[introduction]As blue tooth low power comsumption (Bluetooth Low Energy, abbreviation BLE) the technology develops 5.2 reach taller version, among them one of the most significant progress are fixed position dogs technology, this technology can be used at the shift of asset and fixed position to dog indoors.

As blue tooth low power comsumption (Bluetooth Low Energy, abbreviation BLE) the technology develops 5.2 reach taller version, among them one of the most significant progress are fixed position dogs technology, this technology can be used at the shift of asset and fixed position to dog indoors.

Blue tooth is measured include not to have join mode knead dough to the method to join mode, because its provide this kind of some versatility, the application that this technology can be in all sorts of differring gets applying in setting. This kind of adaptability brought new likelihood for wireless communication and fixed position service, hopeful obtains the progress of hearten making a person in future.

Graph 1: The passenger flow inside the retailing shop is analysed, show popular travel to take a course

One of staple market of this technology are retail trade, large store hope knows a customer better the condition of going from place to place inside inn, dig sale latent capacity to the greastest extent thereby.

Besides retail trade, asset tracks a technology to promote a respect to also can produce far-reaching effect in industrial efficiency. It can be used at monitoring stock to carry car, reduce time waste, improve work efficiency. This technology still can be used at the digital twin with complex drive (Digital Twins) system, realize accurate in fictitious environment duplicate movement.

Asset is tracked can improve efficiency not only, still can be in ensure safe respect produces main effect. Mix in storehouse deserve to send a center, dog the application of label makes employee and industrial robot can safe coexistence, track the move of employee through letting a robot, eliminated the possibility that produces collision.

Basic system designs a principle

To build positional testing system, need is inside the building (the building that no matter be retailing shop, storehouse, hospital, airport,still is other type) lay aerial array. This array can undertake the position of high accuracy is measured.

Use method can be ” arrives at horny ” (AoA) or ” of ” horn setting out (AoD) . Although both uses same radio frequency (RF) signal is measured, but signal processing and antenna are configured however each are not identical.

Graph 2: Sketch map of positional testing system

Normally the circumstance falls, the system comprises by 3 bodies: Blue tooth emitter (AoA label) , receiver / aerial array (AoA positioner) and angle and positional computation system. When the job, aoA label can send fixed frequency to expand (Constant Tone Extension, CTE) signal.

Signal of this kind of CTE travels outwards with the globose mode that expands ceaselessly, be received by aerial. The wavelengh as a result of signal / frequency is foregone, the distance between receiver also is foregone, because this can use the angle of relatively simple trigonometric computation signal, the phasic difference when arriving at every antenna according to signal thereby determines the position of emitter.

Replace method and higher definition

Undertake twice exploration through using two pairs of antenna, with respect to the exact seat that can give AoA ticket with extremely high precision triangle fixed position.

Another kind need not the method that angle measures is 3 coordinate law (Trilateration) . This kind of method is based on use blue tooth the channel of 5.4 is explored (Channel Sounding, CS) characteristic or exceed a broadband (Ultra-Wideband, UWB) technology, measure flight time (Time-of-Flight, toF) will reach distance.

CS also is called high accuracy distance is measured (HADM) , a kind when the distance that a lot of people think it is to be based on RSSI measures very accurate replace a method.

Install solution of dark beauty RSL15 AoA

The RSL15 that Ansenmei rolls out is one passes blue tooth the safe and wireless small controller of 5.2 attestation, only to include industry, medical treatment is mixed arrive at horn to locate (AoA) inside exceeded application of low power comsumption to undertake optimizing. Is this parts of an apparatus based on a running frequency to be as high as the Arm of 48 MHz? Cortex? – M33 processor compose is built, have Jiamian complete function. It provided the power comsumption level with extremely low industry, the peak value electric current when blasting off is 4.3 MA only, it is to reduce more below the Morpheus mode that awaiting GPIO to wake up to 36 NA. RSL15 small controller aims to satisfy mix from retail trade, clinical environment, manufacturing industry deserve to send a center to wait to dog extensively applied demand.

AoA solution of Ansenmei is in emitter (AoA label) with the scanner / RSL15 was used in positioner. This software development tool that can use RSL15 and Ansenmei is wrapped (SDK) comes true, or, to compositive degree of taller solution, can use compositive the module of SIP of Murata 2EG radio frequency of RSL15.

Graph 3: Ansenmei’s end is comprised by many module to upright AoA system

In the system, emitter (Advertiser) generate CTE signal, receive by the scanner. The IQ sample book that produces from this is sent the applied program that runs to this locality PC or high in the clouds, with the angle between computational scanner and label. It is these angle changeover Cartesian coordinate next, and map arrives 2 dimension or three dimensional space.

The code of give typical examples of these two kinds of application all can be gotten freely from Ansenmei’s website, still have tool of estimation of a power at the same time, can choose communication agreement according to battery life.

The other An Sen’s beautiful partner that enlists this project still has CoreHW and Unikie. CoreHW offers the aerial array that amounts to port of 16 Chan Duantian lines board. Have switch of an AoA / AoD, use at choosing aerial and join radio frequency and digital control signal.

The blue tooth low power comsumption that Unikie offerred to be designed to track label in real time only (Bluetooth Low Energy, BLE) engine of electronic fixed position. This engine support processes data in brim server or high in the clouds, made sure flexibility also realized cost effectiveness already (graph 4) .

Graph 4: Use at the Unikie software engine of fixed position application

API interface was promoted with company system without seam compositive, provided the capability that visits complex data to build a model. Know stock flow direction, utilization rate and behavior pattern with respect to can more thorough ground so, indicate a service that is based on the position and asset management obtained striking progress.

Epilogue

Should realize blue tooth low power comsumption successfully to measure to, the key is the solution wants abiding and durable and economy is substantial. Depend on the safety with industry extremely low power comsumption MCU of blue tooth low power comsumption, the technique goes Ansenmei in the forward position that realizes AoA future innovation.

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