CN102831463A - RFID (Radio Frequency Identification Device) label with mechanical displacement detection device, RFID system and mechanical displacement detection method - Google Patents

RFID (Radio Frequency Identification Device) label with mechanical displacement detection device, RFID system and mechanical displacement detection method Download PDF

Info

Publication number
CN102831463A
CN102831463A CN2012101835574A CN201210183557A CN102831463A CN 102831463 A CN102831463 A CN 102831463A CN 2012101835574 A CN2012101835574 A CN 2012101835574A CN 201210183557 A CN201210183557 A CN 201210183557A CN 102831463 A CN102831463 A CN 102831463A
Authority
CN
China
Prior art keywords
unit
pick
mechanical shift
antenna
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012101835574A
Other languages
Chinese (zh)
Inventor
王玉泉
霍灵瑜
刘丙午
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Wuzi University
Original Assignee
Beijing Wuzi University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Wuzi University filed Critical Beijing Wuzi University
Priority to CN2012101835574A priority Critical patent/CN102831463A/en
Publication of CN102831463A publication Critical patent/CN102831463A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Near-Field Transmission Systems (AREA)

Abstract

The invention provides an RFID (Radio Frequency Identification Device) label with a mechanical displacement detection device, an RFID system and a mechanical displacement detection method. The mechanical displacement detection device is connected in parallel with an antenna of the RFID label, a logic circuit for controlling connection or disconnection and a voltage-resistance conversion device are arranged on a line in which the mechanical displacement detection device is connected with a chip of the RFID label; when the logic circuit is disconnected, the mechanical displacement detection device is not connected in parallel with the antenna, and is placed on a moving object, and first resonant frequency and signal strength of the antenna are kept unchangeable; when the logic circuit is connected, the mechanical displacement detection device is connected in parallel with the antenna, and is placed on the moving object, at least one of the characteristic frequency and the signal strength of the antenna changes, and the antenna works in second resonant frequency; and the RFID label receives a command sent by a RFID reader so as to control the connection or disconnection of the logic circuit, and therefore the change of mechanical displacement is detected by comparing the difference between the strengths of signals with different frequencies from the antenna. According to the invention, the mechanical displacement change can be detected at low cost.

Description

A kind of RFID label, rfid system and mechanical shift detection method with the mechanical shift pick-up unit
Technical field
The present invention relates to RFID (Radio Frequency Identification, RF identification) technical field, relate 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 encapsulates, and can be attached on the object, and it comprises the microchip that an ability 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 radiofrequency signal, and can move other specific function.The antenna of RFID label is to be used for receiving and sending radiofrequency signal, and is applicable to a kind of special frequency usually.
In some equipment, when the mechanical shift that the rfid system that has the mechanical shift pick-up unit has been used to monitor product environment of living in has surpassed acceptable mechanical shift sight.In general these equipment requirements 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 requirements 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, its requires when not using lasting energy source or use a kind of adjunct circuit cheaply, to be used for detecting mechanical change in displacement.
Summary of the invention
The embodiment of the invention provides a kind of RFID label, rfid system with the mechanical shift pick-up unit, detects mechanical change in displacement at lower cost.
On the one hand, the embodiment of the invention provides a kind of RFID label with the mechanical shift pick-up unit, and two pins are arranged on the chip of said RFID label; Two pins of said mechanical shift pick-up unit and this link to each other; And form parallel-connection structure with the antenna of said RFID label; The variation of extraneous mechanical shift sight can cause mechanical shift pick-up unit voltage or change in current; Logical circuit and a voltage-resistance conversion equipment that a control break-make is arranged on said mechanical shift pick-up unit and circuit that the chip of RFID label is connected; 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 converting mechanical shift pick-up unit voltage or change in current to changes in resistance, the break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit breaks off, the mechanical shift pick-up unit not with the sky line parallel; Be placed on the mobile object this moment, and 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 one at least and change, and this moment, antenna was operated under second resonant frequency; Said RFID label receives the break-make of the instruction of RFID reader transmission with control logic circuit, thereby realizes detecting from the difference between the signal intensity of the different frequency of antenna through comparison the change of mechanical shift.
Optional, in an embodiment of the present invention, the antenna of said RFID label is a monopole antenna.
Optional, in an embodiment of the present invention, the antenna of said RFID label is a double-doublet antenna: said mechanical shift pick-up unit and the voltage-resistance conversion equipment that links to each other with this mechanical shift pick-up unit form parallel-connection structure with antenna wherein; Perhaps said mechanical shift pick-up unit forms parallel-connection structure simultaneously with the voltage-resistance conversion equipment that links to each other with this mechanical shift pick-up unit and two antennas.
Optional; In an embodiment of the present invention; Said voltage-resistance conversion equipment comprises: a variable voltage converts the equivalent electrical circuit of variable-resistance device or a ditch type FET or FET to, and said mechanical shift pick-up unit comprises: resistance-strain type displacement detector, electro-induction formula displacement detector, space-changeable type inductance displacement pass 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, reflecting light electric displacement pick-up unit, reflection type optical fiber displacement detector, pattern displacement pick-up unit, magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit.
On the other hand, the embodiment of the invention provides a kind of RFID label with the mechanical shift pick-up unit, and a pin is arranged on the chip of said RFID label; One end of said mechanical shift pick-up unit links to each other with this pin; The other end is connected on the antenna of said RFID label; And form parallel-connection structure with antenna; The variation of extraneous mechanical shift sight can cause mechanical shift pick-up unit voltage or change in current; Logical circuit and a voltage-resistance conversion equipment of a control break-make are arranged on said mechanical shift pick-up unit and circuit that the chip of RFID label is connected, and the circuit of this connection, this logical circuit and this voltage-resistance conversion equipment are the parts of chip, and voltage-resistance conversion equipment is used for converting mechanical shift pick-up unit voltage or change in current to changes in resistance; The break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit breaks off; The mechanical shift pick-up unit not with the sky line parallel, this moment be placed on the mobile object, 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 one at least and change, and this moment, antenna was operated under second resonant frequency; Said RFID label receives the break-make of the instruction of RFID reader transmission with control logic circuit, thereby realizes detecting from the difference between the signal intensity of the different frequency of antenna through comparison the change of mechanical shift.
Optional, in an embodiment of the present invention, the antenna of said RFID label is a monopole antenna.
Optional, in an embodiment of the present invention, the antenna of said RFID label is a double-doublet antenna: said mechanical shift pick-up unit and the voltage-resistance conversion equipment that links to each other with this mechanical shift pick-up unit form parallel-connection structure with antenna wherein; Perhaps said mechanical shift pick-up unit forms parallel-connection structure simultaneously with the voltage-resistance conversion equipment that links to each other with this mechanical shift pick-up unit and two antennas.
Optional; In an embodiment of the present invention; Said voltage-resistance conversion equipment comprises: a variable voltage converts the equivalent electrical circuit of variable-resistance device or a ditch type FET or FET to, and said mechanical shift pick-up unit comprises: resistance-strain type displacement detector, electro-induction formula displacement detector, space-changeable type inductance displacement pass 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, reflecting light electric displacement pick-up unit, reflection type optical fiber displacement detector, pattern displacement pick-up unit, magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit.
Another aspect; The embodiment of the invention provides a kind of RFID label with the mechanical shift pick-up unit; Said mechanical shift pick-up unit is connected on the antenna of said RFID label; And forming parallel-connection structure with antenna, the variation of extraneous mechanical shift sight can cause mechanical shift pick-up unit voltage or change in current, on said mechanical shift pick-up unit and circuit that antenna is connected, a logical circuit and a voltage-resistance conversion equipment of controlling break-make is arranged; 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 converting mechanical shift pick-up unit voltage or change in current to changes in resistance, the break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit breaks off, the mechanical shift pick-up unit not with the sky line parallel; Be placed on the mobile object this moment, and 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 one at least and change, and this moment, antenna was operated under second resonant frequency; Said RFID label receives the break-make of the instruction of RFID reader transmission with control logic circuit, thereby realizes detecting from the difference between the signal intensity of the different frequency of antenna through comparison the change of mechanical shift.
Optional, in an embodiment of the present invention, the antenna of said RFID label is a monopole antenna.
Optional, in an embodiment of the present invention, the antenna of said RFID label is a double-doublet antenna: said mechanical shift pick-up unit and the voltage-resistance conversion equipment that links to each other with this mechanical shift pick-up unit form parallel-connection structure with antenna wherein; Perhaps said mechanical shift pick-up unit forms parallel-connection structure simultaneously with the voltage-resistance conversion equipment that links to each other with this mechanical shift pick-up unit and two antennas.
Optional; In an embodiment of the present invention; Said voltage-resistance conversion equipment comprises: a variable voltage converts the equivalent electrical circuit of variable-resistance device or a ditch type FET or FET to, and said mechanical shift pick-up unit comprises: resistance-strain type displacement detector, electro-induction formula displacement detector, space-changeable type inductance displacement pass 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, reflecting light electric displacement pick-up unit, reflection type optical fiber displacement detector, pattern displacement pick-up unit, magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit.
Another aspect, the embodiment of the invention provide a kind of rfid system with the mechanical shift pick-up unit, and said rfid system comprises RFID label and RFID reader, and said RFID label comprises the RFID label of above-mentioned band mechanical shift pick-up unit; Said RFID reader sends the break-make of instruction with 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 through comparison.
Again on the one hand; The embodiment of the invention provides a kind of mechanical shift detection method of the rfid system with the mechanical shift pick-up unit; Said mechanical shift detection method is applied to the rfid system of above-mentioned band mechanical shift pick-up unit, comprising: send the break-make of instruction with the logical circuit of control RFID label through said RFID reader; Receive the break-make of the instruction of RFID reader transmission through the RFID label: when logical circuit breaks off with control logic circuit; The mechanical shift pick-up unit not with the sky line parallel; Be placed on the mobile object this moment, and 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 one at least and change, and this moment, antenna was operated under second resonant frequency; Utilize the comparison of said RFID reader to detect the change of mechanical shift from the difference between the signal intensity of the different frequency of antenna.
Technique scheme has following beneficial effect: because adopt a kind of RFID label with the mechanical shift pick-up unit; The antenna of said mechanical shift pick-up unit and said RFID label forms parallel-connection structure; The variation of extraneous mechanical shift sight can cause mechanical shift pick-up unit voltage or change in current; Logical circuit and a voltage-resistance conversion equipment that a control break-make is arranged on said mechanical shift pick-up unit and circuit that the chip of RFID label is connected; 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 converting mechanical shift pick-up unit voltage or change in current to changes in resistance, the break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit breaks off, the mechanical shift pick-up unit not with the sky line parallel; Be placed on the mobile object this moment, and 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 one at least and change, and this moment, antenna was operated under second resonant frequency; Said RFID label receives the break-make of the instruction of RFID reader transmission with control logic circuit; Thereby realize detecting from the difference between the signal intensity of the different frequency of antenna the technological means of the change of mechanical shift through comparison; So reached the technique effect that can detect mechanical change in displacement at lower cost; 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 embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The synoptic diagram that Fig. 1 is connected with the RFID label chip for embodiment of the invention mechanical shift pick-up unit;
Fig. 2 is the equivalent circuit diagram of RFID label chip inside antenna;
Fig. 3 is the synoptic diagram that embodiment of the invention mechanical shift pick-up unit, logic switch and voltage-resistance conversion equipment are connected with RFID label chip inside antenna equivalent electrical circuit;
The synoptic diagram that Fig. 4 directly is connected for embodiment of the invention mechanical shift pick-up unit and RFID label antenna;
Fig. 5 is the structure key diagram of embodiment of the invention mechanical shift pick-up unit;
Fig. 6 is the process flow diagram of the embodiment of the invention based on the mechanical shift sight detection method of signal intensity.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The mechanical shift pick-up unit of the embodiment of the invention links to each other with the chip of RFID label and has three kinds of situation at least:
The two pins structure:
The present invention is a kind of device, system and technology that is used for detecting the mechanical shift scene change.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 sight can cause mechanical shift pick-up unit voltage or change in current.Logical circuit and a voltage-resistance conversion equipment of a control break-make are arranged on pin and circuit that chip is connected, and the 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 to convert mechanical shift pick-up unit voltage or change in current to changes in resistance.The break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel.When logical circuit breaks off, 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 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 one at least and change, and this moment, antenna was operated under second resonant frequency.Reader can send the break-make of instruction control logical circuit to label, when logical circuit is connected, can detect the change of mechanical shift through comparison from the difference between the signal intensity of the different frequency of antenna.
With regard to an instance, this system has comprised a label, has only 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.Logical circuit and a voltage-resistance conversion equipment of a control break-make are arranged on pin and circuit that chip is connected, and the 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 to convert mechanical shift pick-up unit voltage or change in current to changes in resistance.The machinery displacement detector is placed on the mobile object when logical circuit is connected, and antenna features frequency and signal intensity have one at least and change, and it is operated under second resonant frequency.Reader can send instruction to label, and the difference between the signal intensity of the different frequency during through the comparison logic break-make 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 FET or FET.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; Reflecting light electric displacement pick-up unit; The reflection type optical fiber displacement detector; The pattern displacement pick-up unit; 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 instance, this system has comprised a label, and two antennas (double-doublet antenna) are arranged on this label.Two kinds of situation are arranged this moment.First kind of 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.Logical circuit and a voltage-resistance conversion equipment of a control break-make are arranged on pin and circuit that chip is connected, and the 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 to convert mechanical shift pick-up unit voltage or change in current to changes in resistance.This moment voltage-resistance conversion equipment of linking to each other with the mechanical shift pick-up unit 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 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 through comparison logic.Difference between the signal intensity of the different frequency during logical circuit break-make through second antenna self relatively also can detect the change of mechanical shift.Second kind of situation is that two pins of mechanical shift pick-up unit and this link to each other, and form parallel-connection structure simultaneously with two antennas.Logical circuit and a voltage-resistance conversion equipment of a control break-make are arranged on pin and circuit that chip is connected, and the 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 to convert mechanical shift pick-up unit voltage or change in current to changes in resistance.Voltage-resistance conversion equipment that link to each other with the mechanical shift pick-up unit this moment is also simultaneously parallelly connected with these two antennas, and the situation that this and label only contain an antenna is similar.When logical circuit is connected, be placed on the mobile object, antenna features frequency and signal intensity have one at least and change, and it is operated under second resonant frequency.Reader can send instruction to label, and the difference between the signal intensity of the different frequency during through the comparison logic break-make can detect the change of mechanical shift.First kind of situation circuit connection is fairly simple, and the resonant frequency of two antennas maybe be different during work, can influence the precision of measurement.Second kind of 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 FET or FET.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; Reflecting light electric displacement pick-up unit; The reflection type optical fiber displacement detector; The pattern displacement pick-up unit; 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 day line parallel.Simultaneously on pin and circuit that the chip internal circuit is connected, a logical circuit of controlling break-make is arranged.In addition, on the circuit of antenna again the parallel connection a voltage-resistance conversion equipment, voltage-resistance conversion equipment has circuit to be connected with the two-termial line of mechanical shift pick-up unit and logical circuit again.When logical circuit breaks off, the mechanical shift pick-up unit not with the sky line parallel, this moment be placed on the mobile object, 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 one at least and change, and it is operated under second resonant frequency.Reader can send the break-make of instruction control logical circuit to label, when logical circuit is connected, can detect the change of mechanical shift through comparison from the difference between the signal intensity of the different frequency of antenna.
With regard to an instance, this system has comprised a label, has only 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.Logical circuit and a voltage-resistance conversion equipment of a control break-make are arranged on pin and circuit that chip is connected, and the 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 to convert mechanical shift pick-up unit voltage or change in current to changes in resistance.When logical circuit is connected, be placed on the mobile object, antenna features frequency and signal intensity have one at least and change, and it is operated under second resonant frequency.Reader can send instruction to label, and the difference between the signal intensity of the different frequency during through the comparison logic break-make 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 FET or FET.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; Reflecting light electric displacement pick-up unit; The reflection type optical fiber displacement detector; The pattern displacement pick-up unit; 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 instance, 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.Logical circuit and a voltage-resistance conversion equipment of a control break-make are arranged on pin and circuit that chip is connected, and the 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 to convert mechanical shift pick-up unit voltage or change in current to changes in resistance.This moment voltage-resistance conversion equipment of linking to each other with the mechanical shift pick-up unit 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 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 through comparison logic, 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 through 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 FET or FET.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; Reflecting light electric displacement pick-up unit; The reflection type optical fiber displacement detector; The pattern displacement pick-up unit; The magnetic-grid-type displacement detector; Photoelectric encoder; Inductosyn; The linear pattern inductosyn; Circular inductosyn; Hall-type microdisplacement pick-up unit etc.
No 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.Logical circuit and a voltage-resistance conversion equipment of a control break-make are arranged on antenna and circuit that chip is connected, and the 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 to convert mechanical shift pick-up unit voltage or change in current to changes in 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 first resonant frequency.When being placed on the mobile object, second resonant frequency of antenna and signal intensity have one at least 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 through comparison.
With regard to an instance, 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.Logical circuit and a voltage-resistance conversion equipment of a control break-make are arranged on antenna and circuit that chip is connected, and the 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 to convert mechanical shift pick-up unit voltage or change in current to changes in 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 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 through 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 FET or FET.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; Reflecting light electric displacement pick-up unit; The reflection type optical fiber displacement detector; The pattern displacement pick-up unit; 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 one or more mechanical shift pick-up units accordingly, 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, on the object that is placed on and moves, 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 through comparison.
With regard to a kind of instantiation of mechanical shift pick-up unit, the method for simultaneous comparison numerical value comprises that these are compared numerical value compares with most signal strength values.These signal strength values belong to different frequencies, and interrelate with the mechanical shift sight of majority, can detect the intensity of mechanical shift simultaneously based on the above-mentioned comparison 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 when signal when promptly above-mentioned logical circuit breaks off and logical circuit are connected, and these two kinds of signals have at least a kind of meeting that the request that receives 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 and logical circuit when connecting and to break off, and be converted into the varying level of mechanical shift to these fiducial values from the logical circuit of label.
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 on this connection line.Mechanical shift pick-up unit and antenna form parallel-connection structure.Logical circuit and a voltage-resistance conversion equipment of a control break-make are arranged on antenna and circuit that chip is connected, and the 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 to convert mechanical shift pick-up unit voltage or change in current to changes in resistance.Under logical circuit break-make whether two kinds of situation, this antenna has two kinds of corresponding with it different frequencies, i.e. first resonant frequency and second resonant frequency.Connect and be positioned over this label apparatus on the mobile object when logical circuit,, will produce the intensity level of unlike signal owing to the variation of resonant frequency.
In an example, the RFID label apparatus comprises first, second two antennas.Better situation is; 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 strength values.
As shown in Figure 1, the synoptic diagram of the mechanical shift sensor label 10 that is connected with the RFID label chip for embodiment of the invention mechanical shift pick-up unit.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 parallelly connected with the equivalent electrical circuit of antenna at chip internal, and the logical circuit of a control break-make is arranged on the circuit that connects.Mechanical shift pick-up unit and antenna form parallel-connection structure.Logical circuit and a voltage-resistance conversion equipment of a control break-make are arranged on antenna and circuit that chip is connected, and the 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 to convert mechanical shift pick-up unit voltage or change in current to changes in resistance.Whether mechanical displacement detector can be controlled by in the access chip circuit through the break-make of logical circuit, thereby the frequency of the antenna that links to each other with radio-frequency module can be influenced.When logical circuit broke off, label antenna was with the first resonant frequency communication.When logical circuit is connected, be placed on the mobile object, antenna is operated under second resonant frequency, and its characteristic frequency and signal intensity have one at least and change.
In an example, transmitting terminal antenna 11,12 is processed 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 antenna 11,12 through two pins 16,17 with the above-mentioned mechanical shift pick-up unit of mentioning; When antenna 11,12 is placed on the mobile object, 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 positioned on the mobile object, will cause sending that at least one changes in 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 moving, and during movement of objects, it will reduce then.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 invention 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; Reflecting light electric displacement pick-up unit; The reflection type optical fiber displacement detector; The pattern displacement pick-up unit; 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 sight that causes changing possibly be that a specific mechanical shift value also possibly be a scope of mechanical shift value selectively.The length of time must cause the variation of antenna resonance frequency, and antenna quality also can cause different variations.The type of the mechanical shift pick-up unit that for example, has on the antenna can influence the length that changes the antenna resonance frequency required time.
As shown in Figure 2, be the equivalent circuit diagram of RFID label antenna.In the alternating magnetic field that tag coil antenna entering 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 the primary coil and the secondary coil of transformer.Resonant tank by label antenna forms is as shown in Figure 2; The coil inductance (L), stray capacitance (Cp) and the shunt capacitance (C2) that comprise label antenna; Its resonance frequency is the parallelly connected equivalent capacity of Cp and C2 for C in
Figure BSA00000731251700111
formula; 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 have the Ferrite Material of high permeability in the inner insertion of tag antenna coil; With the increase mutual induction amount, thus the little problem of compensating coil xsect.
As shown in Figure 3, be embodiment of the invention mechanical shift pick-up unit, the logical circuit of control break-make and the synoptic diagram that voltage-resistance conversion equipment is connected with RFID label antenna equivalent electrical circuit.Resonant tank by label antenna forms is as shown in the figure; The coil inductance (L), stray capacitance (Cp) and the shunt capacitance (C2) that comprise label antenna; Its resonance frequency is the parallelly connected equivalent capacity of Cp and C2 for
Figure BSA00000731251700121
formula C; 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 breaks off, the mechanical shift pick-up unit not with the sky line parallel, this moment be placed on the mobile object, 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 one at least and change, and this moment, antenna was operated under second resonant frequency.
As shown in Figure 4, be the synoptic diagram that embodiment of the invention mechanical shift pick-up unit and RFID label antenna directly link to each other, can detect the sketch of the passive RFID tags device 40 of mechanical change in displacement.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 influence 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 instance, fixing up an aerial wire 41,42 can make it produce resonance in identical frequency.With regard to another instance, fixing up an aerial wire 41,42 can make it produce resonance in different frequency.
In an example, transmitting terminal antenna 41,42 is processed by one or more different low electrical resistant materials; 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 positioned on the mobile object, will cause sending that at least one changes in 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 moving, and during movement of objects, it will reduce then.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 invention 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; Reflecting light electric displacement pick-up unit; The reflection type optical fiber displacement detector; The pattern displacement pick-up unit; 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 sight that causes changing possibly be that a specific mechanical shift value also possibly be a scope of mechanical shift value selectively.The length of time must cause the variation of antenna resonance frequency, and antenna quality also can cause different variations.The type of the mechanical shift pick-up unit that for example, has on the antenna can influence the length that changes the antenna resonance frequency required time.
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 is formed.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; Receive 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, for the present invention detects a kind of method flow diagram that mechanical shift changes through the label apparatus that uses many antennas.What need consider is, the above-mentioned device of mentioning uses a label integrated circuit to carry out and the exchanging of a plurality of antennas.
As shown in Figure 6,50, the RFID reader sends energy and instruction to label apparatus.52, logical circuit is in the state of disconnection at initial time, and label apparatus is with the antenna received energy and the instruction that do 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 be used a charge pump, and a rectification circuit perhaps interconnects it, perhaps will use other energy conversion device.56, label apparatus sends signal through the sky alignment reader that does not link to each other with the mechanical shift pick-up unit.58, the energy intensity of receiving signal is measured and write down to reader.60, reader sends the instruction of connecting logical circuit to label apparatus.62, label apparatus is used the antenna transmission data that link to each other with the mechanical shift pick-up unit.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 shift sights with fiducial value.With regard to an instance, 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 compare its signal strength values with the label antenna that links to each other with the mechanical shift pick-up unit 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.Through 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 of representing unlike signal intensity.Then, the RFID reader can be converted into the residing mechanical shift sight of label to such fiducial value.With regard to a concrete instance, disposing this RFID reader is to be converted into the mechanical shift value for the difference from the RF signal intensity that connects the antenna that does not perhaps connect mechanical displacement detector that will receive through the reference data of using storage.
Best situation is, with the antenna that does not connect mechanical displacement detector as a reference, can be with owing to the variation that coupling caused between label and the reader filters out.In addition, as before mention, the mechanical shift pick-up unit is applied to the time length that variation and the label of the resistance value that can make it in the design be placed under the specific mechanical displacement and forms relation one to one.For example, the mechanical shift pick-up unit is only positioned on 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, the application of the invention, 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.
Do not use the various RFID labels of two antennas also can perceive the variation of mechanical shift with the mechanical shift pick-up unit, the variation that the variation of sense mechanism displacement is based on resonant frequency on the antenna also can recognize the variation that antenna receives signal.
For example pass through design to the antenna that links to each other with the mechanical shift pick-up unit; The frequency that can make antenna is 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 instance; Before movement of objects; The resonant frequency of antenna is 902-928MHZ, and in a single day object moves, because the influence of mechanical shift; The resonant frequency of antenna is just reduced to 899.5-927.5MHZ; Frequency frequency range (902-928MHZ) at U.S. RFID is split into 52 channels, and reader can be skipped the channel that can not receive at random in these 52 channels, and the benefit of this jump of reader is exactly can a plurality of readers of effectively preventing in same physical space, to attempt the conflict of using same frequency to cause.
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 (899.5-927.5MHZ) after therefore changing is carried out exchanging of information with regard to no longer allowing label with channel n.
In concrete instance; If the environment at label place has surpassed the mechanical shift scope of expection; Reader can only send instruction to label through channel 1 to n-1, and label also can be made a response, because the antenna in the label just can only be worked in this frequency range; When reader with the frequency of n channel when label sends instruction; Because the variation of label mechanical shift has caused the resonant frequency of label antenna to drop to 8995-927.5MHZ, 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 further check that drift has taken place the operating frequency range of label antenna; Because label can receive the instruction that sends through channel n-1; And can be to the reader feedback information through channel n-1; Because label can not receive the instruction that sends through channel n, and can not can so just confirm that drift has taken place the operating frequency range of label antenna to the reader feedback information through channel n.
The variation of mechanical shift causes the frequency of operation of label antenna to take place upwards to be not limited in downward drift and the present invention frequency range on average is divided into n channel.
The embodiment of the invention can detect mechanical change in displacement at lower cost, 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 possibly 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 object oriented programming languages with a kind of high-caliber processing through programming.Each such function program for example possibly be stored in the storage intermediary in the ROM (read-only memory) to be read by a computer and processor and realize above-mentioned function.
Those skilled in the art can also recognize the various illustrative components, blocks (illustrative logical block) that the embodiment of the invention is listed, and unit and step can be passed 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 certain applications and total system through hardware or software.Those skilled in the art can be for every kind of certain applications, and can make ins all sorts of ways realizes described function, but this realization should not be understood that to exceed the scope of embodiment of the invention protection.
Various illustrative logical block described in the embodiment of the invention; 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 through the combination of calculation element, for example digital signal processor and microprocessor, a plurality of microprocessors, Digital Signal Processor Core of one or more microprocessors associatings, or any other similarly configuration realize.
The method described in the embodiment of the invention 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 storer, 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 read information from storage medium, 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 various parts in the user terminal.
In one or more exemplary designs, the described above-mentioned functions of the embodiment of the invention can realize in hardware, software, firmware or this three's combination in any.If in software, realize, these functions can be stored on the media with computer-readable, or are transmitted on the media of computer-readable with one or more instructions or code form.The computer-readable media comprises that the computer storage medium lets computer program transfer to other local telecommunication media from a place with being convenient to make.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 any can be used to carry or store with instruction or data structure and other can be read the media of the program code of form by general or special computer or general or special processor.In addition; Any connection can suitably be defined as the computer-readable media; For example, if software is through a concentric cable, optical fiber computer, twisted-pair feeder, Digital Subscriber Line (DSL) or also being comprised in the defined computer-readable media with wireless mode transmission such as for example infrared, wireless and microwaves 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 media.
Above-described embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely embodiment of the present invention; And be not used in qualification protection scope of the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (14)

1. the RFID label with the mechanical shift pick-up unit is characterized in that, two pins are arranged on the chip of said RFID label; Two pins of said mechanical shift pick-up unit and this link to each other; And form parallel-connection structure with the antenna of said RFID label; The variation of extraneous mechanical shift sight can cause mechanical shift pick-up unit voltage or change in current; Logical circuit and a voltage-resistance conversion equipment that a control break-make is arranged on said mechanical shift pick-up unit and circuit that the chip of RFID label is connected; 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 converting mechanical shift pick-up unit voltage or change in current to changes in resistance, the break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit breaks off, the mechanical shift pick-up unit not with the sky line parallel; Be placed on the mobile object this moment, and 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 one at least and change, and this moment, antenna was operated under second resonant frequency; Said RFID label receives the break-make of the instruction of RFID reader transmission with control logic circuit, thereby realizes detecting from the difference between the signal intensity of the different frequency of antenna through comparison the change of mechanical shift.
2. according to claim 1 with the RFID label of mechanical shift pick-up unit, it is characterized in that the antenna of said RFID label is a monopole antenna.
3. according to claim 1 with the RFID label of mechanical shift pick-up unit; It is characterized in that the antenna of said RFID label is a double-doublet antenna: said mechanical shift pick-up unit and the voltage-resistance conversion equipment that links to each other with this mechanical shift pick-up unit form parallel-connection structure with antenna wherein; Perhaps said mechanical shift pick-up unit forms parallel-connection structure simultaneously with the voltage-resistance conversion equipment that links to each other with this mechanical shift pick-up unit and two antennas.
4. according to claim 1 with the RFID label of mechanical shift pick-up unit; It is characterized in that; Said voltage-resistance conversion equipment comprises: a variable voltage converts the equivalent electrical circuit of variable-resistance device or a ditch type FET or FET to, and said mechanical shift pick-up unit comprises: resistance-strain type displacement detector, electro-induction formula displacement detector, space-changeable type inductance displacement pass 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, reflecting light electric displacement pick-up unit, reflection type optical fiber displacement detector, pattern displacement pick-up unit, magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit.
5. the RFID label with the mechanical shift pick-up unit is characterized in that, a pin is arranged on the chip of said RFID label; One end of said mechanical shift pick-up unit links to each other with this pin; The other end is connected on the antenna of said RFID label; And form parallel-connection structure with antenna; The variation of extraneous mechanical shift sight can cause mechanical shift pick-up unit voltage or change in current; Logical circuit and a voltage-resistance conversion equipment of a control break-make are arranged on said mechanical shift pick-up unit and circuit that the chip of RFID label is connected, and the circuit of this connection, this logical circuit and this voltage-resistance conversion equipment are the parts of chip, and voltage-resistance conversion equipment is used for converting mechanical shift pick-up unit voltage or change in current to changes in resistance; The break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit breaks off; The mechanical shift pick-up unit not with the sky line parallel, this moment be placed on the mobile object, 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 one at least and change, and this moment, antenna was operated under second resonant frequency; Said RFID label receives the break-make of the instruction of RFID reader transmission with control logic circuit, thereby realizes detecting from the difference between the signal intensity of the different frequency of antenna through comparison the change of mechanical shift.
6. like the RFID label of the said band mechanical shift of claim 5 pick-up unit, it is characterized in that the antenna of said RFID label is a monopole antenna.
7. like the RFID label of the said band mechanical shift of claim 5 pick-up unit; It is characterized in that the antenna of said RFID label is a double-doublet antenna: said mechanical shift pick-up unit and the voltage-resistance conversion equipment that links to each other with this mechanical shift pick-up unit form parallel-connection structure with antenna wherein; Perhaps said mechanical shift pick-up unit forms parallel-connection structure simultaneously with the voltage-resistance conversion equipment that links to each other with this mechanical shift pick-up unit and two antennas.
8. like the RFID label of the said band mechanical shift of claim 5 pick-up unit; It is characterized in that; Said voltage-resistance conversion equipment comprises: a variable voltage converts the equivalent electrical circuit of variable-resistance device or a ditch type FET or FET to, and said mechanical shift pick-up unit comprises: resistance-strain type displacement detector, electro-induction formula displacement detector, space-changeable type inductance displacement pass 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, reflecting light electric displacement pick-up unit, reflection type optical fiber displacement detector, pattern displacement pick-up unit, magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit.
9. RFID label with the mechanical shift pick-up unit; It is characterized in that; Said mechanical shift pick-up unit is connected on the antenna of said RFID label; And forming parallel-connection structure with antenna, the variation of extraneous mechanical shift sight can cause mechanical shift pick-up unit voltage or change in current, on said mechanical shift pick-up unit and circuit that antenna is connected, a logical circuit and a voltage-resistance conversion equipment of controlling break-make is arranged; 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 converting mechanical shift pick-up unit voltage or change in current to changes in resistance, the break-make of logical circuit determined the mechanical shift pick-up unit whether with the sky line parallel: when logical circuit breaks off, the mechanical shift pick-up unit not with the sky line parallel; Be placed on the mobile object this moment, and 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 one at least and change, and this moment, antenna was operated under second resonant frequency; Said RFID label receives the break-make of the instruction of RFID reader transmission with control logic circuit, thereby realizes detecting from the difference between the signal intensity of the different frequency of antenna through comparison the change of mechanical shift.
10. like the RFID label of the said band mechanical shift of claim 9 pick-up unit, it is characterized in that the antenna of said RFID label is a monopole antenna.
11. RFID label like the said band mechanical shift of claim 9 pick-up unit; It is characterized in that the antenna of said RFID label is a double-doublet antenna: said mechanical shift pick-up unit and the voltage-resistance conversion equipment that links to each other with this mechanical shift pick-up unit form parallel-connection structure with antenna wherein; Perhaps said mechanical shift pick-up unit forms parallel-connection structure simultaneously with the voltage-resistance conversion equipment that links to each other with this mechanical shift pick-up unit and two antennas.
12. RFID label like the said band mechanical shift of claim 9 pick-up unit; It is characterized in that; Said voltage-resistance conversion equipment comprises: a variable voltage converts the equivalent electrical circuit of variable-resistance device or a ditch type FET or FET to, and said mechanical shift pick-up unit comprises: resistance-strain type displacement detector, electro-induction formula displacement detector, space-changeable type inductance displacement pass 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, reflecting light electric displacement pick-up unit, reflection type optical fiber displacement detector, pattern displacement pick-up unit, magnetic-grid-type displacement detector, photoelectric encoder, inductosyn, linear pattern inductosyn, circular inductosyn, Hall-type microdisplacement pick-up unit.
13. the rfid system with the mechanical shift pick-up unit, said rfid system comprises RFID label and RFID reader, it is characterized in that,
Said RFID label comprises the RFID label of each said band mechanical shift pick-up unit among the claim 1-4; Or the RFID label of each said band mechanical shift pick-up unit among the claim 5-8, or the RFID label of each said band mechanical shift pick-up unit among the claim 9-12;
Said RFID reader sends the break-make of instruction with 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 through comparison.
14. the mechanical shift detection method with the rfid system of mechanical shift pick-up unit is characterized in that, said mechanical shift detection method is applied to the rfid system of the said band mechanical shift of claim 13 pick-up unit, comprising:
Send the break-make of instruction through said RFID reader with the logical circuit of control RFID label;
Receive the break-make of the instruction of RFID reader transmission through the RFID label: when logical circuit breaks off with control logic circuit; The mechanical shift pick-up unit not with the sky line parallel; Be placed on the mobile object this moment, and 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 one at least and change, and this moment, antenna was operated under second resonant frequency;
Utilize the comparison of said RFID reader to detect the change of mechanical shift from the difference between the signal intensity of the different frequency of antenna.
CN2012101835574A 2012-06-01 2012-06-01 RFID (Radio Frequency Identification Device) label with mechanical displacement detection device, RFID system and mechanical displacement detection method Pending CN102831463A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012101835574A CN102831463A (en) 2012-06-01 2012-06-01 RFID (Radio Frequency Identification Device) label with mechanical displacement detection device, RFID system and mechanical displacement detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012101835574A CN102831463A (en) 2012-06-01 2012-06-01 RFID (Radio Frequency Identification Device) label with mechanical displacement detection device, RFID system and mechanical displacement detection method

Publications (1)

Publication Number Publication Date
CN102831463A true CN102831463A (en) 2012-12-19

Family

ID=47334585

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012101835574A Pending CN102831463A (en) 2012-06-01 2012-06-01 RFID (Radio Frequency Identification Device) label with mechanical displacement detection device, RFID system and mechanical displacement detection method

Country Status (1)

Country Link
CN (1) CN102831463A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108510040A (en) * 2017-02-27 2018-09-07 中国钢铁股份有限公司 Wireless radio frequency identification mark and use its label paper product
CN108871248A (en) * 2018-06-20 2018-11-23 华中科技大学 A kind of absolute-type position detection device can be applied to super large stroke detection
CN109598324A (en) * 2018-12-06 2019-04-09 苏州晟达力芯电子科技有限公司 A kind of radio frequency chip, electronic tag, detection device and displacement detecting method
CN110017760A (en) * 2019-04-15 2019-07-16 同济大学 Passive and wireless displacement sensor and displacement sensing system based on helical antenna

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1965324A (en) * 2004-04-08 2007-05-16 3M创新有限公司 Variable frequency radio frequency identification (RFID) tags
CN101383020A (en) * 2008-10-14 2009-03-11 厦门大学 Environment sensitive type passive electronic label
CN201741039U (en) * 2010-08-31 2011-02-09 东南大学 Lane position automatic tracking device
CN202694397U (en) * 2012-06-01 2013-01-23 北京物资学院 Radio frequency identification (RFID) label with mechanical shift detection device and RFID system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1965324A (en) * 2004-04-08 2007-05-16 3M创新有限公司 Variable frequency radio frequency identification (RFID) tags
CN101383020A (en) * 2008-10-14 2009-03-11 厦门大学 Environment sensitive type passive electronic label
CN201741039U (en) * 2010-08-31 2011-02-09 东南大学 Lane position automatic tracking device
CN202694397U (en) * 2012-06-01 2013-01-23 北京物资学院 Radio frequency identification (RFID) label with mechanical shift detection device and RFID system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108510040A (en) * 2017-02-27 2018-09-07 中国钢铁股份有限公司 Wireless radio frequency identification mark and use its label paper product
CN108871248A (en) * 2018-06-20 2018-11-23 华中科技大学 A kind of absolute-type position detection device can be applied to super large stroke detection
CN108871248B (en) * 2018-06-20 2019-09-20 华中科技大学 A kind of absolute-type position detection device can be applied to super large stroke detection
CN109598324A (en) * 2018-12-06 2019-04-09 苏州晟达力芯电子科技有限公司 A kind of radio frequency chip, electronic tag, detection device and displacement detecting method
CN109598324B (en) * 2018-12-06 2021-09-07 苏州晟达力芯电子科技有限公司 Radio frequency chip, electronic tag, detection equipment and displacement detection method
CN110017760A (en) * 2019-04-15 2019-07-16 同济大学 Passive and wireless displacement sensor and displacement sensing system based on helical antenna
CN110017760B (en) * 2019-04-15 2024-05-10 同济大学 Passive wireless displacement sensor and displacement sensing system based on spiral antenna

Similar Documents

Publication Publication Date Title
CN102750578A (en) RFID (Radio Frequency Identification Devices) label with mechanical displacement detector, RFID system and mechanical displacement detection method
CN102722748A (en) RFID label with photosensitive device, RFID system and illumination detection method
CN102760222A (en) RFID (Radio Frequency Identification Device) system for measuring mechanical displacement and method for measuring mechanical displacement
CN103455776A (en) Mechanical displacement measurement RFID system and mechanical displacement measurement method thereof
CN102831463A (en) RFID (Radio Frequency Identification Device) label with mechanical displacement detection device, RFID system and mechanical displacement detection method
CN102809583A (en) RFID (Radio Frequency Identification) system of measuring gas concentration and method of measuring gas concentration of RFID system
CN102842015A (en) RFID (radio frequency identification) system for detecting degree of closeness and method for detecting distance between objects
CN102750577A (en) RFID (Radio Frequency Identification Devices) label with proximity sensor, RFID system and method for detecting distance between objects
CN202736099U (en) RFID tag with proximity sensitive device and RFID system with proximity sensitive device
CN102750576A (en) Radio frequency identification device (RFID) label with level-detecting device, RFID system with level-detecting device and level detection method
CN202694397U (en) Radio frequency identification (RFID) label with mechanical shift detection device and RFID system
CN102722747A (en) RFID label with thermosensitive device, RFID system and temperature detection method
CN102819718A (en) RFID (radio frequency identification device) system for measuring magnetic field intensity and method for measuring magnetic field intensity
CN202694361U (en) Radio frequency identification device (RFID) system for measuring mechanical displacement
CN202584180U (en) RFID label with temperature-sensitive device and RFID system
CN102842059A (en) RFID (Radio Frequency Identification devices) tag with approached type sensitive device, RFID system and object distance detecting method
CN102708400A (en) RFID (Radio Frequency Identification Device) label with magnetically susceptible device, RFID system and magnetic field detection method
CN202694396U (en) Radio frequency identification device (RFID) label and RFID system with approaching sensitive device
CN202693069U (en) RFID system used for level measurement
CN202584181U (en) RFID (Radio Frequency Identification) tag with photosensitive device, and RFID system
CN202734752U (en) RFID system for measuring degree of proximity
CN102750570A (en) Radio frequency identification device (RFID) label with stress sensitive device, RFID system and stress detection method
CN103455778A (en) Object position measurement RFID system and object position measurement method thereof
CN202600756U (en) RFID (Radio Frequency Identification Devices) tag with stress sensitive device and RFID system
CN102810181A (en) RFID tag with gas sensitive device, RFID system and gas concentration detecting method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20121219