CN204463180U - A kind of high band rfid interrogator module - Google Patents
A kind of high band rfid interrogator module Download PDFInfo
- Publication number
- CN204463180U CN204463180U CN201520158110.0U CN201520158110U CN204463180U CN 204463180 U CN204463180 U CN 204463180U CN 201520158110 U CN201520158110 U CN 201520158110U CN 204463180 U CN204463180 U CN 204463180U
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- module
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- radio
- high band
- power amplifier
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Abstract
The utility model relates to a kind of wireless identification device, more specifically to a kind of high band rfid interrogator module, can be used for the information read and write at a distance in RFID label tag, and information is passed to host computer, adopts modular design, compact conformation.Main control module is connected with radio-frequency module; SRAM, FLASH and impact damper are all connected on arm processor.Arm processor also can be connected with upper main frame.Power supply is connected with power management module; Processor, temperature compensating crystal oscillator are all connected by electric wire with power management module with power amplifier, and PR900 chip selected by processor, and temperature compensating crystal oscillator is also connected with processor.Processor is communicated with balance/imbalance transducer by TX sending module, balance/imbalance transducer is communicated with power amplifier by TX sending module, and signal amplifies and by TX sending module, signal sent to fiber coupler by power amplifier.Radio-frequency module is connected by fiber coupler with antenna.
Description
Technical field
The utility model relates to a kind of wireless identification device, more specifically to a kind of high band rfid interrogator module.
Background technology
Along with the development of Internet of Things, all over the world, many industries are widely applied RFID technique, the aspects such as such as industrial logistics, intelligent transportation, electronic entrance ticket and agricultural production.In agricultural modernization plantation, use many electronic tags and carry out Information Monitoring, rfid interrogator can be utilized to obtain the information in electronic tag, to detect the growth situation of plant at any time.Electronic tag and reader realize the Space Coupling of radiofrequency signal by coupling element, realize the exchange of data and energy in coupling channel.The rfid system decipherment distance of high band is far away, can identify multiple object simultaneously, also can be used for many rugged surroundings.High band RFID reader has very large development prospect.
Summary of the invention
The technical matters that the utility model mainly solves is: provide a kind of high band rfid interrogator module, can be used for the information read and write at a distance in RFID label tag, and information is passed to host computer, adopts modular design, compact conformation.
For solving the problems of the technologies described above, the new a kind of high band rfid interrogator module of this practicality, comprises main control module, radio-frequency module and Anneta module, can be used for the information read and write at a distance in RFID label tag, and information is passed to host computer.Main control module is connected with radio-frequency module.Radio-frequency module main control module inside is integrated with arm processor, CPLD, SRAM, FLASH and impact damper.CPLD is connected with FLASH with impact damper, dsp processor.SRAM, FLASH and impact damper are all connected on arm processor.Arm processor also can be connected with upper main frame.Radio-frequency module inside is integrated with power supply, power management module, balance/imbalance transducer, processor, temperature compensating crystal oscillator, power amplifier and fiber coupler.Power supply is connected with power management module.Processor, temperature compensating crystal oscillator are all connected by electric wire with power management module with power amplifier, and PR900 chip selected by processor, and PR900 inside is integrated with radio-frequency (RF) transceiver, baseband modulation and detuner, single-chip microcomputer, FLASH, SRAM and UART.Temperature compensating crystal oscillator is also connected with processor.Processor is communicated with balance/imbalance transducer by TX sending module, balance/imbalance transducer is communicated with power amplifier by TX sending module, and signal amplifies and by TX sending module, signal sent to fiber coupler by power amplifier.Radio-frequency module is connected by fiber coupler with antenna, and the signal attenuation that power amplifier sends over by fiber coupler sends to PR900, antenna is passed the signal of coming and sends PR900 to.The signal that PR900 is sent by RX receiver module reception fiber coupler.
Arm processor in described main control module is connected with the PR900 chip on radio-frequency module.
Described arm processor is also communicated by impact damper with radio-frequency module.
Described temperature compensating crystal oscillator selects frequency to be the DSA321SCA temperature complement voltage-control crystal resonator of 19.2MHZ.
Described temperature compensating crystal oscillator is connected by frequency multiplier circuit with PR900.
The beneficial effect of a kind of high band rfid interrogator of the utility model module is:
A. the information in electronic tag can be identified at a distance;
B. high band is operated in.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and specific implementation method, the utility model is described in more detail.
Fig. 1 is the structured flowchart of a kind of high band rfid interrogator of the utility model module.
Fig. 2 is the radio-frequency module structured flowchart of a kind of high band rfid interrogator of the utility model module.
Fig. 3 is the main control module structured flowchart of a kind of high band rfid interrogator of the utility model module.
Embodiment
In FIG, the utility model relates to a kind of wireless identification device, more specifically to a kind of high band rfid interrogator module, comprises main control module, radio-frequency module and Anneta module.Main control module inside is integrated with dsp processor, CPLD, SRAM, FLASH and impact damper.CPLD is connected with FLASH with impact damper, arm processor.SRAM, FLASH and impact damper are all connected on arm processor.Arm processor also can be connected with upper main frame.The process that arm processor is responsible for program runs and is responsible for transmission of information to host computer, realizes the communication of read write line and external unit.CPLD completes the logic control of main control module, SRAM and FLASH is used for the buffer memory of data and program.Impact damper is used for the buffering between the arm processor and the radio-frequency module of tick-over of high speed operation, realizes the synchronous of data transmission.
Radio-frequency module inside is integrated with power supply, power management module, balance/imbalance transducer, processor, temperature compensating crystal oscillator, power amplifier and fiber coupler.Power supply is connected with power management module, for whole device is powered.What power supply was selected is 5V powered battery, and power management module receives the operating voltage that outside DC input converts other modules to, the 3.3V voltage such as becoming processor to need 5V voltage transitions.Processor, temperature compensating crystal oscillator are all connected by electric wire with power management module with power amplifier.PR900 chip selected by processor, and PR900 inside is integrated with radio-frequency (RF) transceiver, baseband modulation and detuner, single-chip microcomputer, FLASH, SRAM and UART.The control and management of the transmitting-receiving of radiofrequency signal, the modulation /demodulation of data and whole circuit can be completed.PR900 works in high band (840 ~ 960MHz), because PR900 frequency of operation is at high band, and the namely high-frequency signal of reception.Temperature compensating crystal oscillator is also connected with processor, provides clock signal and produce reference signal for processor processes data.
Processor is communicated with balance/imbalance transducer by TX sending module, balance/imbalance transducer is communicated with power amplifier by TX sending module, and signal amplifies and by TX sending module, signal sent to fiber coupler by power amplifier.Processor by the power transimission that emits in balance/imbalance transducer, convert balanced signal to unbalanced signal through the conversion of balance/imbalance transducer to export, the impedance magnitude of balance end dress is changed into equal with the impedance magnitude of defeated reflex path simultaneously.The signal exported from processor is general more weak, needs to be amplified by signal through power amplifier, thus can improve the communication distance of radio-frequency module and electronic tag.Fiber coupler also can be connected with antenna, the signal that receiving antenna transmits.The power signal passed in power amplifier is transferred to the positive receiving end of PR900 after fiber coupler process decay, and the power signal passed over from antenna is natively very faint, is transferred to the negative receiving end of PR900 through fiber coupler.These two power signals being delivered to PR900 partner differential signal.
Certain above-mentioned explanation is not limitation of the utility model; the utility model is also not limited only to above-mentioned citing; the change that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also belong to protection domain of the present utility model.
Claims (5)
1. a high band rfid interrogator module, comprises main control module, radio-frequency module and Anneta module, it is characterized in that: main control module is connected with radio-frequency module; Control inside modules is integrated with arm processor, CPLD, SRAM, FLASH and impact damper; CPLD is connected with FLASH with impact damper, dsp processor; SRAM, FLASH and impact damper are all connected on arm processor; Arm processor also can be connected with upper main frame; Radio-frequency module inside is integrated with power supply, power management module, balance/imbalance transducer, processor, temperature compensating crystal oscillator, power amplifier and fiber coupler; Power supply is connected with power management module; Processor, temperature compensating crystal oscillator are all connected by electric wire with power management module with power amplifier, and PR900 chip selected by processor; Temperature compensating crystal oscillator is also connected with processor; Processor is communicated with balance/imbalance transducer by TX sending module, balance/imbalance transducer is communicated with power amplifier by TX sending module, and signal amplifies and by TX sending module, signal sent to fiber coupler by power amplifier; Radio-frequency module is connected by fiber coupler with antenna, and the signal attenuation that power amplifier sends over by fiber coupler sends to PR900, antenna is passed the signal of coming and sends PR900 to; The signal that PR900 is sent by RX receiver module reception fiber coupler.
2. a kind of high band rfid interrogator module according to claim 1, is characterized in that: the arm processor in described main control module is connected with the PR900 chip on radio-frequency module.
3. a kind of high band rfid interrogator module according to claim 1, is characterized in that: described arm processor is also communicated by impact damper with radio-frequency module.
4. a kind of high band rfid interrogator module according to claim 1, is characterized in that: described temperature compensating crystal oscillator selects frequency to be the DSA321SCA temperature complement voltage-control crystal resonator of 19.2MHZ.
5. a kind of high band rfid interrogator module according to claim 1, is characterized in that: described temperature compensating crystal oscillator is connected by frequency multiplier circuit with PR900.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520158110.0U CN204463180U (en) | 2015-03-16 | 2015-03-16 | A kind of high band rfid interrogator module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520158110.0U CN204463180U (en) | 2015-03-16 | 2015-03-16 | A kind of high band rfid interrogator module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204463180U true CN204463180U (en) | 2015-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520158110.0U Expired - Fee Related CN204463180U (en) | 2015-03-16 | 2015-03-16 | A kind of high band rfid interrogator module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204463180U (en) |
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2015
- 2015-03-16 CN CN201520158110.0U patent/CN204463180U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20170316 |