatus with altimeter - Google Patents

Electronic apparatus with altimeter

Info

Publication number
JPH01307614A
JPH01307614A JP63138313A JP13831388A JPH01307614A JP H01307614 A JPH01307614 A JP H01307614A JP 63138313 A JP63138313 A JP 63138313A JP 13831388 A JP13831388 A JP 13831388A JP H01307614 A JPH01307614 A JP H01307614A
Authority
JP
Japan
Prior art keywords
altitude
circuit
surface temperature
sea surface
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP63138313A
Other languages
Japanese (ja)
Inventor
Hayao Umemoto
梅本 隼雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP63138313A priority Critical patent/JPH01307614A/en
Priority to DE1989609842 priority patent/DE68909842T2/en
Priority to EP19890304021 priority patent/EP0345929B1/en
Publication of JPH01307614A publication Critical patent/JPH01307614A/en
Priority to US07/794,848 priority patent/US5224059A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To reduce an error caused by a fluctuation of a sea surface temperature and to offer an altimeter having high accuracy by correcting a temperature correction above-sea-level altitude which is calculated, based on a sea surface temperature in altitude stored in a latitude storage circuit by a correction value stored in a correction value storage circuit. CONSTITUTION:A time measuring circuit holds a calendar function and displays time, etc. on a display device 14. By a temperature coefficient storage circuit for storing a temperature coefficient of each month and latitude stored in a latitude storage circuit 8, a sea surface temperature is calculated in a sea surface temperature arithmetic circuit 6. Based on such a sea surface temperature and an above-sea-level altitude when it is assumed to be a standard atmosphere which is calculated by a standard atmosphere altitude arithmetic circuit 4, a temperature correction above-sea-level altitude is calculated by a temperature correction altitude arithmetic circuit 9. This temperature above-sea-level altitude is corrected by a correction value which is stored in a correction value storage circuit 11 being the second storage circuit in a display altitude arithmetic circuit 12. In such a way, a corrected altitude is displayed on a display device 14 together with time information by a display driving circuit 13.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、高度計測機能を有する水晶腕時計に関するも
のである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a crystal wristwatch having an altitude measurement function.

〔従来の技術〕[Conventional technology]

従来の携帯式高度計は、アネロイド式圧力計を使用して
気圧を計測し、標準大気(海抜Omにおける温度(海面
温度と称する)が15°C1海抜Omにおける気圧(海
面気圧と称す)が1013゜25mbの状態をいう)に
おける気圧と高さの関係(理科年表等に記載されている
表又は測高公式)に則って、計測した気圧を高さに変換
して表示する物であった。この方式は、圧力に応じて指
示針が動く機械式であり、前記気圧と高さの関係に則っ
て目盛を付けるだけで高さを表示することが出来た。し
かし、前記気圧と高さの関係は標準大気における換算で
あり実際には海面温度及び海面気圧は、一定ではないた
め表示された高さは誤差を持っている。そのため、登山
等で使用する時は標識等により既知の高度の地点で目盛
を合わせ直す事により、其地点からの相対高度を利用す
ることで誤差を小さ(するように工夫をしていた。
Conventional portable altimeters measure atmospheric pressure using an aneroid pressure gauge, and the standard atmosphere (temperature at sea level (referred to as sea surface temperature) is 15°C1 pressure at sea level (referred to as sea level pressure) is 1013°) It was a device that converted the measured atmospheric pressure into height and displayed it in accordance with the relationship between atmospheric pressure and height (the table or height measurement formula described in the Science Chronology, etc.) at the height of 25 mb. This system was a mechanical type in which the pointer moved in response to pressure, and height could be displayed simply by marking a scale according to the relationship between atmospheric pressure and height. However, the relationship between atmospheric pressure and height is based on standard atmospheric conditions, and in reality, sea surface temperature and sea surface pressure are not constant, so the displayed height has an error. Therefore, when using it for mountain climbing, etc., the scale was readjusted at a point at a known altitude using signs, etc., and the error was reduced by using the relative altitude from that point.

海面気圧の変動による影響に付いて述べる。標準大気で
ない例えば海面温度が15°C,海面気圧が1030m
bの時には、海抜1000mの地点では913.5mb
で有るが、標準大気における気圧と高さの関係によれば
913.5mbの気圧では高さは865mを表示する。
We will discuss the effects of changes in sea level pressure. Non-standard atmosphere For example, sea surface temperature is 15°C, sea level pressure is 1030 m
At the time of b, 913.5mb at 1000m above sea level
However, according to the relationship between atmospheric pressure and height in standard atmosphere, at an atmospheric pressure of 913.5 mb, the height is displayed as 865 m.

同じ条件の時に海抜1500mの地点では859.5’
mbであるので標準大気においての高さは1365mを
表示する。即ち表示する絶対高さでは1000mの地点
でも1500mの地点でも一135mの誤差を持つこと
となる。そこで、1000mの地点で+135m表示の
補正を行なうことにより、1500mの地点では136
5m+135m=1500mを表示することになり誤差
がOmとなる。同様に海面気圧が980mbの時には実
際の海抜1000mの地点では1274mを表示し、海
抜1500mの地点では1771mを表示することにな
り、海抜1000mの地点で一274m補正を行なえば
1500m地点では1771m−274m=1497m
となり誤差は一3mですむことになる。即ち実用範囲で
生ずる海面気圧の変動に関しては、補正操作により無視
できる程度の誤差に押さえることが可能である。
Under the same conditions, at a point 1500m above sea level, it is 859.5'
mb, the height in standard atmosphere is displayed as 1365 m. That is, the displayed absolute height will have an error of -135 m whether it is at a point of 1000 m or at a point of 1500 m. Therefore, by correcting the +135m display at the 1000m point, 136m at the 1500m point.
5m+135m=1500m will be displayed, and the error will be Om. Similarly, when the sea level pressure is 980 mb, the actual point at 1000 m above sea level will be displayed as 1274 m, and the point at 1500 m above sea level will be shown as 1771 m. If the 1000 m above sea level point is corrected by -274 m, then the 1500 m point will be 1771 m - 274 m. =1497m
Therefore, the error is only 13 meters. In other words, with regard to fluctuations in sea level pressure that occur within a practical range, it is possible to suppress the error to a negligible level by performing a correction operation.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

以上述べたように、従来のアネロイド式圧力計では使用
する時に誤差を小さくするように工夫していたがそれで
も海面温度の変動に対しては大きな誤差を持っていた。
As mentioned above, conventional aneroid pressure gauges have been designed to reduce errors during use, but they still have large errors in response to changes in sea surface temperature.

気圧と高さの関係式は h=153.85XTO x (1−(P/po)0.190255)(1)式こ
こで、TO:海抜Omの絶対温度(OK) P:測定地点の気圧(m b ) PO:海抜Omの気圧(mb) であり高さは海面温度の絶対温度に比例する。
The relationship between atmospheric pressure and height is h = 153.85 m b ) PO: Atmospheric pressure (mb) at Om above sea level, and the height is proportional to the absolute sea surface temperature.

即ちある基準点で誤差を補正して合わせ直したとしても
それからの相対高さにたいして海面の絶対温度誤差の割
合だけ誤差を生じる事になる。
In other words, even if the error is corrected and re-aligned at a certain reference point, the relative height from that point will have an error in proportion to the absolute sea surface temperature error.

例えば海面気圧が1013.25mbで海面温度がO″
Cの時には 1000m地点では1055mを表示し1500m地点
では1582mを表示する。
For example, when the sea level pressure is 1013.25 mb, the sea surface temperature is O''
At C, 1055m is displayed at the 1000m point and 1582m is displayed at the 1500m point.

そこで、1000mで一55m補正して合わせ直したと
しても1500m地点では1527mを表示することに
なり27mもの誤差を有する等の大きな欠点が有った。
Therefore, even if the distance was corrected by 155 m at 1000 m and readjusted, 1527 m would be displayed at the 1500 m point, resulting in a 27 m error, which was a major drawback.

本発明の目的は、海面温度の変動による誤差を小さくし
精度の良い高度計を提供するものである。
An object of the present invention is to provide a high-precision altimeter that reduces errors caused by changes in sea surface temperature.

(課題を解決するための手段) 上記目的を達成するために、本発明は時刻計測回路は少
なくともカレンダー情報を計数する回路で有り、外部か
ら入力された地域情報を書き込み読み出しが可能な第一
の記憶回路と、該第一の記憶回路の内容と前記時刻計測
回路の内容から海面温度を演算する海面温度演算回路と
、圧力センサーにより計測した気圧と前記海面温度演算
回路で演算された海面温度により高度を演算する第一高
度演算回路、該第一高度演算回路で演算された高度を外
部入力により補正したときに該補正値を記憶する第二の
記憶回路と、該第二の記憶回路に記憶されている補正値
と前記第一高度演算回路により演算された高度とから実
際の高度を演算する第二高度演算回路により構成されて
いることを特徴とする。
(Means for Solving the Problems) In order to achieve the above object, the present invention provides a time measurement circuit that is a circuit that counts at least calendar information, and a first circuit that can write and read regional information input from the outside. a storage circuit, a sea surface temperature calculation circuit that calculates sea surface temperature from the contents of the first storage circuit and the contents of the time measurement circuit, and based on the atmospheric pressure measured by the pressure sensor and the sea surface temperature calculated by the sea surface temperature calculation circuit. A first altitude calculation circuit that calculates altitude; a second storage circuit that stores a correction value when the altitude calculated by the first altitude calculation circuit is corrected by external input; and a storage circuit that stores the correction value in the second storage circuit. The present invention is characterized by comprising a second altitude calculation circuit that calculates an actual altitude from the corrected value and the altitude calculated by the first altitude calculation circuit.

〔実施例〕〔Example〕

以下、本発明の実施例を図面に基づいて詳細に説明する
。第1図は、本発明のシステムを示すブロック図である
Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram illustrating the system of the present invention.

時刻計測回路1は時刻の他に月及び日のカレンダー機能
を保有する通常のデジタル時計の機能であり、表示駆動
回路13により表示装置14に時刻等を表示している。
The time measurement circuit 1 is a function of a normal digital watch that has a calendar function for the month and day in addition to the time, and displays the time and the like on the display device 14 by the display drive circuit 13.

半導体から成る圧力センサー2により計測された大気圧
は、A/D変換回路3により気圧値に変換される。標準
大気高度演算回路4は前述の(1)式においてPO=1
013.25、海面温度15°Cの時の絶対温度はTO
=288.15として前記A/D変換回路3により変換
された気圧値を標準大気と仮定した高度に変換する回路
である。
Atmospheric pressure measured by a pressure sensor 2 made of a semiconductor is converted into an atmospheric pressure value by an A/D conversion circuit 3. The standard atmospheric altitude calculation circuit 4 calculates PO=1 in the above equation (1).
013.25, the absolute temperature when the sea surface temperature is 15°C is TO
This circuit converts the atmospheric pressure value converted by the A/D conversion circuit 3 as =288.15 into an altitude assuming standard atmosphere.

温度係数記憶回路5は、海面温度を演算するための各月
における温度係数を記憶する回路であり該温度係数は次
のようになっている。日本各地における各月の気温のデ
ータから近似式を求めると、t=−αN+48 じC)
  ・ ・ ・ (2)式となる。この式においてNは
緯度、tは緯度N地点での海面温度であり、αが前記温
度係数である。
The temperature coefficient storage circuit 5 is a circuit that stores temperature coefficients for each month for calculating sea surface temperature, and the temperature coefficients are as follows. An approximate formula is calculated from monthly temperature data in various parts of Japan: t=-αN+48 (C)
・ ・ ・ Equation (2) is obtained. In this equation, N is the latitude, t is the sea surface temperature at the latitude N point, and α is the temperature coefficient.

温度係数αは月により決まる定数であり、1月:1.2
33.2月: 1.224.3月: 1.143等とす
ると理科年表に記載されている各地の月毎平均気温を0
.65°C/100mとして海面温度に換算した場合大
半は±2°Cに入る。
The temperature coefficient α is a constant determined by the month; January: 1.2
33.February: 1.224.March: 1.143 mag, then the monthly average temperature of each place listed in the Science Chronology is 0.
.. When converted to sea surface temperature at 65°C/100m, the majority falls within ±2°C.

一方緯度入力回路7は計測地点の緯度Nを外部から入力
するための回路であり、入力された緯度Nは、第一の記
憶回路である緯度記憶回路8に記憶される。海面温度演
算回路6は、時刻計測回路1の月データより温度係数記
憶回路5から温度係数αを選択し、緯度記憶回路8に記
憶されている緯度Nにおける海面温度を(2)式により
計算する。前記標準大気高度演算回路4により演算され
た標準大気と仮定した時の海抜高度と前記海面温度演算
回路6を基に第一高度演算回路である温度補正高度演算
回路9により温度補正海抜高度を計算する。計算式は、 HO(m)=hX288.15 ÷(273,15+t) ここに、HO:温度補正高度 t(’(:):入力緯度における海面温度これは、海面
気圧1013.25mbとして計算されたものであり実
際には誤差を持っている。第二高度演算回路である表示
高度演算回路12は、前記温度補正海抜高度を、第二の
記憶回路である補正値記憶回路11に記憶されている補
正値で補正する演算を行なう回路であり次の式を計算す
る、H(m)=HO+hO H:補正高度 ho (m):補正値 該補正高度は表示駆動回路13により前記時刻情報と共
に表示装置14に表示される。該補正値は最初に緯度入
力回路7から緯度を入力したときにリセットされ最初は
0である。即ち最初は表示高度演算回路12により演算
された表示高度は温度補正高度演算回路9の演算結果と
同じであり海面気圧の変動による誤差を持っている。こ
の誤差を除去する手段は従来例と同様に表示装置に表示
された高度を見ながら標識等の既知の高度の地点で高度
補正入力回路10より正規の高度に補正する。
On the other hand, the latitude input circuit 7 is a circuit for inputting the latitude N of the measurement point from the outside, and the input latitude N is stored in the latitude storage circuit 8, which is a first storage circuit. The sea surface temperature calculation circuit 6 selects the temperature coefficient α from the temperature coefficient storage circuit 5 based on the monthly data of the time measurement circuit 1, and calculates the sea surface temperature at the latitude N stored in the latitude storage circuit 8 using equation (2). . Based on the altitude above sea level assuming a standard atmosphere calculated by the standard atmospheric altitude calculation circuit 4 and the sea surface temperature calculation circuit 6, the temperature correction altitude calculation circuit 9, which is a first altitude calculation circuit, calculates the temperature corrected altitude above sea level. do. The calculation formula is: HO(m)=h The display altitude calculation circuit 12, which is a second altitude calculation circuit, stores the temperature-corrected altitude above sea level in the correction value storage circuit 11, which is a second storage circuit. This is a circuit that performs calculations for correction using a correction value, and calculates the following formula: H(m)=HO+hOH H: Correction altitude ho (m): Correction value The correction altitude is displayed on the display device along with the time information by the display drive circuit 13. 14. The correction value is reset when the latitude is first input from the latitude input circuit 7 and is initially 0. That is, the display altitude calculated by the display altitude calculation circuit 12 is initially calculated by temperature correction altitude calculation. It is the same as the calculation result of circuit 9, and has an error due to changes in sea level pressure.The means to remove this error is as in the conventional example, by checking the altitude displayed on the display and pointing to a known altitude point such as a sign. The altitude is corrected to the normal altitude by the altitude correction input circuit 10.

この時に表示高度を補正すると同時に該補正値を補正値
記憶回路11に記憶しておく。例えば、1000mの地
点で1040mを表示していた時には一40mの補正値
を高度補正入力回路10に入力し補正値記憶回路11に
−40が記憶される。  。
At this time, the displayed altitude is corrected and at the same time the correction value is stored in the correction value storage circuit 11. For example, when 1040 m is displayed at a point of 1000 m, a correction value of -40 m is input to the altitude correction input circuit 10 and -40 is stored in the correction value storage circuit 11. .

これで次回の計測時には該補正値が考慮されることにな
り海面気圧の影響による誤差は無視できるようになる。
The correction value will now be taken into consideration during the next measurement, and errors due to the influence of sea level pressure can be ignored.

本実施例では同じ万円では同じ温度係数を使用していた
が、月日の両者の情報から直線補間により月始めや月末
における海面温度を演算して更に精度の良いデータを得
ることができるようにすることも可能である。
In this example, the same temperature coefficient was used for the same 10,000 yen, but it is now possible to obtain even more accurate data by calculating the sea surface temperature at the beginning and end of the month by linear interpolation from the information on both month and day. It is also possible to

尚、本実施例は日本の地域に適用したものであるが、世
界各地へ適用するとすれば、外部からの地域情報は緯度
だけでなく、経度等も入力することを必要とする場合も
ある。
Note that although this embodiment is applied to the region of Japan, if it is applied to various parts of the world, it may be necessary to input not only latitude but also longitude, etc. of regional information from the outside.

〔発明の効果] 以上の説明で明らかなように、本発明によれば海面気圧
の影響は従来の高度計と同様に無視できる程度に小さく
出来、季節の変化による海面温度の影響も概ね同じ位の
緯度で使用するときには時刻計測機能により自動的に近
似し年間を通じて誤差の小さい高度計測が可能になった
[Effects of the Invention] As is clear from the above explanation, according to the present invention, the influence of sea level pressure can be reduced to the negligible extent as with conventional altimeters, and the influence of sea surface temperature due to seasonal changes can be reduced to about the same level. When used at latitude, the time measurement function automatically approximates altitude, making it possible to measure altitude with little error throughout the year.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明のシステムのブロック図である。 1・・時刻計測回路、 2・・圧力センサー、3・・A
/D変換回路、 4・・標準大気高度演算回路、 5・・温度係数記憶回路、 6・・海面温度演算回路、 7・・緯度入力回路、 8・・緯度記憶回路、9・・温
度補正高度演算回路、 10・・高度補正入力回路、 11・・補正値記憶回路、 12・・表示高度演算回路、 13・・表示駆動回路、  14・・表示装置。 第1図 1、事件の表示 昭和63年特許願第138313号 2、発明の名称 高度計付電子機器 3、補正をする者 事件との関係(特許出願人) 自   発 5、禎正により増加する発明の数 な   し 6、補正の対象 明細書の「発明の詳細な説明Jの欄 7、補正の内容 1)明細書第4頁第10行目〜第17行目「気圧と高さ
の・・・温度に比例する。」とあるを、r気圧と高さの
関係式は h=153.85XT。 ・・・・・・(1)弐 ここで、TO=海抜Omの絶対温度(°K)P :測定
地点の気圧(mb) PO:海抜Omの気圧(mb)テアリ、高さは海面温度
の絶対温度に比例する。」と補正−る。
FIG. 1 is a block diagram of the system of the present invention. 1...Time measurement circuit, 2...Pressure sensor, 3...A
/D conversion circuit, 4. Standard atmospheric altitude calculation circuit, 5. Temperature coefficient storage circuit, 6. Sea surface temperature calculation circuit, 7. Latitude input circuit, 8. Latitude storage circuit, 9. Temperature correction altitude. Arithmetic circuit, 10. Altitude correction input circuit, 11. Correction value storage circuit, 12. Display altitude calculation circuit, 13. Display drive circuit, 14. Display device. Figure 1 1, Indication of the case Patent Application No. 138313 filed in 1988 2, Name of the invention Electronic device with altimeter 3, Person making the amendment Relationship with the case (patent applicant) Spontaneity 5, Inventions increasing due to Teisho No number 6, "Column 7 of Detailed Description of the Invention J, Contents of the Amendment 1) Page 4 of the Specification, Lines 10 to 17, ``Atmospheric pressure and height...・Proportional to temperature.'' The relationship between r atmospheric pressure and height is h = 153.85XT.・・・・・・(1)2 Here, TO = absolute temperature at sea level (°K) P: atmospheric pressure at the measurement point (mb) PO: atmospheric pressure at sea level (mb), the height is the sea surface temperature Proportional to absolute temperature. ” he corrected.

Claims (1)

【特許請求の範囲】[Claims] 少なくともカレンダー情報を計数する時刻計測回路と気
圧を計測する圧力計測機能を有する高度計付電子機器に
おいて、外部から入力された地域情報を書き込み読み出
しが可能な第一の記憶回路と、該第一の記憶回路の内容
と前記時刻計測回路の内容から海面温度を演算する海面
温度演算回路と、前記圧力計測機能により計測した気圧
と前記海面温度演算回路で演算された海面温度とにより
高度を演算する第一高度演算回路と、該第一高度演算回
路で演算された高度を外部入力により補正したときに該
補正値を記憶する第二の記憶回路と、該第二の記憶回路
に記憶されている補正値と前記第一高度演算回路により
演算された高度とから実際の高度を演算する第二高度演
算回路を有することを特徴とする高度計付電子機器。
In an electronic device with an altimeter having at least a time measurement circuit for counting calendar information and a pressure measurement function for measuring atmospheric pressure, a first memory circuit capable of writing and reading regional information inputted from the outside; a sea surface temperature calculation circuit that calculates sea surface temperature from the contents of the circuit and the contents of the time measurement circuit; and a first sea surface temperature calculation circuit that calculates altitude based on the atmospheric pressure measured by the pressure measurement function and the sea surface temperature calculated by the sea surface temperature calculation circuit. an altitude calculation circuit; a second storage circuit that stores a correction value when the altitude calculated by the first altitude calculation circuit is corrected by an external input; and a correction value stored in the second storage circuit. An electronic device with an altimeter, comprising a second altitude calculation circuit that calculates an actual altitude from the altitude calculated by the first altitude calculation circuit.
JP63138313A 1988-06-07 1988-06-07 Electronic apparatus with altimeter Pending JPH01307614A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP63138313A JPH01307614A (en) 1988-06-07 1988-06-07 Electronic apparatus with altimeter
DE1989609842 DE68909842T2 (en) 1988-06-07 1989-04-21 Device for measuring height and barometric pressure.
EP19890304021 EP0345929B1 (en) 1988-06-07 1989-04-21 A device for measuring altitude and barometric pressure
US07/794,848 US5224059A (en) 1988-06-07 1991-11-21 Device for measuring altitude and barometric pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63138313A JPH01307614A (en) 1988-06-07 1988-06-07 Electronic apparatus with altimeter

Publications (1)

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JPH01307614A true JPH01307614A (en) 1989-12-12

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JP63138313A Pending JPH01307614A (en) 1988-06-07 1988-06-07 Electronic apparatus with altimeter

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JP (1) JPH01307614A (en)

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JP2007309941A (en) * 2006-05-19 2007-11-29 Eta Sa Manufacture Horlogere Suisse Barometric altimeter having temperature compensating device
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WO2010113520A1 (en) 2009-04-01 2010-10-07 新日本製鐵株式会社 Device and method for continuously measuring horizontal flux of falling particulate matter in atmosphere
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US8850904B2 (en) 2009-04-01 2014-10-07 Nippon Steel & Sumitomo Metal Corporation Horizontal component catcher of dustfall in atmosphere and measuring method of horizontal component
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JP2008544216A (en) * 2005-06-13 2008-12-04 ノキア コーポレイション Atmospheric model
KR101364855B1 (en) * 2006-05-19 2014-02-19 에타 쏘시에떼 아노님 마누팍투레 홀로게레 스위세 Barometric altimeter including a temperature compensation device
JP2007309941A (en) * 2006-05-19 2007-11-29 Eta Sa Manufacture Horlogere Suisse Barometric altimeter having temperature compensating device
WO2010113520A1 (en) 2009-04-01 2010-10-07 新日本製鐵株式会社 Device and method for continuously measuring horizontal flux of falling particulate matter in atmosphere
US8578788B2 (en) 2009-04-01 2013-11-12 Nippon Steel & Sumitomo Metal Corporation Device and method for continuously measuring horizontal flux of dustfall in atmosphere
US8850904B2 (en) 2009-04-01 2014-10-07 Nippon Steel & Sumitomo Metal Corporation Horizontal component catcher of dustfall in atmosphere and measuring method of horizontal component
JP5961705B2 (en) * 2012-12-04 2016-08-02 旭化成株式会社 Barometric altimeter and indoor compatible barometric altimeter
WO2014087598A1 (en) * 2012-12-04 2014-06-12 旭化成株式会社 Barometric altimeter and barometric altimeter adapted to indoor use
US9574877B2 (en) 2012-12-04 2017-02-21 Asahi Kasei Kabushiki Kaisha Barometric altimeter for indoor use
JP2014228329A (en) * 2013-05-21 2014-12-08 富士ゼロックス株式会社 Position identification processing device, position identification processing program, portable information processing device, and portable information processing program
WO2014188618A1 (en) * 2013-05-21 2014-11-27 富士ゼロックス株式会社 Position specification processing device, position specification processing method, position specification processing program, mobile information processing device, mobile information processing method, mobile information processing program, and storage medium
US10317206B2 (en) 2013-05-21 2019-06-11 Fuji Xerox Co., Ltd. Location determination processing device and storage medium
CN109642793A (en) * 2016-09-09 2019-04-16 内克斯特纳夫有限公司 System and method for calibrating unstable sensor
US11199406B2 (en) 2016-09-09 2021-12-14 Nextnav, Llc Systems and methods for calibrating unstable sensors
US11761765B2 (en) 2016-09-09 2023-09-19 Nextnav, Llc Calibrating a pressure sensor
US11892295B2 (en) 2016-09-09 2024-02-06 Nextnav, Llc Systems and methods for calibrating unstable sensors

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