Hand-held navigation device and method for determining automobile location by automobile noise

Abstract

The invention provides a hand-held navigation device and a method for determining the location of an automobile by the automobile noise. The hand-held navigation device comprises a memory, a display for displaying map information and navigational instructions, a microphone for inputting a sound signal to the hand-held navigation device, and a processor for controlling the operation of the hand-held navigation device and determining the speed of the automobile. The processer receives and analyzing the sound signal from the microphone for determining the speed. When the hand-held navigation device does not receive the Global Positioning System (GPS) satellite signal, the processor determines the speed of the moving automobile according to the received and analyzed sound signal, and estimates the present location of the automobile based on the speed of the automobile.

Description

technical field [0001] The present invention relates to a hand-held navigation device, in particular to a hand-held navigation device and method for judging the position of the car based on the noise of the car. Background technique [0002] Navigation devices with built-in Global Positioning System (GPS) are well known and widely used in car navigation devices. The general function of the navigation device includes providing a map database for generating navigation instructions on the display of the navigation device, and the navigation device is usually fixed on the dashboard or embedded into the dashboard. [0003] The term "navigation device" means a device capable of assisting a user in navigating to a predetermined destination. Navigation devices have an internal system for receiving location information, such as a GPS receiver, or a receiver that can be connected to receive location information. The navigation device itself can calculate the navigation route by itse...

AI Technical Summary

Problems solved by technology

[0007] Unfortunately, the prior art hand-held navigation device 10 has a number of disadvantages when it must be connected to the car connector 20

First, the technical level of connecting the car connector 20 is beyond the operation level of most consumers

The second problem is that the average consumer prefers a clean and neatly arranged line environment, and does not like many lines and cables connected between devices

The third problem is that the circuits required to read the driving speed, the protection / isolation circuit 26, and the signal conversion circuit 28 will greatly increase the overall cost of the handheld navigation device 10

[0008] This shows that the above-mentioned existing hand-held navigation device obviously still has inconvenience and defects in product structure, manufacturing method and use, and needs to be further improved urgently

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable structure and method for general products and methods to solve the above-mentioned problems. This is obviously a problem that relevant industry players are eager to solve

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