SIRO: indoor positioning technology (1)

Microsoft, Google, apple, Nokia, Broadcom, indooratals, qubulus, and so on outside China, research on indoor positioning technology solutions, but their respective technical positioning is different.

In China, the research is also in full swing. Zhou chenghu, the leader of the 863 expert group in the navigation field and academician of the Chinese Emy of Sciences, said that China already has the world's leading indoor positioning technology capabilities, formed indoor and outdoor sub-meter level centimeter level, indoor and outdoor due to the seamless positioning and navigation capability of 3 meters.

As our friends in the surveying and mapping industry know, the outdoor positioning technology is very mature. Although indoor positioning is in full swing, we still need to analyze the possibility from theory in many aspects, which remains to be verified.

Image Source: Tiger sniffing

Here, the main focus is on the indoor positioning technology. Youboyou analyzed the patented technologies of several large companies in indoor positioning as follows:

However, it is reported that zulutime is a company that develops geographic location services for wireless networks. Its co-founder, Geoff Rhoads, is a productive inventor, it owns more than 300 patents, including digital watermarking technology and a 30-meter-tall outer space telescope.

At the end of 2006, Rhodes joined the founding of zulutime. Since then, the company has been focusing on the geographic location technology of indoor wireless networks, and has also involved a lot of indoor wireless networks to perceive the location of mobile phones.

We sincerely hope that Chinese enterprises can catch up.

Next, let's take a look at these positioning technologies and focus on the WiFi positioning technology.

This method is based on the signal strength embedding method, that is, the Wi-Fi signal strength.

The general implementation scheme is as follows:

There are many patents in this field in China, but no good products have been found yet. It is estimated that there are still some shortcomings in AP and fingerprint library collection, which makes positioning accuracy unable to be effectively improved.

Precision Positioning Technology Based on WiFi should be able to reach the meter level at present. Although the Sub-meter level and sub-meter level positioning scheme is inferior to Bluetooth, ultra-broadband, and laser light technology, it is not applicable to non-professional markets, we still have to work hard to develop in this area. For example, wifuslam and meridian are some companies based on WiFi indoor positioning. It is estimated that Baidu, autonavi, and thinking in China will not be lonely.