The application market scale of UWB data transmission module for UWB ranging and positioning increases. Uwb positioning technology started from the pulse communication technology in the 1960s. In 2002, the United States approved it for civilian communications. In 2015, it started to really show off in the Microsoft Indoor Location Competition. In 2016, it accounted for half of the 3D category in Microsoft's indoor location competition and began commercial use. The UWB data transmission module technology has the advantages of high speed, anti-interference and low power consumption. The unique advantages of UWB make it an important technology in many fields.
What scenarios does UWB apply to?
1. Indoor positioning
As we all know, indoor positioning has always been a difficulty. There is no GPS signal indoors, and few other effective solutions can achieve indoor positioning. The UWB positioning system can establish a UWB positioning base station in a fixed area, wear a UWB positioning tag for the object to be located (personnel or materials), measure the distance from the tag to each base station, and determine the location of the tag to the base station according to the multilateral positioning method, so as to achieve indoor positioning. Time-of-flight ranging (TOF) and arrival time difference (TDOA) are widely used in ultra wideband ranging location data transmission module technology. From the point of view of positioning method, they belong to multi-point positioning, that is, to determine the relative position relationship between labels and multiple known coordinate points.
At present, the high-precision positioning function of ultra-wideband ranging positioning data transmission module technology has been widely used in the application environment of public security and justice, intelligent industry, intelligent construction site, intelligent elderly care and so on.
Step 2: Ranging
When you need to know the distance between two objects, you can also use two ultra-wideband ranging positioning data transmission modules ranging base stations are fixed on two objects, the two ranging base stations can achieve real-time ranging. This feature of UWB is applied to forklift ranging collision avoidance. There are two main devices in the system, one is the UWB ranging base station, the other is the UWB ranging tag. Ranging base stations can complete ranging requests initiated by tags and other base stations.
This UWB precision ranging technology is often used in forklift truck collisions with other shelves, items and personnel due to speeding, reversing, corners and turns. To solve these problems, we can use forklift ranging anti-collision system, wireless sensing and precision ranging warning technology to achieve warning and speed limit.
3. Data transmission
With the release of the Apple 11, UWB technology has become its key innovative feature and has caught the attention of the market. Using UWB technology, the iPhone can act as a control center and better connect to Apple's other devices. That said, "with the U1 chip and iOS13, when you use aerial delivery, as long as your iPhone is pointed at someone else's iPhone, the system will give priority to that person and let you share files faster."
This is a new data transmission function of Apple 11. Relying on powerful UWB technology, it can realize fast, low delay, stable and two-way data transmission function. Importantly, the data transmission function does not affect the positioning and ranging function of UWB, that is, it can realize the positioning and ranging of data transmission, very convenient for users to use.
Compared with the consumption level (ToC) category application, enterprise level (ToB) compared with other positioning technologies, ultra wideband ranging positioning data transmission module positioning technology has high precision, high security, low delay, high transmission rate, high stability index, has been applied to the enterprise market, The application scenarios include judicial prisons, hospitals, mines, chemical plants, factories, warehouses and other applications that require high material management or personnel management.
According to relevant statistics, the scale of China's UWB enterprise-level application market is 1.09 billion yuan in 2018, and it is estimated that the scale of China's UWB enterprise-level application market is 35.26 billion yuan in 2025, with a CAGR of 83% in the next 4 years. With the catalyst of Apple's application of UWB technology, FiRa alliance formed by Samsung, SONY, Bosch, NXP and other giants has a larger market scale.
With its own accumulation in the field of UWB technology, Feiluneng is willing to jointly promote the further maturity of UWB standard with industry colleagues, accelerate the formation of UWB ranging and positioning data transmission module ecosystem, and make contributions to the formulation of international standards!
It is a common positioning method of UWB ranging positioning data transmission module in indoor positioning technology
1. Signal arrival time
When the signal sent by the measured point (label) reaches the receiver (base station) of the reference node above 3, the distance between the transmitting point and the receiving point can be obtained by measuring the time to reach different receivers. Then, the receiver is taken as the center and the measured distance is taken as the radius. The intersection point of 3 circles is the position of the measured point. However, TOA requires the reference node to keep strict time synchronization with the measured point, and most applications cannot meet this requirement.
In the process of implementing this method, the distance information between the location tag and each base station needs to be measured, so the location tag needs to communicate with each base station back and forth, so the power consumption of the location tag is high. The advantage of this positioning method is that it can maintain high positioning accuracy inside and outside the positioning area (inside and outside the area surrounded by the base station).
2. Signal arrival time difference
Similar to TOA, only time differences are measured, not absolute time. This method only needs synchronization between reference nodes, and does not need strict time synchronization between reference nodes and measuring points, so the system is relatively simplified, so it is widely used in positioning system.
Ultra wideband ranging positioning data transmission module TDOA positioning is hyperbolic positioning, which requires the use of four positioning base stations in two-dimensional positioning. The hyperbola can be plotted by measuring the distance difference between the label and every two base stations, and the label coordinates can be determined by the intersection of the curves. In the process of implementing this method, the label only needs to broadcast the UWB signal once, which is beneficial to the power consumption and concurrency of the label.
3. Signal arrival Angle
The ultra wideband ranging positioning data transmission module AOA refers to the Angle between the signal transmission direction and the horizontal plane of the positioning node when the wireless signal transmitted by the anchor node reaches the positioning node by measuring the Angle between the wireless signal transmitted by the anchor node and the horizontal plane of the positioning node. The Angle sensor or receiving array is needed to calculate the specific position of the node, and the Angle value of other signals transmitted by the anchor node near the communication radius must be accurately measured. To ensure that the positioning accuracy meets the system requirements. Due to high hardware requirements and easy to be affected by external environment, the algorithm is limited in practical application.
4, the strength of the received signal
In other words, by measuring the signal receiving intensity of the wireless signal sent by the anchor node at the location node as the location feature quantity, and by using the collected signal receiving intensity as the location feature quantity RSS value, there are two main positioning algorithms for the location of the target node. The coordinate information of the positioning node is based on the path loss model to achieve positioning (also known as trilateral measurement), and the positioning node is obtained according to the fingerprint recognition algorithm (also known as pattern matching).
