This section provides an overview for gps sensors as well as their applications and principles. Also, please take a look at the list of 4 gps sensor manufacturers and their company rankings.
Table of Contents
A GPS sensor is a sensor used in the Global Positioning System (GPS), a worldwide positioning system.
GPS is an advanced satellite-based system that can be used 24 hours a day, 7 days a week, by anyone, anywhere, to measure location with high accuracy. Such as car navigation, to accurate time calculations and geophysical observations.
GPS sensors have been used for positioning in aircraft, ships, and surveying. Today, with the development of information technology, they are actively used in smartphones, laptops, car navigation systems, digital cameras, smart watches, and drones.
In addition to these general positioning applications, precision positioning at the mm to cm level has also been realized and is used for precision surveying and precise measurement of crustal deformation. GPS satellites are also used to mediate time data measured by international atomic clocks around the world in determining international standard time.
GPS uses multiple satellites to determine its position on the ground by measuring the distance to each satellite.
The L1 and L2 signals sent from the GPS satellites are detected by the user's GPS receiver, which calculates the difference between the time of signal transmission at the GPS satellite and the time of reception on the ground.
The speed of the radio waves is the same as the speed of light, and the product of the propagation time and the distance between the GPS satellite and the GPS sensors on the ground can be measured.
GPS satellites transmit two types of signals, called L1 and L2 waves, at certain times of the day.
The control part (ground control) monitors the time and orbit of the GPS satellites and properly controls signal transmission and reception. Except for the main control station, the ground control is basically unmanned.
The location of GPS sensors can be calculated by knowing the distance from three GPS satellites. However, the GPS satellite clocks use atomic clocks and are very accurate, while the receiver clocks are less accurate. For this reason, four GPS satellites are usually used to increase the number of azimuths to be measured and improve accuracy.
Generally, the accuracy of location information from GPS sensors used in smartphones and car navigation systems is said to be several meters in error.
When using location information with smartphones, efforts are being made to improve accuracy by using a combination of distance from WIFI base stations, electronic compasses, and other devices.
Satellite-based positioning systems, including GPS, are called GNSS (Global Navigation Satellite System), which includes QZSS (Quasi-Zenith Satellite).
RTK (Real Time Kinematic) is a new positioning method that improves the accuracy of GPS-based positioning services: position information from GPS is received by two receivers, a reference base station and a mobile station, and the difference is used to compensate for position deviations.
The accuracy of RTK positioning information can be improved to an accuracy of a few centimeters, and there are high expectations for the use of RTK for smartphones and drones.
Combined with automatic driving technology using ICT (information and communication technology) and other technologies, this will open up the possibility of realizing various new services, such as new transportation services, smart agriculture, smart construction, and drone delivery services.
GPS transmitters are devices that calculate location information from GPS signals and transmit location information to specific destinations. In the real-time tracking type, location information is automatically sent periodically from the GPS transmitter or saved in the transmitter, so you can check not only your current location but also your route.
In the manual search type, the location can be searched only when the user wants to know where he or she is. Applications include monitoring the activities of the elderly and children, theft countermeasures for smartphones, cars, bicycles, etc., lost and forgotten items, and safety confirmation when climbing mountains.
*Including some distributors, etc.
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Ranking as of March 2023 GloballyDerivation Method
|1||Campbell Scientific Europe||50%|
|2||Japan Radio Co.||50%|
Derivation MethodThe ranking is calculated based on the click share within the gps sensor page as of March 2023. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.
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