Henan coal pull vehicle GPS Which is better? Double GPS positioning system can detect every unloading switch working state enterprise fleet management GPS, when the vehicle reaches the destination stop, you can put a time unloading time, place and other recorded; when in a non-legal area Double GPS positioning when unloading the switching operation is detected, Double GPS positioning and monitoring platform can monitor the effects of this non-normal operation, and can see the specific circumstances of the car according to the car's camera, thereby improving the transport of coal mine supervision. Henan coal truck GPS positioning system, GPS monitoring system pulling coal cars, power plants and coal car GPS management system 1) fixed line alarm to prevent a change of coal per day job is running coal truck route is relatively fixed, which compare easy operation as per coal truck route planning. We complete the transport task coal truck fixed route should take real Shangqiu enterprise management GPS vehicle prices by Double GPS positioning track playback, preserved on a map, set to a fixed line. 2) Illegal unloading area open switch alarm Depot GPS positioning system can detect every unloading switch working state, when the vehicle reaches the destination stop, you can put a time unloading time, place and other recorded; when Double non-legal area GPS positioning switch detects unloading operation, Double GPS positioning platform can monitor the effects of this non-normal operations Shangqiu enterprise management GPS vehicle installation, and you can see the specific circumstances of the car according to the car's camera, thereby increasing the level of supervision of coal mine transportation. 3) Double speed alarm use GPS positioning speed alarm function, we can set the upper speed limit for each vehicle, according to the regional road they walk past the speed limit, respectively, during operation when the vehicle speed exceeds the upper limit GPS vehicle management business after Shangqiu how much the system will be sound and light alarm. 4) historical track playback function for some vehicles in question, it can be related to the historical track playback function can solve the problem of historical trajectory of the head. GPS positioning is what causes the slow GPS positioning is generally slow because of a hardware problem, determine GPS positioning time is that it's time to start positioning time is the time to restart GPS receiver receives location determines the time required for now. For 20-channel receiver, if you locate near the last location of the cold start positioning time is usually 3 to 5 minutes, the hot start of 15 to 30 seconds. Cold start initial use; battery depletion resulting in loss of information ephemeris. GPS can not locate what is the reason the general case of GPS signal vulnerable buildings and metal barrier, so the use of GPS to be outdoors. If you can not locate in the car, if you have an external antenna, the GPS antenna is best placed in the roof, in addition, will also affect the auto film positioning of GPS devices. GPS positioning is not exactly what the reasons 1, GPS positioning system, regardless of vehicle positioning system, or personnel positioning system. Both civilian and military sub-two kinds. Because the GPS satellite positioning system used in the United States military and civilian difference in the signal, GPS positioning system we contacted all of this is to locate the root causes of the civil errors. 2, the map is accurate and detailed GPS positioning system is accurate also factors. 3, misunderstanding, positioning and positioning GPS positioning system on the electronic map in reality there is a gap in the electronic map is a coordinate point as a reference position, but in reality the coordinate points may be a building or other object. 4, GPS positioning system itself quality problems, incorrect installation may cause misalignment.