CN100578952C - Wireless response device, image forming apparatus, and equipment - Google Patents
Wireless response device, image forming apparatus, and equipment Download PDFInfo
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- CN100578952C CN100578952C CN200610066980A CN200610066980A CN100578952C CN 100578952 C CN100578952 C CN 100578952C CN 200610066980 A CN200610066980 A CN 200610066980A CN 200610066980 A CN200610066980 A CN 200610066980A CN 100578952 C CN100578952 C CN 100578952C
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Abstract
A antenna response device, a image forming devicem and device are provided. A wireless response device comprises an antenna that receives a question signal, an identification signal generating unit that generates a response signal for a question signal received by the antenna, and that operates passively, and an impedance conversion unit provided between the antenna and the identification signal generating unit, whose impedance changes in response to the state of the environment.
Description
Technical field
The present invention relates to wireless responder and image processing system, and the electronic equipment that uses this wireless responder.
Background technology
The state detection sensor that is used for the checkout equipment state is widely used in the electronic equipment such as photocopier and printer.As state detection sensor, for example, use and to utilize electrical short or open circuit (release) comes the switch of detected state, and blocking or transmission by the light Photo Interrupter that comes detected state.For example pass through under the situation of transducer at paper, state detection sensor uses in the application that the binary condition whether paper is passed through detects usually.In this case, electronic equipment carries out the operation control and the status monitoring of electronic equipment by the testing result of transducer according to paper.
The Japan Patent spy opens JP 2004-32052A and discloses a kind of wireless senser (wireless responder), and it detects the open/close state of the ON/OFF part of an equipment.This wireless senser changes the electromagnetic state of equipment near conductor being placed on antenna, thereby detects the open/close state of ON/OFF part.In addition, non-patent literature 1 (people such as L.Reindl, Ultrasonics SymposiumProceedings, Institute of Electrical and Electronics Engineers (IEEE), SAW Devices as Wireless Passive Sensors, 1996, the 363-367 page or leaf) and non-patent literature 2 (people such as F.Schmidt, Ultrasonics SymposiumProceedings, Institute of Electrical and Electronics Engineers (IEEE), Remote Sensing of Physical Parameters By Means of PassiveSurface Acoustic Wave Devices (" ID-Tags "), 1994, the 589-592 page or leaf) in, the wireless senser that uses so-called SAW-ID (surface acoustic wave identification) is disclosed.
In state detection sensor, generally power and the transmission and the reception of signal by wired mode such as switch or Photo Interrupter.When the electrification line, there is such problem: when equipment is in holding state, also will consume electric power, perhaps owing to the noise of sneaking into from power line has caused fault.In addition, also there are the following problems: wiring becomes complicated when using a plurality of state detection sensor in an equipment, and needs many man-hours in manufacturing or maintenance process.In addition, also there are the following problems: in using the connector of so-called lead-free in recent years, these materials have hindered the stable propagation of signal along with the damage of time.
In order to address the above problem, can consider with wireless mode to/from state detection sensor transmission/received signal.Yet, need general Wireless Telecom Equipment inside to have battery and power.Thus, there are the following problems: need sizable work when changing battery, thereby the realization of this principle is difficult.In addition, as disclosed among the JP 2004-32052A, in the system that uses the RFID (radio-frequency (RF) identification) do not need battery, will be used to absorb electromagnetic communication from the RFID reader intercept antenna take near the RFID chip or band from the RFID chip, thereby make the RFID chip to work.This system has utilized following principle: when communication obstruct antenna is removed, because electromagnetic wave arrives the RFID chip,, and be brought to when neighbouring when communication obstruct antenna so the RFID chip carries out work, because electromagnetic wave is intercepted a day line absorption, so the RFID chip does not carry out work.Yet, in order to change signal clearly, need big space to take to communication obstruct antenna near it and it is removed.In this way, there are the following problems for disclosed technology among the JP 2004-32052A: for example, it can not pass through transducer as paper as the state detection sensor that is provided with in little space.In addition, the problem that disclosed wireless senser exists in the non-patent literature 1 and 2 is that they have the structure that is exclusively used in the SAW device, the RFID chip that this SAW device and semiconductor form is (referring to Figure 11 of non-patent literature 1, and Fig. 6 of non-patent literature 2) compare, its shortcoming is to handle a large amount of ID.In addition, during disclosed contact-making switch, there are the following problems in using non-patent literature 2: according to the layout of SAW reflector, useless noise since the appearance of vibrating produce.In addition, when being disposed in the non-patent literature 2 on the disclosed reflector as the transducer of variableimpedance, need to measure changes in amplitude from the signal of reflector.Therefore, the problem of signal strength signal intensity limited frequency range has appearred how this technology being applied to.
Summary of the invention
The present invention considers above situation and makes that it provides a kind of state detection sensor that complicated wiring can be used that need not to carry out.In addition, the present invention also provides a kind of low noise state detection sensor, and its no seedbed is carried out work and be need not troublesome work such as battery altering.
In order to address the above problem, the invention provides a kind of wireless responder, it comprises: antenna, it receives request signal; The identification signal generating unit, it is with the mode work of not power consumption and produce answer signal at the request signal that antenna was received; And the impedance conversion unit, it is arranged between antenna and the identification signal generating unit, and wherein impedance response in the state of environment and change.
Described wireless responder is exported answer signal with wireless mode, and this answer signal has been indicated the state of environment.Because when setting up answering device, need not to construct holding wire, set up and the man-hour when safeguarding answering device so can reduce.
Description of drawings
Based on the following drawings embodiments of the invention are specifically described, in the accompanying drawings:
Fig. 1 is the block diagram that illustrates according to the functional structure of condition detecting system of the present invention;
Fig. 2 shows the structure according to the condition detecting system 1 of first embodiment;
Fig. 3 shows the structure according to the condition detecting system 2 of second embodiment;
Fig. 4 shows the structure according to the condition detecting system 3 of the 3rd embodiment;
Fig. 5 shows the structure according to the condition detecting system 4 of the 4th embodiment;
Fig. 6 shows the structure according to the condition detecting system 5 of the 5th embodiment;
Fig. 7 a and 7b show condition detecting system 5 employed signals;
Fig. 8 shows the structure according to the image processing system 6 of the 6th embodiment; And
Fig. 9 is the flow chart that the operation of image processing system 6 is shown.
Embodiment
Embodiments of the invention are described below with reference to accompanying drawings.
1, basic structure
Fig. 1 is the block diagram that illustrates according to the basic structure of condition detecting system of the present invention.Condition detecting system according to the present invention comprises transceiver 10 and as the state detection sensor 20 of wireless responder.Transceiver 10 sends to state detection sensor 20 with request signal via antenna 11.In addition, transceiver 10 receives the answer signal that sends from state detection sensor 20 via antenna 11.State detection sensor 20 is to need not the transducer that electric power gets final product work.In other words, state detection sensor 20 is passive sensors.Impedance conversion part 22 will be transformed into impedance variation such as the variation of the ambient condition of external force and light.When the impedance of impedance conversion part 22 owing to ambient condition reduces, thereby when antenna 21 and identification signal generation circuit 23 were in the impedance matching state, identification signal generation part 23 generated answer signal in response to the request signal from transceiver 10.The answer signal that state detection sensor 20 is produced by identification signal generation part 23 via antenna 21 outputs.On the other hand, when the impedance of impedance conversion part 22 state owing to environment increases, thereby antenna 21 and identification signal generation part 23 are in impedance when not matching state, and state detection sensor 20 does not send at the answer signal from the request signal of transceiver 10.In this way, state detection sensor 20 outputs are in response to the answer signal of the state of its environment.
2, first embodiment
Fig. 2 shows the structure according to the condition detecting system 1 of first embodiment of the invention.In condition detecting system 1, variable inductor 222 is as impedance conversion part 22, and SAW-ID label 230 is as identification signal generation part 23.When applying external force, variable inductor 222 makes the impedance of antenna 21 and the impedance phase coupling (below will provide detailed description) of SAW-ID label 230.Under the situation that does not apply external force, antenna 21 is impedance matchings with SAW-ID label 230.SAW-ID label 230 comprises the IDT (interdigital transducer, comb electrode) 231 that is used for the excitating surface sound wave, and the SAW reflector 232 that reflects this surface acoustic wave.IDT 231 and SAW reflector 232 are formed on the piezoelectric substrate 233.In the present embodiment, SAW-ID label 230 for example is designed so that its signal to the 1GHz frequency replys.
As the material of piezoelectric substrate 233, for example can use following material: (1) oxide, as SiO
2, SrTiO
3, BaTiO
3, BaZrO
3, LaAlO
3, ZrO
2, Y
2O38%-ZrO
2, MgO, MgAl
2O
4, LiNbO
3, LiTaO
3, Al
2O
3Or ZnO; (2) so-called ABO
3Perovskite material is as BaTiO
3, PbTiO
3, Pb
1-xLa
x(ZryTi
1-y)
1-x/4O
3(, being so-called PZT, PLT, PLZT) according to the value of x and y; (3) quadrangle (tetragonal), rhombus or class cube material are as KNbO
3(4) ferroelectric material of class ilmenite structure is with LiNbO
3, LiTaO
3Deng for representative; (5) tungsten bronze type structure material is as Sr
xBa
1-xNb
2O
6And Pb
xBa
1-xNb
2O
6(6) relaxant (relaxer) ferromagnetic material is as Bi
4Ti
3O
12, Pb
2KNb
5O
15, K
3Li
2Nb
5O
15, Pb (Zn
1/3Nb
2/3) O
3, Pb (Mg
1/3Nb
2/3) O
3, Pb (Ni
1/3Nb
2/3) O
3, Pb (In
1/3Nb
2/3) O
3, Pb (Sc
1/3Nb
2/3) O
3, Pb (Sc
1/3Na
2/3) O
3And Pb (Cd
1/3Nb
2/3) O
3(7) macromolecular material is as polyvinylidene fluoride (polyvinylidenefluoride PVDF); (8) synthetic material of selecting in the displacement growth (substitutedderivative) by above-mentioned ferroelectric material.
In addition,, can use following material as the material of IDT 231: elemental metals, as Ti, Cr, Cu, W, Ni, Ta, Ga, In, Al, PB, Pt, Au and Ag; Perhaps alloy is as Ti-Al, Al-Cu, Ti-N, Ni-Cr.IDT 231 can be an individual layer, or two-layer or more multi-layered sandwich construction.One deck comprises a kind of metal or alloy.Typically, can be with Au, Ti, W, Al and Cu material as IDT 231.In addition, the thickness of this metal level can be more than or equal to 1nm and less than 10 μ m.
In variable inductor 222, inductance is inserted in the hollow coil (aircore coil) 2221 and changes owing to ferromagnetic excellent 2222.Guide rail 2223 be arranged on hollow coil 2221 near.Guide rail 2223 is fixed on shell (not shown) etc.Guide rail 2223 for example is a cylindrical parts, and its internal diameter is greater than ferromagnetic excellent 2222 external diameter.Ferromagnetic excellent 2222 can slide in guide rail 22223.Near ferromagnetic excellent 2222, be provided with lever 2226.Ferromagnetic excellent 2222 contact with lever 2226 in the position corresponding with the application point of lever 2226.When applying external force in the position corresponding with the point of application of lever 2226, ferromagnetic excellent 2222 move along guide rail 2223, and are inserted in the air core coil 2221.Between guide rail 2223 and ferromagnetic excellent 2222 ledge 2224, be provided with spring 2225.Because the power of spring 2225, under the state that does not apply external force, ferromagnetic excellent 2222 place the outside of hollow coil 2221 with insertion state not.
On the other hand, when when applying external force and insert in the hollow coils 2221 with ferromagnetic excellent 2222, the self-induction of hollow coil changes.For example, when inserted by magnetic permeability be the Ferrite Material (ferrite material) of 4000H/m constitute ferromagnetic rod the time, the self-induction of hollow coil 2221 becomes and is not less than 1O μ H.Thereby, interrupted the impedance matching of antenna 21 with SAW-ID label 230.Particularly, at this moment, the S parameter S of the band pass filter that constitutes by coil and electric capacity
21Be not more than-50dB.The energy that this means the request signal that antenna 21 receives does not nearly all arrive SAW-ID label 230.This means that also the answer signal from SAW-ID label 230 does not nearly all arrive antenna 21.
On the other hand, when making ferromagnetic excellent 2222 to insert in the hollow coils 2221 owing to external force is applied to lever 2226, thereby when making antenna 21 and SAW-ID label become impedance not match, the request signal that antenna 21 is received is not provided for SAW-ID label 230.Therefore, state detection sensor 20 is not exported answer signal.In this way, the answer signal of state detection sensor 20 output is according to having or not of external force and difference.Just, transceiver 10 can be according at the having or not of the answer signal of request signal, and detects having or not the external force of state detection sensor 20.
Condition detecting system 1 can also comprise a plurality of state detection sensors 20, and each all has different time-delays.In this case, transceiver 10 can be specified the state detection sensor 20 that has been applied in external force according to the time-delay of answer signal from a plurality of state detection sensors 20.
Utilize above-mentioned condition detecting system 1, can carry out the detection of external force by wireless mode according to present embodiment.In addition, work is carried out in state detection sensor 20 no seedbeds.Therefore, need not complicated wiring and come installment state detecting sensor 20, thereby can reduce the number in man-hour that is used for installation and maintenance.In addition, state detection sensor 20 can be installed in the position that is difficult to connect up.In addition, because state detection sensor 20 is with the wireless mode output signal, thereby need not to connect the connector of transducer and holding wire.Therefore, can suppress owing to relatively poor connector connects the bad operation that occurs.
In addition, the inductance by suitably designing ferromagnetic excellent 2222 magnetic permeability, hollow coil 2221 and with ferromagnetic excellent 2222 methods of inserting hollow coils 2221 not only can compatible two-value ON/OFF (ON/OFF), can also compatible many-valued, variable amount.When measuring many-valued amount, this many-valued amount of ionization meter of the answer signal that can be received according to transceiver 10.
In the above description, following embodiment has been described, wherein insert in the hollow coil 2221 ferromagnetic excellent 2222, but the structure of variable inductor 2222 has been not limited to this by the external force that is applied to lever 2226.For example, can also be following structure, wherein under the state that does not apply external force, ferromagnetic excellent 2222 owing to the power of spring is inserted in the hollow coil 2221, and makes ferromagnetic excellent 2222 to withdraw from hollow coil 2221 by applying external force.In addition, the value of the value of the self-induction of hollow coil 2221, ferromagnetic excellent 2222 magnetic permeability, the capacitance of capacitor 2227 and signal frequency value only are that the mode with example provides, thereby these values are not limited to the value among this embodiment.In addition, external force is sent to ferromagnetic excellent 2222 method and is not limited to use lever.For example, can also be following structure, wherein transmit external force via being connected to ferromagnetic excellent 2222 arm.
3, second embodiment
Fig. 3 shows the structure according to the condition detecting system 2 of second embodiment of the invention.Condition detecting system 2 is detecting sensor 20 with difference according to the condition detecting system 1 of first embodiment and also comprises another SAW-ID label 240 except that comprising SAW-ID label 230.The structure of SAW-ID label 240 is identical with SAW-ID label 230 basically, that is, it comprises IDT 241, SAW reflector 242 and piezoelectric substrate 243.Yet SAW-ID label 230 is designed to have different time-delays with SAW-ID label 240.
In addition, in condition detecting system 2, use variable inductor 221 to replace variable inductor 222.Variable inductor 221 makes the impedance of antenna 21 and the impedance phase coupling of SAW-ID label 230 when not applying external force, and makes the impedance of antenna 21 and the impedance phase coupling of SAW-ID label 240 when having applied external force.To describe in detail below.
In the present embodiment, when hollow coil 2211 and 2219 be that they are that self-induction is the coil of 4nH when not inserting ferromagnetic excellent 2212 hollow coil.Ferromagnetic excellent 2212 is to be that the Ferrite Material of 4000H/m constitutes by magnetic permeability.Ferromagnetic excellent 2212 the time when inserting, hollow coil 2211 and 2219 inductance become 10 μ H.Inductance 2217 and 2218 electric capacity are 6.3pF.By hollow coil 2211 and the electric capacity 2217 that use has these parameters, having formed centre frequency is the band pass filter of 1GHz.When using the 1GHz signal, antenna 21 and SAW-ID label 240 are impedance matching at hollow coil 2211 during for hollow.When inserting in the hollow coil 2211 with ferromagnetic excellent 2212, antenna 21 and SAW-ID label 240 become impedance and do not match.This also is suitable for for hollow coil 2219 and electric capacity 2218.
When transceiver 10 was not having external force to be applied to send request signal under the state of arm 2216, the request signal that antenna 21 is received was provided for SAW-ID label 230.This request signal is transformed into surface acoustic wave in IDT231.This surface acoustic wave is reflected by SAW reflector 232, and is transformed into the signal of telecommunication in IDT 231.To export from antenna 21 as answer signal through the signal of telecommunication of conversion.This answer signal is the signal of the time-delay of reflection SAW-ID label 230.At this moment, not from SAW-ID label 240 output answer signals.
On the other hand, when transceiver 10 was having external force to be applied to send request signal under the state of arm 2216, the request signal that antenna 21 is received was provided for SAW-ID label 240.SAW-ID label 240 output answer signals.This answer signal is the signal of the time-delay of reflection SAW-ID label 240.At this moment, answer signal is not from 230 outputs of SAW-ID label.
By with upper type, transceiver 10 can detect having or not of external force according to the answer signal from state detection sensor 20.By a plurality of SAW-ID labels are set by this way, when having applied external force and when not applying external force, all detect some in the answer signal.Therefore, condition detecting system 2 is suitable for carrying out state-detection being difficult to differentiate under the noise circumstance of no response state (wherein not having answer signal).
The number of the SAW-ID label that comprises in the condition detecting system 2 is not limited to two; Can also be following structure, wherein condition detecting system 2 has three or more SAW-ID labels.In addition, these SAW-ID labels can be incorporated in the single chip.Just, can on single piezoelectric substrate, form a plurality of IDT and SAW reflector.By using the SAW-ID label of incorporating into by this way in the single chip, can improve and make and assemble the efficient of handling.
4, the 3rd embodiment
Fig. 4 shows the structure according to the condition detecting system 3 of third embodiment of the invention.Condition detecting system 3 is that with difference according to the condition detecting system 1 of first embodiment condition detecting system 3 uses variable capacitors 223 to replace variable inductor 222.Variable capacitor 223 comprises parallel-plate 2231, is connected to the plug 2232 of one of parallel-plate 2231, and the arm 2236 that is used for external force is sent to plug 2232.Near parallel-plate 2231, be provided with guide rail 2233 along plug 2232.Guide rail 2233 is fixed in (not shown)s such as shell.Guide rail 2233 for example is a cylinder part, and its internal diameter is greater than the external diameter of plug 2232.Plug 2232 can slide in guide rail 2233.Spring 2235 is arranged between the ledge 2234 of guide rail 2233 and plug 2232.Because the power of spring 2235, under the state that does not apply external force, the distance between the parallel-plate 2231 is the shortest.
For the impedance that makes antenna 21 and the impedance matching of SAW-ID label 230, insert inductor 2237 abreast with electric capacity.One end ground connection of inductor 2237.In addition, with the plate earthing that is connected to plug 2232 in the parallel-plate 2231.
Parallel-plate 2231 for example under the shortest state (being called " near state ") of the distance between these two plates, has the electric capacity of 5nF, and under the state (being called " released state ") of the distance maximum between these two plates, has the electric capacity of 0.1pF.In addition, inductor 2237 is that inductance is the coil of 2 μ H (microhenry).When using the 1GHz signal, be lower than-50dB near the signal level from antenna 21 to SAW-ID labels 230 under the state.Thus, utilize the parallel-plate 2231 be near state (not applying the state of external force), be not applied in to SAW-ID label 230 from the signal of antenna 21.Under this state, even sent request signal from transceiver 10, SAW-ID label 230 also not output needle to the answer signal of this request signal.
On the other hand, when parallel-plate 2231 owing to having applied external force and be in released state, be sent to SAW-ID label 230 from the signal more than 99% of antenna 21.When under this state when transceiver 10 has sent request signal, SAW-ID label 230 output needles are to the answer signal of this request signal.
Utilize above-mentioned condition detecting system 3, can carry out the detection of external force with wireless mode according to present embodiment.In addition, the electric capacity by suitably designing parallel-plate 2231 and the method for the separation/parallel-plate that furthers, can make this system not only with two-value ON/OFF compatibility, also with many-valued, variable is compatible.
In the above description, such embodiment has been described, wherein parallel-plate 2231 is applied in to the external force of arm 2236 and separates, but the structure of variable capacitor 223 is not limited thereto.For example, can be following structure, wherein, under the state that does not apply external force, parallel-plate 2231 is owing to the power of spring is in released state, and by applying external force, parallel-plate 2231 is near state.In addition, the inductance value and the signal frequency value of the capacitance of parallel-plate 2231, inductor 2237 only are examples, are not limited to these values.
5, the 4th embodiment
Fig. 5 shows the structure according to the condition detecting system 4 of fourth embodiment of the invention.Condition detecting system 4 is to use photoconductive cell 224 to replace variable inductors 222 with difference according to the condition detecting system 1 of first embodiment.Photoconductive cell 224 comprises the synthesized semiconductor of CdS, CdSe, Pbs, InSb etc.Photoconductive cell 224 is devices that conductivity increases when light incident.That is to say, when light incident, the transfer path conducting between antenna 21 and the SAW-ID label 230.Thus, will be sent to SAW-ID label 230 from the signal of antenna 21.When the request signal that sent under this state from transceiver 10,230 outputs of SAW-ID label are for the answer signal of this request signal.
On the other hand, when not having light incident, the transfer path between antenna 21 and the SAW-ID label 230 disconnects.In this case, the signal from antenna 21 is not sent to SAW-ID label 230.Under this state, SAW-ID label 230 does not have the answer signal of output needle to request signal, even sent request signal from transceiver 10, is like this yet.
Utilize above-mentioned condition detecting system 4, can carry out the detection of external force with wireless mode according to present embodiment.In addition, by suitably designing the resistance value of photoconductive cell 224, not only can compatible two-value ON/OFF, can also compatible many-valued, variable amount.For example, when the resistance value of photoconductive cell 224 is high, can use the peripheral circuit such as amplifier as required.
In the present embodiment, illustrated the situation of variable resistance as the impedance conversion unit, wherein the resistance value of impedance conversion unit changes along with exterior light, particularly, such pattern has been described, wherein photoconductive cell is used as variable resistance, but it also can use photoconductive cell variable resistance in addition.For example, can use potentiometer that resistance value changes because of external force as variable resistor.Alternatively, can use the equipment that produces electricity by light or external force, as solar cell or piezoelectric element.
6, the 5th embodiment
Fig. 6 shows the structure according to the condition detecting system 5 of fifth embodiment of the invention.Fig. 7 shows condition detecting system 5 employed signals.Condition detecting system 5 is to use SAW-ID label 250 to substitute SAW-ID label 230 with difference according to the condition detecting system 1 of first embodiment.SAW-ID label 250 comprises two IDT:IDT 251 and IDT 252.IDT 251 is connected respectively to different antenna 211 and 212 with IDT 252.In the present embodiment, each in the antenna 211 and 212 all receives request signal and sends answer signal.Variable inductor 222 is connected in series between IDT 252 and the antenna 212.Variable inductor 222 is impedance conversion unit, and it makes the impedance of IDT 252 and the impedance matching of antenna 212 when applying external force, and the impedance of IDT 252 and the impedance of antenna 212 are not matched.Between antenna 211 and IDT 251, variable inductor is not set.Omitted the detailed structure of variable inductor 222 among Fig. 6, this is because therefore this figure will become complicated, and the structure of variable inductor 222 is with shown in Figure 2 identical.
When variable inductor 222 not being applied external force, the operation of state detection sensor 20 is as follows.When transceiver 10 receives request signal, the request signal excitating surface sound wave in IDT 251 that utilizes antenna 212 to receive.Institute's excited surface sound wave is propagated through piezoelectric substrate 253.Institute's excited surface sound wave of propagating through piezoelectric substrate 253 is reflected in IDT 252, and arrives IDT 251.In IDT 251, surface acoustic wave is transformed into the signal of telecommunication, and via antenna 211 signal S in response
2Output (Fig. 7 b).Fig. 7 B shows the answer signal of exporting from state detection sensor under the state that variable inductor 222 is not applied external force.Shown in Fig. 7 B, at this moment, owing to passing piezoelectric substrate 253, propagates back and forth surface acoustic wave, so at request signal S
1Answer signal S
2Has the corresponding time-delay of length (SAW waveguide) twice with piezoelectric substrate 253.
When variable inductor 222 was applied external force, the operation of state detection sensor 20 was as follows.When transceiver 10 receives request signal, the request signal excitating surface sound wave in IDT251 that utilizes antenna 211 to receive.Institute's excited surface sound wave passes piezoelectric substrate 253 and propagates.In IDT252, be transformed into the signal of telecommunication with passing institute's excited surface sound wave that piezoelectric substrate 253 propagates, and via antenna 212 as answer signal S
1Output.Answer signal S
1A times corresponding (referring to Fig. 7) of time-delay and the length (SAW waveguide) of piezoelectric substrate 253.In addition, because the part surface sound wave is reflected in IDT 252, so, also exported answer signal S from antenna 211 with identical less than the situation that applies external force to variable inductor 222
2(Fig. 7 a).Fig. 7 A shows the answer signal of exporting from state detection sensor under the state that variable inductor 222 has been applied external force.At this moment, except with pass the corresponding answer signal S of surface acoustic wave that the SAW waveguide is propagated back and forth
2Outside, also exported the corresponding answer signal S of surface acoustic wave that passes the SAW waveguide with (unidirectional)
1Answer signal S
1Time-delay and SAW waveguide one times corresponding.
More than illustrate it is the request signal that is received at antenna 211, but similarly, also be applicable to the request signal that antenna 212 is received, from antenna 211 output answer signal S
1, and from antenna 212 output answer signal S
2Therefore, variable inductor 222 not being applied under the state of external force, only exported answer signal S
2, and variable inductance 222 is being applied under the state of external force, except answer signal S
2Outside, also exported answer signal S
1
Utilize above-mentioned condition detecting system 5, can carry out the detection of external force with wireless mode according to present embodiment.In addition, in condition detecting system 5, no matter whether variable inductor 222 is applied external force, always export answer signal S
2Therefore, except whether detection exists the state-detection of external force, can also carry out sensor states detection that damages such as transducer and the temperature detection that changes according to time-delay.In addition, in the present embodiment, replace variable inductor 222, can use other impedance transformation element, as variable capacitor or variable resistance.
7, the 6th embodiment
Fig. 8 shows the structure according to the image processing system 6 of sixth embodiment of the invention.This image processing system 6 for example is the image processing system such as printer or photocopier.Only show the necessary element of following explanation among Fig. 8, as be used to transmit paper delivery roll 71, be used on paper, carrying out transfer roll 72 that image forms and the paper disc 73 that is used to accumulate paper.Image processing system 6 comprises transceiver 10 and a plurality of state detection sensor 20 (in the example shown, being two state detection sensor 20-1 and 20-2).State detection sensor 20 is any sensor among above-mentioned first to the 5th embodiment.Be designed to make them respectively to have different I D (different delayed time) a plurality of state detection sensors 20, therefore can be differentiated mutually.P is provided with a plurality of state detection sensors 20 along paper (print media) transmission path.For example, when use in first to the 3rd embodiment and the 5th embodiment, illustrate external force is had or not the transducer that detects the time, structure can be as follows: wherein on transmission path P lever is set, when paper passes through, external force is applied to state detection sensor 20.Alternatively, during the transducer that has or not of the detection light in using above-mentioned the 4th embodiment, can be following structure: wherein, in transmission path P, light source is set, when paper passes through, intercepts the light that sends from light source.In the present embodiment, state detection sensor 20 is constructed such that output answer signal when proper paper has passed through near state detection sensor 20.
When the answer signal that receives at request signal, transceiver 10 outputs to the answer signal that is received the CPU (CPU, not shown among Fig. 8) of image processing system 6.CPU extracts the ID of state detection sensor 20 by the method such as the time-delay of calculating answer signal from the signal of being exported.CPU judges according to the ID that is extracted which part paper has passed through.When paper did not pass through, state detection sensor 20 was not exported answer signal.
Fig. 9 shows the flow chart of the operation of image processing system 6.CPU makes request signal output (step S11) by control transceiver 10.When detecting an answer signal at this request signal (step S12: be), then CPU extracts ID (step S13) from detected answer signal.When successfully having extracted ID (step S13: be), CPU creates the tabulation of the ID that is extracted, and with this list storage (step S14) in storage area.(step S13: not), CPU judges that ID has taken place detects wrong (step S15), and exports request signal (step S11) once more by control transceiver 10 when ID extracts failure.(step S12: not), then CPU does not judge that paper is not by (step S16) when detecting answer signal at this request signal.By with upper type, when detect paper by or by the time, CPU carries out according to this situation and handles (step S17).Repeat above processing as required.
Can be used for paper shown in Figure 8 by the application outside the transducer according to state detection sensor of the present invention.For example, can also be used for state-detection according to state detection sensor of the present invention such as the moveable part of sorter (sorter) or door open-close part.In this case, according to the mobile status of moveable part, state detection sensor is set in the position that is applied to the external force of state detection sensor (or light) variation.For example, can close that the time can not shine and open the position that the time can shine when door state detection sensor is set at Dang Men.Thus, open/close state that can detecting gate.Alternatively, next its resistance that changes in response to the ON/OFF of door of potentiometer (potentiometer) can be set.Thus, the state that this system can detecting gate, in other words, that this system can detecting gate opens or close.Again alternatively, the transducer that impedance response changes in ambient condition can be set.Ambient condition for example comprises temperature, power, electric field or magnetic field.The equipment that can use self-operated thermostatic controller or thermistor to change as sense temperature.Can applied stress meter (strain gage) or piezoelectric device as the equipment of the variation of perception.Can use electrostatic capacitance to come the variation of perception electric field.Can use inductance to come the variation in perception magnetic field.
Alternatively, can use the state detection sensor that illustrates among the above embodiment to measure remaining paper amount in the paper disc.Just, the paper amount of accumulating in the foundation paper disc is provided with state detection sensor to the position that state detection sensor applies external force.For example, serviceable condition detection system 1, it is constructed to be inserted in the hollow coil 2221 ferromagnetic excellent 2222 by the weight of the paper that accumulates in the paper disc.In this case, owing to ferromagnetic excellent 2222 amounts (that is, impedance change amount) that are inserted in the hollow coil 2221 change along with the weight (number of paper) of the paper of accumulating in the paper disc, so the intensity of answer signal changes.Just, by this structure, can measure residue paper amount according to the intensity of answer signal.The measurement structure of remaining sheet is not limited thereto in the paper disc; Can adopt the structure of various types, such as the structure that wherein state detection sensor is applied external force according to paper sheet thickness.
Because use the system of above-mentioned state detection sensor 20 not need to arrange holding wire,, this transducer is difficult to arrange in the little space of holding wire so can being arranged on.In addition, in the environment of very noisy, near motor,, compare, can more reduce the detection mistake with the situation of wired connection by suitably choosing the signal frequency that to use.
8, other embodiment
The invention is not restricted to the foregoing description, multiple embodiment through modification can be arranged.
In above embodiment, illustrated and used the pattern of SAW-ID label, but the identification signal generating unit is not limited to the SAW-ID label as the identification signal generating unit.For example, can use RF-ID label, delay line etc.
In addition, in above embodiment, variable inductor, variable capacitor, variable resistance and the electric power maker pattern as the impedance conversion unit of using separately respectively has been described, but can also have constructed the impedance conversion unit by making up them.For example, in condition detecting system shown in Figure 21, can use variable capacitor to replace capacitor 2227.
In addition, in above the 6th embodiment, the pattern of wherein discerning a plurality of SAW-ID labels according to signal lag has been described, but ID identification is not limited to use the structure of time-delay.Can also be such structure, wherein the parameter of capacitor and inductor suitably be designed to make the frequency of utilizing answer signal to carry out ID identification.
In addition, in above embodiment, transceiver 10 has function that sends request signal and the function that receives answer signal, but request signal transmitter and answer signal receiver can be configured to discrete device respectively.
In addition, in the 6th implements, the image processing system that uses according to state detection sensor of the present invention has been described, but can be used for electronic equipment outside the image processing system, perhaps in the plant equipment according to state detection sensor of the present invention.Can control electronic equipment based on output according to state detection sensor of the present invention.For plant equipment, user or device can be monitored the state of the plant equipment at remote location place.In addition, electronic equipment can carry out the FEEDBACK CONTROL of plant equipment based on the output of state detection sensor.
As mentioned above, the invention provides a kind of wireless responder, it comprise the antenna that receives request signal, no seedbed carry out work and at the request signal that antenna receives generate the identification signal generating unit of answer signal and be arranged on antenna and the identification signal generating unit between, the impedance conversion unit that changes in the state of environment of impedance response wherein.
This wireless responder is with the answer signal of wireless mode output indicative for environments state.Because when setting up answering device, need not to construct holding wire, set up and the man-hour when safeguarding answering device so can reduce.
In one embodiment, in this wireless responder, the impedance conversion unit can comprise following any: variable capacitor, utilize this variable capacitor, and the electric capacity of wireless responder changes along with external force; Variable inductor utilizes this variable inductor, and the inductance of wireless responder changes along with external force; And variable resistance, utilizing this variable resistance, the resistance of wireless responder is along with external force or illumination and change.
According to this wireless responder, can detect the variation of external force or illumination with wireless mode.
In another embodiment, this wireless responder can be in response to the impedance variation amount in the impedance conversion unit, the output multi-valued signal.
According to this wireless responder, the output answer signal is as multi-valued signal.Thus, can obtain the more details relevant with the installation site of answering device.
In another embodiment, in these wireless responders, the identification signal generating means can comprise any one in RF-ID label, delay line and the SAW-ID label.
In addition, the invention provides a kind of image processing system, it comprises: image formation unit, and it forms image on recording materials; Recording materials are accumulated the unit, and it is accumulated recording materials; Transmission unit, its with recording materials along accumulate the transmission path of unit from recording materials to image formation unit; Arbitrary above wireless responder, be arranged on as upper/lower positions along transmission path, in this position, because recording materials are by near the wireless responder, change so be applied to the external force of this wireless responder, the light intensity that perhaps incides this answering device changes; And Transmit-Receive Unit, its to/from wireless responder transmission/received signal.
Because utilize wireless responder to come passing through of detection record material,, makes and maintenance cost by this image processing system so can reducing.In addition, though in the space the less position that can't carry out wired installation, also this answering device can be installed.
In addition, the invention provides a kind of image processing system, it comprises: image formation unit, and it forms image on recording materials; Recording materials are accumulated the unit, and it is accumulated recording materials; Transmission unit, its with recording materials along accumulate the transmission path of unit from recording materials to image formation unit; Arbitrary above wireless responder, accumulate at recording materials and to be arranged in the unit as upper/lower positions, in this position, accumulate recording materials amount in the unit according to being accumulated in recording materials, the external force that is applied to this wireless responder changes, and the light intensity that perhaps is incident on this answering device changes; And Transmit-Receive Unit, its to/from wireless responder transmission/received signal.
Because utilize wireless responder to come passing through of detection record material,, makes and maintenance cost by this image processing system so can reducing.In addition, though in the space the less position that can't carry out wired installation, also this answering device can be installed.
In addition, the invention provides a kind of electronic equipment, comprising: moveable part; Arbitrary above wireless responder is arranged on as upper/lower positions, and in this position, according to the mobile status of described moveable part, the external force that is applied to described wireless responder changes, and the light intensity that perhaps is incident on the described answering device changes; And Transmit-Receive Unit, its to/from wireless responder transmission/received signal.
Because utilize wireless responder to come passing through of detection record medium,, makes and maintenance cost by this electronic equipment so can reducing.In addition, though in the space the less position that can't carry out wired installation, also this answering device can be installed.
The above explanation of the embodiment of the invention just is used for illustration and illustrative purposes.Above stated specification be not intended to limit of the present invention or be limited in disclosed precise forms.Clearly, for a person skilled in the art, many modifications and modification are conspicuous.Embodiment selected and that describe is in order to explain principle of the present invention and practical application thereof best, thereby makes others skilled in the art understand various embodiment of the present invention and various modified example thereof, uses to be suitable for specific expection.Should be appreciated that scope of the present invention is limited by following claim and their equivalent.
The No.2005-366834's that the Japanese patent application No.2005-166055 that on June 15th, 2005 submitted to and on December 20th, 2005 submit to is whole open, comprises that specification, claims, accompanying drawing and summary all are incorporated in herein by reference.
Claims (7)
1, a kind of wireless responder, this wireless responder comprises:
First antenna, it receives request signal;
Second antenna, it receives described request signal;
Substrate, its transmitting signal;
The first identification signal generating unit, it is formed on the described substrate and with described first antenna and links to each other, and it produces first answer signal of the described request signal that is received at described first antenna, and does not have the seedbed and carry out work;
The second identification signal generating unit, it is formed on the described substrate and with described second antenna and links to each other, and it produces second answer signal of the described request signal that is received at described second antenna, and does not have the seedbed and carry out work; And
The impedance conversion unit, it is arranged between described first antenna and the described first identification signal generating unit, and its impedance response is in the state of environment and change,
Wherein, described first response signal propagates into the described second identification signal generating unit by described substrate from the described first identification signal generating unit, and by described second antenna transmission,
Described second response signal propagates into the described first identification signal generating unit by described substrate from the described second identification signal generating unit, by described first identification signal generating unit reflection, propagate into the described second identification signal generating unit by described substrate from the described first identification signal generating unit, and by described second antenna transmission.
2, wireless responder according to claim 1, wherein said impedance conversion unit comprise in following at least any: variable capacitor, its electric capacity changes along with external force; Variable inductor, its inductance changes along with external force; And variable resistance, its resistance is along with external force or illumination and change.
3, wireless responder according to claim 1, wherein wireless responder is exported multi-valued signal in response to the impedance variation amount in the described impedance conversion unit.
4, wireless responder according to claim 1, wherein said identification signal generating unit comprises any one in SAW-ID label, RF-ID label and the delay line.
5, a kind of image processing system comprises:
Image formation unit, it forms image on recording materials;
Recording materials are accumulated the unit, and it is accumulated described recording materials;
Transmission unit, its with described recording materials along accumulate the transmission path of unit from described recording materials to described image formation unit;
Wireless responder, wherein said wireless responder is along described transmission path setting, and be arranged on as upper/lower positions, in this position, because recording materials are through near the described wireless responder, change so be applied to the external force of described wireless responder, the light intensity that perhaps incides described answering device changes; And
Transmit-Receive Unit, its to/from described wireless responder transmission/received signal,
Wherein said wireless responder comprises:
First antenna, it receives request signal;
Second antenna, it receives described request signal;
Substrate, its transmitting signal;
The first identification signal generating unit, it is formed on the described substrate and with described first antenna and links to each other, and it produces first answer signal of the described request signal that is received at described first antenna, and does not have the seedbed and carry out work;
The second identification signal generating unit, it is formed on the described substrate and with described second antenna and links to each other, and it produces second answer signal of the described request signal that is received at described second antenna, and does not have the seedbed and carry out work; And
The impedance conversion unit, it is arranged between described first antenna and the described first identification signal generating unit, and its impedance response is in the state of environment and change;
Wherein, described first response signal propagates into the described second identification signal generating unit by described substrate from the described first identification signal generating unit, and by described second antenna transmission,
Described second response signal propagates into the described first identification signal generating unit by described substrate from the described second identification signal generating unit, by described first identification signal generating unit reflection, propagate into the described second identification signal generating unit by described substrate from the described first identification signal generating unit, and by described second antenna transmission.
6, a kind of image processing system comprises:
Image formation unit, it forms image on recording materials;
Recording materials are accumulated the unit, and it is accumulated described recording materials;
Transmission unit, its with described recording materials along accumulate the transmission path of unit from described recording materials to described image formation unit;
Wireless responder, wherein said wireless responder is accumulated at described recording materials and is arranged in the unit as upper/lower positions, in this position, accumulate the amount of the recording materials in the unit according to being accumulated in described recording materials, the external force that is applied to described wireless responder changes, and the light intensity that perhaps is incident on the described answering device changes; And
Transmit-Receive Unit, its to/from described wireless responder transmission/received signal,
Wherein said wireless responder comprises:
First antenna, it receives request signal;
Second antenna, it receives described request signal;
Substrate, its transmitting signal;
The first identification signal generating unit, it is formed on the described substrate and with described first antenna and links to each other, and it produces first answer signal of the described request signal that is received at described first antenna, and does not have the seedbed and carry out work;
The second identification signal generating unit, it is formed on the described substrate and with described second antenna and links to each other, and it produces second answer signal of the described request signal that is received at described second antenna, and does not have the seedbed and carry out work; And
The impedance conversion unit, it is arranged between described first antenna and the described first identification signal generating unit, and its impedance response is in the state of environment and change,
Wherein, described first response signal propagates into the described second identification signal generating unit by described substrate from the described first identification signal generating unit, and by described second antenna transmission,
Described second response signal propagates into the described first identification signal generating unit by described substrate from the described second identification signal generating unit, by described first identification signal generating unit reflection, propagate into the described second identification signal generating unit by described substrate from the described first identification signal generating unit, and by described second antenna transmission.
7, a kind of equipment comprises:
Moveable part;
Wireless responder, wherein said wireless responder is arranged on as upper/lower positions, in this position, according to the mobile status of described moveable part, the external force that is applied to described wireless responder changes, and the light intensity that perhaps is incident on the described answering device changes; And
Transmit-Receive Unit, its to/from described wireless responder transmission/received signal,
Wherein said wireless responder comprises:
First antenna, it receives request signal;
Second antenna, it receives described request signal;
Substrate, its transmitting signal;
The first identification signal generating unit, it is formed on the described substrate and with described first antenna and links to each other, and it produces first answer signal of the described request signal that is received at described first antenna, and does not have the seedbed and carry out work;
The second identification signal generating unit, it is formed on the described substrate and with described second antenna and links to each other, and it produces second answer signal of the described request signal that is received at described second antenna, and does not have the seedbed and carry out work; And
The impedance conversion unit, it is arranged between described first antenna and the described first identification signal generating unit, and its impedance response is in the state of environment and change,
Wherein, described first response signal propagates into the described second identification signal generating unit by described substrate from the described first identification signal generating unit, and by described second antenna transmission,
Described second response signal propagates into the described first identification signal generating unit by described substrate from the described second identification signal generating unit, by described first identification signal generating unit reflection, propagate into the described second identification signal generating unit by described substrate from the described first identification signal generating unit, and by described second antenna transmission.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005166055 | 2005-06-06 | ||
| JP2005166055 | 2005-06-06 | ||
| JP2005366834 | 2005-12-20 |
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| CN1878192A CN1878192A (en) | 2006-12-13 |
| CN100578952C true CN100578952C (en) | 2010-01-06 |
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| CN200610066980A Expired - Fee Related CN100578952C (en) | 2005-06-06 | 2006-03-30 | Wireless response device, image forming apparatus, and equipment |
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| US20100225482A1 (en) * | 2007-12-10 | 2010-09-09 | Omron Corporation | Rfid tag, and system and method for detecting change of rfid tag environment |
| WO2011127334A2 (en) * | 2010-04-08 | 2011-10-13 | Access Business Group International Llc | Point of sale inductive systems and methods |
| US8947236B2 (en) * | 2011-01-18 | 2015-02-03 | Avery Dennison Corporation | Sensing properties of a material loading a UHF RFID tag by analysis of the complex reflection backscatter at different frequencies and power levels |
| JP6987579B2 (en) * | 2017-09-21 | 2022-01-05 | ラピスセミコンダクタ株式会社 | Battery unit, battery monitoring system, battery replacement method |
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