JPH0694458A - Structure level measuring apparatus - Google Patents
Structure level measuring apparatusInfo
- Publication number
- JPH0694458A JPH0694458A JP26403691A JP26403691A JPH0694458A JP H0694458 A JPH0694458 A JP H0694458A JP 26403691 A JP26403691 A JP 26403691A JP 26403691 A JP26403691 A JP 26403691A JP H0694458 A JPH0694458 A JP H0694458A
- Authority
- JP
- Japan
- Prior art keywords
- level
- light
- laser
- measurement
- laser beam
- 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.)
- Granted
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、構造物の多数点のレベ
ルをレ−ザ光線を利用して計測する計測装置の改良に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a measuring device for measuring the level of a large number of points of a structure by using a laser beam.
【0002】[0002]
【従来の技術】構造物の不同沈下の計測など、構造物に
設置された多数の計測点のレベル変化を知る方法とし
て、最近レ−ザ光線の発光器と受光器を用いて計測を行
う電子計測方法が多く採用されている。2. Description of the Related Art Recently, as a method of knowing the level change of a large number of measurement points installed in a structure such as measurement of uneven settlement of a structure, electronic measurement using a laser beam emitter and a receiver Many measurement methods are used.
【0003】例えば特開昭60−25413号公報に
は、レ−ザ光線の発光器を基準点に設置し、被測定部位
に受光器を取り付け、上下方向に多数の受光素子を配置
した受光器にレ−ザ光線を照射することにより、受光し
た素子の位置からその測定部位のレベルを判断するもの
が提案されている。構造物の不同沈下のように測定点が
多数にわたり、しかも定期的な計測を必要とする場合に
は、受光器をその位置にセットしておき、その出力をコ
ンピュータに入力させることにより、能率の良い測定を
実施することができる。For example, in Japanese Patent Laid-Open No. 60-25413, a laser beam light emitter is installed at a reference point, a light receiver is attached to a measurement site, and a large number of light receiving elements are arranged vertically. It has been proposed that the level of the measurement site is judged from the position of the light-receiving element by irradiating the laser beam on. When there are many measurement points such as uneven settlement of the structure, and moreover, periodical measurement is required, set the photoreceiver at that position and input the output to the computer to improve the efficiency. Good measurements can be performed.
【0004】[0004]
【発明が解決しようとする課題】ところがこの場合、レ
ベル計測の精度(分解能)を高めるには受光器に上下方
向へ配列する受光素子の配列密度を高くする必要がある
が、測定点が多数にわたる場合は、受光器の設置個数が
増えることもあって、このような素子密度の高い受光器
を多数準備しなければならず、計測装置を非常に高価な
ものにしてしまい、さらに、分解能を高めるには周囲の
振動、作業用の車両や人員などの外乱による計測誤差を
検知して排除しなければならない。However, in this case, in order to improve the accuracy (resolution) of the level measurement, it is necessary to increase the array density of the light receiving elements vertically arranged in the light receiver, but there are many measurement points. In this case, since the number of light receivers installed may increase, it is necessary to prepare a large number of light receivers having such a high element density, which makes the measuring device very expensive and further increases the resolution. For this reason, it is necessary to detect and eliminate measurement errors due to ambient vibrations and disturbances such as work vehicles and personnel.
【0005】そこで本発明は、以上の問題点を解決すべ
くなされたもので、計測誤差の少ない高精度の構造物レ
ベル計測装置を提供することを目的とする。Therefore, the present invention has been made to solve the above problems, and an object of the present invention is to provide a highly accurate structure level measuring apparatus with few measurement errors.
【0006】[0006]
【課題を解決するための手段】第1の発明は、図1にお
いて、構造物の計測点に設置してレ−ザ光線の受光によ
り受光信号を出力する受光器2と、レ−ザ光線を水平方
向に照射しながら所定の速度で水平旋回するレ−ザ照射
器1と、このレ−ザ照射器1を所定の速度で上下させる
昇降装置と、レ−ザ照射器1の発光レベルの変化を所定
の単位毎に検出する手段19と、この検出手段19が検
出する各レ−ザ発光レベルにおける前記受光器2の受光
信号の出力回数の平均値とから受光器2を配置した計測
点のレベルを演算する受光位置演算手段30と、受光レ
ベルの最高値と最低値の差が予め設定した許容値を越え
るときに計測異常を判定するレベル分布比較手段32
と、この比較手段32の異常判定時には少なくとも前記
演算手段30のレベル演算結果の無効を表示し、再計測
する制御手段31を備える。A first aspect of the present invention is to provide a light receiver 2 installed in a measuring point of a structure in FIG. 1 for outputting a light receiving signal by receiving a laser beam, and a laser beam. A laser irradiator 1 that horizontally swirls at a predetermined speed while irradiating in the horizontal direction, an elevating device that raises and lowers the laser irradiator 1 at a predetermined speed, and a change in emission level of the laser irradiator 1. Is detected for each predetermined unit, and the average value of the number of times the light receiving signal of the light receiving device 2 is output at each laser emission level detected by the detecting device 19 The light receiving position calculating means 30 for calculating the level and the level distribution comparing means 32 for judging the measurement abnormality when the difference between the maximum value and the minimum value of the light receiving level exceeds a preset allowable value.
Further, at the time of the abnormality judgment of the comparison means 32, at least the control means 31 for displaying invalidity of the level calculation result of the calculation means 30 and re-measurement is provided.
【0007】第2の発明は、図1において、構造物の計
測点に設置してレ−ザ光線の受光により受光信号を出力
する受光器2と、レ−ザ光線を水平方向に照射しながら
所定の速度で水平旋回するレ−ザ照射器1と、このレ−
ザ照射器1を所定の速度で上下させる昇降装置と、レ−
ザ照射器の発光レベルの変化を所定の単位毎に検出する
手段19と、この検出手段19が検出するレ−ザ発光レ
ベルの変化と、これらの各レベルにおける前記受光器2
の受光信号の出力回数の平均値とから受光器2を配置し
た計測点のレベルを演算する受光位置演算手段30と、
前記昇降装置の上昇方向での前記演算手段30の結果と
下降方向での演算手段30の結果との差が予め設定した
許容値を越えるときに計測異常を判定する往復値比較手
段33と、この比較手段33の異常判定時には少なくと
も前記演算手段30のレベル演算結果の無効を表示し、
再計測する制御手段31を備える。In the second invention, in FIG. 1, a light receiver 2 which is installed at a measuring point of a structure and outputs a light receiving signal by receiving a laser beam, and a laser beam is emitted in a horizontal direction. Laser irradiator 1 that horizontally turns at a predetermined speed, and this laser
A lifting device for moving the irradiator 1 up and down at a predetermined speed;
Means 19 for detecting a change in the light emission level of the laser irradiator for each predetermined unit, a change in the laser light emission level detected by the detecting means 19, and the light receiver 2 at each of these levels.
A light receiving position calculating means 30 for calculating the level of the measuring point where the light receiver 2 is arranged, from the average value of the number of times the light receiving signal is output,
A reciprocating value comparison means 33 for judging a measurement abnormality when the difference between the result of the calculation means 30 in the ascending direction of the elevating device and the result of the calculation means 30 in the descending direction exceeds a preset allowable value; At the time of judging the abnormality of the comparison means 33, at least the invalidity of the level calculation result of the calculation means 30 is displayed,
The control means 31 which measures again is provided.
【0008】[0008]
【作用】第1の発明は、受光位置演算手段がレ−ザ光線
の各発光レベルとそのレベルにおける受光器の受光回数
の積の総和を総受光回数で除した結果を計測レベルと
し、レベル分布比較手段は前記受光位置演算手段におい
て受光信号が発生したレベルの最高値と最低値との差を
予め設定した許容値と比較して、最高値と最低値の差が
許容値を越えるた場合、計測値異常と判定して前記受光
位置演算手段の演算結果を無効とするとともに、計測制
御手段により計測値の異常を表示し、昇降装置を原点に
復帰させて再度計測を行い、外乱による計測値の異常を
排除する。According to the first aspect of the invention, the light receiving position calculation means divides the sum of the products of the respective light emitting levels of the laser beam and the number of times of light reception of the light receiver at that level by the total number of times of light reception to obtain a measurement level, and the level distribution The comparing means compares the difference between the maximum value and the minimum value of the level at which the light receiving signal is generated in the light receiving position calculating means with a preset allowable value, and when the difference between the maximum value and the minimum value exceeds the allowable value, It is determined that the measurement value is abnormal and the calculation result of the light receiving position calculation means is invalidated, and the measurement control means displays the abnormality of the measurement value, the lifting device is returned to the origin, and the measurement is performed again. Eliminate abnormalities.
【0009】第2の発明は、受光位置演算手段がレ−ザ
光線の各発光レベルとそのレベルにおける受光器の受光
回数の積の総和を総受光回数で除した結果を計測レベル
とし、この計測レベルを昇降装置の上昇方向及び下降方
向のそれぞれで算出し、さらに往復値比較手段でこれら
レベルの差を算出し、この算出した差と予め設定した許
容値とを比較し、この差が許容値を越えると前記受光位
置演算手段の演算結果を無効とするとともに、計測値異
常と判定して計測制御手段により表示装置に計測値の異
常を表示し、昇降装置を原点に復帰させて再度計測を行
い、外乱による計測値の異常を排除する。According to a second aspect of the present invention, the light receiving position calculation means divides the sum of products of the respective light emitting levels of the laser beam and the number of times of light reception of the light receiver at that level, by dividing the result by the total number of times of light reception, and this measurement level is obtained. The level is calculated in each of the ascending and descending directions of the lifting device, and the difference between these levels is further calculated by the reciprocating value comparison means, and the calculated difference is compared with a preset allowable value. When it exceeds the value, the calculation result of the light receiving position calculation means is invalidated, the measurement value is judged to be abnormal and the measurement control means displays the abnormality of the measured value on the display device, and the lifting device is returned to the origin to measure again. Perform to eliminate abnormal measurement values due to disturbance.
【0010】[0010]
【実施例】以下、図面に従って本発明の実施例を説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【0011】図2において、1はレ−ザ光線を照射する
レ−ザ照射器1で、レ−ザ光線を受光する数多くの受光
器2がレ−ザ照射器の周囲の各計測点に配置される。In FIG. 2, reference numeral 1 denotes a laser irradiator 1 for irradiating a laser beam, and a large number of light receivers 2 for receiving the laser beam are arranged at respective measuring points around the laser irradiator. To be done.
【0012】受光器2はレ−ザ光線を受光することで電
気的な信号を出力する単一の受光素子を備える。この受
光素子には例えばフォトトランジスタやフォトダイオー
ドが使用される。The light receiver 2 has a single light receiving element which outputs an electric signal by receiving a laser beam. A phototransistor or a photodiode is used for this light receiving element, for example.
【0013】レ−ザ照射器1は昇降装置15に支持さ
れ、レ−ザ光線を水平方向に発射しながら所定の速度で
水平に旋回する。The laser irradiator 1 is supported by a lifting device 15 and horizontally oscillates at a predetermined speed while emitting a laser beam in a horizontal direction.
【0014】このためにレ−ザ照射器1は所定の一定速
度で回転する旋回用モータを備える。また、昇降装置1
5との間に水平調整装置4を備える。水平調整装置4は
直交する水平の回転軸まわりにそれぞれレ−ザ照射器1
を回転させるモータと、各軸回りのレ−ザ照射器1の傾
斜角度を検出する傾斜センサを備え、制御装置20が傾
斜センサの検出角度に基づき各モータを駆動することに
より、レ−ザ照射器1を水平に維持する。For this purpose, the laser irradiator 1 is equipped with a turning motor which rotates at a predetermined constant speed. Also, the lifting device 1
A leveling device 4 is provided between the device 5 and the device. The level adjuster 4 is arranged around the orthogonal horizontal rotation axes, and the laser irradiator 1 is provided.
And a tilt sensor for detecting the tilt angle of the laser irradiator 1 around each axis, and the controller 20 drives each motor based on the angle detected by the tilt sensor, thereby irradiating the laser. Keep vessel 1 horizontal.
【0015】また、昇降装置15は例えばモータの回転
により送りがかかるねじ機構などで構成され、所定の一
定速度で伸縮する。なお、昇降装置15は油圧シリンダ
などで構成することもできる。The elevating device 15 is composed of, for example, a screw mechanism which is fed by rotation of a motor, and expands and contracts at a predetermined constant speed. The lifting device 15 can also be configured by a hydraulic cylinder or the like.
【0016】昇降装置15と並列に上下位置検出器19
が設けられる。上下位置検出器19はレ−ザ照射器1の
発光レベルが所定の計測単位Δh変化するごとに、その
レベルを検出し、制御装置20に高さ信号として出力す
る。A vertical position detector 19 in parallel with the lifting device 15.
Is provided. Each time the light emission level of the laser irradiator 1 changes by a predetermined measurement unit Δh, the vertical position detector 19 detects the level and outputs it to the controller 20 as a height signal.
【0017】制御装置20には前述の傾斜センサの出力
する傾斜信号に基づきモータを駆動してレ−ザ照射器1
を水平に維持すると共に昇降装置15を駆動し、同時に
前記上下位置検出器19、受光器2の出力に基づいて計
測点のレベルを演算し、また、この計測が正常に行われ
たかどうかを判断し、異常時にはエラーを表示するとと
もに再計測を行う。The control unit 20 drives the motor based on the tilt signal output from the tilt sensor to drive the laser irradiator 1.
Is kept horizontal and the elevating device 15 is driven, and at the same time, the level of the measurement point is calculated based on the outputs of the vertical position detector 19 and the photodetector 2, and it is determined whether or not this measurement is normally performed. If an error occurs, the error is displayed and remeasurement is performed.
【0018】制御装置20は、受光器2によるレ−ザ光
線の受光期間内に上下位置検出器19が検出するレ−ザ
発光レベルと、これらの各レベルにおける受光信号の出
力回数の平均値とから受光器2を設置した計測点のレベ
ルを演算する。すなわち、レ−ザ発光レベルとそのレベ
ルにおける受光信号の出力回数との積を各レベルについ
て合計し、これを受光信号の出力総数で除することによ
り、計測点のレベルを演算する。The control device 20 detects the laser light emission levels detected by the vertical position detector 19 during the light receiving period of the laser beam by the light receiver 2 and the average value of the number of times the light receiving signal is output at each of these levels. Then, the level of the measuring point where the light receiver 2 is installed is calculated. That is, the product of the laser emission level and the number of times the light receiving signal is output at that level is summed for each level, and this is divided by the total number of outputs of the light receiving signal to calculate the level at the measurement point.
【0019】そして、前記受光位置演算手段において受
光信号が発生した各レベルについて、これらレベルの最
高値と最低値の差を演算し、演算結果が所定の範囲内に
あるかを比較し、範囲外の場合は計測異常と判定し、再
計測を行わせる。Then, for each level at which the light receiving signal is generated in the light receiving position calculating means, the difference between the highest value and the lowest value of these levels is calculated, and it is compared whether or not the calculation result is within a predetermined range. In the case of, it is determined that the measurement is abnormal, and the measurement is performed again.
【0020】さらに、レ−ザ照射器1の上昇中に算出し
た計測レベルと下降中に算出した計測レベルとの差を演
算し、この演算結果が所定の範囲内にあるかを判断し、
範囲外のときは前記と同様に計測異常と判断し、エラー
を表示するとともに再計測を行う。Further, the difference between the measurement level calculated while the laser irradiator 1 is rising and the measurement level calculated when the laser irradiator 1 is descending is calculated, and it is judged whether or not the calculation result is within a predetermined range.
When it is out of the range, it is judged that the measurement is abnormal as in the above case, an error is displayed and the measurement is performed again.
【0021】図6のフローチャートを参照してさらに詳
しく説明する。A more detailed description will be given with reference to the flowchart of FIG.
【0022】ステップ50で計測が開始されると、昇降
装置15に支持されたレ−ザ照射器1は、所定の速度で
例えば最低位置(以下原点とする)から上昇し、所定の
速度で旋回しながらレ−ザ光線を水平方向に発射し、こ
のレ−ザ光線が受光器2に入ると受光器2が受光信号を
制御装置20に出力する。When the measurement is started in step 50, the laser irradiator 1 supported by the elevating device 15 rises from a lowest position (hereinafter referred to as an origin) at a predetermined speed and turns at a predetermined speed. Meanwhile, the laser beam is emitted in the horizontal direction, and when this laser beam enters the photodetector 2, the photodetector 2 outputs a photodetection signal to the control device 20.
【0023】ところで、レ−ザ照射器1の発射するレ−
ザ光線は円形断面の平行レ−ザ光線であることから、受
光器2は図3で示すようにレ−ザ光線の中心が、高さh
a±αの範囲に入るとレ−ザ光線を受光し、受光信号を
出力する。By the way, the laser emitted by the laser irradiator 1
Since the laser beam is a parallel laser beam having a circular cross section, the center of the laser beam of the photodetector 2 has a height h as shown in FIG.
When it falls within the range of a ± α, it receives the laser beam and outputs a received light signal.
【0024】その結果、レ−ザ光線がこの高さ範囲にあ
る間は、受光器2はレ−ザ照射器1の旋回速度に応じた
一定の間隔で制御装置20に受光信号を出力する。ま
た、レ−ザ照射器1のレ−ザ発光レベルが図4に示すΔ
hずつ上昇するごとに上下位置検出器19から新たなレ
−ザ発光レベルを示す高さ信号が制御装置20に入力さ
れる。As a result, while the laser beam is in this height range, the photodetector 2 outputs a photodetection signal to the controller 20 at a constant interval according to the turning speed of the laser irradiator 1. The laser emission level of the laser irradiator 1 is Δ shown in FIG.
A height signal indicating a new laser emission level is input from the vertical position detector 19 to the control device 20 every time the height is increased by h.
【0025】つまり、受光信号の出力範囲であっても上
下位置検出器19が検出するレ−ザ発光レベルは微妙に
変化するので、一個の高さ信号のみでは受光器2のレベ
ルを正確に決定することはできない。That is, since the laser emission level detected by the vertical position detector 19 changes subtly even within the output range of the light receiving signal, the level of the light receiving device 2 can be accurately determined with only one height signal. You cannot do it.
【0026】そこで、制御装置20は上記入力信号に基
づいて次の方法で受光器2のレベルを演算する。Therefore, the control unit 20 calculates the level of the photodetector 2 by the following method based on the input signal.
【0027】まず図4に示す単位高さΔhずつ異なる各
レ−ザ発光レベルにおいて同一の受光器2から入力され
る受光信号のパルス数n1、n2、n3、...nnをカウ
ントし、次にこの単位高さΔhごとに高さ信号の中心値
h1、h2、h3、...hnを求める。そして、これらの
値に基づいて、下記の計算を行って受光器2のレベルを
求める。First, the number of pulses n 1 , n 2 , n 3 , ... Of the light receiving signals input from the same light receiving device 2 at each laser light emitting level different by unit height Δh shown in FIG. . . n n is counted, and then, for each unit height Δh, the center values h 1 , h 2 , h 3 ,. . . Find h n . Then, based on these values, the following calculation is performed to obtain the level of the light receiver 2.
【0028】[0028]
【数1】 [Equation 1]
【0029】しかし、上式によって求められる受光器2
のレベルhaは、図7に示す正常時の計測値のような平
行レ−ザ光線の半径に基づく検出高さのばらつきを排除
しただけであり、外乱による計測誤差は排除されていな
い。However, the photodetector 2 obtained by the above equation
The level ha is only the variation in the detected height based on the radius of the parallel laser beam, such as the measured value in the normal state shown in FIG. 7, is eliminated, and the measurement error due to the disturbance is not eliminated.
【0030】そこで、ステップ51では、外乱による計
測の乱れを除去する。例えば、上昇方向でのレベル計測
中に構造物の付近を大型車両などが通過すると、図4で
示すようにレ−ザ照射器1の振動によりレーザー光線も
振動して、受光器2の受光信号及び受光信号が発生する
レベル範囲が図7で示す正常時に較べて大きく乱れてし
まい、このまま上式で受光器2のレベルを求めると、実
際のレベルと異なる計算結果となる。Therefore, in step 51, the measurement disturbance due to the disturbance is removed. For example, when a large vehicle or the like passes near a structure during level measurement in the ascending direction, the laser beam also vibrates due to the vibration of the laser irradiator 1 as shown in FIG. The level range in which the received light signal is generated is more disturbed than in the normal state shown in FIG. 7, and if the level of the light receiver 2 is obtained by the above equation as it is, a calculation result different from the actual level is obtained.
【0031】高さ信号hiの最低値h1と最高値hnを検
出して、次式により高さ信号の分布範囲であるΔHiを
求める。The minimum value h 1 and the maximum value h n of the height signal h i are detected, and ΔHi which is the distribution range of the height signal is obtained by the following equation.
【0032】ΔHi = |hn − h1|[0032] ΔHi = | h n - h 1 |
【0033】次にステップ51で上式で求めたΔHiと
予め設定した高さ信号の分布範囲の許容値ΔHlとの比
較を行い、ΔHiが許容値ΔHlを越えていると算出し
たレベルを無効とするとともに計測値が異常であること
の信号を出力し、制御装置20の図示しない表示装置で
エラーを表示させ(ステップ60)、昇降装置15を原
点に復帰させて再度計測を行う。Next, in step 51, ΔHi obtained by the above equation is compared with a preset value ΔHl of the distribution range of the height signal, and the calculated level is invalidated if ΔHi exceeds the allowable value ΔHl. At the same time, a signal indicating that the measured value is abnormal is output, an error is displayed on a display device (not shown) of the control device 20 (step 60), the elevating device 15 is returned to the origin, and measurement is performed again.
【0034】ステップ51で計測値に異常がなければ上
昇方向、下降方向でそれぞれレベルを計測し、原点に復
帰して計測を終了する(ステップ52)。If there is no abnormality in the measured value at step 51, the level is measured in the ascending direction and the descending direction respectively, and the measurement is completed after returning to the origin (step 52).
【0035】しかし、前記レベル分布比較で排除できる
外乱による計測値の異常は、振動などによりレーザー光
線が乱れた場合であり、レーザー光線が障害物により遮
断された場合の計測値の異常は排除されていない。However, the abnormality in the measured value due to the disturbance that can be eliminated by the level distribution comparison is when the laser beam is disturbed by vibration or the like, and the abnormality in the measured value when the laser beam is blocked by an obstacle is not eliminated. .
【0036】例えば、レ−ザ照射器1の上昇方向での計
測中にレ−ザ照射器1と受光器2との間を作業用車両あ
るいは作業員の通過などによってレ−ザ光線が一時的に
遮断された場合、図5の実線で示す部分が計測値とな
る。For example, during measurement of the laser irradiator 1 in the ascending direction, the laser beam is temporarily passed between the laser irradiator 1 and the light receiver 2 by a work vehicle or a worker passing therethrough. When it is cut off, the portion indicated by the solid line in FIG. 5 becomes the measured value.
【0037】すなわち、レ−ザ光線が遮断されたため
に、受光器2で受光信号が検出されるレベルの最高値は
hnとなり、本来なら計測できるレベルの最高値hn′ま
での計測値が欠落してしまい、誤差のある計測レベルを
出力する。That is, since the laser beam is cut off, the maximum value of the level at which the light receiving signal is detected by the photodetector 2 becomes h n , and the measured values up to the maximum value h n ′ of the level that can be measured originally. Outputs a measurement level that is missing and has an error.
【0038】そこで、上昇方向での計測で受光器2のレ
ベルをhaU、下降方向での計測で受光器2のレベルを
haDとし(ステップ53、54)、往復して計測した
受光器2のレベルの誤差ΔMiを次式により算出する。Therefore, the level of the photodetector 2 is set to ha U in the measurement in the ascending direction and the level of the photodetector 2 is set to ha D in the measurement in the descending direction (steps 53 and 54). The error ΔMi of the level is calculated by the following equation.
【0039】ΔMi = |haU−haD|ΔMi = | ha U −ha D |
【0040】次にステップ55において、上式で求めた
誤差ΔMiと予め設定した誤差の許容範囲ΔMlとを比
較を行い、ΔMiが許容値ΔMlを越えている場合は、
算出したhaU及びhaDを無効とするとともに計測値が
異常であることの信号を出力し、制御装置20の図示し
ない表示装置でエラーを表示させ(ステップ60)、昇
降装置15を原点に復帰させて再度計測を行う。Next, at step 55, the error ΔMi obtained by the above equation is compared with a preset allowable error range ΔMl. If ΔMi exceeds the allowable value ΔMl,
The calculated ha U and ha D are invalidated, a signal indicating that the measured value is abnormal is output, an error is displayed on the display device (not shown) of the control device 20 (step 60), and the lifting device 15 is returned to the origin. And measure again.
【0041】このようにして算出された受光器2のレベ
ルから振動などによる計測値の異常を排除し、さらにレ
−ザ光線の遮断による計測値の異常を排除するため、計
測の対象となるすべての受光器2についてレベルを高精
度で計測することができる。From the level of the photodetector 2 calculated in this way, an abnormality in the measured value due to vibration or the like is excluded, and further, an abnormality in the measured value due to the interruption of the laser beam is excluded. The level of the photodetector 2 can be measured with high accuracy.
【0042】[0042]
【発明の効果】以上のように第1の発明によれば、レ−
ザ受光期間中の各レ−ザ発光レベルにおける受光信号の
出力回数とそのレベルの分布が適正であるかを判定し、
判定結果が不適正である場合は演算したレベルを無効と
するとともに制御装置で計測値の異常を表示し、昇降装
置を原点に復帰させて再度計測するため、構造物の振動
による計測値の異常を排除して精度及び信頼性の高いレ
ベル計測を行うことが可能となる。As described above, according to the first invention,
Determine whether the output frequency of the received light signal at each laser emission level during the light receiving period and the distribution of that level are appropriate,
If the judgment result is incorrect, the calculated level is invalidated, and the control device displays an anomaly in the measured value, and the lifting device is returned to the origin to measure again. It becomes possible to perform high-accuracy and reliable level measurement by eliminating.
【0043】また、第2の発明によれば1カ所の受光器
についてレ−ザ光線の上昇方向と下降方向でそれぞれレ
ベルを演算し、これらレベルの差が適正であるかを判定
し、判定結果が不適正である場合は前記演算したレベル
を無効とするとともに制御装置で計測値の異常を表示
し、昇降装置を原点に復帰させて再度計測するため、偶
発的なレ−ザ光線の遮断による計測値の異常を排除して
精度及び信頼性の高いレベル計測を行うことが可能とな
る。According to the second aspect of the invention, the level is calculated for each of the light receivers at one location in the ascending and descending directions of the laser beam, and it is judged whether the difference between these levels is appropriate. If is not appropriate, the calculated level is invalidated, and the control device displays an abnormality in the measured value, and the lifting device is returned to the origin to perform measurement again, so that the laser beam is accidentally cut off. It becomes possible to eliminate abnormalities in measured values and perform level measurement with high accuracy and reliability.
【図1】本発明のクレーム対応図である。FIG. 1 is a diagram corresponding to a claim of the present invention.
【図2】本発明の実施例を示す構成図である。FIG. 2 is a configuration diagram showing an embodiment of the present invention.
【図3】受光器2の受光範囲を示す説明図である。FIG. 3 is an explanatory diagram showing a light receiving range of a light receiver 2.
【図4】外乱によって乱れた受光信号パルスと高さ信号
との関係を示すグラフである。FIG. 4 is a graph showing a relationship between a received light signal pulse disturbed by a disturbance and a height signal.
【図5】一部が欠落した受光信号パルスと高さ信号との
関係を示すグラフである。FIG. 5 is a graph showing a relationship between a light receiving signal pulse partially lacking and a height signal.
【図6】制御装置における制御のフローチャートであ
る。FIG. 6 is a flowchart of control in the control device.
【図7】正常な受光信号パルスと高さ信号との関係を示
すグラフである。FIG. 7 is a graph showing a relationship between a normal light receiving signal pulse and a height signal.
【符号の説明】 1 レ−ザ照射器 2 受光器 15 昇降装置 19 上下位置検出器 20 制御装置 30 受光位置演算手段 32 往復値比較手段 33 レベル分布比較手段[Explanation of Codes] 1 laser irradiator 2 light receiver 15 lifting device 19 vertical position detector 20 control device 30 light receiving position calculation means 32 reciprocating value comparison means 33 level distribution comparison means
Claims (2)
受光により受光信号を出力する受光器と、レ−ザ光線を
水平方向に照射しながら所定の速度で水平旋回するレ−
ザ照射器と、このレ−ザ照射器を所定の速度で上下させ
る昇降装置と、レ−ザ照射器の発光レベルの変化を所定
の単位毎に検出する手段と、この検出手段が検出する各
レ−ザ発光レベルにおける前記受光器の受光信号の出力
回数の平均値とから受光器を配置した計測点のレベルを
演算する受光位置演算手段と、受光レベルの最高値と最
低値の差が予め設定した許容値を越えるときに計測異常
を判定するレベル分布比較手段と、この比較手段の異常
判定時には少なくとも前記演算手段のレベル演算結果の
無効を表示し、再計測する制御手段を備えたことを特徴
とする構造物レベル計測装置。1. A light receiver which is installed at a measuring point of a structure and outputs a light reception signal by receiving a laser beam, and a laser which horizontally turns at a predetermined speed while irradiating the laser beam in a horizontal direction.
A laser irradiator, an elevating device for moving the laser irradiator up and down at a predetermined speed, a means for detecting a change in the light emission level of the laser irradiator for each predetermined unit, and a means for detecting each by the detecting means. The light receiving position calculating means for calculating the level of the measuring point where the light receiver is arranged from the average value of the number of times the light receiving signal of the light receiver is output at the laser light emitting level, and the difference between the highest and lowest light receiving levels are previously A level distribution comparing means for determining a measurement abnormality when the set allowable value is exceeded and a control means for displaying and invalidating the level calculation result of at least the calculating means at the time of abnormality determination of the comparing means are provided. Characteristic structure level measuring device.
受光により受光信号を出力する受光器と、レ−ザ光線を
水平方向に照射しながら所定の速度で水平旋回するレ−
ザ照射器と、このレ−ザ照射器を所定の速度で上下させ
る昇降装置と、レ−ザ照射器の発光レベルの変化を所定
の単位毎に検出する手段と、この検出手段が検出するレ
−ザ発光レベルの変化と、これらの各レベルにおける前
記受光器の受光信号の出力回数の平均値とから受光器を
配置した計測点のレベルを演算する受光位置演算手段
と、前記昇降装置の上昇方向での前記演算手段の結果と
下降方向での演算手段の結果との差が予め設定した許容
値を越えるときに計測異常を判定する往復値比較手段
と、この比較手段の異常判定時には少なくとも前記演算
手段のレベル演算結果の無効を表示し、再計測する制御
手段を備えたことを特徴とする構造物レベル計測装置。2. A light receiver which is installed at a measuring point of a structure and outputs a light reception signal by receiving a laser beam, and a laser which horizontally turns at a predetermined speed while irradiating the laser beam in a horizontal direction.
A laser irradiator, an elevating device for moving the laser irradiator up and down at a predetermined speed, a means for detecting a change in the light emission level of the laser irradiator for each predetermined unit, and a laser for detecting by this detecting means. -The light receiving position calculation means for calculating the level of the measurement point at which the light receiver is arranged based on the change in the light emission level and the average value of the number of times of the light reception signal output from the light receiver at each of these levels, and the elevating device. Direction comparison means for determining a measurement abnormality when the difference between the result of the calculation means in the direction and the result of the calculation means in the descending direction exceeds a preset allowable value, and at least the above-mentioned value at the time of the abnormality determination of the comparison means. A structure level measuring device comprising a control means for displaying invalidity of a level calculation result of the calculation means and re-measurement.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3264036A JP3014833B2 (en) | 1991-10-11 | 1991-10-11 | Structure level measuring device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3264036A JP3014833B2 (en) | 1991-10-11 | 1991-10-11 | Structure level measuring device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0694458A true JPH0694458A (en) | 1994-04-05 |
JP3014833B2 JP3014833B2 (en) | 2000-02-28 |
Family
ID=17397661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3264036A Expired - Lifetime JP3014833B2 (en) | 1991-10-11 | 1991-10-11 | Structure level measuring device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3014833B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100440980B1 (en) * | 2002-02-22 | 2004-07-21 | 조주현 | Automatic horizontal control apparatus for laser the machine level |
KR101534812B1 (en) * | 2014-08-28 | 2015-07-09 | 김지용 | Device for Generating Point |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102798377B (en) * | 2012-08-07 | 2014-07-09 | 张东光 | Planar error measurement analysis system and method |
-
1991
- 1991-10-11 JP JP3264036A patent/JP3014833B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100440980B1 (en) * | 2002-02-22 | 2004-07-21 | 조주현 | Automatic horizontal control apparatus for laser the machine level |
KR101534812B1 (en) * | 2014-08-28 | 2015-07-09 | 김지용 | Device for Generating Point |
Also Published As
Publication number | Publication date |
---|---|
JP3014833B2 (en) | 2000-02-28 |
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