DISTANCE MEASURING DEVICE AND DISTANCE MEASURING METHOD

• Main Author: SHIMIZU TOMOMASA
• Format: Patent
• Language: English; Japanese
• Published: 27.06.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; GYROSCOPIC INSTRUMENTS; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; SURVEYING; TESTING

To provide a distance measuring device and a distance measuring method that can improve the accuracy of distance measurement.SOLUTION: A distance measuring device 1 irradiates an object to be measured 2 with irradiation light from a light projection unit 6 and receives reflected light reflected from the object to be measured 2 with a light receiving unit 19. A transmission time calculation unit 13 determines transmission time Tsend of the irradiation light based on a start signal Sst and an irradiation synchronization signal Sa. A receiving time calculation unit 24 determines receiving time Trecv of the reflected light based on the start signal Sst and a light receiving synchronization signal Sb. A correction value calculation unit 30 calculates a correction value Tk used for correction of the receiving time Trecv based on the waveform of a light receiving signal Va. An operation unit 4 calculates the distance between the distance measuring device and the object to be measured 2 based on the transmission time Tsend, receiving time Trecv, and correction value Tk.SELECTED DRAWING: Figure 1 【課題】測距精度を向上できる測距装置、及び測距方法を提供する。【解決手段】測距装置１は、投光部６から測定対象物２に照射光を照射し、測定対象物２から反射した反射光を受光部１９で受光する。送信時間算出部１３は、開始信号Ｓst及び照射同期信号Ｓａに基づき、照射光の送信時間Ｔsendを求める。受信時間算出部２４は、開始信号Ｓst及び受光同期信号Ｓｂに基づき、反射光の受信時間Ｔrecvを求める。補正値算出部３０は、受光信号Ｖａの波形に基づき、受信時間Ｔrecvの補正に用いる補正値Ｔｋを算出する。演算部４は、送信時間Ｔsend、受信時間Ｔrecv、及び補正値Ｔｋに基づき、測定対象物２との間の距離を演算する。【選択図】図１