The GPS positioning module is equipped with a wifi chip and peripheral circuits, which can communicate with the Global Navigation Satellite System to locate and navigate without consuming traffic. All machines equipped with GPS modules can communicate with GPS synchronous satellites in any time period and in any region. At present, there are so many GPS positioning modules on the market, how should we choose?
(Beitian GPS module BD-126ZF)
How to choose GPS Beidou system positioning module
1. What communication satellite navigation system is applicable
Satellite data navigation system (GNSS) refers specifically to each communication satellite navigation system software, including the global and regional sum, such as the US Global Positioning System (GPS), the European Union's Galileo Satellite Navigation System (GALILEO), and China's Beidou communication satellite Navigation system (BDS), Russian GLONASS communication satellite navigation system (GLONASS), and related enhancement systems. For overseas consumers, it generally depends on whether the GPS module allows GPS/GLONASS/GALILEO.
2. Better receiving sensitivity
Receiving sensitivity means that the receiver can clearly take out the minimum signal receiving power of the signal. The better receiving sensitivity of the GPS positioning module enables the wireless communication equipment to have a stronger ability to capture weak signals. In this way, with the increase of the transmission interval and the weakening of the received signal, the highly sensitive wireless communication equipment can still obtain data, maintain a stable connection, and greatly increase the transmission interval.
3. Faster positioning time
The positioning time refers to how long the GPS mechanical equipment will automatically and gradually establish its actual position, generally based on seconds. When this time is reached, the GPS device will receive a signal to the GPS positioning satellite to gradually determine its actual position. And it includes the first operation, cold start, hot (warm) start positioning time. Whether it is vehicle navigation or navigation maps in mobile phones, they are all based on GPS positioning modules. Fundamentally, the less time-consuming positioning is, the easier it is for data processing to be recognized by technical engineers.
4. Position accuracy
Position accuracy refers to the level of agreement between the plane coordinates obtained by the indoor spatial positioning point and its specific plane coordinates. If the positioning accuracy does not have the effect of ensuring versatility, no matter how luxurious the GPS design is, it will still make people dislike it. However, different navigation environments must first consider the application scenario, and then consider the external factors.
Positioning accuracy can be investigated from static and dynamic situations, and the expected effect of dynamic positioning is better than that of static data positioning. The standard positioning performance parameters of the GPS positioning module are tested under the conditions of sufficient open sky and high-quality communication satellite signals. Therefore, it is difficult to achieve standard positioning time and positioning precision in routine testing.
5. Function loss
Power consumption refers to the output power consumption, which refers to the actual power and power error of mechanical equipment and components. With the rapid growth of electronic information technology and microelectronics technology, the application field of embedded operating system is becoming more and more common. Environmental protection is a global trend. For example, many chips in computers used to be powered by 5V, but now they use 3.3V and 1.8V, and put forward the definition of green system. Many manufacturers attach great importance to the low energy consumption of GPS positioning modules. Low power consumption design of circuits and systems is always a key factor considered by electronic engineering professionals.
6. Frequency stability
The signal-to-noise ratio (SNR) is the signal strength of the satellite, which should be the detection of the signal information of the signal noise. Under the same interface test, the greater the frequency of the detected communication satellites, the better the characteristics of the GPS positioning module.
(Beitian GPS module BN-357ZF)