Car navigation, also known as "car navigation" or "car navigation". It is a navigation device on a car. General car navigation is carried out using in car GPS (Global Positioning System) combined with electronic maps, which can conveniently and accurately tell the driver the shortest or fastest path to the destination, making it a good helper for the driver. Car navigation is no longer just about navigation, but also includes audio and video playback, 3G internet access, radio, games, e-book reading, digital TV, and more. In addition, the newly launched car computer is also a type of car navigation. Car computer is a highly integrated multimedia entertainment information center for vehicles. Only top-level models such as BMW and Audi abroad are equipped with similar intelligent car systems. Its main functions include comprehensive multimedia entertainment in vehicles, the clearest and most detailed car navigation, professional diagnosis of car information and faults, and mobile office and industry applications. 1、 Classification by vehicle type navigation: 1. Special vehicle type DVD navigation: one machine is equipped with one model (most require the removal of the original car CD) 2. Universal type: can be modified to various vehicle models by adding frames 3. Split machine: Special vehicle specific navigation sub product, without removing the original car CD and other components, upgrading DVD navigation products 2. Navigation classification by use function: 1. Traditional handwritten navigation 2. Voice controlled navigation: 1), Real person secretary service voice controlled navigation; a. Advantages of Bluetooth Push to Talk Voice Navigation: Directly connect your phone's Bluetooth to the car navigation host. After Bluetooth is first connected, it will automatically connect in the future. Stable signal and reliable quality; b. Additional communication box voice controlled navigation; Disadvantages: With an additional communication box, its signal receiving module is incomparable to a few thousand yuan mobile phone signal receiving module. When the signal is poor in areas, the mobile phone may have a signal, but the car navigation may not necessarily have a signal, causing more customer complaints. Compared to Bluetooth Push to Talk, it also requires the addition of a communication box and phone card, which is very troublesome; 2) Human machine dialogue voice controlled navigation; Disadvantages: The recognition rate of speech recognition software is not high
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China