STATE DETECTION DEVICE AND STATE DETECTION METHOD FOR TRANSMISSION PORTION IN ELECTROMAGNETIC WAVE SCANNING DEVICE

• Main Authors: OIKAMI SHUN, MIYANABE SHIYOUGO
• Format: Patent
• Language: English; Japanese
• Published: 11.10.2021
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

To allow the state of a transmission portion to be detected in a device that emits electromagnetic waves to the outside via the transmission portion.SOLUTION: A lidar 100 includes an emission unit 110, a half mirror 120, an MEMS mirror 130, a drive unit 140, a transmission portion 150, a receiving unit 160, and a calculation unit 170. The calculation unit 170 includes a detection unit 171, a measurement control unit 172, and a state detection unit 173. The detection unit 171 detects a received light signal output by the receiving unit 160 and outputs it to the measurement control unit 172. The state detection unit 173 acquires received light intensity of return light estimated to be reflected by the transmission portion 150 for each emission angle, and detects the state of the transmission portion 150 by comparing the received light intensity with prerecorded initial received light intensity distribution data 174.SELECTED DRAWING: Figure 1 【課題】透過部を介して電磁波を外部に放出する装置において、透過部の状態を検出できるようにする。【解決手段】Ｌｉｄａｒ１００は、出射部１１０、ハーフミラー１２０、ＭＥＭＳミラー１３０、駆動部１４０、透過部１５０、受信部１６０、演算部１７０を備えている。演算部１７０は、検出部１７１、測定制御部１７２、状態検出部１７３を備えている。検出部１７１は、受信部１６０が出力する受光信号を検出し、測定制御部１７２に出力する。状態検出部１７３は、透過部１５０で反射したと推定される戻り光の受光強度を出射角度毎に取得し、あらかじめ記録された初期受光強度分布データ１７４と比較することで透過部１５０の状態を検出する。【選択図】図１