Take you to understand the GPS module used in GPS locator
Since the emergence of GPS positioning technology, it has continued to develop and mature, and the range of applications has expanded. In all applications related to it, a special component — GPS module is indispensable.
What is GPS Module
GPS module is the GPS signal receiver, it is a wireless Bluetooth or wired way to connect with a computer or cell phone, it will receive the GPS signal to the computer or cell phone in the GPS software for processing. We often say that the GPS positioning module is called the user part, it is like & ldquo; radio & rdquo; like receiving, demodulation satellite broadcast C / A code signal, in order to frequency 1575.42MHz. GPS module does not broadcast signals, belongs to the passive positioning.
The application of the GPS module is the key to the development of the serial communications protocol, that is, the module's relevant input and output protocol format. It mainly includes data types and information formats, where the data types are mainly binary information and NMEA National Marine Electronics Association data information. These two types of information can be communicated with the GPS receiver through the serial port.
The GPS module uses the distance rendezvous method to derive the four parameters of the receiver's derived longitude, latitude, altitude, and time corrections by calculating the pseudo-distance to each satellite, which is characterized by a fast point location, but with a large error. The module of initial positioning needs at least 4 satellites to participate in the calculation, called 3D positioning, 3 satellites can realize 2D positioning, but the accuracy is not good.GPS module through the serial communication port constantly outputs NMEA format positioning information and auxiliary information for the receiver to choose the application.
With the development of society and the emergence and growing demand for personal positioning services, personal locators are beginning to enter people's daily lives. This personal locator with GPS module can monitor the position of the wearer in real time and send out this information. Thus, it can be used for personal localization, anti-lost children and elderly and anti-theft.
The GPS module in the personal locator is capable of determining the geographic location of the wearer by receiving signals from multiple positioning satellites in an activated state, and the orbital data and transmission time of these satellites. Since such positioning devices are usually small in size, there are certain requirements for the size of the GPS module. At the same time, such devices are usually battery-powered, so the power consumption of the positioning module should not be too large in order to maintain the operating time of the personal locator as much as possible.
The GPS module has ultra-high sensitivity and improves TTFF (time to first fix) and indoor positioning accuracy through cold-start technology, a total solution that can be used to design ultra-compact applications. The cost of using this solution is low compared to traditional PCB (Printed Circuit Board) technology, requiring only a small amount of external BOM, and also enabling a significant reduction in package size.
Junoda Technology: wireless communications and positioning professional supplier manufacturers, focusing on sales of GNSS module industry for eleven years, focusing on drones, vehicle security monitoring and scheduling and bus automatic reporting, DVR tachograph, car DVD navigation, GPS electronic dog, engineering measurement, synchronized timing, engineering machinery, industrial automation and many other areas. There are focused on doing a good job of each product, attentive service, is committed to providing customers with more cost-effective products, to provide a full range of module supply and OEM / ODM services! Dedicated to creating long-term value for customers!
