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1. WO2006120857 - DISTANCE/SPEED METER AND DISTANCE/SPEED MEASUREMENT METHOD

Publication Number WO/2006/120857
Publication Date 16.11.2006
International Application No. PCT/JP2006/308304
International Filing Date 20.04.2006
IPC
G01B 9/02 2006.01
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
9Instruments as specified in the subgroups and characterised by the use of optical measuring means
02Interferometers
G01S 17/32 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02Systems using the reflection of electromagnetic waves other than radio waves
06Systems determining position data of a target
08for measuring distance only
32using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
CPC
G01B 11/026
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
11Measuring arrangements characterised by the use of optical means
02for measuring length, width or thickness
026by measuring distance between sensor and object
G01S 17/34
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02Systems using the reflection of electromagnetic waves other than radio waves
06Systems determining position data of a target
08for measuring distance only
32using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
34using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
G01S 17/58
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02Systems using the reflection of electromagnetic waves other than radio waves
50Systems of measurement based on relative movement of target
58Velocity or trajectory determination systems; Sense-of-movement determination systems
G01S 7/4808
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
4808Evaluating distance, position or velocity data
G01S 7/4915
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
491Details of non-pulse systems
4912Receivers
4915Time delay measurement, e.g. operational details for pixel components
G01S 7/4916
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
491Details of non-pulse systems
4912Receivers
4916using self-mixing in the laser cavity
Applicants
  • 株式会社 山武 YAMATAKE CORPORATION [JP]/[JP] (AllExceptUS)
  • 上野 達也 UENO, Tatsuya [JP]/[JP] (UsOnly)
Inventors
  • 上野 達也 UENO, Tatsuya
Agents
  • 山川 政樹 YAMAKAWA, Masaki
Priority Data
2005-13498006.05.2005JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) DISTANCE/SPEED METER AND DISTANCE/SPEED MEASUREMENT METHOD
(FR) COMPTEUR DE DISTANCE/VITESSE ET PROCEDE DE MESURE DE DISTANCE/VITESSE
(JA) 距離/速度計および距離/速度計測方法
Abstract
(EN)
A laser driver (4) operates a semiconductor laser (1) so that a first oscillation period when the oscillation wavelength monotonously increases and a second oscillation period when the oscillation wavelength monotonously decreases alternately exist. A photo diode (2) converts a laser light emitted from the semiconductor laser (1) and return light from a measurement object (12) into electric signals. A counting unit (13) counts the number of interference waveforms obtained from an output signal of the photo diode (2) for each of the first oscillation period and the second oscillation period. Calculation means (9) calculates the distance to the measurement object (12) and the speed of the measurement object (12) from the minimum oscillation wavelength and the maximum oscillation wavelength in the period while the number of interference waveforms is counted by the counting unit (13) and the counting results of the counting unit (13). This enables measurement the distance to the measurement object (12) in motion and the speed of the measurement object (12).
(FR)
L’invention concerne un dispositif comprenant un circuit de commande de laser (4) actionnant un laser à semi-conducteurs (1) de sorte à obtenir une première période d’oscillation caractérisée par une hausse monotone de la longueur d’onde d’oscillation et une seconde période d’oscillation caractérisée par une baisse monotone de la longueur d’onde d’oscillation. Une photodiode (2) convertit une lumière laser émise par le laser à semi-conducteurs (1) et renvoie la lumière d’un objet de mesure (12) sous forme de signaux électriques. Un compteur (13) dénombre les formes d’ondes d’interférence obtenues à partir d’un signal de sortie de la photodiode (2) pour les première et seconde périodes d’oscillation. Lorsque le compteur (13) dénombre les formes d’ondes d’interférence, un dispositif de calcul (9) calcule la distance à l’objet de mesure (12) et la vitesse de cet objet (12) à partir des longueurs d’ondes d’oscillation minimale et maximale dans la période et des résultats fournis par le compteur (13). Ceci permet de déterminer la distance à l’objet de mesure (12) en mouvement et la vitesse de cet objet (12).
(JA)
 レーザドライバ(4)は、発振波長が単調増加する第1の発振期間と単調減少する第2の発振期間とが交互に存在するように半導体レーザ(1)を動作させる。フォトダイオード(2)は、半導体レーザ(1)から放射されたレーザ光と、測定対象(12)からの戻り光とを電気信号に変換する。計数部(13)は、フォトダイオード(2)の出力信号から得られる干渉波形の数を、第1の発振期間と第2の発振期間の各々について数える。演算手段(9)は、計数部(13)によって干渉波形の数を数える期間における最小発振波長と最大発振波長と計数部(13)の計数結果とから、測定対象(12)との距離および測定対象(12)の速度を算出する。これにより、移動する測定対象(12)との距離および測定対象(12)の速度を計測することが可能となる。
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