ELECTRONIC EQUIPMENT AND PROGRAM

• Main Authors: KATAGIRI YASUHARU, KAMIIWA FUMIYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 13.08.2015
• 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; SIGNALLING; SURVEYING; TESTING; TRAFFIC CONTROL SYSTEMS

PROBLEM TO BE SOLVED: To give notice of information associated with the installation position of a target accurately at low cost even in a situation in which position information or a moving speed can not be acquired.SOLUTION: A database is stored with position information on an in-tunnel speed measurement device (e) and guide points (b), (c), and (d) provided at positions on the road in a tunnel reaching the position of the device (e). The guide point (b) is set to a position within 1 km from a position, which can be positioned by a GPS receiver, before the tunnel is entered, and distances between the guide points are set to be within 1 km. Assuming that a travel from a current position right before positioning is disabled at a tunnel entry point (a) to the guide point (b) is made at a speed right before the positioning is disabled, the current position is updated, and when each of the positions of the guide points is reached, the current is similarly updated for the next guide point. When there is no guide point, the current position is similarly updated for the in-tunnel speed measurement device. A proximity warning is given respectively when the relation between the in-tunnel speed measurement device and the current position reaches 2 km, 1 km, and 500 m. 【課題】位置情報や移動速度を取得できない状況であっても、低コストかつ的確に目的物の設置位置に関する情報の報知を行なう。【解決手段】データベースにはトンネル内速度測定装置eと装置ｅの位置へ至るトンネル内の道路上位置に設けた誘導点ｂ，ｃ，ｄの位置情報を記憶している。誘導点ｂはトンネル進入前のＧＰＳ受信器によって測位可能な位置から１ｋｍ以内の位置に設定し、各誘導点間の距離も１ｋｍ以内に設定している。トンネル進入点ａで測位不能になる直前の現在位置から誘導点ｂに向けて測位不能になる直前の速度で進行しているものとして現在位置を更新していき、各誘導点位置に到達したら次の誘導点に向けて同様に現在位置を更新する。次の誘導点がない場合にはトンネル内速度測定装置へ向けて同様に現在位置を更新する。トンネル内速度測定装置ｅとの現在位置の関係が２ｋｍ、１ｋｍ、５００ｍになった際にそれぞれ接近警報を発する。【選択図】図６