CN104809488B - It is a kind of using ultrasonic ranging can adjust automatically transmission power internet-of-things terminal - Google Patents
It is a kind of using ultrasonic ranging can adjust automatically transmission power internet-of-things terminal Download PDFInfo
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- CN104809488B CN104809488B CN201510174422.5A CN201510174422A CN104809488B CN 104809488 B CN104809488 B CN 104809488B CN 201510174422 A CN201510174422 A CN 201510174422A CN 104809488 B CN104809488 B CN 104809488B
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Abstract
The invention discloses it is a kind of using ultrasonic ranging can adjust automatically transmission power internet-of-things terminal.The terminal includes main control unit, radio frequency unit and memory cell, ultrasonic ranging program is carried on internet-of-things terminal, ultrasonic ranging probe is installed in terminal back housing, the transmitting of ultrasonic ranging probe and reception window are exposed at the outside of the housing at the back side, radio-frequency antenna is arranged in the housing at the terminal back side, and positioned at the lower section of ultrasonic ranging probe, the main radiation direction of radio-frequency antenna is perpendicular to back side of shell surface, main radiation direction of the direction of the launch that ultrasonic ranging is popped one's head in parallel to radio-frequency antenna.The design adds a ultrasonic ranging probe on original hand-held internet-of-things terminal, causes complete machine to have the function of adjusting transmission power automatically according to target range after coordinating software, reduces the labor intensity of operating personnel.Avoid simultaneously and distant object is misread, so as to add the reliability of the availability of complete machine and system.
Description
Technical field
The present invention relates to hand-held internet-of-things terminal machine, more particularly to a kind of fields such as electronic license plate, ETC that are applied to utilize
Ultrasonic ranging can adjust automatically transmission power internet-of-things terminal.
Background technology
Hand-held internet-of-things terminal is widely used, but in the operating process such as ETC, the hair fastener of electronic license plate, charge, warp
The unascertainable problem of distance of terminal transmission antenna to label is commonly encountered, because the power of transmitting antenna can influence the knowledge of label
Distance is read, when preparing to read an above target, because distance is near, transmission power crosses Sheng, can read label below simultaneously,
It may cause to misread.Person is not at this moment needed to use to control transmitting antenna to come to by the distance of reading target or the manual transmission power that reduces
Evade and misreading, very big inconvenience is brought to user.
The content of the invention
In view of the problem of prior art is present and defect, the present invention provides one kind can adjust automatically hair using ultrasonic ranging
Penetrate the internet-of-things terminal of power.By designing the hand-held internet-of-things terminal scheme with automatic range function, terminal is each
Before distinguishing label, first pass through ultrasonic ranging mode and determine the distance between target, then according to itself default power point
Cloth data point reuse transmission power so that the just covering of recognition distance is read target, and avoid that different distance brings misreads,
Avoid the inconvenience for setting transmission power to bring manually every time.
The present invention is realized by such technical scheme：One kind can adjust automatically transmission power using ultrasonic ranging
Internet-of-things terminal, including main control unit, radio frequency unit and memory cell, it is characterised in that carried on the internet-of-things terminal
Ultrasonic ranging program, ultrasonic ranging probe is installed in terminal back housing, the transmitting and connect that ultrasonic ranging is popped one's head in
The outside that window is exposed at the housing at the back side is received, is arranged on eventually for launching and being read the radio-frequency antenna of radiofrequency signal of destinations traffic
In the housing for holding the back side, and positioned at the lower section of ultrasonic ranging probe, the main radiation direction of radio-frequency antenna is perpendicular to back side of shell
Surface, main radiation direction of the direction of the launch that ultrasonic ranging is popped one's head in parallel to radio-frequency antenna.
Main control unit of the present invention uses Cortex-A7 processors, Cortex-A7 processors respectively with LPDDR3 internal memories
Connected with electric power management circuit；The memory cell is connected by pin SDIO with Cortex-A7 processors；The ultrasound
It is connected away from probe by the first UART interface with Cortex-A7 processors；The radio frequency unit by the second UART interface with
Cortex-A7 processors connect；The radio-frequency antenna is connected by radio frequency line with radio frequency unit.
The invention has the advantages that：The design increases a ultrasonic wave on original hand-held internet-of-things terminal
Range finding probe, cause complete machine that there is the function of adjusting transmission power automatically according to target range after coordinating software, without operator
The each distance for setting by hand or deliberately keeping and be read target of member, reduce the labor intensity of operating personnel.Keep away simultaneously
Exempt to misread distant object, so as to add the reliability of the availability of complete machine and system.
Brief description of the drawings
Fig. 1 is structure longitudinal direction of the present invention schematic cross-sectional view；
Fig. 2 is circuit catenation principle block diagram of the present invention；
Fig. 3 is calibration environment Organization Chart of the present invention；
Workflow diagram when Fig. 4 is present invention calibration；
Fig. 5 is use environment Organization Chart of the present invention；
Fig. 6 is the read-write flow chart when present invention uses.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described：
Reference picture 1, it is a kind of using ultrasonic ranging can the internet-of-things terminal of adjust automatically transmission power include main control unit
4th, radio frequency unit 5 and memory cell 6, ultrasonic ranging program is carried on internet-of-things terminal, is provided with terminal back housing 1
Ultrasonic ranging probe 2, ultrasonic ranging probe 2 transmitting and receive window be exposed at the back side housing 1 outside, for launch with
The radio-frequency antenna 3 for being read the radiofrequency signal of destinations traffic is arranged in the housing 1 at the terminal back side, and is visited positioned at ultrasonic ranging
First 2 lower section, the main radiation direction 3.1 of radio-frequency antenna 3 is perpendicular to the backside surface of housing 1, the launch party of ultrasonic ranging probe 2
To 2.1 parallel to radio-frequency antenna 3 main radiation direction 3.1.
Ultrasonic ranging probe is arranged in machine back housing, and it is launched and received window and is exposed at outside the housing at the back side,
It is easy to the transmitting and reception of ultrasonic wave.Because housing is plastic material, radiofrequency signal can pass through housing, therefore, radio-frequency antenna
Housing need not be exposed, radio-frequency antenna is arranged in the housing at the machine back side.During installation, the main radiation direction of radio-frequency antenna is hung down
Directly in machine backside surface.Main radiation direction of the direction of the launch of ultrasonic ranging probe parallel to radio-frequency antenna.So can be with
Keep ultrasonic ranging probe measurement to distance substantially with hand-held internet-of-things terminal machine to being read the distance between target
It is close.
The side installation display screen 7 of internet-of-things terminal, the lower section installation keyboard 8 of display screen 7, housing 1 is built with battery 9.
Reference picture 2, the main control unit of internet-of-things terminal of the invention use Cortex-A7 processors, Cortex-A7 processing
Device is connected with LPDDR3 internal memories and electric power management circuit respectively；Memory cell is connected by pin SDIO and Cortex-A7 processors
Connect；Ultrasonic ranging probe is connected by the first UART interface with Cortex-A7 processors；Radio frequency unit is connect by the 2nd UART
Mouth is connected with Cortex-A7 processors；Radio-frequency antenna is connected by radio frequency line with radio frequency unit.It is auxiliary that main control unit also includes other
Device is helped to maintain the other conditions needed for system operation.
Reference picture 3 and Fig. 4, ultrasonic ranging program include ultrasonic ranging calibration flow and ultrasonic ranging read-write stream
Journey, ultrasonic ranging calibration flow have the following steps：
Step 1 is attached to target is read on vertical wall, and internet-of-things terminal is positioned over and is read target relatively
The position of certain distance, the alignment of radio-frequency antenna main radiation direction is set to be read target；
Step 2 starts calibration workflow user interface, and main control unit sends distance measuring instruction to ultrasonic ranging probe first,
Ultrasonic ranging probe carries out ranging, measures terminal and is popped one's head in the distance for being read target, ultrasonic ranging by ultrasound
Span is from being sent to main control unit；
Step 3 main control units receive the ultrasonic measurement range data that ultrasonic ranging probe returns, according to ultrasonic wave
Measurement distance obtains transmission power level by distance/power corresponding table of machine memory storage, and this transmission power level is configured and sent
To radio frequency unit；Radio frequency unit receives the transmission power level of configuration, and write power configuration device；
Step 4 main control units start " instruction is checked in transmission " operation, and transmission is checked into instruction and is sent to radio frequency unit, is penetrated
Transmission by radio-frequency antenna is checked radiofrequency signal and is sent to by frequency unit is read target；
Step 5 main control units judge be read target whether return information position signalling, if there is no return information position
Signal, then main control unit startup " increase power " operation, is allocated to radio frequency unit by the transmission power level for producing new, then proceedes to
Subsequent step is performed, target return information position is read until calibration；If there is return information position signalling, preserve away from
From with power data to memory cell；
After step 6 confirms result, ultrasonic ranging calibration flow terminates.
Main control unit starts " increase power " operation, and the operation, which waits, is read target return response message.If
Fail to receive response in 10ms, operation is determined as "No", then starts " increase power " operation, according to the minimum of radio frequency unit to most
Powerful 1/20 stepping increases one stepping of transmission power, then repeat step three to step 5, until receiving label
Untill return signal, it is determined as "Yes", then into step 6.
Predetermined power data in memory cell are obtained by calibrating.During calibration, it individually will be read label first and be attached to
Wall or its can be so that on the surface of reflectance ultrasound ripple, terminating machine be positioned over apart from label distance, the main spoke of antenna by operator
Direction alignment label is penetrated, is fixed.Start calibration special-purpose software, calibration software controls ultrasonic ranging probe to be surveyed first
Away from then transmission power being incrementally increased according to the step value of software set since minimum power, until receive returning for label
Untill letter in reply number, transmission power now and the distance value measured are recorded, turns into one group of predetermined power.The like, it can complete
The calibration of multiple distance values.
Reference picture 5 and Fig. 6, ultrasonic ranging read-write flow have the following steps：
The radio frequency main radiation direction alignment of internet-of-things terminal machine is read target by step 1；
Step 2 starts read-write workflow user interface, and main control unit sends distance measuring instruction to ultrasonic ranging probe first,
Ultrasonic ranging probe carries out ranging, measures terminal and is popped one's head in the distance for being read target, ultrasonic ranging by ultrasound
Span is from being sent to main control unit；
Step 3 main control units receive the ultrasonic measurement range data that ultrasonic ranging probe returns, according to ultrasonic wave
Measurement distance, found in the distance stored in calibrating flow/power corresponding table immediate with current ultrasonic measurement distance
Transmission power level, and the configuration of this transmission power level is sent to radio frequency unit；Radio frequency unit receives the transmission power level of configuration, and
Write power configuration device；
Step 4 main control units initiate " formal read-write operation " instruction；
After step 5 confirms read-write result, ultrasonic ranging read-write flow terminates.
Working environment framework when internet-of-things terminal whole system uses is as shown in figure 5, when in use, by internet-of-things terminal
The alignment of radio frequency main radiation direction be read target, operator starts recognition software.The master control list of hand-held internet-of-things terminal machine
Member starts ranging first, and ultrasonic ranging probe sends ultrasonic wave, and ultrasonic wave, which runs into, to be read label surface and be reflected back, and is surpassed
Sound ranging pops one's head in receive can calculate probe to the distance for being read target after the ultrasonic wave of return according to the time difference.Thing
The main control unit of networked terminals machine looks into " distance-predetermined power value " corresponding table according to distance value from memory cell, reads out correspondingly
Performance number, performance number is loaded into radio frequency unit, radio frequency unit adjusts transmission power according to performance number so that is read target
The performance number received just reaches requirement, and be distal to be read target other target labels do not reach wake-up needed for power,
Target is read so as to reach to only wake up, does not misread the purpose of other targets.
When hand-held internet-of-things terminal formally uses, if measuring distance not in existing predetermined power value point,
Two points minimum larger and smaller than the absolute value of this distance are then taken respectively, the performance number of this range points are estimated, by this work(
Rate value sends radio frequency unit adjustment transmission power.
Claims (2)
1. it is a kind of using ultrasonic ranging can adjust automatically transmission power internet-of-things terminal, including main control unit（4）, radio frequency list
Member（5）And memory cell（6）, it is characterised in that ultrasonic ranging program is carried on the internet-of-things terminal, in terminal back side shell
Body（1）Ultrasonic ranging probe is inside installed（2）, ultrasonic ranging probe（2）Transmitting and receive window and be exposed at the housing at the back side
（1）Outside, the radio-frequency antenna of the radiofrequency signal for launching and being read destinations traffic（3）Housing installed in the terminal back side
（1）It is interior, and popped one's head in positioned at ultrasonic ranging（2）Lower section, radio-frequency antenna（3）Main radiation direction（3.1）Perpendicular to housing（1）
Backside surface, ultrasonic ranging probe（2）The direction of the launch（2.1）Parallel to radio-frequency antenna（3）Main radiation direction（3.1）；
The ultrasonic ranging program includes ultrasonic ranging calibration flow and ultrasonic ranging read-write flow, ultrasonic ranging school
Quasi- flow has the following steps：
Step 1 is attached to target is read on vertical wall, and internet-of-things terminal is positioned over certain with respect to target is read
The position of distance, the alignment of radio-frequency antenna main radiation direction is set to be read target；
Step 2 starts calibration workflow user interface, and main control unit sends distance measuring instruction to ultrasonic ranging probe first, ultrasound
Ripple range finding probe carries out ranging, measures terminal and is popped one's head in the distance for being read target, ultrasonic ranging by ultrasound span
From being sent to main control unit；
Step 3 main control units receive the ultrasonic measurement range data that ultrasonic ranging probe returns, according to ultrasonic measurement
Distance obtains transmission power level by distance/power corresponding table of machine memory storage, and the configuration of this transmission power level is sent to and penetrated
Frequency unit；Radio frequency unit receives the transmission power level of configuration, and write power configuration device；
Step 4 main control units start " instruction is checked in transmission " operation, and transmission is checked into instruction and is sent to radio frequency unit, radio frequency list
Transmission by radio-frequency antenna is checked radiofrequency signal and is sent to by member is read target；
Step 5 main control units judge be read target whether return information position signalling, if there is no return information position signalling,
Then main control unit starts " increase power " operation, and the transmission power level for producing new is allocated into radio frequency unit, then proceedes to perform
Subsequent step, target return information position is read until calibration；If there is return information position signalling, preserve distance and
Power data is to memory cell；
After step 6 confirms result, ultrasonic ranging calibration flow terminates；
The ultrasonic ranging read-write flow has the following steps：
The radio frequency main radiation direction alignment of internet-of-things terminal machine is read target by step 1；
Step 2 starts read-write workflow user interface, and main control unit sends distance measuring instruction to ultrasonic ranging probe first, ultrasound
Ripple range finding probe carries out ranging, measures terminal and is popped one's head in the distance for being read target, ultrasonic ranging by ultrasound span
From being sent to main control unit；
Step 3 main control units receive the ultrasonic measurement range data that ultrasonic ranging probe returns, according to ultrasonic measurement
Distance, found in the distance stored in calibrating flow/power corresponding table and the immediate transmitting of current ultrasonic measurement distance
Performance number, and the configuration of this transmission power level is sent to radio frequency unit；Radio frequency unit receives the transmission power level of configuration, and writes
Power configuration device；
Step 4 main control units initiate " formal read-write operation " instruction；
After step 5 confirms read-write result, ultrasonic ranging read-write flow terminates.
2. it is according to claim 1 it is a kind of using ultrasonic ranging can adjust automatically transmission power internet-of-things terminal, its
Be characterised by, the main control unit uses Cortex-A7 processors, Cortex-A7 processors respectively with LPDDR3 internal memories and electricity
Power management circuits connect；The memory cell is connected by pin SDIO with Cortex-A7 processors；The ultrasonic ranging is visited
Head is connected by the first UART interface with Cortex-A7 processors；The radio frequency unit passes through the second UART interface and Cortex-
A7 processors connect；The radio-frequency antenna is connected by radio frequency line with radio frequency unit.
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| CN201510174422.5A CN104809488B (en) | 2015-04-14 | 2015-04-14 | It is a kind of using ultrasonic ranging can adjust automatically transmission power internet-of-things terminal |
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| CN201510174422.5A CN104809488B (en) | 2015-04-14 | 2015-04-14 | It is a kind of using ultrasonic ranging can adjust automatically transmission power internet-of-things terminal |
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| CN104809488B true CN104809488B (en) | 2017-12-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107843872A (en) * | 2017-09-15 | 2018-03-27 | 南京轩世琪源软件科技有限公司 | A kind of real-time automatic station-keeping system of indoor radio frequency formula |
| CN110610563B (en) * | 2019-08-06 | 2020-09-22 | 珠海格力电器股份有限公司 | Method, device, equipment and storage medium for adjusting wake-up distance of electronic lock |
| CN112630781A (en) * | 2020-11-27 | 2021-04-09 | 深圳数联天下智能科技有限公司 | Ultrasonic distance measuring device and ultrasonic distance measuring method |
| CN115190442B (en) * | 2022-09-05 | 2023-06-23 | 济南福深兴安科技有限公司 | Mine accurate positioning system based on UWB |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176009A (en) * | 2011-01-24 | 2011-09-07 | 北京北大千方科技有限公司 | Microwave distance measurement-based antenna positioning method and device |
| WO2012097548A1 (en) * | 2011-01-18 | 2012-07-26 | 中兴通讯股份有限公司 | Communication apparatus and method for mobile payment device of non-contact type |
| CN103839092A (en) * | 2014-03-06 | 2014-06-04 | 太仓欧卡网络服务有限公司 | Ultrahigh-frequency RFID reader-writer |
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- 2015-04-14 CN CN201510174422.5A patent/CN104809488B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012097548A1 (en) * | 2011-01-18 | 2012-07-26 | 中兴通讯股份有限公司 | Communication apparatus and method for mobile payment device of non-contact type |
| CN102176009A (en) * | 2011-01-24 | 2011-09-07 | 北京北大千方科技有限公司 | Microwave distance measurement-based antenna positioning method and device |
| CN103839092A (en) * | 2014-03-06 | 2014-06-04 | 太仓欧卡网络服务有限公司 | Ultrahigh-frequency RFID reader-writer |
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