The vehicle positioning terminal is applied to a plurality of vehicle fields, and can perform real-time positioning on the vehicle, inquire about the driving track, remote video, and power cut control, and can also record whether the driver has an illegal behavior such as an offset route or an overload overspeed.

However, in practical applications, the vehicle positioning terminal also has its shortcomings, such as drift errors, which is one of the most common problems. Although the error of drift is not particularly large, it also poses many problems for the management of the customer. . Therefore, Boschjie Technology combines years of professional experience and the skills accumulated in overcoming this problem to briefly talk about the factors that influence the drift of positioning.

First, the antenna

The antenna itself is of good quality and good quality. The device is an important element. This is the source of satellite positioning data. Many of the reasons for unstable or invalid positioning are originally caused by the unreasonable orientation of the antenna device. .

The antenna head is generally flat and should be placed flat so that the satellite signal area is added upwards. Cannot be placed vertically on the A-pillar of the vehicle.

When the antenna is relatively long, it cannot be looped at will, which will constitute a similar inductance effect and affect the antenna sensitivity. It should be pinched and tied tightly to form a linear shape that folds back and forth.

Antennas cannot be too close to electronic devices because electronic devices generally have a certain amount of radiated interference and should be kept as far away as possible. The camera is also one of the electronic devices, sometimes negligent, and it is not appropriate to place the antenna directly under the camera.

Second, the positioning module

The stability of the module is very important, and it should work stably under various environments such as high and low temperature, humidity, etc. Selection is very important. Routine environmental tests, electrical performance tests, and software communication tests can ensure the normal use of the module, but can not ensure the stability of the long-term work of the module in each environment of each region. It is necessary to conduct inductive analysis of the positioning data for a long time to determine the module. The merits and demerits are based on the module selection decision. After inductive analysis, it is also possible to discriminate and classify the satellite positioning signal quality under different regions and time periods, so as to scientifically distinguish and manage the business when operating, and remove the objective elements that are difficult to solve.


Third, network transmission

After the data received by the vehicle positioning device is discriminated and selected by various algorithms and module quality and antenna quality, it will constitute effective positioning data, which also needs to be transmitted to the channel through the network. Because of the incomplete stability of the network transmission, the positioning data cannot be effectively transmitted to the channel. If some positioning data is lost, the positioned vehicle will "fly" in the map. Therefore, it is required to design a better cache and data replenishment mechanism. When the network is interrupted, the positioning data is cached on the device side, and even if the device end restarts and shuts down, the data to be supplemented is not randomly discarded.

Fourth, channel processing

The locator positioning data is transmitted to the channel and analyzed and stored and displayed. It is generally believed that the data obtained is valid data, but because the historical data stored on the device side is limited, how to make good use of the massive channel data is also a research topic. If it is only stored, it is very simple, but if the line is further identified and confirmed by the history record, and constitutes the line library, then through intelligent and active query, the positioning data points of the device end can be more accurately corrected and corrected, so that A line, when displayed on the map, is the best function, giving customers the best experience.

to sum up

In summary, the selection of vehicle positioning equipment is not on the surface to look at the appearance of the equipment, talk about the price is so simple, test verification is the last word. Some car GPS terminals on the market have some similar appearances, but in fact they only look similar, and the design principles of the accessories are completely different. In this case, the real-time vehicle positioning terminal manufacturer reminds everyone to be cautious when selecting products, and to select large brands, manufacturers with post-maintenance guarantees are the best.