Working method of navigating instrument with relatively high accuracy
A working method and navigator technology, which is applied to road network navigators, navigation, surveying and navigation, etc., can solve the problems of large pressure differences, large errors, and large differences in results of air pressure sensors, and achieve high accuracy and reliability. Effect
Active Publication Date: 2015-01-14
CHANGZHOU SHINCO AUTOMOTIVE ELECTRONICS
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The weak point of above-mentioned prior art is: on the one hand, adopt GPS signal to calculate height, often error is bigger, because the precision of civil GPS signal is generally low, can't accurately draw the height of current vehicle
On the other hand, the use of air pressure sensors to detect the air pressure at the location of the vehicle is often inaccurate.
When the vehicle is stationary and driving, the pressure acting on the air pressure sensor is quite different, resulting in a large difference in the measured results
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018] Below in conjunction with accompanying drawing and embodiment the present invention is described in detail:
[0019] Such as figure 1 , the navigator of the present embodiment includes: a CPU unit, a map generation and display unit with a touch screen connected to the CPU unit, a voice output unit connected to the CPU unit, an air pressure sensor connected to the CPU unit, a A connected vehicle speed measuring unit, a GPS unit connected with the CPU unit, a program database connected with the CPU unit, a temperature and humidity sensor connected with the CPU unit, and a map database connected with the CPU unit. Road path information is stored in the map database, and the road path information includes the attributes of each road section, and the attribute includes information about whether the corresponding road section includes an elevated section that is parallel up and down and an elevated downlink section.
[0020] The vehicle speed measuring unit includes: a plura...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a working method of a navigating instrument with relatively high accuracy. The working method comprises the steps that when a CPU of the navigating instrument detects to find that a vehicle serving as a navigating instrument carrier is to be driven onto a road segment comprising an elevated road segment and an elevated downhill road segment which are vertically parallel, all windows of the vehicle are controlled to be completely closed by a control unit of the CPU through vehicle window detection, and then, the driving speed of the vehicle in the process of driving onto the road segment and the change of air pressure in the vehicle are detected; if the driving speed is not changed, but the air pressure in the vehicle is reduced, the vehicle is judged to be located on the elevated road segment at present; and if the driving speed is not changed, and the air pressure in the vehicle is not reduced, the vehicle is judged to be located on the elevated downhill road segment at present. According to the working method, whether the vehicle is located on the elevated road segment at present is judged by combining the influences of the driving speed change to the air pressure in the vehicle in the process of changing the air pressure in the vehicle. Compared with the prior art, the working method has the characteristics of relatively high accuracy and reliability.
Description
[0001] This application is a divisional application. The original invention name of the application is: the working method of navigator for road matching according to the change of air pressure in the car, application number: 201210112405.5, application date: 2012-04-17. technical field [0002] The invention relates to the technical field of the working method of the navigator, in particular to a working method for the navigator to perform road matching according to the change of the air pressure in the vehicle. Background technique [0003] In the circuit matching process of existing navigators, it is often necessary to obtain the height information of the carrier for road matching; especially for urban elevated roads, it is necessary to use height information to judge whether the current vehicle is on the elevated road or on the road below the elevated road. [0004] Chinese patent document CN101666643 discloses an altimeter based on barometric pressure measurement and sat...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/34G06F17/30
CPCG01C21/30G01C21/3415
Inventor 秦春达
Owner CHANGZHOU SHINCO AUTOMOTIVE ELECTRONICS