Vehicle positioning and tracking equipment quality appraisal

The

vehicle positioning and tracking device is based on the core principle of multi-mode satellite positioning and cellular communication collaboration. By optimizing GNSS chip sensitivity, communication module stability and low power consumption design, it achieves synergy of real-time positioning accuracy, trajectory playback integrity and abnormal alarm response speed. It is widely used in fields such as logistics and transportation, shared travel, vehicle anti-theft and fleet management. In the logistics industry, it is used for full-process visual monitoring of cargo transportation; in the car-sharing field, it meets users' needs for accurate car search and electronic fence alarms; in the insurance industry, it ensures driving behavior data analysis for UBI car insurance. Compared with traditional positioning equipment, new equipment has the characteristics of multi-band satellite support, wide environmental adaptability and high level of data encryption. It is the core sensing node of the Internet of Vehicles ecosystem.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide quality appraisal services for vehicle positioning and tracking equipment. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for the quality appraisal of vehicle positioning and tracking equipment.

With the large-scale application of the Internet of Vehicles, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance indicator dispute: excessive positioning accuracy, communication packet loss rate;

2, material defects: insufficient GNSS antenna gain, lithium Battery cycle life;

3, process issues: PCB high-frequency signal crosstalk, waterproof seal failure;

4, contract performance dispute: core module does not match the technical agreement.

0 Such cases need to pass positioning accuracy verification, communication stability testing and hardware reverse analysis to clarify the quality responsibility.

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1. Appearance inspection

conducts a comprehensive inspection of the appearance of the device, including device model, nameplate logo, appearance damage, interface integrity, etc.

2. Functional test

conducts functional tests on the device in actual use environments, including positioning accuracy, receiving sensitivity, data transmission stability, etc.

3. Data analysis

0 collects data generated during the operation of the equipment and analyzes it to see if there are problems such as missing data, anomalies, and accuracy deviations.

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24. Disassembly and inspection

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4If necessary, disassemble and inspect the equipment to check its internal structure, component quality, assembly process, etc.

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A logistics company of the applicant signed a "Vehicle Positioning Terminal Procurement Contract" with an equipment manufacturer of the defendant, agreeing that the positioning accuracy is ≤5m CEP. Vehicle trajectories frequently drifted during operation, and the manufacturer argued that it was caused by urban signal obstruction.

Identification and analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of "vehicle positioning and tracking equipment", contract technical agreements, on-site investigation case materials and other data, and made the following quality analysis opinions:

The vehicle positioning and tracking equipment involved in the case had a static positioning error of 12m in the open field (protocol ≤5m), and the GNSS antenna gain was only 1.8dBi (protocol ≥3dBi); the communication module’s packet loss rate exceeded 8% in a weak field of -110dBm (protocol ≤2%); improper PCB layout caused the LNA circuit noise coefficient to be >2dB.

The appraisal conclusion concluded that defects in hardware design and antenna performance were the main causes of positioning failure.

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Vehicle positioning and tracking equipment quality appraisal report should include:

1, appraisal purpose and reference standards;

2, involved specifications, production batch number, construction record;

3, testing List of methods and equipment;

4, analysis of correlation between test data and failure;

05, clear conclusion and technical basis for quality responsibility determination;

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26, signature of appraiser, professional qualification certificate and official seal of the organization.

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