CN104809488A - Internet of things terminal capable of automatic adjusting launch power by using ultrasonic measured distance - Google Patents
Internet of things terminal capable of automatic adjusting launch power by using ultrasonic measured distance Download PDFInfo
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- CN104809488A CN104809488A CN201510174422.5A CN201510174422A CN104809488A CN 104809488 A CN104809488 A CN 104809488A CN 201510174422 A CN201510174422 A CN 201510174422A CN 104809488 A CN104809488 A CN 104809488A
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Abstract
The invention discloses an internet of things terminal capable of automatic adjusting launch power by using an ultrasonic measured distance. The internet of things terminal capable of automatic adjusting the launch power by using the ultrasonic measured distance comprises a main control unit, a radio frequency unit and a memory unit, wherein the internet of things terminal capable of automatic adjusting the launch power by using the ultrasonic measured distance has an ultrasonic ranging program, a ultrasonic measured distance probe is installed in a housing on the back of the internet of things terminal, a launch window and a receiving window of the ultrasonic measured distance probe are exposed on the outer face of the housing on the back of the internet of things terminal, a radio frequency antenna is installed in the housing on the back of the internet of things terminal, and located below the ultrasonic measured distance probe, a main radiation direction of the radio frequency antenna is perpendicular to the surface of the back of the housing, and a launch direction of the ultrasonic measured distance probe is parallel to the main radiation direction of the radio frequency antenna. According to the internet of things terminal capable of automatic adjusting the launch power by using the ultrasonic measured distance, the ultrasonic measured distance probe is added on a prior hand type internet of things terminal, a whole machine can adjust the launch power automatically according to a target distance after matched with software, and labor intensity of operation personnel is reduced. And simultaneously, misreading to a distant target is avoided, and therefore usability of the whole machine and reliability of a system are increased.
Description
Technical field
The present invention relates to hand-held internet-of-things terminal machine, particularly relate to a kind of field such as electronic license plate, ETC that is applied to and utilize ultrasonic ranging automatically can adjust the internet-of-things terminal of emissive power.
Background technology
Hand-held internet-of-things terminal is widely used, but in the operating process such as hair fastener, charge of ETC, electronic license plate, often run into the distance unascertainable problem of terminal transmission antenna to label, power due to emitting antenna can affect the recognition distance of label, when prepare to read above a target time, because distance is near, emissive power crosses Sheng, label below can be read simultaneously, may cause and misread.At this moment needing user to control emitting antenna to being read the distance of target or the manual emissive power that reduces is evaded and being misread, bringing very big inconvenience to user.
Summary of the invention
In view of prior art Problems existing and defect, the invention provides a kind of internet-of-things terminal utilizing ultrasonic ranging automatically can adjust emissive power.By the hand-held internet-of-things terminal scheme of design with automatic range function, terminal is before each recognition label, first determine the distance between target by ultrasonic ranging mode, then according to the power distributed data adjustment emissive power self preset, recognition distance is just covered and is read target, what avoid that different distance brings misreads, and it also avoid the inconvenience manually arranging emissive power at every turn and bring.
The present invention is realized by such technical scheme: a kind of internet-of-things terminal utilizing ultrasonic ranging automatically can adjust emissive power, comprise main control unit, radio frequency unit and storage unit, it is characterized in that, with ultrasonic ranging program on described internet-of-things terminal, ultrasonic ranging probe is installed in terminal back housing, the transmitting and receiving window of ultrasonic ranging probe is exposed at the outside of the housing at the back side, be arranged in the housing at the terminal back side for launching with the radio-frequency antenna of the radiofrequency signal being read destinations traffic, and be positioned at the below of ultrasonic ranging probe, the main radiation direction of radio-frequency antenna is perpendicular to back side of shell surface, the transmit direction of ultrasonic ranging probe is parallel to the main radiation direction of radio-frequency antenna.
Main control unit of the present invention adopts Cortex-A7 processor, and Cortex-A7 processor is connected with LPDDR3 internal memory and electric power management circuit respectively; Described storage unit is connected with Cortex-A7 processor by pin SDIO; Described ultrasonic ranging probe is connected with Cortex-A7 processor by the first UART interface; Described radio frequency unit is connected with Cortex-A7 processor by the second UART interface; Described radio-frequency antenna is connected with radio frequency unit by radio frequency line.
The beneficial effect that the present invention produces is: the design increases a ultrasonic ranging probe on original hand-held internet-of-things terminal, complete machine is made to have automatically according to the function of target range adjustment emissive power after coordinating software, arrange by hand without the need to operating personnel at every turn or deliberately keep and the distance being read target, decreasing the labour intensity of operating personnel.Avoid misreading distant object simultaneously, thus add the availability of complete machine and the reliability of system.
Accompanying drawing explanation
Fig. 1 is the longitudinal cross-sectional schematic of structure of the present invention;
Fig. 2 is circuit catenation principle block diagram of the present invention;
Fig. 3 is calibration environment Organization Chart of the present invention;
Fig. 4 is the workflow diagram of the present invention when calibrating;
Fig. 5 is environment for use Organization Chart of the present invention;
Fig. 6 is the read-write process flow diagram of the present invention when using.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
With reference to Fig. 1, a kind of internet-of-things terminal utilizing ultrasonic ranging automatically can adjust emissive power comprises main control unit 4, radio frequency unit 5 and storage unit 6, with ultrasonic ranging program on internet-of-things terminal, ultrasonic ranging probe 2 is installed in terminal back housing 1, the transmitting and receiving window of ultrasonic ranging probe 2 is exposed at the outside of the housing 1 at the back side, be arranged in the housing 1 at the terminal back side for launching with the radio-frequency antenna 3 of the radiofrequency signal being read destinations traffic, and be positioned at the below of ultrasonic ranging probe 2, the main radiation direction 3.1 of radio-frequency antenna 3 is perpendicular to housing 1 backside surface, the transmit direction 2.1 of ultrasonic ranging probe 2 is parallel to the main radiation direction 3.1 of radio-frequency antenna 3.
Ultrasonic ranging probe is arranged in machine back housing, and its transmitting and receiving window is exposed at outside the housing at the back side, is convenient to hyperacoustic transmitting and receiving.Because housing is plastic material, radiofrequency signal can pass housing, and therefore, radio-frequency antenna does not need to expose housing, is arranged on by radio-frequency antenna in the housing at the machine back side.During installation, the main radiation direction of radio-frequency antenna is perpendicular to machine backside surface.The transmit direction of ultrasonic ranging probe is parallel to the main radiation direction of radio-frequency antenna.Can keep like this ultrasonic ranging probe measurement to distance basic close to the distance be read between target with hand-held internet-of-things terminal machine.
Display screen 7 is installed in the side of internet-of-things terminal, and keyboard 8 is installed in the below of display screen 7, and housing 1 is built with battery 9.
With reference to Fig. 2, the main control unit of internet-of-things terminal of the present invention adopts Cortex-A7 processor, and Cortex-A7 processor is connected with LPDDR3 internal memory and electric power management circuit respectively; Storage unit is connected with Cortex-A7 processor by pin SDIO; Ultrasonic ranging probe is connected with Cortex-A7 processor by the first UART interface; Radio frequency unit is connected with Cortex-A7 processor by the second UART interface; Radio-frequency antenna is connected with radio frequency unit by radio frequency line.Main control unit also comprises other additional devices to maintain other conditions needed for system cloud gray model.
With reference to Fig. 3 and Fig. 4, ultrasonic ranging program comprises ultrasonic ranging calibration flow process and ultrasonic ranging read-write flow process, and ultrasonic ranging calibration flow process has the following steps:
Step one. being attached on vertical wall by being read target, internet-of-things terminal being positioned over the position being relatively read target certain distance, radio-frequency antenna main radiation direction is aimed at and is read target;
Step 2. start calibration workflow user interface, first main control unit sends distance measuring instruction to ultrasonic ranging probe, ultrasonic ranging probe is found range, and measures terminal to the distance being read target, and ultrasonic measurement distance is sent to main control unit by ultrasonic ranging probe;
Step 3. main control unit receives ultrasonic ranging and pop one's head in the ultrasonic measurement range data returned, and obtains transmission power level according to ultrasonic measurement distance by the distance/power correspondence table stored in machine, and is configured by this transmission power level and send to radio frequency unit; Radio frequency unit receives the transmission power level of configuration, and writes power configuration device;
Step 4. main control unit starts " instruction is checked in transmission " operation, instruction is checked in transmission and sends to radio frequency unit, and transmission to be checked radiofrequency signal by radio-frequency antenna and is sent to and is read target by radio frequency unit;
Step 5. main control unit judges to be read target whether return message position signalling, if there is no return message position signalling, then main control unit starts " increase power " operation, the new transmission power level of generation is configured to radio frequency unit, then continue perform subsequent step, until calibration be read target return message position; If there is return message position signalling, then preserve Distance geometry power data to storage unit;
Step 6. after confirming result, ultrasonic ranging calibration flow process terminates.
Main control unit starts " increase power " operation, and this operation waits for that being read target returns response message.If fail to receive response in 10ms, operation is judged to be "No", then start " increase power " operation, emissive power stepping is increased according to minimum 1/20 stepping to peak power of radio frequency unit, then step 3 is repeated to step 5, till the return signal receiving label, be judged to be "Yes", then enter step 6.
Predetermined power data in storage unit are obtained by calibration.During calibration, be first attached to wall or it can on the surface of reflection supersonic wave by being read separately label, terminating machine is positioned over distance label distance by operator, and antenna main radiation direction aims at label, fixes.Start calibration special software, first calibration software controls ultrasonic ranging probe and finds range, then from minimum power according to the step value of software set, progressively increase emissive power, till the return signal receiving label, record emissive power now and the distance value recorded, become one group of predetermined power.The like, the calibration of multiple distance value can be completed.
With reference to Fig. 5 and Fig. 6, ultrasonic ranging read-write flow process has the following steps:
Step one. the radio frequency main radiation direction of internet-of-things terminal machine is aimed at and is read target;
Step 2. start read-write workflow user interface, first main control unit sends distance measuring instruction to ultrasonic ranging probe, ultrasonic ranging probe is found range, and measures terminal to the distance being read target, and ultrasonic measurement distance is sent to main control unit by ultrasonic ranging probe;
Step 3. main control unit receives ultrasonic ranging and to pop one's head in the ultrasonic measurement range data returned, according to ultrasonic measurement distance, find transmission power level immediate with current ultrasonic measuring distance in the distance stored in calibration flow process/power correspondence table, 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 unit initiates " formal read-write operation " instruction;
Step 5. after confirming read-write result, ultrasonic ranging read-write flow process terminates.
As shown in Figure 5, in use, the radio frequency main radiation direction of internet-of-things terminal aimed at and be read target, operator starts recognition software to working environment framework when internet-of-things terminal whole system uses.First the main control unit of hand-held internet-of-things terminal machine starts range finding, ultrasonic ranging probe sends ultrasound wave, ultrasound wave runs into and is read label surface and is reflected back, and can calculate probe to the distance being read target after ultrasonic ranging probe receives the ultrasound wave returned according to the mistiming.The main control unit of internet-of-things terminal machine looks into " distance-predetermined power value " correspondence table according to distance value from storage unit, read out corresponding performance number, performance number is loaded into radio frequency unit, radio frequency unit adjusts emissive power according to performance number, make to be read intended recipient to performance number just reach requirement, and be distal to other target labels being read target and do not reach and wake power demand up, thus reach only to wake up and be read target, do not misread the object of other targets.
Time hand-held internet-of-things terminal formally uses, if record distance not in existing predetermined power value point, then get two points that the absolute value that is greater than and is less than this distance is minimum respectively, estimate the performance number of this range points, this performance number is sent radio frequency unit adjustment emissive power.
Claims (4)
1. the internet-of-things terminal utilizing ultrasonic ranging automatically can adjust emissive power, comprise main control unit (4), radio frequency unit (5) and storage unit (6), it is characterized in that, with ultrasonic ranging program on described internet-of-things terminal, ultrasonic ranging probe (2) is installed in terminal back housing (1), the transmitting and receiving window of ultrasonic ranging probe (2) is exposed at the outside of the housing (1) at the back side, be arranged in the housing (1) at the terminal back side for launching with the radio-frequency antenna of the radiofrequency signal being read destinations traffic (3), and be positioned at the below of ultrasonic ranging probe (2), the main radiation direction (3.1) of radio-frequency antenna (3) is perpendicular to housing (1) backside surface, the transmit direction (2.1) of ultrasonic ranging probe (2) is parallel to the main radiation direction (3.1) of radio-frequency antenna (3).
2. a kind of internet-of-things terminal utilizing ultrasonic ranging automatically can adjust emissive power according to claim 1, it is characterized in that, described main control unit adopts Cortex-A7 processor, and Cortex-A7 processor is connected with LPDDR3 internal memory and electric power management circuit respectively; Described storage unit is connected with Cortex-A7 processor by pin SDIO; Described ultrasonic ranging probe is connected with Cortex-A7 processor by the first UART interface; Described radio frequency unit is connected with Cortex-A7 processor by the second UART interface; Described radio-frequency antenna is connected with radio frequency unit by radio frequency line.
3. a kind of internet-of-things terminal utilizing ultrasonic ranging automatically can adjust emissive power according to claim 1, it is characterized in that, described ultrasonic ranging program comprises ultrasonic ranging calibration flow process and ultrasonic ranging read-write flow process, and ultrasonic ranging calibration flow process has the following steps:
Step one. being attached on vertical wall by being read target, internet-of-things terminal being positioned over the position being relatively read target certain distance, radio-frequency antenna main radiation direction is aimed at and is read target;
Step 2. start calibration workflow user interface, first main control unit sends distance measuring instruction to ultrasonic ranging probe, ultrasonic ranging probe is found range, and measures terminal to the distance being read target, and ultrasonic measurement distance is sent to main control unit by ultrasonic ranging probe;
Step 3. main control unit receives ultrasonic ranging and pop one's head in the ultrasonic measurement range data returned, and obtains transmission power level according to ultrasonic measurement distance by the distance/power correspondence table stored in machine, and is configured by this transmission power level and send to radio frequency unit; Radio frequency unit receives the transmission power level of configuration, and writes power configuration device;
Step 4. main control unit starts " instruction is checked in transmission " operation, instruction is checked in transmission and sends to radio frequency unit, and transmission to be checked radiofrequency signal by radio-frequency antenna and is sent to and is read target by radio frequency unit;
Step 5. main control unit judges to be read target whether return message position signalling, if there is no return message position signalling, then main control unit starts " increase power " operation, the new transmission power level of generation is configured to radio frequency unit, then continue perform subsequent step, until calibration be read target return message position; If there is return message position signalling, then preserve Distance geometry power data to storage unit;
Step 6. after confirming result, ultrasonic ranging calibration flow process terminates.
4. a kind of internet-of-things terminal utilizing ultrasonic ranging automatically can adjust emissive power according to claim 3, is characterized in that, described ultrasonic ranging read-write flow process has the following steps:
Step one. the radio frequency main radiation direction of internet-of-things terminal machine is aimed at and is read target;
Step 2. start read-write workflow user interface, first main control unit sends distance measuring instruction to ultrasonic ranging probe, ultrasonic ranging probe is found range, and measures terminal to the distance being read target, and ultrasonic measurement distance is sent to main control unit by ultrasonic ranging probe;
Step 3. main control unit receives ultrasonic ranging and to pop one's head in the ultrasonic measurement range data returned, according to ultrasonic measurement distance, find transmission power level immediate with current ultrasonic measuring distance in the distance stored in calibration flow process/power correspondence table, 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 unit initiates " formal read-write operation " instruction;
Step 5. after confirming read-write result, ultrasonic ranging read-write flow process terminates.
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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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Cited By (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 |
| CN110610563A (en) * | 2019-08-06 | 2019-12-24 | 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 |
| CN115190442A (en) * | 2022-09-05 | 2022-10-14 | 济南福深兴安科技有限公司 | Mine accurate positioning system based on UWB |
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| 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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Patent Citations (3)
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| 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 |
Cited By (5)
| 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 |
| CN110610563A (en) * | 2019-08-06 | 2019-12-24 | 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 |
| 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 |
| CN115190442A (en) * | 2022-09-05 | 2022-10-14 | 济南福深兴安科技有限公司 | Mine accurate positioning system based on UWB |
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