CN201828950U

CN201828950U - Passive radio-frequency label with acceleration transducer

Info

Publication number: CN201828950U
Application number: CN201020557489XU
Authority: CN
Inventors: 陈积明; 江发昌; 程鹏; 贺诗波; 孙优贤
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2010-10-12
Filing date: 2010-10-12
Publication date: 2011-05-11
Anticipated expiration: 2020-10-12

Abstract

The utility model discloses a passive radio-frequency label with an acceleration transducer, comprising a radio-frequency front end and an MCU (Mmicroprogrammed Ccontrol Uunit), wherein the radio-frequency front end mainly comprises a PCB (printed circuit board) antenna, a rectification module, an energy storage module, a voltage stabilizing module, a demodulating module, and a modulating module; the MCU consists of a microprocessor module, an LED (light-emitting diode) module, an EEPROM (electrically erasable programmable read-only memory), a Vout monitoring module and an acceleration module; the PCB antenna and the demodulating module are respectively connected with the rectification module; the voltage stabilizing module is connected with the energy storage module; the PCB antenna is connected with the modulating module; and the voltage stabilizing module, the demodulating module, the modulating module, the LED module, the EEPROM, the Vout monitoring module and the acceleration module are respectively connected with the microprocessor module. The passive radio-frequency label can return ID information of a carrier to a reader-writer, and can obtain the movement state of the carrier through a collecting acceleration sensor so as to realize better monitoring on patients.

Description

A kind of passive RF label with acceleration transducer

Technical field

The utility model relates to a kind of label apparatus that carries out contactless identification by radiofrequency signal, relates in particular to a kind of electronic tag with acceleration device that can perception carrier motion conditions.

Background technology

Along with the development of special integrated chip and wireless communication technique, the RFID technology that possesses contactless recognition capability relies on characteristics such as it is simple, cheap to obtain application widely.Often can see the RFID technology in occasions such as logistic track, the patient of hospital monitoring.Yet at present the label in the rfid system all is made of special integrated chip, storage information all be simple id information.Need monitor the situation of carrier's motion simultaneously for some, as patient's motion, the id information that common label provides obviously is nowhere near.

The utility model content

Provide quantity of information simple defective in order to overcome existing label, especially can not monitor the deficiency of carrier's motion conditions, the purpose of this utility model is to provide a kind of passive RF label with acceleration transducer.This label not only can return carrier's id information to read write line, also can be by gathering the moving situation that acceleration transducer obtains the carrier, to realize better patient's monitoring.

The technical scheme that its technical matters that solves the utility model adopts: a kind of passive RF label with acceleration transducer, this label mainly comprises two parts: radio-frequency front-end and MCU control.Wherein, described radio-frequency front-end mainly is made up of PCB antenna, rectification module, energy-storage module, Voltage stabilizing module, demodulation module, modulation module; Described MCU control section comprises microprocessor module, led module, EEPROM, Vout monitoring modular and acceleration device module.The PCB antenna links to each other with rectification module respectively with demodulation module, and Voltage stabilizing module links to each other with energy-storage module, and the PCB antenna links to each other with modulation module; Voltage stabilizing module, demodulation module, modulation module, led module, EEPROM, Vout monitoring modular and acceleration device module link to each other with microprocessor module respectively.

Further, described microprocessor module is made up of microcontroller U0, crystal oscillator Y1, connector P1～P2; The Vout monitoring modular is made up of voltage-level detector U6 and level transferring chip U7; Led module is made up of LED 1～LED3, resistance R 4～R6, field effect transistor Q2～Q4; EEPROM is made up of memory chip U5, capacitor C 21, resistance R 2 and resistance R 3; Acceleration device module is made up of acceleration device U4 and capacitor C 17～C20.

The beneficial effect that the utlity model has is:

1) introducing of acceleration device has remedied the single defective of conventional labels quantity of information, and the passive RF label with acceleration transducer not only can provide label carrier's id information, can also monitor carrier's motion conditions by the data of gathering the acceleration device.

2) the utility model combines RFID technology and sensor technology, by sensor technology has been joined among the RFID, makes that the RFID technology is more intelligent, also provides a kind of new approach for the RFID development in future.

3) rectification, demodulation, the modulation module built of the utility model realized the function of specific RFID integrated chip in the conventional labels, and this new implementation has greater flexibility than traditional integrated chip, is convenient to very much expansion.

Description of drawings

Fig. 1 is an one-piece construction block diagram of the present utility model;

Fig. 2 is a program flow diagram of the present utility model;

Fig. 3 is an analog front circuit schematic diagram of the present utility model;

Fig. 4 is a MCU control circuit schematic diagram of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is described further.

As shown in Figure 1, the one-piece construction of having described this New-type label is formed: AFE (analog front end) of the first half and the MCU of the latter half control.AFE (analog front end) is made up of PCB antenna, rectification module, energy-storage module, Voltage stabilizing module, demodulation module, modulation module.This part is finished conversion and storage, the decoding of read write line order and the coding of tag responses data of radiofrequency signal to electric energy.The MCU control section mainly comprises microprocessor module, led module, EEPROM, Vout monitoring modular, acceleration device module, and this part is finished to the control of whole label and to the collection of acceleration transducer parameter.The energy of whole label is provided by the storage capacitor in the RF front-end module.

The course of work of this label has been described as shown in Figure 2.The querying command of label response Reader is gathered the acceleration transducer data, returns to Reader then, and label entered low-power consumption mode to reduce energy consumption after communication was finished.

As shown in Figure 3, be the analog front circuit schematic diagram of label.The PCB antenna mainly is made up of antenna Antenna, variable capacitance CV, inductance L 1, wherein the collector of field effect transistor Q1 is connected in an end of the end of the end of antenna Antenna and variable capacitance CV, inductance L 1, the modulation module, the other end of variable capacitance CV is connected with ground, and the end of capacitor C 1, C3, C5, C7, C9, C11, C13 is connected in the other end of inductance L 1 and the rectification module.Rectification module mainly is made of capacitor C 1～C14 and detection tube D1～D7, wherein detection tube D1～D7 can select the zero offset Schottky detection tube HSMS-285 of Agilent company for use, detection tube D1, D2, D3, D4, D5, D6,3 pin of D7 respectively with capacitor C 1, C3, C5, C7, C9, C11, the end of C13 connects, 1 pin of detection tube D1 is connected with ground, 2 pin of detection tube D1 and 1 pin of detection tube D2, one end of capacitor C 2 connects, 2 pin of detection tube D2 and 1 pin of detection tube D3, one end of capacitor C 4 connects, 2 pin of detection tube D3 and 1 pin of detection tube D4, one end of capacitor C 6 connects, 2 pin of detection tube D4 and 1 pin of detection tube D5, one end of capacitor C 8 connects, 2 pin of detection tube D5 and 1 pin of detection tube D6, one end of capacitor C 10 connects, 2 pin of detection tube D6 and 1 pin of detection tube D7, one end of capacitor C 12 connects, 2 pin of detection tube D7 and an end of capacitor C 14, the anode of diode D8 in the energy-storage module, the anode of diode D9 in the demodulation module, 4 pin of voltage comparator U2 connect in the demodulation module, capacitor C 2, C4, C6, C8, C10, C12, the other end of C14 is connected with ground.Energy-storage module mainly is made up of diode D8, storage capacitor Cstore, voltage stabilizing diode ED, the terminal voltage of storage capacitor Cstore is Vout, 1 pin of voltage stabilizing chip U1 is connected with 4 pin in the end of the negative terminal of diode D8 and storage capacitor Cstore, 1 pin of voltage stabilizing diode ED, the Voltage stabilizing module, the other end of storage capacitor Cstore is connected with ground, and 2 pin of voltage stabilizing diode ED are connected with ground.Voltage stabilizing module is mainly by voltage stabilizing chip U1, capacitor C 15 is formed, wherein voltage stabilizing chip U1 can select the voltage stabilizer NCP583SQ18 of ON Semiconductor company for use, the 3 pin output Vreg of voltage stabilizing chip U1,2 pin of voltage stabilizing chip U1 are connected with ground, 3 pin of voltage stabilizing chip U1 and an end of capacitor C 15,6 pin of level transferring chip U3 in the demodulation module, 38 of microcontroller U0 and 39 pin among Fig. 4, an end of resistance R 0 among Fig. 4,1 pin of connector P1 among Fig. 4,2 pin of connector P2 among Fig. 4,6 pin of level transferring chip U7 among Fig. 4, an end of resistance R 2 among Fig. 4, an end of resistance R 3 among Fig. 4, one end of the capacitor C 21 among Fig. 4,4 pin of memory chip U5 among Fig. 4, the other end of capacitor C 15 is connected with ground.Demodulation module is mainly by diode D9, capacitor C 16, voltage comparator U2, field effect transistor Q2, level transferring chip U3 forms, an end of the negative terminal of diode D9 and capacitor C 16 wherein, 3 pin of voltage comparator U2,5 pin of voltage comparator U2,1 pin of level transferring chip U3 connects, the other end of capacitor C 16 is connected with ground, 2 pin of voltage comparator U2 are connected with 3 pin of field effect transistor Q2,1 pin of voltage comparator U2 is connected with 2 pin of level transferring chip U3,2 pin of field effect transistor Q2 are connected with ground, 1 pin of field effect transistor Q2 is connected with 30 pin of microcontroller U0 among Fig. 4,3 pin of level transferring chip U3 are connected with ground, 4 pin of level transferring chip U3 are connected with ground, and 5 pin of level transferring chip U3 are connected with 31 pin of microcontroller U0 among Fig. 4.Modulation module mainly is made up of field effect transistor Q1, resistance R 1, wherein an end of resistance R 1 is connected with 32 pin of microcontroller U0 among Fig. 4, the other end of resistance R 1 is connected with the base stage of field effect transistor Q1, the collector of field effect transistor Q1 is connected with the end of antenna Antenna, variable capacitance CV, an end of inductance L 1, and the emitter of field effect transistor Q1 is connected with ground.

The connection situation of MCU control circuit schematic diagram has been described as shown in Figure 4.Microprocessor module is mainly by microcontroller U0, crystal oscillator Y1, resistance R 0, connector P1, connector P2 forms, wherein microcontroller can be selected the MSP430F2274 of TI company for use, 1 of microcontroller U0,4,13 pin are connected with ground, 2 pin of microcontroller U0 are connected with 1 pin of crystal oscillator Y1,3 pin of microcontroller U0 are connected with 2 pin of crystal oscillator Y1,5 pin of microcontroller U0 are connected with an end of resistance R 0, the other end of resistance R 0 is connected with 3 pin of voltage stabilizing chip U1 among Fig. 3,6 of microcontroller U0,7,8 pin respectively with 12 of acceleration transducer U4,10,8 pin, 5 of connector P2,6,7 pin, capacitor C 18, C19, the end of C20 connects, 9 pin of microcontroller U0 and 13～16 pins of acceleration transducer U4, one end of capacitor C 17 connects, 10 pin of microcontroller U0 and 3 pin of memory chip U5, one end of resistance R 2 connects, 11 pin of microcontroller U0 and 1 pin of memory chip U5, one end of resistance R 3 connects, 20 of microcontroller U0,21,22 pin respectively with field effect transistor Q4, Q3,1 pin of Q2 connects, 29 pin of microcontroller U0 and 5 pin of level transferring chip U7,4 pin of connector P2 connect, 33 pin of microcontroller U0 are connected with 8 pin of connector P2,37 pin of microcontroller U0 are connected with 2 pin of connector P1,4 pin of connector P1 are connected with ground, and 3 pin of connector P2 are connected with ground.Led module mainly is made up of LED 1～LED3, resistance R 4～R6, field effect transistor Q2～Q4, wherein the anode of LED 1, LED2, LED3 is connected with the terminal voltage Vout of storage capacitor, the negative terminal of LED 1, LED2, LED3 is connected with the end of resistance R 4, R5, R6 respectively, the other end of resistance R 4, R5, R6 is connected with 3 pin of field effect transistor Q2, Q3, Q4 respectively, and 2 pin of field effect transistor Q2, Q3, Q4 are connected with ground.EEPROM mainly is made up of memory chip U5, resistance R 2, resistance R 3, capacitor C 21, wherein 1 pin of memory chip U5 is connected with an end of

resistance R

3,11 pin of microcontroller U0,2 pin of memory chip U5 are connected with ground, 3 pin of memory chip U5 are connected with 10 pin of resistance R 2, microcontroller U0,4 pin of memory chip U5 are connected with the output Vreg of an end of capacitor C 21, voltage stabilizing chip U1,5 pin of memory chip U5 and an end of capacitor C 21, be connected, the other end of resistance R 2, R3 is connected with the output Vreg of voltage stabilizing chip U1.The Vout monitoring modular is mainly by voltage-level detector U6, level transferring chip U7 forms, wherein 2 of voltage-level detector U6,3 pin are connected with the terminal voltage Vout of storage capacitor, 4 pin of voltage-level detector U6 are connected with ground, 1 pin of voltage-level detector U6 is connected with 2 pin of level transferring chip U7,1 pin of level transferring chip U7 is connected with the terminal voltage Vout of storage capacitor, 3 of level transferring chip U7,4 pin are connected with ground, 5 pin of level transferring chip U7 and 29 pin of microcontroller U0,4 pin of connector P2 connect, and 6 pin of level transferring chip U7 are connected with the output Vreg of voltage stabilizing chip U1.Acceleration device module mainly is made up of acceleration transducer U4, capacitor C 17～C20, wherein acceleration transducer can be selected the ADXL330 of Analog Devices company for use, 1～7,11 pin of acceleration transducer U4 are connected with ground, 8,10,12 pin of acceleration transducer U4 are connected with 8,7,6 pin of the end of capacitor C 20, C19, C18, microcontroller U0,13～16 pin of acceleration device U4 are connected with 9 pin of an end of capacitor C 17, microcontroller U0, the other end of capacitor C 17 is connected with ground, and the other end of capacitor C 17～20 is connected with ground.

The foregoing description is used for the utility model of explaining; rather than the utility model limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.

Claims

1. the passive RF label with acceleration device is characterized in that, this label mainly comprises two parts: radio-frequency front-end and MCU control; Wherein, described radio-frequency front-end mainly is made up of PCB antenna, rectification module, energy-storage module, Voltage stabilizing module, demodulation module, modulation module; Described MCU control section comprises microprocessor module, led module, EEPROM, Vout monitoring modular and acceleration device module; The PCB antenna links to each other with rectification module respectively with demodulation module, and Voltage stabilizing module links to each other with energy-storage module, and the PCB antenna links to each other with modulation module; Voltage stabilizing module, demodulation module, modulation module, led module, EEPROM, Vout monitoring modular and acceleration device module link to each other with microprocessor module respectively.