CN101685567B - POS machine with accurate power attenuator - Google Patents
POS machine with accurate power attenuator Download PDFInfo
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- CN101685567B CN101685567B CN2008102163332A CN200810216333A CN101685567B CN 101685567 B CN101685567 B CN 101685567B CN 2008102163332 A CN2008102163332 A CN 2008102163332A CN 200810216333 A CN200810216333 A CN 200810216333A CN 101685567 B CN101685567 B CN 101685567B
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Abstract
A POS machine (10) with an accurate power attenuator comprises a microcontroller unit (MCU) (11), a radio-frequency emitting and receiving modem (12), an accurate power attenuator (13) and a radio-frequency antenna (14), wherein the radio-frequency emitting and receiving modem (12) is electrically connected with the MCU (11) and the accurate power attenuator (13) respectively; the accurate power attenuator (13) is electrically connected with the radio-frequency antenna (14); and the accurate power attenuator (13) is electrically connected with a corresponding port of the MCU (11) through a bus. The instructions of the MCU (11) are modulated into radio-frequency signals by the radio-frequency emitting and receiving modem (12), the radio-frequency signals are adjusted to the preset emission power by the accurate power attenuator (13), and finally, the radio-frequency signals are emitted by the radio-frequency antenna (14), thereby achieving the purpose of accurately controlling the communication distance of the POS machine (10). By adopting the technology of the invention, the communication distance of the POS machine can be accurately controlled in the required range by the accurate power attenuator.
Description
Technical field the present invention relates to the device of read-out recording carrier, particularly relates to the device that adopts electromagnetic field to change read-out recording carrier, relates in particular to the POS machine with accurate power attenuator.
The present POS machine of background technology has been widely used in the trading processing of retail business and service trade, development along with technology, the POS machine can utilize REID and stick into row communication, but, radiofrequency signal is strong more, communication distance is just far away more, and this has brought transaction security hidden danger also for simultaneously the POS machine of using radio frequency recognizing technique, and designing a kind of POS machine that can accurately control radiofrequency signal is to seem very necessary.
The summary of the invention the technical problem to be solved in the present invention be to avoid above-mentioned the deficiencies in the prior art part and provide a kind of with accurate power attenuator the POS machine and the method for control communication distance.
The present invention solve the technical problem can be by realizing by the following technical solutions: a kind of POS machine with accurate power attenuator is characterized in that: comprise microcontroller MCU, radio-frequency transmissions and receiving modem, accurately power attenuator and radio-frequency antenna;
Described radio-frequency transmissions and receiving modem and accurately power attenuator respectively the bus by separately be electrically connected with the corresponding port of described microcontroller MCU, and described accurate power attenuator is electrically connected with radio-frequency antenna and radio-frequency transmissions and receiving modem respectively;
The instruction of described microcontroller MCU is modulated into radiofrequency signal by radio-frequency transmissions and receiving modem, decay to default transmitting power through accurate power attenuator again, launch by radio-frequency antenna at last, thereby realize the accurately communication distance of control POS machine.
Described bus comprises spi bus.
Described radio-frequency transmissions and receiving modem, adopting nordic company model is the transmission-receiving function of the chip realization radiofrequency signal of NRF24L01.
Described accurate power attenuator, adopting Peregrine Semiconductor company model is the chip realization attenuation function of PE4302.
The present invention solve the technical problem can also be by further realizing by the following technical solutions: a kind of method of accurate control communication distance is provided, and based on the POS machine with accurate power attenuator, described method comprises step:
A, microcontroller MCU detect current communication distance, this communication distance are converted into the pad value of accurate power attenuator by microcontroller MCU by interior microprogram;
B. relatively with the preset value among conversion gained pad value and the microcontroller MCU, if pad value greater than this preset value, then microcontroller MCU sends attenuation instructions to accurate power attenuator;
C. accurately power attenuator receives attenuation instructions that microcontroller MCU sends promptly according to this attenuation instructions radio-frequency (RF) signal strength;
D. radio-frequency transmissions and receiving modem are fixed the power of this radiofrequency signal simultaneously, thereby communication distance are controlled in the desired value according to the radio-frequency (RF) signal strength emission after decaying.
The described microprogram of steps A has been solidificated in the interior memory of microcontroller MCU in advance.
Compare with prior art, the beneficial effect of technical solution of the present invention is: can accurately be controlled within the desired scope by the communication distance of accurate power attenuator with the POS machine.
Description of drawings Fig. 1 is the POS machine building-block of logic of the accurate power attenuator of band of the present invention.
Embodiment is described in further detail below in conjunction with the most preferred embodiment shown in each accompanying drawing.
The POS machine 10 of the present invention's the accurate power attenuator of band as shown in Figure 1, comprises microcontroller MCU11, radio-frequency transmissions and receiving modem 12, accurate power attenuator 13 and radio-frequency antenna 14;
Described radio-frequency transmissions and receiving modem 12 and accurately power attenuator 13 respectively the bus by separately be electrically connected with the corresponding port of described microcontroller MCU11, and described accurate power attenuator 13 is electrically connected with radio-frequency antenna 14 and radio-frequency transmissions and receiving modem 12 respectively;
The instruction of described microcontroller MCU11 is modulated into radiofrequency signal by radio-frequency transmissions and receiving modem 12, decay to default transmitting power through accurate power attenuator 13 again, launch by radio-frequency antenna 14 at last, thereby realize the accurately communication distance of control POS machine 10.
As shown in Figure 1, described bus comprises spi bus.
Described radio-frequency transmissions and receiving modem 12, adopting nordic company model is the transmission-receiving function of the chip realization radiofrequency signal of NRF24L01.
Described accurate power attenuator 13, adopting Peregrine Semiconductor company model is the chip realization attenuation function of PE4302.
The present invention solve the technical problem can also be by further realizing by the following technical solutions: a kind of method of accurate control communication distance is provided, and based on the POS machine 10 with accurate power attenuator, described method comprises step:
A, microcontroller MCU11 detect current communication distance, this communication distance are converted into the pad value of accurate power attenuator 13 by microcontroller MCU11 by interior microprogram;
B. relatively with the preset value among conversion gained pad value and the microcontroller MCU11, if pad value greater than this preset value, then microcontroller MCU11 sends attenuation instructions to accurate power attenuator 13;
C. accurately power attenuator 13 receives attenuation instructions that microcontroller MCU11 sends promptly according to this attenuation instructions radio-frequency (RF) signal strength;
D. radio-frequency transmissions and receiving modem 12 are fixed the power of this radiofrequency signal simultaneously, thereby communication distance are controlled in the desired value according to the radio-frequency (RF) signal strength emission after decaying.
The described microprogram of steps A has been solidificated in the interior memory of microcontroller MCU11 in advance.
Above-mentioned is preferred implementation procedure of the present invention, and common variation and replacement that those skilled in the art carries out on basis of the present invention are included within protection scope of the present invention.
Claims (6)
1. the POS machine (10) with accurate power attenuator is characterized in that: comprise microcontroller MCU (11), radio-frequency transmissions and receiving modem (12), accurate power attenuator (13) and radio-frequency antenna (14);
Described radio-frequency transmissions and receiving modem (12) and accurately power attenuator (13) respectively the bus by separately be electrically connected and the same respectively radio-frequency antenna of described accurate power attenuator (13) (14) and radio-frequency transmissions and receiving modem (12) electrical connection with the corresponding port of described microcontroller MCU (11);
The instruction of described microcontroller MCU (11) is modulated into radiofrequency signal by radio-frequency transmissions and receiving modem (12), pass through accurate power attenuator (13) again and decay to default transmitting power, launch by radio-frequency antenna (14) at last, thereby realize the accurately communication distance of control POS machine (10).
2. according to the POS machine (10) of the accurate power attenuator of the described band of claim 1, it is characterized in that:
Described " bus " is spi bus.
3. according to the POS machine (10) of the accurate power attenuator of the described band of claim 1, it is characterized in that:
Described radio-frequency transmissions and receiving modem (12), adopting nordic company model is the transmission-receiving function of the chip realization radiofrequency signal of NRF24L01.
4. according to the POS machine (10) of the accurate power attenuator of the described band of claim 1, it is characterized in that:
Described accurate power attenuator (13), adopting Peregrine Semiconductor company model is the chip realization attenuation function of PE4302.
5. accurate method of control communication distance, the POS machine (10) based on accurate power attenuator is characterized in that comprising step:
A, microcontroller MCU (11) detect current communication distance, this communication distance are converted into the pad value of accurate power attenuator (13) by microcontroller MCU (11) by interior microprogram;
B. relatively with the preset value among conversion gained pad value and the microcontroller MCU (11), if pad value greater than this preset value, then microcontroller MCU (11) sends attenuation instructions to accurate power attenuator (13);
C. accurately power attenuator (13) receives attenuation instructions that microcontroller MCU (11) sends promptly according to this attenuation instructions radio-frequency (RF) signal strength;
D. radio-frequency transmissions and receiving modem (12) are fixed the power of this radiofrequency signal simultaneously, thereby communication distance are controlled in the desired value according to the radio-frequency (RF) signal strength emission after decaying.
6. according to the method for the described accurate command range of claim 5, it is characterized in that:
The described microprogram of steps A has been solidificated in the interior memory of microcontroller MCU (11) in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102163332A CN101685567B (en) | 2008-09-23 | 2008-09-23 | POS machine with accurate power attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102163332A CN101685567B (en) | 2008-09-23 | 2008-09-23 | POS machine with accurate power attenuator |
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| Publication Number | Publication Date |
|---|---|
| CN101685567A CN101685567A (en) | 2010-03-31 |
| CN101685567B true CN101685567B (en) | 2011-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102163332A Active CN101685567B (en) | 2008-09-23 | 2008-09-23 | POS machine with accurate power attenuator |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937677B (en) * | 2012-10-25 | 2016-12-07 | 上海杉德金卡信息系统科技有限公司 | A kind of mobile POS wireless performance volume production method of testing |
| CN107221111B (en) * | 2017-05-26 | 2018-07-13 | 深圳飞人网络信息技术有限公司 | Near field wireless POS devices, near field method of mobile payment and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006091585A2 (en) * | 2005-02-22 | 2006-08-31 | Texas Instruments Incorporated | System and method for disabling an rfid tag |
| CN2938244Y (en) * | 2006-04-11 | 2007-08-22 | 北京兴华邦科技有限公司 | Intelligent card POS apparatus |
| CN101266641A (en) * | 2007-03-17 | 2008-09-17 | 深圳市碧沙科技有限公司 | Active electronic label gain controllable card reader |
-
2008
- 2008-09-23 CN CN2008102163332A patent/CN101685567B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006091585A2 (en) * | 2005-02-22 | 2006-08-31 | Texas Instruments Incorporated | System and method for disabling an rfid tag |
| CN2938244Y (en) * | 2006-04-11 | 2007-08-22 | 北京兴华邦科技有限公司 | Intelligent card POS apparatus |
| CN101266641A (en) * | 2007-03-17 | 2008-09-17 | 深圳市碧沙科技有限公司 | Active electronic label gain controllable card reader |
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| Publication number | Publication date |
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| CN101685567A (en) | 2010-03-31 |
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