I lost my car navigation card. How to make it?

Hello, I'm from this industry, and I can tell you:

1. You'd better find a refit shop. It's troublesome to find a refit shop. You need to download a map port viewer, put in a navigation card and plug it into the machine. You will see the port number of your machine, which is generally 1.4800 2.4800 for normal definition and 1.9600 2.9600 for high definition.

2. Then download a port modifier with port modification.

3. Download a navigation that you think is the latest. JOF is advanced now, and JOE can use it, too. Then use the port modifier to open this map, modify the port of your machine and put it in the machine. Note: you can use it without changing the port, but there is no signal.

I've tried very hard. Give me a compliment. Take it.

With the function of GPS global positioning system, you can know your exact position anytime and anywhere while driving. Car navigation has the functions of automatic voice navigation and optimal path search. , so that you can travel all the way quickly, and the integrated office and entertainment functions make you travel easily and efficiently! General car navigation functions include DVD playing, radio receiving, Bluetooth hands-free, touch screen, optional function, intelligent track reversing, tire pressure detection function, virtual six-disc, and background control function!

First, according to the vehicle navigation classification:

1, DVD navigation for special vehicles: one for each machine (most of them need to remove the original car CD).

2. Universal type: various models can be retrofitted with frame.

3. Split machine: special navigation subdivision products for special vehicles, upgrade DVD navigation products, and do not need to disassemble the original car CD and other parts.

Second, according to the use of functional navigation classification:

1, traditional handwriting navigation

2. Voice navigation:

1), real voice navigation for secretarial services;

First, Bluetooth push-to-talk voice navigation

Advantages: directly connect the car navigation host with the Bluetooth of the mobile phone. After Bluetooth is connected for the first time, it will connect automatically in the future. Stable signal and reliable quality;

B, add a communication box for voice control navigation;

Disadvantages: the signal receiving module of the communication box is incomparable to the signal receiving module of several thousand yuan mobile phones. When the signal is bad, the mobile phone has a signal but the car navigation may not have a signal, causing more customer complaints. In addition, compared with Bluetooth push-to-talk, it needs to be equipped with a communication box and a telephone card, which is very troublesome;

2) Voice-controlled navigation and man-machine dialogue;

Disadvantages: the recognition rate of speech recognition software is not high;

Fold and edit the system functions of this paragraph.

Detailed description of functional modules

Precise positioning of GPS navigation satellite, optimal path search, automatic voice prompt.

Navigation mode, multi-purpose input, more than five self-defined path retrieval modes, site setting mode and map positioning mode.

The national map provides electronic maps of thousands of cities across the country, providing the latest map support, making navigation more accurate and allowing you to travel unimpeded.

Route planning provides route planning for departure and destination, and sets the functions of passing and avoiding.

Voice prompt friendly real voice prompt, automatically broadcast road names while driving.

Music appreciation, audio-visual enjoyment, relieve fatigue.

The powerful resource management function of file management.

Positioning principle of folding editing this paragraph

GPS consists of 24 working satellites, which are located above 20200km from the earth's surface and evenly distributed on six orbital planes (4 satellites per orbital plane), with an orbital inclination of 55. In addition, there are four active backup satellites in orbit. The distribution of satellites makes it possible to observe more than four satellites anywhere in the world at any time, and maintain a geometric image with good positioning accuracy. This provides a global navigation capability that is continuous in time.

Because the position of satellite is accurately known, we can get the distance from satellite to receiver in GPS observation. Using three-dimensional coordinates and the distance formula in three satellites, three equations can be formed to solve the position (x, y, z) of the observation point. Considering the error between satellite clock and receiver clock, there are actually four unknowns, X, Y, Z and clock difference, so it is necessary to introduce a fourth satellite to form four equations to solve, so as to get the latitude, longitude and elevation of the observation point.

In fact, receivers can often lock on more than four satellites. At this time, the receiver can be divided into several groups with four satellites in each group according to the constellation distribution of satellites, and then the group with the smallest error can be selected by algorithm to locate, which improves the accuracy.

Due to the error of satellite orbit and satellite clock, the influence of atmospheric troposphere and ionosphere on signals, and artificial SA protection policy, the positioning accuracy of civil GPS is only 100 meters. In order to improve the positioning accuracy, differential GPS(DGPS) technology is widely used to establish a reference station (differential substation) for GPS observation. By comparing the precise coordinates of the known reference station with the observed values, a correction number is obtained and released. After receiving the correction number, the receiver compares it with its own observation value to eliminate most errors and get a more accurate position. Experiments show that the positioning accuracy can be improved to 5 meters by using differential GPS.

Collapse and edit this paragraph combination.

Vehicle navigation system is mainly composed of navigation host and navigation display terminal. The built-in GPS antenna will receive data information from at least three of the 24 GPS satellites orbiting the earth, so as to determine the current position of the car. By matching the position coordinates determined by the navigation host through GPS satellite signals with the electronic map data, the accurate position of the car in the electronic map can be determined.

On this basis, it will realize many functions, such as driving navigation, route recommendation, information inquiry, playing AV/TV and so on. The driver only needs to look at the picture on the display screen, listen to the voice prompt and manipulate the remote control in his hand, so as to realize the above functions and drive easily.

Automobile GPS navigation system consists of two parts:

Part of it consists of GPS receiver and display equipment installed in the car; The other part is composed of computer control center, and the two parts are connected by positioning satellites.

The computer control center is authorized by the motor vehicle management department and is responsible for observing the dynamics and traffic conditions of designated monitoring vehicles within its jurisdiction at any time. Therefore, the whole car navigation system has at least two functions: first, the car trail monitoring function, as long as the coded GPS receiver is installed on the car, the car can indicate its position through the electronic map of the computer control center no matter where it travels; The other is the driver's guidance function. Car owners can store electronic maps of traffic routes in various areas on floppy disks. As long as the floppy disk is inserted into the vehicle receiving device, the position and current traffic state of the vehicle will be displayed on the display screen immediately. You can not only enter the destination you want to go to, but also work out the best driving route in advance. You can accept the instructions from the computer control center to choose the driving route and direction of the vehicle.

Collapse and edit the system elements in this paragraph.

Folding background

Geosynchronous satellites located above the earth were originally used for military and aviation navigation. The U.S. government relaxed the restrictions on the use of synchronous satellites in the 1980s, which opened up a new world for its wide adoption. Subsequent commercial communication satellites greatly improved the accuracy and coverage of communication satellites.

Since the advent of highways, there have been maps to guide people. However, as a guide for people, maps often become a source of tension between people. Because the printed map often can't keep up with the changes of the street, it is difficult to identify, which will lead the driver to blame the people in the car next to him for not reading the map and not providing accurate instructions. Therefore, a satellite navigation system that can accurately and timely navigate and locate cars by using satellite signals at high altitude has become priceless.

In recent years, the development of car navigation system is very rapid. At present, people can not only choose the navigation system as an optional configuration when buying a new car, but also install the device on an existing car, and even configure a mobile satellite navigation system to put in that car when driving it, or take it to have a picnic or climb a mountain.

The satellite navigation system for guiding drivers has the following four important factors: satellite signal, signal reception, signal processing and map database.

Folding satellite signal

Car satellite navigation system needs to rely on global positioning system (GPS) to determine the position of the car. Basically, GPS needs to know the latitude and longitude of the car. In some special cases, GPS needs to know the altitude to locate accurately. With these three sets of data, the accuracy of GPS positioning can often reach 2~3 meters.

Because GPS requires the vehicle navigation system to work in the direct line of sight of synchronous satellites, tunnels, bridges or high-rise buildings will block this direct line of sight and make the navigation system unable to work. Moreover, the navigation system uses triangles and geometric laws to calculate the position of the car, so the car can only be determined if it is at least under the sight of three synchronous satellites at the same time. The more synchronous satellites in the direct line of sight of the navigation system, the more accurate the positioning. Of course, most synchronous satellites are above densely populated cities, so when you are far away from cities, the navigation system will not work well or even at all.

Folding signal reception

The working principle of GPS system is to analyze the signals received from synchronous satellites. Projected on a vertical plane, these signals can be visually represented as inverted funnels. When the lower half of these funnels overlap, the GPS analysis program can calculate the coordinates of the car's location. A device similar to a gyroscope is used for the navigation of an airplane or a ship, and can continuously provide the position of a car when the car is running. However, when the satellite signal is interrupted, the data provided by the speedometer is used to fill in the blank and record the driving time.

Folding signal processing

The signal received by GPS and the information provided by speedometer will be provided to the vehicle navigation system through the receiver, which will be analyzed and processed by the software system and superimposed on the stored map.

Folding map data

When the coordinate information provided by GPS is superimposed on the electronic map, the driver can see his current position and future direction. This last link is called surveying and mapping, and it is also the most important link in the car navigation system. Without a map, the navigation system has no direction.

There are many channels for map database, the most important of which is the block database provided by city government agencies. For a good car navigation system, the quantity and accuracy of maps and the timeliness of data are very important. No matter how accurate the coordinate position provided by GPS is, if your navigation system can't provide a map of your area, or the provided map is wrong, your system can be said to be worthless. Therefore, when purchasing a vehicle-mounted satellite navigation system, we should pay attention to the following matters:

First, check the accuracy of the test system. Choose one or two familiar roads or newly opened hotels to see if the system can accurately display the location of the car. Because streets and road sections are always changing, your system must also provide regular update services.

Second, consider the storage capacity of the system. In America, if you want to keep all the maps of the whole country, you need at least three CDs. Therefore, the car navigation system must also have a correspondingly large hard disk memory.

Third, image display. The image display of the car navigation system can be installed on the dashboard of the car, and can also be projected on the screen of a notebook computer or even a PDA. In order to adapt to different weather and lighting conditions, the image display screen must have sufficient brightness, sufficient size and good resolution.

Fold and edit the system classification of this paragraph.

GPS vehicle application systems are generally divided into two categories: vehicle tracking system and vehicle navigation system. They are completely different in function, one is vehicle anti-theft and the other is vehicle autonomous navigation. Because the signal of "only receiving but not sending" is a major feature of GPS receiving system, the GPS tracking system used for anti-theft is to provide a solution for collecting the use fee for GPS car anti-theft instrument with the help of communication network and government supporting system. On the other hand, the car navigator can grasp its position and destination in time by receiving satellite signals and cooperating with electronic map data. The autonomous navigation mode does not charge any usage fees, and users can selectively purchase map data according to their own needs.

GPS technology uses GPS satellite signal reception, which can continuously receive the data parameters sent by the satellite for 24 hours and calculate the received three-dimensional position, three-dimensional direction, movement speed and time information. By receiving satellite signals and cooperating with electronic map data, the car navigator can grasp its position and destination in time. The autonomous navigation mode does not charge any usage fees, and users can selectively purchase map data according to their own needs. When the user installs the car GPS in the car, no matter which city, town or suburb the user is in, we can find the restaurant or the nearest gas station in an instant.

Fold and edit this part of GPS.

Global Positioning System (GPS) is a new generation of space satellite navigation and positioning system jointly developed by the United States Army, Navy and Air Force in 1970s. Its main purpose is to provide real-time, all-weather and global navigation services for land, sea and air, and it is also used for some military purposes such as intelligence gathering, nuclear explosion monitoring and emergency communication. It is an important part of America's global dominant strategy. After more than 20 years of research and experiments, it cost 30 billion dollars. By March 1994, 24 GPS satellite constellations with global coverage of 98% had been deployed.

The global positioning system consists of three parts: (1) the ground control part, which consists of the main control station (responsible for managing and coordinating the work of the whole ground control system), the ground antenna (injecting the search message into the satellite under the control of the main control station), the monitoring station (automatic data acquisition center) and the communication auxiliary system (data transmission); (2) Space part, which consists of 24 satellites and distributed on 6 trajectory planes; (3) User equipment is mainly composed of GPS receiver and satellite antenna.

The main features of GPS are: (1) all-weather; (2) Global coverage; (3) The three-dimensional constant speed timing accuracy is high; (4) Fast, time-saving and efficient; (5) It has a wide range of uses and diverse functions.

Main uses of GPS: (1) land applications, mainly including vehicle navigation, emergency response, atmospheric physical observation, geophysical resource exploration, engineering survey, deformation monitoring, crustal movement monitoring, municipal planning control, etc. (2) Marine applications, including the determination of the best navigation route of ocean-going ships, real-time ship dispatching and navigation, maritime rescue, marine treasure exploration, hydrogeological investigation, offshore platform positioning, sea level fluctuation monitoring, etc. (3) Aerospace applications, including aircraft navigation, attitude control of aerial remote sensing, orbit determination of LEO satellites, missile guidance, aviation rescue and manned spacecraft protection detection.

There are many kinds of GPS satellite receivers, which are divided into geodesic type, all-station type, time service type, hand-held type and integrated type according to models. According to the purpose, it is divided into vehicle, ship, airborne, satellite and missile.

After more than 20 years of practice, it has been proved that GPS system is a high-precision, all-weather and global multifunctional radio navigation, positioning and timing system. GPS technology has developed into a multi-field, multi-mode, multi-purpose and multi-mode international high-tech industry.

Folding map query

◎ You can search your destination location on the operating terminal.

◎ You can record the location information of the places you often go to and save it, or you can share it with others.

◎ Vaguely inquire about the information near one's attachment or a certain location, such as gas station, hotel, ATM, etc.

Folding route planning

◎ The ◎GPS navigation system will automatically plan the route according to the starting point and destination you set.

◎ You can set whether the planned route passes through some route points.

◎ Planning lines can be set to avoid high speed and other functions.

Folding voice navigation

Provide drivers with driving information such as turning at intersections and the status of navigation system in advance by voice, just like a guide who knows the way tells you how to drive to your destination. One of the most important functions in navigation is to let you reach your destination safely through voice prompts without looking at the operation terminal.

Folding picture navigation

A map will be displayed on the operation terminal, as well as the driving information of the current position, driving speed, destination distance, planned route prompt and intersection turning prompt of the car.

Folding planning line

When you don't follow the planned route or take the wrong intersection, the GPS navigation system will re-plan a new route to your destination according to your current position.

Disadvantages of folding and editing this paragraph

Car navigation often misleads car owners.

There are not a few car owners who are misled by car GPS. For example, some remote areas cannot be found on the navigation map, or "Zhang Guan Dai Li" misleads the owner; Sometimes you can get to the road after crossing a street, but the navigation map is "far away and near", taking the owner for a big spin. At present, car navigation relies on GPS technology, but GPS can't locate 100%. Different from mobile phone broadcasting, GPS can receive signals anywhere, and many things will affect GPS reception, including the distribution of stars in the sky, buildings, viaducts, radio waves, leaves, hot paper and so on. GPS positioning is greatly influenced by external factors. Generally speaking, looking up from the GPS position, you can see the area of the sky, that is, the area where GPS can receive signals.

Fold and edit the purchase details of this paragraph.

In the current automotive electronic products, the proportion of car DVD navigation is increasing, and nearly 40% of new car owners have the need to install car DVD navigation. So a large number of DVD navigation products are produced and branded, and the quality difference of products is beyond your imagination.

Many DVD products will scream as soon as they are loaded into the car and step on the accelerator horn, with poor sound and image. Therefore, 39 Auto Parts Network reminds consumers to pay attention to the following three details when purchasing car DVD navigation products:

Sound fidelity

DVD is used to play music, so the sound quality is very important. So before choosing a DVD, be sure to ask what the output of this DVD player is "V", or compare the sound quality of this machine with other DVD players. If the sound quality of DVD player can be comparable to that of CD player, the price will certainly not be much cheaper.

Image and DVD player distribution

There are two kinds of DVD screens: analog screen and digital HD screen. The pixels of the analog screen are generally 240*240 or 480*240 pixels, and the high-definition screen is generally 800*480 pixels or higher. In addition, good DVDs are equipped with dual drives, that is, DVD and CD drives.

Accuracy and convenience of navigation

Good DVD manufacturers will use better navigation boards and genuine map cards, while bad DVD navigation is easy to crash during navigation, and navigation satellites are slow and navigation accuracy is poor. At present, the internal circuit structure of the navigator can be reasonably optimized, and the navigation products provided by manufacturers with high hardware configuration have fast navigation speed, high precision and convenient use.

Collapse and edit this map upgrade.

The map upgrade of car navigation is based on the public data released by the official surveying and mapping company provided by the navigator. The frequency and upgrade time of each surveying and mapping company are uncertain. In China, the map versions with high usage rate include Khalid, Daodaotong, Chengjitong and Gaode. Relevant information will be released in official website, a major map company.

How to use this paragraph for folding editing?

About finding stars

All GPS can't receive satellites indoors or the signal is very weak, only? It is common sense that car navigation can only receive signals outdoors. The correct way to search for signals is:

1. Fixed search signal, don't walk, because walking GPS is not easy to locate.

2. Open the machine to the navigation interface, click the signal sign in the upper right corner of the navigation interface, and you can see the satellite number map, which is normal for 3 positioning and 5 navigation.

3. It is best to turn on the GPS receiving satellite signal module at the upper right of the back of the machine and receive the signal at a 90-degree angle with the machine.

4. Speed of receiving signal: There are two concepts involved here.

(1) cold start means that the first GPS satellite search is called cold start, which is usually slow.

Different GPS search speeds are different. Some GPS cold start search satellites within 1 minute, some 1 minute, about 1 minute to 2 minutes, and some 2 minutes.

(2) Significance of hot start: Restarting after 2 hours is hot start, which is the fastest.

It usually takes 1-2 seconds to find the satellite. 2 -4 hours is a warm start.

About electronic dogs

At present, all electronic dog functions in GPS are carried in the navigation map, which means that the electronic dog map is carried in the machine. Anti-speed radar is a commodity prohibited by the state and Taobao. The functions of electronic dog in GPS are as follows:

1. That is, there is a speed information point at the intersection in the GPS map, and GPS will sound a reminder.

2. If there is no information point of speed measurement in the map, it will not be reminded. So we can't just rely on GPS to reverse the speed measurement. There is a good way to help you solve it: you can set your own speed in GPS, and if you exceed the speed limit, GPS will remind you to drive at a limited speed by voice.

About GPS maintenance

Do it correctly, otherwise it will affect the service life of GPS. The correct operation method is:

1, when using it, close the page first and then the machine. You can't shut down the machine directly without closing the page. That is illegal operation.

2. Before the machine is used, it should be washed for about 10 hour for three times, so that the power storage capacity of the battery can be greatly exerted.

3. Start the car first, and then plug in the cigarette lighter. Unplug the cigarette lighter after navigation and plug it in after the next car starts, which helps to protect the battery of the machine.

Maintenance method of folding editing area

First, the correct operation

The above is from the aspect of maintenance. In addition, it is also important to use it correctly. After use, turn off the car navigation first, and then turn off the engine. Never turn it off to save trouble, but it is easy to damage electronic components after a long time.

In addition, don't let the navigation screen touch sharp objects. At the same time, try to avoid the exposure of the center console in the sun. The large temperature difference not only affects the endurance of navigation, but also affects the touch sensitivity of LCD screen.

Second, the daily maintenance

In daily use, if you do not pay attention to the operation, it is easy to bring dust to navigation. In fact, the problem of dust prevention is considered in the design process now. Compared with before, it has been relatively reduced, and more people will choose to play music directly with USB interface. As long as we pay attention to cover the protective cover in time when using it at ordinary times, it can effectively prevent dust from entering. The laser head of a CD is a wearing part and expensive. If it is broken, please ask a professional to deal with it. Buttons and knobs on the panel can be cleaned with small cotton swabs.

Third, waterproof and moisture-proof.

Electronic equipment is afraid of water, so it is necessary to be waterproof and moistureproof. When washing the car, be sure to close the door tightly. Be careful when cleaning the interior of a car. If you need to wipe, try not to let too much water on the towel, and don't spray it with liquid such as watering can or detergent. After cleaning, it is best to wipe it again with a soft and dry towel to prevent the navigation from being affected by moisture. You can also open the doors and windows to ventilate, evaporate the water in the car and then close it. This not only helps car navigation, but also helps the car to dry and prevent bacteria from growing.

Besides paying attention to correct operation and maintenance in daily use, it is also important to choose a reliable car navigation brand. Well-known car navigation manufacturers can not only provide high-quality car navigation, but also provide all kinds of perfect after-sales services for car owners, making navigation really practical. Car navigation is a sophisticated instrument, and the data inside should be updated and upgraded in time to facilitate the use of car owners.