[특허]Land vehicle navigation system

[미국특허] Land vehicle navigation system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01S-005/02 G01S-003/02 G06F-015/50
출원번호	US-0247537 (1988-09-22)
우선권정보	JP-0236092 (1987-09-22)
발명자 / 주소	Nishikawa Kunitoshi (Nagoya JPX) Fujimoto Mitoshi (Aichi JPX) Asano Yoshikazu (Owariasahi JPX)
출원인 / 주소	Kabushiki Kaisha Toyota Chuo Kenkyusho (Aichi JPX 03)
인용정보	피인용 횟수 : 75 인용 특허 : 3

초록 ▼

A land vehicle navigation system is adapted to display the present position of a vehicle by receiving signals from a combination of satellites under the global positioning navigation system. The present position of the vehicle is displayed on a screen, superposed over map data. To obtain the best global positioning data, the combination of satellites is selected in connectio with the visibility. To perform the positive reception of signals from the satellites as the vehicle is running in an urban area, data relating to the building height around the area can be obtained from a geographical information section including data indicative of the map and the building height distribution with respect to the area to determine the visibility.

대표청구항 ▼

A land vehicle navigation system comprising: a global positioning system (GPS) for receiving and demodulating signals from a plurality of satellites to fixedly determine the present travelling position of a vehicle; a satellite position computing means for determining the position of each of said satellites, based on almanac data supplied from said global positioning system; a heading detector for continuously detecting the heading of said vehicle; a geographical information means for storing a map indicated on an area in which the vehicle is to run and data representative of the distribution of the building height at said area; a visibility computing means for determining the visibility for signals from each of the satellites, based on signals indicative of the position of each satellite from said satellite position computing means, data representative of the heading of the vehicle from said heading detector and data indicative of the distribution of the building height from said geographical information means; a satellite selecting means for selecting a combination of satellites providing the maximum visibility at said area, based on signals indicative of the visibility from said visibility computing means; and a map and present position displaying means for displaying data representative of the map from said geographical information means and the present position of the vehicle, whereby a combination of satellites providing the maximum visibility for signals to be received by said global positioning system can be selected depending on the distribution of the building height in the area in which the vehicle is running.

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[미국특허] Land vehicle navigation system 원문보기

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[미국특허] Land vehicle navigation system 원문보기

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