CN202694397U

CN202694397U - Radio frequency identification (RFID) label with mechanical shift detection device and RFID system

Info

Publication number: CN202694397U
Application number: CN 201220259476
Authority: CN
Inventors: 王玉泉; 霍灵瑜; 刘丙午
Original assignee: Beijing Wuzi University
Current assignee: Beijing Wuzi University
Priority date: 2012-06-01
Filing date: 2012-06-01
Publication date: 2013-01-23
Anticipated expiration: 2022-06-01

Abstract

The utility model provides a radio frequency identification (RFID) label with a mechanical shift detection device and an RFID system. The mechanical shift detection device and an antenna of the RFID label form a parallel connection structure, and a logical circuit used for controlling connection and disconnection and a voltage-resistance conversion device are arranged on a line for connecting the mechanical shift detection device and a chip of the RFID label; when the logical circuit is disconnected, the mechanical shift detection device is not in the parallel connection with the antenna, at the moment, the mechanical shift detection device is placed on a moving object, and a first resonant frequency and signal intensity t of the antenna are not changed; when the logical circuit is connected, the mechanical shift detection device is in the parallel connection with the antenna, at the moment, the mechanical shift detection device is placed on the moving object, at least one of a characteristic frequency and the signal intensity of the antenna is changed, and the antenna is operated under a second resonant frequency at the moment; and the RFID label receives an instruction transmitted by an RFID reader so as to control the connection and disconnection of the logical circuit, and thereby the change of mechanical shift is detected by comparing differences of signal intensity in different frequencies of the antenna. The RFID label with the mechanical shift detection device and the RFID system have the advantage that the change of the mechanical shift can be detected with a low cost.

Description

A kind of RFID label, rfid system with the mechanical shift pick-up unit

Technical field

The utility model relates to RFID (Radio Frequency Identification, radio-frequency (RF) identification) technical field, relates in particular to a kind of RFID label, rfid system with the mechanical shift pick-up unit.

Background technology

In recent years, rfid system had become more prevalent.Rfid system is mainly used in the identification to people and thing.In general, this system comprises a RFID reader at least, and this RFID reader can transmit and receive the radiofrequency signal from one or more RFID labels in the scope of a setting.This RFID label generally is encapsulated, and can be attached on the object, and it comprises the microchip that an energy and antenna carry out information interchange.This microchip is an integrated circuit in general, and it can be used for storing and process information, the modulation /demodulation radiofrequency signal, and can move other specific function.The antenna of RFID label is to receive and the transmission radiofrequency signal, and usually is applicable to a kind of special frequency.

In some equipment, when the mechanical shift that has been used to monitor product environment of living in the rfid system of mechanical shift pick-up unit has surpassed the acceptable mechanical shift.In general these equipment requirement induction installations will have a lasting energy source, are used for detecting the change of mechanical shift, but this can increase the cost of equipment.In addition, some equipment requirement induction installations also will link to each other with a comparator circuit, thereby detect the degree size that departs from reference voltage, and this requirement has increased the cost of equipment greatly.In a word, improve rfid system and be necessary, it requires to be used for detecting mechanical shift when not using lasting energy source or using a kind of cheaply adjunct circuit and changes.

The utility model content

The utility model embodiment provides a kind of RFID label, rfid system with the mechanical shift pick-up unit, detects at lower cost mechanical shift and changes.

On the one hand, the utility model embodiment provides a kind of RFID label with the mechanical shift pick-up unit, and two pins are arranged on the chip of described RFID label; Two pins of described mechanical shift pick-up unit and this link to each other, and form parallel-connection structure with the antenna of described RFID label, the variation of extraneous mechanical shift can cause the variation of mechanical shift pick-up unit both end voltage or electric current, the circuit that is connected with the chip of RFID label at described mechanical shift pick-up unit has logical circuit and a voltage-resistance conversion equipment of controlling break-make, the circuit of this connection, this logical circuit and this voltage-resistance conversion equipment are the parts of chip, voltage-resistance conversion equipment is used for the variation of mechanical shift pick-up unit both end voltage or electric current is converted to the variation of resistance, the break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit disconnects, the mechanical shift pick-up unit not with the sky line parallel, be placed on the mobile object this moment, and the first resonant frequency and the signal intensity of antenna remain unchanged; When logical circuit was connected, the mechanical shift pick-up unit was placed on the mobile object with a day line parallel, this moment, and the characteristic frequency of antenna and signal intensity have at least one and change, and this moment, antenna was operated under the second resonant frequency; Described RFID label receives the instruction of RFID reader transmission with the break-make of control logic circuit, thereby realizes detecting from the difference between the signal intensity of the different frequency of antenna by comparison the change of mechanical shift.

Optionally, in the utility model one embodiment, the antenna of described RFID label is monopole antenna.

Optionally, in the utility model one embodiment, the antenna of described RFID label is double-doublet antenna: described mechanical shift pick-up unit and the voltage that links to each other with this mechanical shift pick-up unit-resistance conversion equipment form parallel-connection structure with antenna wherein; Perhaps described mechanical shift pick-up unit forms parallel-connection structure simultaneously with the voltage that links to each other with this mechanical shift pick-up unit-resistance conversion equipment and two antennas.

Optionally, in the utility model one embodiment, described voltage-resistance conversion equipment comprises: a variable voltage converts variable-resistance device to, an or ditch type field effect transistor, or the equivalent electrical circuit of field effect transistor, described mechanical shift pick-up unit comprises: the resistance-strain type displacement detector, electro-induction formula displacement detector, the space-changeable type inductance displacement passes pick-up unit, helix tube type inductance displacement pick-up unit, differential helix tube type inductance displacement pick-up unit, the differential transformation sensor of helix tube type, the reflection type photoelectricity displacement detector, the reflection type optical fiber displacement detector, the optical grating bit shift detection device, the magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, the linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit.

On the other hand, the utility model embodiment provides a kind of RFID label with the mechanical shift pick-up unit, and a pin is arranged on the chip of described RFID label; One end of described mechanical shift pick-up unit links to each other with this pin, the other end is connected on the antenna of described RFID label, and form parallel-connection structure with antenna, the variation of extraneous mechanical shift can cause the variation of mechanical shift pick-up unit both end voltage or electric current, the circuit that is connected with the chip of RFID label at described mechanical shift pick-up unit has logical circuit and a voltage-resistance conversion equipment of controlling break-make, the circuit of this connection, this logical circuit and this voltage-resistance conversion equipment are the parts of chip, voltage-resistance conversion equipment is used for the variation of mechanical shift pick-up unit both end voltage or electric current is converted to the variation of resistance, the break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit disconnects, the mechanical shift pick-up unit not with the sky line parallel, be placed on the mobile object this moment, and the first resonant frequency and the signal intensity of antenna remain unchanged; When logical circuit was connected, the mechanical shift pick-up unit was placed on the mobile object with a day line parallel, this moment, and the characteristic frequency of antenna and signal intensity have at least one and change, and this moment, antenna was operated under the second resonant frequency; Described RFID label receives the instruction of RFID reader transmission with the break-make of control logic circuit, thereby realizes detecting from the difference between the signal intensity of the different frequency of antenna by comparison the change of mechanical shift.

Another aspect, the utility model embodiment provides a kind of RFID label with the mechanical shift pick-up unit, described mechanical shift pick-up unit is connected on the antenna of described RFID label, and form parallel-connection structure with antenna, the variation of extraneous mechanical shift can cause the variation of mechanical shift pick-up unit both end voltage or electric current, the circuit that is connected with antenna at described mechanical shift pick-up unit has logical circuit and a voltage-resistance conversion equipment of controlling break-make, the circuit of this connection, this logical circuit and this voltage-resistance conversion equipment are the parts of chip, voltage-resistance conversion equipment is used for the variation of mechanical shift pick-up unit both end voltage or electric current is converted to the variation of resistance, the break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit disconnects, the mechanical shift pick-up unit not with the sky line parallel, be placed on the mobile object this moment, and the first resonant frequency and the signal intensity of antenna remain unchanged; When logical circuit was connected, the mechanical shift pick-up unit was placed on the mobile object with a day line parallel, this moment, and the characteristic frequency of antenna and signal intensity have at least one and change, and this moment, antenna was operated under the second resonant frequency; Described RFID label receives the instruction of RFID reader transmission with the break-make of control logic circuit, thereby realizes detecting from the difference between the signal intensity of the different frequency of antenna by comparison the change of mechanical shift.

On the one hand, the utility model embodiment provides a kind of rfid system with the mechanical shift pick-up unit again, and described rfid system comprises RFID label and RFID reader, and described RFID label comprises above-mentioned RFID label with the mechanical shift pick-up unit; Described RFID reader sends instruction with the break-make of the logical circuit of control RFID label, thereby detects the change of mechanical shift from the difference between the signal intensity of the different frequency of antenna by comparison.

Technique scheme has following beneficial effect: because adopt a kind of RFID label with the mechanical shift pick-up unit, the antenna of described mechanical shift pick-up unit and described RFID label forms parallel-connection structure, the variation of extraneous mechanical shift can cause the variation of mechanical shift pick-up unit both end voltage or electric current, the circuit that is connected with the chip of RFID label at described mechanical shift pick-up unit has logical circuit and a voltage-resistance conversion equipment of controlling break-make, the circuit of this connection, this logical circuit and this voltage-resistance conversion equipment are the parts of chip, voltage-resistance conversion equipment is used for the variation of mechanical shift pick-up unit both end voltage or electric current is converted to the variation of resistance, the break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit disconnects, the mechanical shift pick-up unit not with the sky line parallel, be placed on the mobile object this moment, and the first resonant frequency and the signal intensity of antenna remain unchanged; When logical circuit was connected, the mechanical shift pick-up unit was placed on the mobile object with a day line parallel, this moment, and the characteristic frequency of antenna and signal intensity have at least one and change, and this moment, antenna was operated under the second resonant frequency; Described RFID label receives the instruction of RFID reader transmission with the break-make of control logic circuit, thereby realize detecting from the difference between the signal intensity of the different frequency of antenna by comparison the technological means of the change of mechanical shift, can detect at lower cost the technique effect that mechanical shift changes so reached, and the energy that utilizes RFID to obtain, solved the powerup issue that mechanical shift detects.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the schematic diagram that the utility model embodiment mechanical shift pick-up unit is connected with the RFID label chip;

Fig. 2 is the equivalent circuit diagram of RFID label chip inside antenna;

Fig. 3 is the schematic diagram that the utility model embodiment mechanical shift pick-up unit, logic switch and voltage-resistance conversion equipment are connected with RFID label chip inside antenna equivalent electrical circuit;

Fig. 4 schematic diagram that to be the utility model embodiment mechanical shift pick-up unit directly be connected with the RFID label antenna;

Fig. 5 is the structure key diagram of the utility model embodiment mechanical shift pick-up unit;

Fig. 6 is that the utility model embodiment is based on the process flow diagram of the mechanical shift detection method of signal intensity.

Embodiment

Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.

The mechanical shift pick-up unit of the utility model embodiment links to each other with the chip of RFID label and has at least three kinds of situations:

The two pins structure:

The utility model is a kind of device, system and technology that mechanical shift changes that be used for detecting.This system has comprised a label, and two pins are arranged on the chip of this label.Two pins of mechanical shift pick-up unit and this link to each other, and form parallel-connection structure with antenna.The variation of extraneous mechanical shift can cause the variation of mechanical shift pick-up unit both end voltage or electric current.The circuit that is connected with chip at pin has logical circuit and a voltage-resistance conversion equipment of controlling break-make, and logical circuit and the voltage-resistance conversion equipment of the circuit of this connection, control break-make are the parts of chip.The effect of voltage-resistance conversion equipment is the variation that the variation of mechanical shift pick-up unit both end voltage or electric current is converted to resistance.The break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel.When logical circuit disconnects, the mechanical shift pick-up unit not with the sky line parallel.This moment, the mechanical shift pick-up unit was placed on the mobile object, and the first resonant frequency and the signal intensity of antenna remain unchanged.When logical circuit was connected, the mechanical shift pick-up unit was placed on the mobile object with a day line parallel, this moment, and the characteristic frequency of antenna and signal intensity have at least one and change, and this moment, antenna was operated under the second resonant frequency.Reader can send the break-make of instruction control logic circuit to label, when logical circuit is connected, can detect by comparison the change of mechanical shift from the difference between the signal intensity of the different frequency of antenna.

With regard to an example, this system has comprised a label, only has an antenna (monopole antenna) on this label.Two pins are arranged on the chip of this label.Two pins of mechanical shift pick-up unit and this link to each other, and form parallel-connection structure with antenna.The circuit that is connected with chip at pin has logical circuit and a voltage-resistance conversion equipment of controlling break-make, and logical circuit and the voltage-resistance conversion equipment of the circuit of this connection, control break-make are the parts of chip.The effect of voltage-resistance conversion equipment is the variation that the variation of mechanical shift pick-up unit both end voltage or electric current is converted to resistance.The machinery displacement detector is placed on the mobile object when logical circuit is connected, and antenna features frequency and signal intensity have at least one and change, and it is operated under the second resonant frequency.Reader can send instruction to label, and the difference between the signal intensity of the different frequency during by the Compare Logic connecting and disconnecting of the circuit can detect the change of mechanical shift.Or rather, voltage-resistance conversion equipment can be an equivalent electrical circuit that variable voltage is converted to variable-resistance device, ditch type field effect transistor or field effect transistor.And the instantiation of mechanical shift pick-up unit comprises: the resistance-strain type displacement detector, electro-induction formula displacement detector, the space-changeable type inductance displacement passes pick-up unit, helix tube type inductance displacement pick-up unit, differential helix tube type inductance displacement pick-up unit, the differential transformation sensor of helix tube type, the reflection type photoelectricity displacement detector, the reflection type optical fiber displacement detector, the optical grating bit shift detection device, the magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, the linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit etc.

With regard to another example, this system has comprised a label, and two antennas (double-doublet antenna) are arranged on this label.Two kinds of situations are arranged this moment.The first situation is that two pins of mechanical shift pick-up unit and this link to each other, and forms parallel-connection structure with first antenna.The circuit that is connected with chip at pin has logical circuit and a voltage-resistance conversion equipment of controlling break-make, and logical circuit and the voltage-resistance conversion equipment of the circuit of this connection, control break-make are the parts of chip.The effect of voltage-resistance conversion equipment is the variation that the variation of mechanical shift pick-up unit both end voltage or electric current is converted to resistance.The voltage-resistance conversion equipment that link to each other with the mechanical shift pick-up unit this moment also with first sky line parallel, and second antenna is all the time with the first resonant frequency proper communication.When logical circuit is connected, be placed on the mobile object, first antenna features frequency and signal intensity have at least a meeting to change, and it is operated under the second resonant frequency.Reader can send instruction to label, and the difference between the signal intensity of the different frequency of first and second antennas can detect the change of mechanical shift when connecting by the Compare Logic circuit.Difference between the signal intensity of the different frequency during logical circuit break-make by second antenna self relatively also can detect the change of mechanical shift.The second situation is that two pins of mechanical shift pick-up unit and this link to each other, and form simultaneously parallel-connection structure with two antennas.The circuit that is connected with chip at pin has logical circuit and a voltage-resistance conversion equipment of controlling break-make, and logical circuit and the voltage-resistance conversion equipment of the circuit of this connection, control break-make are the parts of chip.The effect of voltage-resistance conversion equipment is the variation that the variation of mechanical shift pick-up unit both end voltage or electric current is converted to resistance.The voltage that link to each other with the mechanical shift pick-up unit this moment-resistance conversion equipment is also simultaneously in parallel with these two antennas, and the situation that this and label only contain an antenna is similar.Be placed on the mobile object when logical circuit is connected, antenna features frequency and signal intensity have at least one and change, and it is operated under the second resonant frequency.Reader can send instruction to label, and the difference between the signal intensity of the different frequency during by the Compare Logic connecting and disconnecting of the circuit can detect the change of mechanical shift.The first situation circuit connects fairly simple, and the resonant frequency of two antennas may be different during work, can affect the precision of measurement.The second situation circuit connects more complicated, but the resonant frequency of two antennas is consistent during work, and measuring accuracy is higher.Or rather, voltage-resistance conversion equipment can be an equivalent electrical circuit that variable voltage is converted to variable-resistance device, ditch type field effect transistor or field effect transistor.And the instantiation of mechanical shift pick-up unit comprises: the resistance-strain type displacement detector, electro-induction formula displacement detector, the space-changeable type inductance displacement passes pick-up unit, helix tube type inductance displacement pick-up unit, differential helix tube type inductance displacement pick-up unit, the differential transformation sensor of helix tube type, the reflection type photoelectricity displacement detector, the reflection type optical fiber displacement detector, the optical grating bit shift detection device, the magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, the linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit etc.

One pin configuration:

The chip of this label can only have a pin, and this pin outwards links to each other with an end of mechanical shift pick-up unit, and the other end of mechanical shift pick-up unit is directly linked on the antenna.Pin is similar in the situation of the tie point of chip internal and two pins, finally remains the purpose that will reach with the sky line parallel.The circuit that is connected with the chip internal circuit at pin simultaneously has the logical circuit of a control break-make.In addition, voltage-resistance conversion equipment in parallel again on the circuit of antenna, voltage-resistance conversion equipment have again circuit and mechanical shift pick-up unit to be connected two-termial line with logical circuit to be connected.When logical circuit disconnects, the mechanical shift pick-up unit not with the sky line parallel, this moment be placed on the mobile object, the first resonant frequency and the signal intensity of antenna remain unchanged.When logical circuit was connected, the mechanical shift pick-up unit was placed on the mobile object with a day line parallel, this moment, and antenna features frequency and signal intensity have at least one and change, and it is operated under the second resonant frequency.Reader can send the break-make of instruction control logic circuit to label, when logical circuit is connected, can detect by comparison the change of mechanical shift from the difference between the signal intensity of the different frequency of antenna.

With regard to an example, this system has comprised a label, only has an antenna (monopole antenna) on this label.The mechanical shift pick-up unit links to each other with this pin, and the other end of mechanical shift pick-up unit is directly linked on the antenna, forms parallel-connection structure with this root antenna.The circuit that is connected with chip at pin has logical circuit and a voltage-resistance conversion equipment of controlling break-make, and logical circuit and the voltage-resistance conversion equipment of the circuit of this connection, control break-make are the parts of chip.The effect of voltage-resistance conversion equipment is the variation that the variation of mechanical shift pick-up unit both end voltage or electric current is converted to resistance.Be placed on the mobile object when logical circuit is connected, antenna features frequency and signal intensity have at least one and change, and it is operated under the second resonant frequency.Reader can send instruction to label, and the difference between the signal intensity of the different frequency during by the Compare Logic connecting and disconnecting of the circuit can detect the change of mechanical shift.Or rather, voltage-resistance conversion equipment can be an equivalent electrical circuit that variable voltage is converted to variable-resistance device, ditch type field effect transistor or field effect transistor.And the instantiation of mechanical shift pick-up unit comprises: the resistance-strain type displacement detector, electro-induction formula displacement detector, the space-changeable type inductance displacement passes pick-up unit, helix tube type inductance displacement pick-up unit, differential helix tube type inductance displacement pick-up unit, the differential transformation sensor of helix tube type, the reflection type photoelectricity displacement detector, the reflection type optical fiber displacement detector, the optical grating bit shift detection device, the magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, the linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit etc.

With regard to another example, this system has comprised a label, and two antennas (double-doublet antenna) are arranged on this label.The mechanical shift pick-up unit with this one by one pin link to each other, the other end of mechanical shift pick-up unit is directly linked on the antenna, forms parallel-connection structure with first antenna.The circuit that is connected with chip at pin has logical circuit and a voltage-resistance conversion equipment of controlling break-make, and logical circuit and the voltage-resistance conversion equipment of the circuit of this connection, control break-make are the parts of chip.The effect of voltage-resistance conversion equipment is the variation that the variation of mechanical shift pick-up unit both end voltage or electric current is converted to resistance.The voltage-resistance conversion equipment that link to each other with the mechanical shift pick-up unit this moment also with first sky line parallel, and second antenna is all the time with the first resonant frequency proper communication.When logical circuit is connected, be placed on the mobile object, first antenna is operated under the second resonant frequency, and its characteristic frequency and signal intensity have at least a meeting to change.Reader can send instruction to label, and when connecting by the Compare Logic circuit, the difference between the signal intensity of the different frequency of first and second antennas can detect the change of mechanical shift.Difference between the signal intensity of the different frequency during logical circuit break-make by first antenna self relatively also can detect the change of mechanical shift.Or rather, voltage-resistance conversion equipment can be an equivalent electrical circuit that variable voltage is converted to variable-resistance device, ditch type field effect transistor or field effect transistor.And the instantiation of mechanical shift pick-up unit comprises: the resistance-strain type displacement detector, electro-induction formula displacement detector, the space-changeable type inductance displacement passes pick-up unit, helix tube type inductance displacement pick-up unit, differential helix tube type inductance displacement pick-up unit, the differential transformation sensor of helix tube type, the reflection type photoelectricity displacement detector, the reflection type optical fiber displacement detector, the optical grating bit shift detection device, the magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, the linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit etc.

Without pin configuration:

When not having pin on the chip of RFID label, the mechanical shift pick-up unit can directly be linked on the antenna.Mechanical shift pick-up unit and antenna form parallel-connection structure.The circuit that is connected with chip at antenna has logical circuit and a voltage-resistance conversion equipment of controlling break-make, and logical circuit and the voltage-resistance conversion equipment of the circuit of this connection, control break-make are the parts of chip.The effect of voltage-resistance conversion equipment is the variation that the variation of mechanical shift pick-up unit both end voltage or electric current is converted to resistance.In this case, the antenna that links to each other with the mechanical shift pick-up unit can not break away from mechanical displacement detector and communicate by letter with the first resonant frequency.When being placed on the mobile object, the second resonant frequency of antenna and signal intensity have at least one and change.Reader can send instruction to label apparatus, detects the change of mechanical shift from the difference between the signal intensity of the different frequency of antenna by comparison.

With regard to an example, this system has comprised a label, and two antennas (double-doublet antenna) are arranged on this label.The mechanical shift pick-up unit directly links to each other with first antenna.Mechanical shift pick-up unit and antenna form parallel-connection structure.The circuit that is connected with chip at antenna has logical circuit and a voltage-resistance conversion equipment of controlling break-make, and logical circuit and the voltage-resistance conversion equipment of the circuit of this connection, control break-make are the parts of chip.The effect of voltage-resistance conversion equipment is the variation that the variation of mechanical shift pick-up unit both end voltage or electric current is converted to resistance.And second antenna do not link to each other with the mechanical shift pick-up unit all the time with the first resonant frequency proper communication.When being placed on the mobile object, first antenna features frequency and signal intensity have at least a meeting to change, and it is operated under the second resonant frequency, and the characteristic frequency of second antenna and signal intensity are constant.Reader can send instruction to label, and can detect the change of mechanical shift by the difference between the signal intensity of the different frequency of first and second antennas relatively.Or rather, voltage-resistance conversion equipment can be an equivalent electrical circuit that variable voltage is converted to variable-resistance device, ditch type field effect transistor or field effect transistor.And the instantiation of mechanical shift pick-up unit comprises: the resistance-strain type displacement detector, electro-induction formula displacement detector, the space-changeable type inductance displacement passes pick-up unit, helix tube type inductance displacement pick-up unit, differential helix tube type inductance displacement pick-up unit, the differential transformation sensor of helix tube type, the reflection type photoelectricity displacement detector, the reflection type optical fiber displacement detector, the optical grating bit shift detection device, the magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, the linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit etc.

In the same way, can be with on the chip of antenna also and can not be with pin, can be with one also can be with a plurality of pins.The radical of antenna can be one, two or even many.Also can connect accordingly one or more mechanical shift pick-up units, the model of mechanical shift pick-up unit can be the same or different simultaneously.In addition, the voltage that is attached thereto-resistance conversion equipment also can have many variations.With regard to a kind of instantiation of device, when being placed on the mobile object, the resonant frequency of the antenna that links to each other with the mechanical shift pick-up unit and signal intensity have at least a meeting to change.Reader can send instruction to label apparatus, detects the change of mechanical shift from the difference between the signal intensity of the different frequency of antenna by comparison.

With regard to a kind of instantiation of mechanical shift pick-up unit, the method for simultaneous comparison numerical value comprises that the signal strength values with these comparison numerical value and majority compares.These signal strength values belong to different frequencies, and interrelate with the mechanical shift of majority, simultaneously based on the above-mentioned intensity that relatively can detect mechanical shift of mentioning.

Yet with regard to another aspect, a rfid system comprises a RFID label apparatus and a RFID reader device.This RFID label apparatus is used to send two kinds of signals, the signal the when signal when namely above-mentioned logical circuit disconnects and logical circuit are connected, and these two kinds of signals have at least a kind of meeting that the request that is subject to is responded.The RFID reader device is used for the RFID label apparatus is sent a request at least.Reading device is installed is the fiducial value between the signal strength values in order to receive signal strength values when connecting from the logical circuit of label and logical circuit and to disconnect, and these fiducial values are converted into the varying level of mechanical shift.

In an example, the antenna of RFID label links to each other with the mechanical shift pick-up unit, and the logical circuit of a control break-make is arranged at this connection line.Mechanical shift pick-up unit and antenna form parallel-connection structure.The circuit that is connected with chip at antenna has logical circuit and a voltage-resistance conversion equipment of controlling break-make, and logical circuit and the voltage-resistance conversion equipment of the circuit of this connection, control break-make are the parts of chip.The effect of voltage-resistance conversion equipment is the variation that the variation of mechanical shift pick-up unit both end voltage or electric current is converted to resistance.In logical circuit break-make whether two kinds of situations, this antenna has two kinds of corresponding with it different frequencies, i.e. the first resonant frequency and the second resonant frequency.Connect and this label apparatus is placed on the mobile object when logical circuit, owing to the variation of resonant frequency, will produce the intensity level of unlike signal.

In an example, the RFID label apparatus comprises first, second two antennas.Better, first antenna links to each other with voltage-resistance conversion equipment with the mechanical shift pick-up unit, when this label apparatus is placed on the mobile object, because the variation of resonant frequency, will produce the different of secondary signal intensity level and first signal intensity level.

The schematic diagram of the sense mechanical shift label 10 that is connected with the RFID label chip for the utility model embodiment mechanical shift pick-up unit as shown in Figure 1.As shown in Figure 1, label apparatus 10 comprises 13, two

pins

16,17 of 15, one surface-mounted integrated circuits of a base and a double-doublet antenna 11,12.Two

pins

16,17 are arranged on the surface-mounted integrated circuit 13, and these two pins outwards link to each other with mechanical shift pick-up unit 14, and these two pins are in parallel with the equivalent electrical circuit of antenna at chip internal, and the logical circuit of a control break-make is arranged at the circuit that connects.Mechanical shift pick-up unit and antenna form parallel-connection structure.The circuit that is connected with chip at antenna has logical circuit and a voltage-resistance conversion equipment of controlling break-make, and logical circuit and the voltage-resistance conversion equipment of the circuit of this connection, control break-make are the parts of chip.The effect of voltage-resistance conversion equipment is the variation that the variation of mechanical shift pick-up unit both end voltage or electric current is converted to resistance.Can control mechanical displacement detector by the break-make of logical circuit and whether be access in the chip circuit, thereby can affect the frequency of the antenna that links to each other with radio-frequency module.When logical circuit disconnected, label antenna was with the first resonant frequency communication.When logical circuit is connected, be placed on the mobile object, antenna is operated under the second resonant frequency, and its characteristic frequency and signal intensity have at least one and change.

In an example, transmitting

terminal antenna

11,12 is made by one or more different low electrical resistant materials, these materials have higher electric conductivity, copper for example, silver, and aluminium, they and the above-mentioned mechanical shift pick-up unit of mentioning are by two

pins

16,17 and

antenna

11,12 link to each other, when

antenna

11,12 are placed on the mobile object, and the mechanical shift pick-up unit can cause the variation of one or more transmitting terminal generation resonant frequencies.The frequency of the frequency of this variation and reception and transmission is all different.For example, when logical circuit was connected, the mechanical shift pick-up unit was placed on the mobile object, will cause that at least one changes in transmission frequency and the receive frequency.

In another example, the antenna frequencies value of setting at the beginning will be higher than the antenna frequencies when mobile, and then during movement of objects, it will reduce.In another example, the antenna frequencies the when antenna frequencies of setting at the beginning is lower than movement of objects, it will rise during movement of objects.Can be used for such mechanical shift pick-up unit of the present utility model has: the resistance-strain type displacement detector, electro-induction formula displacement detector, the space-changeable type inductance displacement passes pick-up unit, helix tube type inductance displacement pick-up unit, differential helix tube type inductance displacement pick-up unit, the differential transformation sensor of helix tube type, the reflection type photoelectricity displacement detector, the reflection type optical fiber displacement detector, the optical grating bit shift detection device, the magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, the linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit etc.

Type based on the mechanical shift pick-up unit is different, and the mechanical shift that causes changing may be that a specific mechanical shift value also may be a selectively scope of mechanical shift value.The length of time must cause the variation of antenna resonance frequency, and antenna quality also can cause different variations.For example, on the antenna with the type of mechanical shift pick-up unit can affect the length that changes the antenna resonance frequency required time.

As shown in Figure 2, be the equivalent circuit diagram of RFID label antenna.When the tag coil antenna enters in the alternating magnetic field that read write line produces, the interaction between label antenna and the reading and writing device antenna just is similar to transformer.Both coils are equivalent to primary coil and the secondary coil of transformer.The resonant tank that is formed by label antenna comprises coil inductance (L), stray capacitance (Cp) and the shunt capacitance (C2) of label antenna as shown in Figure 2, and its resonance frequency is

C is the equivalent capacity in parallel of Cp and C2 in the formula, and R1, R2 are the equivalent resistance of circuit internal inductance coil and other devices.The carrier frequency that label and read write line two-way communication are used is exactly f.The tag antenna coil profile is very little when requiring, be that area is little, and need certain operating distance, the aerial coil mutual induction amount that RFID label and read write line are asked just obviously can not practical requirement, can be at the inner Ferrite Material with high permeability that inserts of tag antenna coil, with the increase mutual induction amount, thus the little problem of compensating coil xsect.

As shown in Figure 3, be the utility model embodiment mechanical shift pick-up unit, the logical circuit of control break-make and the schematic diagram that voltage-resistance conversion equipment is connected with RFID label antenna equivalent electrical circuit.The resonant tank that is formed by label antenna comprises coil inductance (L), stray capacitance (Cp) and the shunt capacitance (C2) of label antenna as shown in the figure, and its resonance frequency is

Formula C is the equivalent capacity in parallel of Cp and C2, and R1, R2 are the equivalent resistance of circuit internal inductance coil and other devices.M is the variable resistor of representative machinery displacement detector, and S is the logical circuit of control break-make, and R3 is the equivalent resistance of connecting with the mechanical shift pick-up unit, and F is voltage-resistance conversion equipment.When logical circuit disconnects, the mechanical shift pick-up unit not with the sky line parallel, this moment be placed on the mobile object, the first resonant frequency and the signal intensity of antenna remain unchanged.When logical circuit was connected, the mechanical shift pick-up unit was placed on the mobile object with a day line parallel, this moment, and antenna features frequency and signal intensity have at least one and change, and this moment, antenna was operated under the second resonant frequency.

As shown in Figure 4, be the utility model embodiment mechanical shift pick-up unit and the schematic diagram that the RFID label antenna directly links to each other, can detect the sketch of the passive RFID tags device 40 of mechanical shift variation.As shown in Figure 4, label apparatus 40 comprises 45, one integrated circuit 43 of a base and a double-doublet antenna 41,42.The mechanical shift pick-up unit 44 that links to each other with antenna 42 will affect the resistance of antenna 42.The material that mechanical shift pick-up unit 44 is suitable for can be controlled the frequency that any one had both been fixed a point according to any one current voltage in the antenna 41,42.With regard to an example, fixing up an

aerial wire

41,42 can make it produce resonance in identical frequency.With regard to another example, fixing up an

aerial wire

41,42 can make it produce resonance in different frequency.

In an example, transmitting

terminal antenna

41,42 is made by one or more different low electrical resistant materials, and these materials have higher electric conductivity, copper for example, silver, and aluminium, they link to each other with the above-mentioned mechanical shift pick-up unit of mentioning, when

antenna

41,42 are placed on the mobile object, and the mechanical shift pick-up unit can cause the variation of one or more transmitting terminal generation resonant frequencies, thereby cause a different frequency.The frequency of the variation of this frequency and reception and transmission is all different.For example, the mechanical shift pick-up unit is placed on the mobile object, will cause that at least one changes in transmission frequency and the receive frequency.

As shown in Figure 5, be differential screw formula inductance displacement measurement mechanism, it is by two identical

magnetic plugs

51,52, and skeleton 53 and unshakable in one's determination 54 forms.Unshakable in one's determination 53 are on the symmetric position of two

magnetic plugs

51,52 when flat, and the initial inductance value of both sides

magnetic plug

51,52 is equated.Two arms of two magnetic plugs and circuit electric bridge link to each other, be subjected to the time spent of doing of power that the measurand displacement produces when iron core, unshakable in one's determination mobile in magnetic plug, make the electric bridge out of trim, thereby make size and the direction that reflects the measurand displacement on the bridge output voltage.The range of dynamic measurement of differential helix tube type inductance displacement measurement mechanism is 1～200mm, and the linearity is 0.1%～1%, and resolution is less than 0.1um.

As shown in Figure 6, detect a kind of method flow diagram that mechanical shift changes for the utility model by the label apparatus with many antennas.What need to consider is, the above-mentioned device of mentioning carries out and the exchanging of a plurality of antennas with a label integrated circuit.

As shown in Figure 6,50, RFID reader sends energy and instruction to label apparatus.52, logical circuit is in the state of disconnection at initial time, label apparatus antenna reception energy and the instruction that does not link to each other with the mechanical shift pick-up unit.54, label apparatus is converted into DC (direct current) voltage to the electromagnetic wave that carries energy, thereby just can make label carry out the requirement of indication.And this conversion need to be used a charge pump, and a rectification circuit perhaps interconnects it, perhaps will use other energy conversion device.56, the sky alignment reader transmitted signal of label apparatus by not linking to each other with the mechanical shift pick-up unit.58, the energy intensity of receiving signal is measured and recorded to reader.60, reader sends the instruction of connecting logical circuit to label apparatus.62, label apparatus uses the antenna that links to each other with the mechanical shift pick-up unit to send data.64, the energy intensity of signal is received in the reader measurement.66, reader calculated goes out the fiducial value of a reflected signal intensity.68, reader changes into different mechanical shifts with fiducial value.With regard to an example, reader can be set the signal that a time period is used for receiving label, if do not receive signal, reader will be recorded as 0 with signal intensity.

In this system, reader will from the signal strength values of the antenna that does not link to each other with the mechanical shift pick-up unit as a reference value, compare its signal strength values with the label antenna that links to each other with the mechanical shift pick-up unit.By receive from the signal that links to each other with the mechanical shift pick-up unit with the transmitting terminal that does not link to each other with the mechanical shift pick-up unit, reader can be collected the fiducial value that represents unlike signal intensity.Then, the RFID reader can be converted into the residing mechanical shift of label to such fiducial value.With regard to a concrete example, configure this RFID reader and be in order to be converted into the mechanical shift value by the difference from the RF signal intensity of the antenna that connects or do not connect mechanical displacement detector of using that the reference data that stores will receive.

Best situation is, the antenna that do not connect mechanical displacement detector as a reference, can be filtered out the variation that causes owing to the coupling between label and the reader.In addition, just as previously mentioned, the mechanical shift pick-up unit is applied to the time length that the variation of the resistance value that can make it in the design and label be placed under the specific mechanical displacement and forms one to one relation.For example, the mechanical shift pick-up unit is only positioned at an antenna, can allow like this to change within the specific limits as a kind of function from the signal of RFID label apparatus, and this function function of when movement of objects, just having of antenna just.The same, by using the utility model, under the passive condition of RFID label, the RFID reader can detect label apparatus whether be placed on the movement of objects and the mechanical shift of object whether within the acceptable range.

Also can not perceive with the mechanical shift pick-up unit variation of mechanical shift with the various RFID labels of two antennas, the variation that the variation of sense mechanism displacement is based on resonant frequency on the antenna also can recognize antenna reception to the variation of signal.

For example pass through the design to the antenna that links to each other with the mechanical shift pick-up unit, can make the frequency of antenna at ISM (Industrial Scientific Medical, industry, science, medical science) the interior variation of frequency range, can connect this antenna that links to each other with mechanical shift pick-up unit and logical circuit on the label of standard.

For example label antenna can so be set in a concrete example, before movement of objects, the resonant frequency of antenna is 902-928MHZ, object is in case mobile, because the impact of mechanical shift, the resonant frequency of antenna is just reduced to 8995-927.5MHZ, frequency frequency range (902-928MHZ) at U.S. RFID is split into 52 channels, the channel that can not receive of skipping that reader can be random in these 52 channels goes, and the benefit of this jump of reader is exactly can a plurality of readers of effectively preventing to attempt the conflict of using same frequency to cause in same physical space.

For example in an example, RFID frequency range (902-928MHZ) is not to be divided into 52 channels but the antenna settings that on average has been divided into n channel tag is carried out work under this frequency range (902-928MHZ).Because label antenna links to each other with the mechanical shift pick-up unit, so as long as mechanical shift has surpassed the scope of predefined value, the frequency of operation of antenna tag antenna just drops among (899.5-927.5MHZ) this frequency range.Therefore compare just channel n to be got rid of from band limits with original frequency range and go, the frequency range (8995-927.5MHZ) after therefore changing just no longer allows label to carry out exchanging of information with channel n.

In concrete example, if the environment at label place has surpassed the mechanical shift scope of expection, reader can only send instruction to label by channel 1 to n-1, label also can be made a response, because the antenna in the label just can only be worked in this frequency range, when reader sends instruction with the frequency of n channel to label, because the variation of label mechanical shift has caused the resonant frequency of label antenna to drop to 8995-9275MHZ, just no longer make a response so no longer reach the 928MHZ label, pass information back reader.

Favourable aspect is because mechanical shift has exceeded the variation of the operating frequency of antenna that predefined value causes, is just reflected by the disappearance of this information interchange.

In model, reader can send an instruction between channel n-1 and channel n to label and check that further drift has occured the operating frequency range of label antenna, because label can receive the instruction that sends by channel n-1, and can be to the reader feedback information by channel n-1, because label can not receive the instruction that sends by channel n, and can not can to the reader feedback information, so just determine that drift has occured the operating frequency range of label antenna by channel n.

Drift and the utility model that the variation of mechanical shift causes the frequency of operation of label antenna to occur up and down are not limited in frequency range on average are divided into n channel.

The utility model embodiment can detect mechanical shift at lower cost to be changed, and the energy that utilizes RFID to obtain, and has solved the powerup issue that mechanical shift detects.

The enforcement of each characteristics of this system may relate to software, the combination that hardware also may relate to software and hardware just can reach, and for example the enforcement of many advantages of system is to realize with the mutual mode that exchanges of computer and other equipment machines with OO programming language with a kind of high-caliber processing by programming.Each such function program may be stored in the storage intermediary and for example be read to realize above-mentioned function by a computer and processor in the ROM (read-only memory).

Those skilled in the art can also recognize the various illustrative components, blocks (illustrative logical block) that the utility model embodiment lists, the unit, and step can pass through electronic hardware, computer software, or both combinations realize.Be the clear replaceability (interchangeability) of showing hardware and software, above-mentioned various illustrative components (illustrative components), unit and step have been described their function generally.Such function is to realize depending on the designing requirement of specific application and whole system by hardware or software.Those skilled in the art can be for every kind of specific application, and can make ins all sorts of ways realizes described function, but this realization should not be understood to exceed the scope of the utility model embodiment protection.

Various illustrative logical block described in the utility model embodiment, or the unit can pass through general processor, digital signal processor, special IC (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the design of above-mentioned any combination realizes or operates described function.General processor can be microprocessor, and alternatively, this general processor also can be any traditional processor, controller, microcontroller or state machine.Processor also can realize by the combination of calculation element, for example digital signal processor and microprocessor, multi-microprocessor, Digital Signal Processor Core of one or more microprocessors associatings, or any other similarly configuration realize.

Method described in the utility model embodiment or the step of algorithm can directly embed hardware, the software module of processor execution or the two combination.Software module can be stored in the storage medium of other arbitrary form in RAM storer, flash memory, ROM storer, eprom memory, eeprom memory, register, hard disk, moveable magnetic disc, CD-ROM or this area.Exemplarily, storage medium can be connected with processor so that processor can be from storage medium reading information, and can deposit write information to storage medium.Alternatively, storage medium can also be integrated in the processor.Processor and storage medium can be arranged among the ASIC, and ASIC can be arranged in the user terminal.Alternatively, processor and storage medium also can be arranged in the different parts in the user terminal.

In one or more exemplary designs, the described above-mentioned functions of the utility model embodiment can realize in hardware, software, firmware or this three's combination in any.If realize in software, these functions can be stored on the medium with computer-readable, or are transmitted on the medium of computer-readable with one or more instructions or code form.The computer-readable medium comprises the computer storage medium and is convenient to so that allow computer program transfer to other local telecommunication media from a place.Storage medium can be the useable medium that any general or special computer can access.For example, such computer readable media can include but not limited to RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage device, or other anyly can be used for carrying or storage can be read by general or special computer or general or special processor the program code of form with instruction or data structure and other medium.In addition, any connection can suitably be defined as the computer-readable medium, for example, if software is by a concentric cable, optical fiber computer, twisted-pair feeder, Digital Subscriber Line (DSL) or also being comprised in the defined computer-readable medium with wireless way for transmittings such as infrared, wireless and microwave from a web-site, server or other remote resource.Described video disc (disk) and disk (disc) comprise Zip disk, radium-shine dish, CD, DVD, floppy disk and Blu-ray Disc, and disk is usually with the magnetic duplication data, and video disc carries out the optical reproduction data with laser usually.Above-mentioned combination also can be included in the computer-readable medium.

Above-described embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is embodiment of the present utility model; and be not used in and limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. the RFID label with the mechanical shift pick-up unit is characterized in that, two pins are arranged on the chip of described RFID label; Two pins of described mechanical shift pick-up unit and this link to each other, and form parallel-connection structure with the antenna of described RFID label, the variation of extraneous mechanical shift can cause the variation of mechanical shift pick-up unit both end voltage or electric current, the circuit that is connected with the chip of RFID label at described mechanical shift pick-up unit has logical circuit and a voltage-resistance conversion equipment of controlling break-make, the circuit of this connection, this logical circuit and this voltage-resistance conversion equipment are the parts of chip, voltage-resistance conversion equipment is used for the variation of mechanical shift pick-up unit both end voltage or electric current is converted to the variation of resistance, the break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit disconnects, the mechanical shift pick-up unit not with the sky line parallel, be placed on the mobile object this moment, and the first resonant frequency and the signal intensity of antenna remain unchanged; When logical circuit was connected, the mechanical shift pick-up unit was placed on the mobile object with a day line parallel, this moment, and the characteristic frequency of antenna and signal intensity have at least one and change, and this moment, antenna was operated under the second resonant frequency; Described RFID label receives the instruction of RFID reader transmission with the break-make of control logic circuit, thereby realizes detecting from the difference between the signal intensity of the different frequency of antenna by comparison the change of mechanical shift.

2. as claimed in claim 1 with the RFID label of mechanical shift pick-up unit, it is characterized in that, the antenna of described RFID label is monopole antenna.

3. as claimed in claim 1 with the RFID label of mechanical shift pick-up unit, it is characterized in that, the antenna of described RFID label is double-doublet antenna: described mechanical shift pick-up unit and the voltage that links to each other with this mechanical shift pick-up unit-resistance conversion equipment form parallel-connection structure with antenna wherein; Perhaps described mechanical shift pick-up unit forms parallel-connection structure simultaneously with the voltage that links to each other with this mechanical shift pick-up unit-resistance conversion equipment and two antennas.

4. the RFID label with the mechanical shift pick-up unit is characterized in that, a pin is arranged on the chip of described RFID label; One end of described mechanical shift pick-up unit links to each other with this pin, the other end is connected on the antenna of described RFID label, and form parallel-connection structure with antenna, the variation of extraneous mechanical shift can cause the variation of mechanical shift pick-up unit both end voltage or electric current, the circuit that is connected with the chip of RFID label at described mechanical shift pick-up unit has logical circuit and a voltage-resistance conversion equipment of controlling break-make, the circuit of this connection, this logical circuit and this voltage-resistance conversion equipment are the parts of chip, voltage-resistance conversion equipment is used for the variation of mechanical shift pick-up unit both end voltage or electric current is converted to the variation of resistance, the break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit disconnects, the mechanical shift pick-up unit not with the sky line parallel, be placed on the mobile object this moment, and the first resonant frequency and the signal intensity of antenna remain unchanged; When logical circuit was connected, the mechanical shift pick-up unit was placed on the mobile object with a day line parallel, this moment, and the characteristic frequency of antenna and signal intensity have at least one and change, and this moment, antenna was operated under the second resonant frequency; Described RFID label receives the instruction of RFID reader transmission with the break-make of control logic circuit, thereby realizes detecting from the difference between the signal intensity of the different frequency of antenna by comparison the change of mechanical shift.

5. as claimed in claim 4 with the RFID label of mechanical shift pick-up unit, it is characterized in that, the antenna of described RFID label is monopole antenna.

6. as claimed in claim 4 with the RFID label of mechanical shift pick-up unit, it is characterized in that, the antenna of described RFID label is double-doublet antenna: described mechanical shift pick-up unit and the voltage that links to each other with this mechanical shift pick-up unit-resistance conversion equipment form parallel-connection structure with antenna wherein; Perhaps described mechanical shift pick-up unit forms parallel-connection structure simultaneously with the voltage that links to each other with this mechanical shift pick-up unit-resistance conversion equipment and two antennas.

7. RFID label with the mechanical shift pick-up unit, it is characterized in that, described mechanical shift pick-up unit is connected on the antenna of described RFID label, and form parallel-connection structure with antenna, the variation of extraneous mechanical shift can cause the variation of mechanical shift pick-up unit both end voltage or electric current, the circuit that is connected with antenna at described mechanical shift pick-up unit has logical circuit and a voltage-resistance conversion equipment of controlling break-make, the circuit of this connection, this logical circuit and this voltage-resistance conversion equipment are the parts of chip, voltage-resistance conversion equipment is used for the variation of mechanical shift pick-up unit both end voltage or electric current is converted to the variation of resistance, the break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit disconnects, the mechanical shift pick-up unit not with the sky line parallel, be placed on the mobile object this moment, and the first resonant frequency and the signal intensity of antenna remain unchanged; When logical circuit was connected, the mechanical shift pick-up unit was placed on the mobile object with a day line parallel, this moment, and the characteristic frequency of antenna and signal intensity have at least one and change, and this moment, antenna was operated under the second resonant frequency; Described RFID label receives the instruction of RFID reader transmission with the break-make of control logic circuit, thereby realizes detecting from the difference between the signal intensity of the different frequency of antenna by comparison the change of mechanical shift.

8. as claimed in claim 7 with the RFID label of mechanical shift pick-up unit, it is characterized in that, the antenna of described RFID label is monopole antenna.

9. as claimed in claim 7 with the RFID label of mechanical shift pick-up unit, it is characterized in that, the antenna of described RFID label is double-doublet antenna: described mechanical shift pick-up unit and the voltage that links to each other with this mechanical shift pick-up unit-resistance conversion equipment form parallel-connection structure with antenna wherein; Perhaps described mechanical shift pick-up unit forms parallel-connection structure simultaneously with the voltage that links to each other with this mechanical shift pick-up unit-resistance conversion equipment and two antennas.

10. rfid system with the mechanical shift pick-up unit, described rfid system comprises RFID label and RFID reader, it is characterized in that,

Described RFID label comprises each described RFID label with the mechanical shift pick-up unit among the claim 1-3, or each described RFID label with the mechanical shift pick-up unit among the claim 4-6, or each described RFID label with the mechanical shift pick-up unit among the claim 7-9;

Described RFID reader sends instruction with the break-make of the logical circuit of control RFID label, thereby detects the change of mechanical shift from the difference between the signal intensity of the different frequency of antenna by comparison.