JP2016217980A - Inclinometer - Google Patents

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JP2016217980A
JP2016217980A JP2015105606A JP2015105606A JP2016217980A JP 2016217980 A JP2016217980 A JP 2016217980A JP 2015105606 A JP2015105606 A JP 2015105606A JP 2015105606 A JP2015105606 A JP 2015105606A JP 2016217980 A JP2016217980 A JP 2016217980A
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acceleration
measurement object
acceleration sensor
inclinometer
parabolic antenna
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磯田　和彦
Kazuhiko Isoda
和彦 磯田
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Shimizu Construction Co Ltd
Shimizu Corp
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Shimizu Construction Co Ltd
Shimizu Corp
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Abstract

PROBLEM TO BE SOLVED: To measure an angle of inclination of a measurement object, even in the case that the measurement object vibrates and the acceleration acts in a horizontal direction.SOLUTION: An inclinometer includes: a first acceleration sensor 2 attached to a parabola antenna attachment part (measurement object) 13 so as to be capable of measuring the acceleration in a first axial direction inclined by 45° to a vertical direction at a reference time, and inclined as the parabola antenna attachment part 13 is inclined to measure the acceleration in the direction inclined by the same angle as the angle by which the parabola antenna attachment part 13 is inclined from the first axial direction; and a second acceleration sensor 3 inclined to the vertical direction by 45° at the reference time to be attached to the parabola antenna attachment part 13 so as to be capable of measuring the acceleration in a second axial direction orthogonal to the first axial direction, and inclined as the parabola antenna attachment part 13 is inclined to measure the acceleration in the direction inclined by the same angle as the angle by which the parabola antenna attachment part 13 is inclined from a second axial direction.SELECTED DRAWING: Figure 2

Description

本発明は、加速度センサを用いた傾斜計に関する。   The present invention relates to an inclinometer using an acceleration sensor.

頂部にパラボラアンテナを設けた通信塔では、使用する電波の周波数が上がるとともに指向性が高まることになる。安定したテレビ映像を得るためには、設置角度誤差が１．５°以内となる精度でパラボラアンテナが設置される必要がある。
パラボラアンテナは塔状構造物に設置される場合が多く、設置されたパラボラアンテナの傾斜角は傾斜計で計測されている。傾斜計としては、例えば、磁気センサや加速度センサなどが設けられていて、重力を利用したものが知られている（例えば、特許文献１乃至３参照）。 In a communication tower provided with a parabolic antenna at the top, the directivity increases as the frequency of radio waves used increases. In order to obtain a stable TV image, it is necessary to install the parabolic antenna with an accuracy that the installation angle error is within 1.5 °.
Parabolic antennas are often installed in tower structures, and the inclination angle of the installed parabolic antennas is measured by an inclinometer. As the inclinometer, for example, a magnetic sensor, an acceleration sensor, and the like are provided, and those using gravity are known (for example, see Patent Documents 1 to 3).

特開平９−８１３０８号公報JP 9-81308 A 特開２００６−１３３２３０号公報JP 2006-133230 A 特開２００８−１８５５１３号公報JP 2008-185513 A

しかしながら、傾斜計は重力を利用しているため、暴風などによって測定対象物が振動し水平方向に加速度が作用していると、錘に慣性力が作用して傾斜角を計測できないという問題がある。このため、測定対象物が振動するような暴風時などにも傾斜角を測定できる傾斜計が求められている。   However, since the inclinometer uses gravity, there is a problem that if the object to be measured vibrates due to a storm and the acceleration acts in the horizontal direction, the inertial force acts on the weight and the tilt angle cannot be measured. . For this reason, an inclinometer capable of measuring an inclination angle even in a windstorm where a measurement object vibrates is required.

そこで、本発明は、測定対象物が振動し水平方向に加速度が作用している場合にも測定対象物の傾斜角を測定することができる傾斜計を提供することを目的とする。   Therefore, an object of the present invention is to provide an inclinometer that can measure the inclination angle of a measurement object even when the measurement object vibrates and acceleration acts in the horizontal direction.

上記目的を達成するため、本発明に係る傾斜計は、基準時において鉛直方向に対し４５°傾斜した第１軸方向の加速度を測定可能となるように測定対象物に取り付けられて、前記測定対象物が傾斜するとともに傾斜して前記第１軸方向から前記測定対象物が傾斜した角度と同じ角度分傾斜した方向の加速度を測定する第１加速度センサと、基準時において鉛直方向に対し４５°傾斜するとともに前記第１軸方向に直交する第２軸方向の加速度を測定可能となるように前記測定対象物に取り付けられて、前記測定対象物が傾斜するとともに傾斜して前記第２軸方向から前記測定対象物が傾斜した角度と同じ角度分傾斜した方向の加速度を測定する第２加速度センサと、を有することを特徴とする。   In order to achieve the above object, an inclinometer according to the present invention is attached to a measurement object so as to be able to measure acceleration in a first axis direction inclined by 45 ° with respect to a vertical direction at a reference time, and the measurement object A first acceleration sensor that measures an acceleration in a direction that is inclined by the same angle as the angle at which the object to be measured is inclined from the first axis direction, and an inclination of 45 ° with respect to the vertical direction at the reference time And is attached to the measurement object so as to be able to measure the acceleration in the second axis direction orthogonal to the first axis direction, and the measurement object is inclined and tilted from the second axis direction. And a second acceleration sensor that measures acceleration in a direction inclined by the same angle as the angle at which the measurement object is inclined.

本発明では、測定対象物が傾斜した際に、第１加速度センサが測定した第１軸方向から測定対象物が傾斜した角度と同じ角度分傾斜した方向の加速度と、第２加速度センサが測定した第２軸方向から測定対象物が傾斜した角度と同じ角度分傾斜した方向の加速度と、重力加速度と、から測定対象物の傾斜角を算出することができる。これにより、暴風などによって測定対象物が振動し水平方向に加速度が作用している場合でも測定対象物の傾斜角を正確に算出することができる。なお、測定対象物の傾斜角の算出方法の詳細については後述する。   In the present invention, when the measurement object is inclined, the acceleration in the direction inclined by the same angle as the angle at which the measurement object is inclined from the first axis direction measured by the first acceleration sensor and the second acceleration sensor are measured. The tilt angle of the measurement target can be calculated from the acceleration in the direction tilted by the same angle as the tilt angle of the measurement target from the second axis direction and the gravitational acceleration. As a result, the tilt angle of the measurement object can be accurately calculated even when the measurement object vibrates due to a storm or the like and acceleration acts in the horizontal direction. The details of the method for calculating the tilt angle of the measurement object will be described later.

また、第１加速度センサおよび第２加速度センサの双方を鉛直方向に対して４５°傾斜させることで、平常時の計測で２つの特性が揃い異常がないかを容易に把握できるとともに、微小な傾斜角でも加速度変化を検知しやすくすることができる。
なお、鉛直方向の加速度を測定する加速度センサと、水平方向の加速度を測定する加速度センサの２つを測定対象物に設置した場合は、平常時には鉛直方向の加速度が−ｇ、水平方向の加速度が０となるため、２つの加速度センサの特性チェックをすることができない。また、このような場合、測定対象物の傾斜角をθとすると、測定対象物の傾斜角θが小さいと、傾斜した際の鉛直方向の加速度の変動率は１−ｃｏｓθと極めて小さく、加速度の変化を検知しにくい。
また、第１加速度センサおよび第２加速度センサを測定対象物に設置する構成であるため、特別な技能を要さず傾斜計を容易に設置することができるとともに、測定対象物が新設の場合だけでなく既設の場合にも適用することができる。 In addition, by tilting both the first acceleration sensor and the second acceleration sensor by 45 ° with respect to the vertical direction, it is possible to easily grasp whether there is no abnormality in the two characteristics in the normal measurement, and a slight tilt Acceleration changes can be easily detected even at corners.
When two acceleration sensors that measure the acceleration in the vertical direction and the acceleration sensor that measures the acceleration in the horizontal direction are installed on the measurement object, the acceleration in the vertical direction is -g and the acceleration in the horizontal direction is normal. Since it becomes 0, the characteristics of the two acceleration sensors cannot be checked. In such a case, if the inclination angle of the measurement object is θ, and the inclination angle θ of the measurement object is small, the fluctuation rate of acceleration in the vertical direction when the measurement object is inclined is extremely small as 1-cos θ, Difficult to detect changes.
Moreover, since it is the structure which installs a 1st acceleration sensor and a 2nd acceleration sensor in a measurement object, while not requiring a special skill, an inclinometer can be installed easily and only when a measurement object is newly installed. It can also be applied to existing cases.

また、本発明に係る傾斜計では、前記第１加速度センサおよび前記第２加速度センサは、一体化されたＭＥＭＳ（Ｍｉｃｒｏ Ｅｌｅｃｔｒｏ Ｍｅｃｈａｎｉｃａｌ Ｓｙｓｔｅｍｓ）センサであることが好ましい。
このような構成とすることにより、傾斜計を小型・軽量かつ安価に製造することができる。また、ＭＥＭＳセンサは消費電力がきわめて小さく省電力での駆動が可能であるため、バッテリの小型化が可能であるとともに、長期計測が可能となる。 In the inclinometer according to the present invention, it is preferable that the first acceleration sensor and the second acceleration sensor are integrated MEMS (Micro Electro Mechanical Systems) sensors.
With such a configuration, the inclinometer can be manufactured in a small size, light weight and low cost. In addition, since the MEMS sensor consumes very little power and can be driven with low power consumption, the battery can be miniaturized and long-term measurement is possible.

本発明によれば、測定対象物が振動し水平方向に加速度が作用している場合にも測定対象物の傾斜角を測定することができる。   According to the present invention, the tilt angle of a measurement object can be measured even when the measurement object vibrates and acceleration acts in the horizontal direction.

本発明の実施形態による傾斜計が設けられる通信塔を説明する図である。It is a figure explaining the communication tower provided with the inclinometer by embodiment of this invention. 本発明の実施形態による傾斜計の一例でパラボラアンテナ取付部が傾斜していない様子を示す図である。It is a figure which shows a mode that the parabolic antenna attachment part is not inclining in an example of the inclinometer by embodiment of this invention. パラボラアンテナ取付部が傾斜している際の傾斜計を示す図である。It is a figure which shows an inclinometer when the parabolic antenna attachment part inclines.

以下、本発明の実施形態による傾斜計について、図１乃至図３に基づいて説明する。
図１に示すように、本実施形態による傾斜計１は、通信塔１１の頂部に設けられたパラボラアンテナ１２の傾斜角を測定するために通信塔１１のパラボラアンテナ１２が取り付けられるパラボラアンテナ取付部（測定対象物）１３に設置されている。本実施形態では、パラボラアンテナ取付部１３の傾斜角はパラボラアンテナ１２の傾斜角と同じ値としている。
図２に示すように、傾斜計１は、パラボラアンテナ取付部１３に取り付けられた第１加速度センサ２および第２加速度センサ３と、第１加速度センサ２および第２加速度センサ３を制御するとともに、それぞれが測定した情報を記憶して処理する制御装置（不図示）と、を有している。 Hereinafter, an inclinometer according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, the inclinometer 1 according to the present embodiment includes a parabolic antenna mounting portion to which the parabolic antenna 12 of the communication tower 11 is mounted in order to measure the tilt angle of the parabolic antenna 12 provided at the top of the communication tower 11. (Measurement object) 13 is installed. In the present embodiment, the inclination angle of the parabolic antenna mounting portion 13 is set to the same value as the inclination angle of the parabolic antenna 12.
As shown in FIG. 2, the inclinometer 1 controls the first acceleration sensor 2 and the second acceleration sensor 3, and the first acceleration sensor 2 and the second acceleration sensor 3 attached to the parabolic antenna attachment portion 13, and And a control device (not shown) for storing and processing the measured information.

第１加速度センサ２は、暴風などによってパラボラアンテナ取付部１３が傾斜していない基準時において鉛直方向（図２の矢印Ｚの方向）に対し４５°傾斜した第１軸方向（図２の矢印Ａの方向）の加速度を測定可能に構成されている。そして、図３に示すように、第１加速度センサ２は、パラボラアンテナ取付部１３が傾斜するとともに傾斜して第１軸方向からパラボラアンテナ取付部１３が傾斜した角度と同じ角度分傾斜した方向（図３の矢印Ｃの方向）の加速度を測定する。
第２加速度センサ３は、基準時において鉛直方向に対し４５°傾斜するとともに第１軸方向に直交する第２軸方向（図２の矢印Ｂの方向）の加速度を測定可能に構成されている。そして、図３に示すように、第２加速度センサ３は、パラボラアンテナ取付部１３が傾斜するとともに傾斜して第２軸方向からパラボラアンテナ取付部１３が傾斜した角度と同じ角度分傾斜した方向（図３の矢印Ｄの方向）の加速度を測定する。
本実施形態では、第１加速度センサ２および第２加速度センサ３は一体化されていて、基準時において第１軸方向および第２軸方向の２つの方向の加速度を測定可能な１つのＭＥＭＳセンサ４で構成されている。 The first acceleration sensor 2 has a first axial direction (arrow A in FIG. 2) inclined 45 ° with respect to the vertical direction (direction of arrow Z in FIG. 2) at the reference time when the parabolic antenna mounting portion 13 is not inclined due to a storm or the like. (According to direction) can be measured. As shown in FIG. 3, the first acceleration sensor 2 is inclined by the same angle as the angle at which the parabolic antenna mounting portion 13 is tilted and the parabolic antenna mounting portion 13 is tilted from the first axial direction ( The acceleration in the direction of arrow C in FIG. 3 is measured.
The second acceleration sensor 3 is configured to be able to measure the acceleration in the second axis direction (in the direction of arrow B in FIG. 2) that is inclined by 45 ° with respect to the vertical direction at the reference time and orthogonal to the first axis direction. As shown in FIG. 3, the second acceleration sensor 3 is tilted by the same angle as the angle at which the parabolic antenna mounting portion 13 tilts and the parabolic antenna mounting portion 13 tilts from the second axis direction ( The acceleration in the direction of arrow D in FIG. 3) is measured.
In the present embodiment, the first acceleration sensor 2 and the second acceleration sensor 3 are integrated, and one MEMS sensor 4 that can measure accelerations in two directions of the first axis direction and the second axis direction at the reference time. It consists of

続いて、本実施形態による傾斜計１によるパラボラアンテナ取付部１３（パラボラアンテナ１２）の傾斜角の算出方法について説明する。   Then, the calculation method of the inclination angle of the parabolic antenna attachment part 13 (parabolic antenna 12) by the inclinometer 1 by this embodiment is demonstrated.

暴風などによってパラボラアンテナ取付部１３が鉛直方向に対して傾斜した傾斜角をθとし、パラボラアンテナ取付部１３が傾斜した際に第１加速度センサ２で得られた加速度（以下、第１加速度とする）をαｕ、第２加速度センサ３で得られた加速度（以下第２加速度）をαｖ、重力加速度をｇとする。
パラボラアンテナ取付部１３に作用する水平方向の加速度をα０、鉛直方向の加速度を−ｇとする。
第１加速度αｕおよび第２加速度αｖは、下式（１）で表される。 An inclination angle at which the parabolic antenna mounting portion 13 is inclined with respect to the vertical direction due to a storm or the like is defined as θ, and an acceleration (hereinafter, referred to as a first acceleration) obtained by the first acceleration sensor 2 when the parabolic antenna mounting portion 13 is inclined. ) Is α u , acceleration obtained by the second acceleration sensor 3 (hereinafter referred to as second acceleration) is α v , and gravitational acceleration is g.
The horizontal acceleration acting on the parabolic antenna mounting portion 13 is α 0 , and the vertical acceleration is −g.
The first acceleration α u and the second acceleration α v are expressed by the following expression (1).

Figure 2016217980
Figure 2016217980

ここで、鉛直方向に延びるｚ軸をθ°傾斜させた方向の加速度は下式（２）で表される。   Here, the acceleration in the direction in which the z-axis extending in the vertical direction is inclined by θ ° is expressed by the following equation (2).

Figure 2016217980
Figure 2016217980

暴風などのない平常時で、パラボラアンテナ取付部１３が傾斜せず、傾斜角θ＝０、水平方向の加速度α０＝０の場合は、鉛直方向の加速度は下式（３）で表される。 When the parabolic antenna mounting portion 13 is not inclined at normal times without a storm, the inclination angle θ = 0, and the horizontal acceleration α 0 = 0, the vertical acceleration is expressed by the following equation (3). .

Figure 2016217980
Figure 2016217980

式（１）を水平方向の加速度α０と鉛直方向の加速度−ｇについて解き、式（２）より以下の式（４）〜（６）のように傾斜角θを求める。 Equation (1) is solved for horizontal acceleration α 0 and vertical acceleration −g, and the inclination angle θ is obtained from Equation (2) as shown in Equations (4) to (6) below.

Figure 2016217980
Figure 2016217980

このように、第１加速度センサ２で得られた第１加速度αｕ、第２加速度センサ３で得られた第２加速度αｖ、重力加速度ｇを用いて傾斜角θを求めることができる。
これにより、暴風などによってパラボラアンテナ取付部１３に水平方向の加速度α０が作用している場合でも正しく傾斜角θを求めることができる。傾斜角θ＝０の場合は、式（５）は平常時の式（３）となる。
なお、水平方向の加速度α０は上記で得られたθと第１加速度αｕおよび第２加速度αｖから下式（７）で求めることができる。 In this way, the inclination angle θ can be obtained using the first acceleration α u obtained by the first acceleration sensor 2, the second acceleration α v obtained by the second acceleration sensor 3, and the gravitational acceleration g.
Thereby, even when the horizontal acceleration α 0 acts on the parabolic antenna mounting portion 13 due to a storm or the like, the inclination angle θ can be obtained correctly. When the tilt angle θ = 0, the equation (5) becomes the ordinary equation (3).
The horizontal acceleration α 0 can be obtained by the following expression (7) from θ obtained above, the first acceleration α u and the second acceleration α v .

Figure 2016217980
Figure 2016217980

次に、上述した傾斜計１の作用・効果について図面を用いて説明する。
上述した本実施形態による傾斜計１では、パラボラアンテナ取付部１３が傾斜した際に、第１加速度センサ２が測定した第１加速度αｕと、第２加速度センサ３が測定した第２加速度αｖと、重力加速度ｇと、からパラボラアンテナ取付部１３の傾斜角を算出することができる。これにより、暴風などによってパラボラアンテナ取付部１３が振動し水平方向の加速度α０が作用している場合でもパラボラアンテナ取付部１３の傾斜角を正確に算出することができる。
従来の傾斜計は重力が鉛直下向きに作用していることを利用しているため、パラボラアンテナ取付部１３に水平方向の加速度α０が作用して錘が水平方向に変位してしまうと正確な傾斜角を計測ができないが、本発明によればパラボラアンテナ取付部１３に水平方向の加速度α０が作用していても問題なく使用できる。
また、第１加速度センサ２および第２加速度センサ３の双方を鉛直方向に対して４５°傾斜させることで、平常時の計測で２つの特性が揃い異常がないかを容易に把握できるとともに、微小な傾斜角でも加速度変化を検知しやすくすることができる。 Next, the operation and effect of the inclinometer 1 will be described with reference to the drawings.
In the inclinometer 1 according to this embodiment described above, the first acceleration α u measured by the first acceleration sensor 2 and the second acceleration α v measured by the second acceleration sensor 3 when the parabolic antenna mounting portion 13 is tilted. And the gravitational acceleration g, the inclination angle of the parabolic antenna mounting portion 13 can be calculated. As a result, even when the parabolic antenna mounting portion 13 vibrates due to a storm or the like and the horizontal acceleration α 0 acts, the inclination angle of the parabolic antenna mounting portion 13 can be accurately calculated.
Since the conventional inclinometer uses the fact that gravity acts vertically downward, if the acceleration α 0 in the horizontal direction acts on the parabolic antenna mounting portion 13 and the weight is displaced in the horizontal direction, it is accurate. Although the inclination angle cannot be measured, the present invention can be used without any problem even if the acceleration α 0 in the horizontal direction acts on the parabolic antenna mounting portion 13.
In addition, by tilting both the first acceleration sensor 2 and the second acceleration sensor 3 by 45 ° with respect to the vertical direction, it is possible to easily grasp whether there are two characteristics in normal measurement and there is no abnormality. It is possible to easily detect a change in acceleration even at a small inclination angle.

なお、鉛直方向の加速度を測定する加速度センサと、水平方向の加速度α０を測定する加速度センサの２つをパラボラアンテナ取付部１３に設置した場合は、平常時には鉛直方向の加速度が−ｇ、水平方向の加速度α０が０となるため、２つの加速度センサの特性チェックをすることができない。また、このような場合、パラボラアンテナ取付部１３の傾斜角θが小さいと、傾斜した際の鉛直方向の加速度の変動率は１−ｃｏｓθと極めて小さく、加速度の変化を検知しにくい。 Incidentally, an acceleration sensor for measuring acceleration in the vertical direction, the case of installing the two acceleration sensors to measure the acceleration alpha 0 in the horizontal direction to the parabolic antenna mounting portion 13, a normal time vertical acceleration -g, horizontal Since the direction acceleration α 0 is 0, the characteristics of the two acceleration sensors cannot be checked. In such a case, if the inclination angle θ of the parabolic antenna mounting portion 13 is small, the variation rate of the acceleration in the vertical direction when it is inclined is extremely small as 1-cos θ, and it is difficult to detect a change in acceleration.

また、第１加速度センサ２および第２加速度センサ３をパラボラアンテナ取付部１３に設置する構成であるため、特別な技能を要さず傾斜計１を容易に設置することができるとともに、パラボラアンテナ取付部１３が新設の場合だけでなく既設の場合にも適用することができる。   In addition, since the first acceleration sensor 2 and the second acceleration sensor 3 are installed in the parabolic antenna mounting portion 13, the inclinometer 1 can be easily installed without requiring special skills, and the parabolic antenna mounting is possible. The present invention can be applied not only to the case where the unit 13 is newly installed but also to the case where the unit 13 is already installed.

また、第１加速度センサ２および第２加速度センサ３は、一体化されたＭＥＭＳセンサ４であることにより、傾斜計１を小型・軽量かつ安価に製造することができる。また、ＭＥＭＳセンサ４は消費電力がきわめて小さく省電力での駆動が可能であるため、バッテリの小型化が可能であるとともに、長期計測が可能となる。   Further, since the first acceleration sensor 2 and the second acceleration sensor 3 are the integrated MEMS sensor 4, the inclinometer 1 can be manufactured in a small size, a light weight and at a low cost. In addition, since the MEMS sensor 4 has extremely low power consumption and can be driven with low power consumption, the battery can be miniaturized and long-term measurement can be performed.

以上、本発明による傾斜計の実施形態について説明したが、本発明は上記の実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。
例えば、上記の実施形態では、傾斜計１を通信塔１１のパラボラアンテナ取付部１３に設置しているが、パラボラアンテナ１２に直接設置してもよい。また、傾斜計１によって傾斜角を測定する測定対象物は、パラボラアンテナ１２やパラボラアンテナ取付部１３以外であってもよい。
また、上記の実施形態では、パラボラアンテナ取付部１３に第１加速度センサ２と第２加速度センサ３とが一体化されたＭＥＭＳセンサ４が設置されているが、第１加速度センサ２と第２加速度センサ３とがそれぞれ個別に設置されていてもよい。 The embodiment of the inclinometer according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.
For example, in the above embodiment, the inclinometer 1 is installed in the parabolic antenna mounting portion 13 of the communication tower 11, but may be installed directly on the parabolic antenna 12. Further, the measurement object whose inclination angle is measured by the inclinometer 1 may be other than the parabolic antenna 12 or the parabolic antenna mounting portion 13.
Further, in the above embodiment, the MEMS sensor 4 in which the first acceleration sensor 2 and the second acceleration sensor 3 are integrated is installed in the parabolic antenna mounting portion 13. However, the first acceleration sensor 2 and the second acceleration sensor are integrated. The sensors 3 may be installed individually.

１ 傾斜計
２ 第１加速度センサ
３ 第２加速度センサ
４ ＭＥＭＳセンサ
１３ パラボラアンテナ取付部（測定対象物） DESCRIPTION OF SYMBOLS 1 Inclinometer 2 1st acceleration sensor 3 2nd acceleration sensor 4 MEMS sensor 13 Parabolic antenna attachment part (measuring object)

Claims (2)

基準時において鉛直方向に対し４５°傾斜した第１軸方向の加速度を測定可能となるように測定対象物に取り付けられて、前記測定対象物が傾斜するとともに傾斜して前記第１軸方向から前記測定対象物が傾斜した角度と同じ角度分傾斜した方向の加速度を測定する第１加速度センサと、
基準時において鉛直方向に対し４５°傾斜するとともに前記第１軸方向に直交する第２軸方向の加速度を測定可能となるように前記測定対象物に取り付けられて、前記測定対象物が傾斜するとともに傾斜して前記第２軸方向から前記測定対象物が傾斜した角度と同じ角度分傾斜した方向の加速度を測定する第２加速度センサと、を有することを特徴とする傾斜計。 It is attached to the measurement object so as to be able to measure the acceleration in the first axis direction tilted by 45 ° with respect to the vertical direction at the reference time, and the measurement object is tilted and tilted from the first axis direction. A first acceleration sensor that measures acceleration in a direction inclined by the same angle as the angle at which the measurement object is inclined;
At the time of reference, it is attached to the measurement object so as to be able to measure the acceleration in the second axis direction orthogonal to the first axis direction while being inclined by 45 ° with respect to the vertical direction, and the measurement object is inclined. An inclinometer, comprising: a second acceleration sensor that measures an acceleration in a direction inclined by the same angle as the angle of inclination of the measurement object from the second axis direction. 前記第１加速度センサおよび前記第２加速度センサは、一体化されたＭＥＭＳセンサであることを特徴とする請求項１に記載の傾斜計。   The inclinometer according to claim 1, wherein the first acceleration sensor and the second acceleration sensor are integrated MEMS sensors.
JP2015105606A 2015-05-25 2015-05-25 Inclinometer Pending JP2016217980A (en)

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