CN206833476U - A kind of pressure sensor module and pressure sensor based on passive RFID technology - Google Patents
A kind of pressure sensor module and pressure sensor based on passive RFID technology Download PDFInfo
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- CN206833476U CN206833476U CN201720672860.9U CN201720672860U CN206833476U CN 206833476 U CN206833476 U CN 206833476U CN 201720672860 U CN201720672860 U CN 201720672860U CN 206833476 U CN206833476 U CN 206833476U
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- 238000005516 engineering process Methods 0.000 title claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 47
- 229910052751 metal Inorganic materials 0.000 claims abstract description 47
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000003044 adaptive effect Effects 0.000 claims description 2
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- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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Abstract
A kind of pressure sensor module and pressure sensor based on passive RFID technology are the utility model is related to, including：Metal polar plate, multiple telescoping shoring columns and electronic tag；The metal polar plate is connected by the telescoping shoring column with the electronic tag；Electronic tag is used for the energy signal for receiving the transmission of radio frequency discrimination RFID read write line, after the energy signal is received, according to the metal polar plate and the position relationship of the electronic tag, feedback signal is produced, the feedback signal is sent to the RFID reader.Pressure sensor module provided by the utility model based on passive RFID technology, the transmission of distant signal can be realized by using RFID technique, increase the transmission range between pressure sensor module and read write line.
Description
Technical field
It the utility model is related to communication technical field, more particularly to a kind of pressure sensor mould based on passive RFID technology
Block and pressure sensor.
Background technology
At present, pressure sensor is widely used in a variety of occasions, such as：The sealed environments such as inside of human body, packaging for foodstuff, high temperature
Hyperbaric environment and high-speed aircraft etc..
Existing pressure sensor, the change of pressure is generally converted into the change of electric capacity using pressure-sensitive capacitance, then read
The energy of inductance capacitance resonant tank is taken to transmit to realize pressure sensing function.For example, LC passive and wireless pressure sensors, are
Most important one kind in passive sensor.LC passive and wireless pressure sensor is typically by a presser sensor electric capacity and one
The LC resonant tanks that inductance coil is formed, inductance coil also take on pressure letter i.e. as the inductance element in LC loops
Number wireless output function.When pressure changes, electric capacity influences the resonant frequency in LC loops with change, and leads to
The mode for crossing inductive passes signal.
But based on this, utility model people of the present utility model has found, of the prior art by way of inductive
The method that signal is passed, transmission range is short, causes the use range of pressure sensor limitation to be present.
The information for being disclosed in the background section is merely intended to increase the understanding to general background of the present utility model, and
It is not construed as recognizing or implies that the information structure has been existing well known to persons skilled in the art in any form
Technology.
Utility model content
Technical problem
In view of this, the technical problems to be solved in the utility model be how to provide it is a kind of based on passive RFID technology
Pressure sensor module and pressure sensor, to solve the problems, such as that existing pressure sensing method transmission range is short.
Solution
To solve above technical problem, the utility model first aspect provides a kind of pressure based on passive RFID technology and passed
Sensor module, including：Metal polar plate, multiple telescoping shoring columns and electronic tag；The metal polar plate passes through described scalable
Support is connected with the electronic tag；Electronic tag is used for the energy signal for receiving the transmission of radio frequency discrimination RFID read write line,
After receiving the energy signal, according to the metal polar plate and the position relationship of the electronic tag, feedback signal is produced,
The feedback signal is sent to the RFID reader.
In a kind of possible implementation, the electronic tag includes label antenna, label chip and bottom plate；It is described
Label antenna is connected with the label chip, and the label antenna and the label chip are separately positioned on the bottom plate；
The metal polar plate is connected by the telescoping shoring column with the bottom plate, and the metal polar plate is put down with the label antenna
Row is set；The label antenna is used for the energy signal for receiving RFID reader transmission, and the energy signal is sent into institute
State label chip；The label antenna is additionally operable in the label chip after the energy signal is received, according to described
The position relationship of metal polar plate and the label antenna, calculates the input impedance of the label antenna；The label chip is connecing
After receiving the energy signal, according to the input impedance of the label antenna, automatic adjusument is carried out, obtains the label core
The input impedance of piece, using the input impedance of the label chip as the feedback signal.
In a kind of possible implementation, the feedback signal is sent into the RFID reader includes：The mark
Label chip sends the feedback signal to the label antenna；The feedback signal is sent to described by the label antenna
RFID reader.
In a kind of possible implementation, the label chip includes capacitor array, the carry out automatic adjusument, bag
Include：The label chip adjusts the capacitor array, makes the input impedance of the label chip and the input of the label antenna
Impedance conjugate impedance match.
In a kind of possible implementation, the bottom plate is metallic plate.
In a kind of possible implementation, the quantity of the telescoping shoring column is two, is separately positioned on the bottom plate
Both ends.
In a kind of possible implementation, the telescopic extensions of the telescoping shoring column are 10~80mm.
In a kind of possible implementation, the label antenna is dipole antenna.
To solve above technical problem, the utility model second aspect provides a kind of pressure based on passive RFID technology and passed
Sensor, including above-mentioned pressure sensor module and RFID reader；The RFID reader is used to produce energy signal simultaneously
The energy signal is sent to the pressure sensor module, the energy signal is used to supply for the pressure sensor module
Electricity；The RFID reader is additionally operable to the feedback signal sent according to the pressure sensor module is received, determines pressure value.
Beneficial effect
Pressure sensor module and pressure sensor provided by the utility model based on passive RFID technology, by described
Metal polar plate is connected by the telescoping shoring column with the electronic tag, and electronic tag is used to receive RFID reader transmission
Energy signal, after the energy signal is received, according to the position relationship of the metal polar plate and the electronic tag,
Feedback signal is produced, the feedback signal is sent to the RFID reader.The utility model embodiment provide based on nothing
The pressure sensor module of source RFID technique, the transmission of distant signal can be realized by using RFID technique, increase pressure
Transmission range between force snesor module and read write line.
According to below with reference to the accompanying drawings to detailed description of illustrative embodiments, further feature of the present utility model and aspect will
It is made apparent from.
Brief description of the drawings
Comprising in the description and the accompanying drawing of a part for constitution instruction and specification together illustrate this practicality newly
Exemplary embodiment, feature and the aspect of type, and for explaining principle of the present utility model.
Fig. 1 shows the structure for the pressure sensor module based on passive RFID technology that the utility model embodiment one provides
Schematic diagram；
Fig. 2 shows the structure for the pressure sensor module based on passive RFID technology that the utility model embodiment two provides
Schematic diagram；
Functional relation between the input impedance of distances and label antenna of the Fig. 3 between metal polar plate and label antenna；
Fig. 4 shows the structural representation for the pressure sensor based on passive RFID technology that the utility model embodiment three provides
Figure.
Embodiment
Below in conjunction with the accompanying drawings, specific embodiment of the present utility model is described in detail, it is to be understood that this practicality
New protection domain is not limited by embodiment.
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, rather than whole embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, is belonged to
The scope of the utility model protection.Explicitly indicated that unless otherwise other, otherwise in entire disclosure and claims, term
" comprising " or its conversion such as "comprising" or " including " etc. will be understood to comprise stated element or part, and simultaneously
Other elements or other parts are not excluded.
Special word " exemplary " is meant " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
In addition, in order to better illustrate the utility model, given in embodiment below numerous specific
Details.It will be appreciated by those skilled in the art that without some details, the utility model can equally be implemented.In some realities
In example, it is not described in detail for method well known to those skilled in the art, means, element, in order to highlight the utility model
Purport.
Embodiment one
Fig. 1 shows the knot for the pressure sensor module 2 based on passive RFID technology that the utility model embodiment one provides
Structure schematic diagram, as shown in figure 1, in the present embodiment, pressure sensor module 2 includes：Metal polar plate 22, multiple telescoping shoring columns 23
And electronic tag 21.
The metal polar plate 22 is connected by the telescoping shoring column 23 with the electronic tag 21.
Electronic tag 21 is used to receive radio frequency identification (English full name：Radio Frequency Identification, contracting
Write：RFID) the energy signal that read write line is sent, after the energy signal is received, according to the metal polar plate 22 and institute
The position relationship of electronic tag 21 is stated, feedback signal is produced, the feedback signal is sent to the RFID reader.
Wherein, electronic tag 21 is the electronic tag 21 of adaptive impedance regulation.The quantity of telescoping shoring column 23 to be multiple,
As long as metal polar plate 22 and electronic tag 21 can be connected, and limit the displacement between metal polar plate 22 and electronic tag 21 i.e.
Can.Telescoping shoring column 23 can be spring.
Specifically, the energy signal that RFID reader is sent is used to power for electronic tag 21, and electronic tag 21 is by connecing
Receive the energy signal and obtain electric energy, according to the distance between the metal polar plate 22 and the electronic tag 21, produce feedback
Signal.
The pressure sensor module 2 based on passive RFID technology that the utility model embodiment provides, passes through the metal
Pole plate 22 is connected by the telescoping shoring column 23 with the electronic tag 21, and electronic tag 21 is used to receive RFID reader
The energy signal of transmission, after the energy signal is received, according to the metal polar plate 22 and the electronic tag 21
Position relationship, feedback signal is produced, the feedback signal is sent to the RFID reader.The utility model embodiment provides
The pressure sensor module 2 based on passive RFID technology, the transmission of distant signal can be realized by using RFID technique,
Increase the transmission range between pressure sensor module 2 and read write line.
Embodiment two
The present embodiment is further limited the structure of electronic tag on the basis of embodiment one.Fig. 2 shows this reality
The structural representation of the pressure sensor module 2 based on passive RFID technology provided with new embodiment two, as shown in Fig. 2
In the present embodiment, electronic tag 21 includes label antenna 212, label chip 211 and bottom plate 213.
The label antenna 212 and the label chip 211 are separately positioned on the bottom plate 213, and the label day
Line 212 is connected with the label chip 211；The metal polar plate 22 passes through the telescoping shoring column 23 and the bottom plate 213
It is connected, and the metal polar plate 22 be arranged in parallel with the label antenna 212.
Wherein, bottom plate 213 can be the plastic plate either plate profile structure of metallic plate or other materials.When bottom plate 213 is
During metal, the using effect of pressure sensor module 2 is more preferable.
In a kind of possible implementation, the quantity of the telescoping shoring column 23 is two, is separately positioned on the bottom
Plate both ends, telescopic extensions are 10~80mm.
The label antenna 212 can be dipole antenna.The label antenna 212 is used to receive RFID reader transmission
Energy signal, and the energy signal is sent to the label chip 211.
The label antenna 212 is additionally operable in the label chip 211 after the energy signal is received, according to institute
The position relationship of metal polar plate 22 and the label antenna 212 is stated, calculates the input impedance of the label antenna 212.
Wherein, the metal polar plate 22 compresses the telescoping shoring column 23, produces downward displacement after being under pressure,
Distance between the label antenna 212 diminishes.Metal polar plate 22 can be equivalent to label day relative to label antenna 212
Line 212 carries out end loading, that is, has been connected electric capacity in the input impedance of label antenna 212.Metal polar plate 22 and label day
The change of the relative distance of line 212 can change the size of loading and change the input impedance of label antenna 212.
The label chip 211 hinders after the energy signal is received according to the input of the label antenna 212
It is anti-, automatic adjusument is carried out, obtains the input impedance of the label chip 211, the input impedance of the label chip 211 is made
For the feedback signal.
In a kind of possible implementation, the label chip 211 includes capacitor array, can enter in the following manner
Row automatic adjusument：The label chip 211 adjusts the capacitor array, makes input impedance and the institute of the label chip 211
State the input impedance conjugate impedance match of label antenna 212.And then the input capacitive reactances of the label chip 211 is obtained, this is defeated
Enter impedance as the feedback signal.
Specifically, the input impedance of the label antenna 212 can be calculated by following steps.
Functional relation between the input impedance of distances and label antenna of the Fig. 3 between metal polar plate and label antenna, such as
Shown in Fig. 3, distance and the input impedance of label antenna 212 between metal polar plate 22 and label antenna 212 are present correspondingly
Relation, the input impedance of label antenna can the approximate equivalent capacitances into capacitor array.
The distance of metal polar plate 22 and label antenna 212 is h, and C is antenna input capacitance (negative value), and functional relation is as follows：
C (pF)=0.015h (mm) -3.409
In the present embodiment, the feedback signal is sent into the RFID reader includes：The label chip 211 is by institute
Feedback signal is stated to send to the label antenna 212；The feedback signal is sent to the RFID and read by the label antenna 212
Write device.Thus, RFID reader can be by the acquisition to the capacitor array capacitance, that is, label chip 211 is defeated
Enter capacitive reactances, realize the acquisition of the input capacitive reactances of passive RFID tag chip 211.
In the present embodiment, the workflow of pressure sensor module 2 is that the deformation effect of ambient pressure or object is in metal
When on pole plate 22, metal polar plate can be caused to be changed with the distance between label antenna 212 or bottom plate 213, so that
The impedance of label antenna 212 changes therewith.For meet and label antenna 212 between impedance matching, impedance self-adaptive it is passive
RFID label chip 211 will automatically adjust it and input capacitive reactances, and the input capacitive reactances data after regulation are passed through into label
Antenna 212 is sent to RFID reader.One-to-one relation be present in the input impedance of metal polar plate 22 and label antenna 212,
And the passive RFID tag chip 211 of impedance self-adaptive will automatically adjust it and input capacitive reactances, that is to say, that act on metal
There is also one-to-one relation for the input capacitive reactances of pressure or deformation and passive RFID tag chip 211 on pole plate 22.
RFID reader is by UHF RFID antennas, in defined working frequency, the input capacitive resistance to passive RFID tag chip 211
Anti- data are obtained in real time, numerically directly reflect the pressure acted on metal polar plate or deformation situation, so as to complete
Sensing function is detected into wireless pressure of the present utility model.
Thus, the pressure sensor module 2 based on passive RFID technology that the utility model embodiment provides, passes through electronics
Label 21 includes label antenna 212, label chip 211 and bottom plate 213.The label antenna 212 and the label chip 211
It is separately positioned on the bottom plate 213, and the label antenna 212 is connected with the label chip 211；The metal polar plate
22 are connected by the telescoping shoring column 23 with the bottom plate 213, and the metal polar plate 22 and the label antenna 212 are flat
Row is set.The pressure sensor module 2 based on passive RFID technology that the utility model embodiment provides, by using RFID skills
Art can realize the transmission of distant signal, increase the transmission range between pressure sensor module 2 and read write line, and by gold
The pressure that category pole plate is subject to corresponds to the input capacitive reactances change of label chip, so as to realize pressure sensing function.
Embodiment three
Fig. 4 shows the structural representation for the pressure sensor based on passive RFID technology that the utility model embodiment three provides
Figure, as shown in figure 4, the pressure sensor, including pressure sensor module 2 described in embodiment one or embodiment two and
RFID reader 1.
The RFID reader 1 is used to produce energy signal and the energy signal is sent into the pressure sensor mould
Block 2, the energy signal are used to power for the pressure sensor module 2.
The RFID reader 1 is additionally operable to the feedback signal sent according to the pressure sensor module 2 is received, it is determined that
Pressure value.
Wherein, the RFID reader of the present embodiment is UHF RFID readers, is provided with UHF RFID antennas.RFID read-write
Device realizes the communication between pressure sensor module 2, UHF RFID readers and pressure sensor by UHF RFID antennas
The working frequency of module 2 is 840MHz-960MHz.
Specifically, due to the metal polar plate 22 and label antenna 212 and passive RFID tag chip of pressure sensor module 2
There is one-to-one relation in 212 input capacitive reactances, namely the pressure acted on metal polar plate 22 or deformation and passive
One-to-one relation be present in the input capacitive reactances of RFID label chip 212.RFID reader by UHF RFID antennas,
Defined working frequency, the input capacitive reactances data to passive RFID tag chip 211 are obtained in real time, numerically directly
Connect and reflect the pressure acted on metal polar plate or deformation situation, so as to complete wireless pressure detection sensing of the present utility model
Function.
The pressure sensor based on passive RFID technology that the utility model embodiment provides, passes through the RFID reader
1 is used to produce energy signal and the energy signal is sent into the pressure sensor module 2, and the energy signal is for being
The pressure sensor module 2 is powered.The RFID reader 1 is additionally operable to send out according to receiving the pressure sensor module 2
The feedback signal sent, determines pressure value, can be realized between RFID reader 1 and pressure sensor module 2 using RFID technique
The transmission of distant signal, increases the transmission range between pressure sensor module 2 and RFID reader 1, and by metal pole
The pressure that plate is subject to corresponds to the input capacitive reactances change of label chip, so as to realize pressure sensing function.
The foregoing description to specific illustrative embodiment of the present utility model is to illustrate and the purpose of illustration.These
Description is not wishing to for the utility model to be defined to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can carry out
It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explain certain principles of the present utility model
And its practical application, so that those skilled in the art can realize and utilize a variety of examples of the present utility model
Property embodiment and various chooses and changes.The scope of the utility model is intended to by claims and its waits similar shape
Formula is limited.
Device embodiment described above is only schematical, wherein the unit illustrated as separating component can
To be or may not be physically separate, it can be as the part that unit is shown or may not be physics list
Member, you can with positioned at a place, or can also be distributed on multiple NEs.It can be selected according to the actual needs
In some or all of module realize the purpose of this embodiment scheme.Those of ordinary skill in the art are not paying creativeness
Work in the case of, you can to understand and implement.
Claims (9)
- A kind of 1. pressure sensor module based on passive RFID technology, it is characterised in that including：Metal polar plate, multiple stretch Contracting support and electronic tag；The metal polar plate is connected by the telescoping shoring column with the electronic tag；Electronic tag be used for receive radio frequency discrimination RFID read write line transmission energy signal, receive the energy signal it Afterwards, according to the metal polar plate and the position relationship of the electronic tag, feedback signal is produced, the feedback signal is sent to The RFID reader.
- 2. pressure sensor module according to claim 1, it is characterised in that the electronic tag include label antenna, Label chip and bottom plate；The label antenna is connected with the label chip, and the label antenna and the label chip are separately positioned on described On bottom plate；The metal polar plate is connected by the telescoping shoring column with the bottom plate, and the metal polar plate and the mark Antenna parallel is signed to set；The label antenna is used for the energy signal for receiving RFID reader transmission, and the energy signal is sent into the mark Sign chip；The label antenna is additionally operable in the label chip after the energy signal is received, according to the metal polar plate With the position relationship of the label antenna, the input impedance of the label antenna is calculated；The label chip, according to the input impedance of the label antenna, is carried out adaptive after the energy signal is received It should adjust, obtain the input impedance of the label chip, using the input impedance of the label chip as the feedback signal.
- 3. pressure sensor module according to claim 2, it is characterised in that be sent to the feedback signal described RFID reader includes：The label chip sends the feedback signal to the label antenna；The feedback signal is sent to the RFID reader by the label antenna.
- 4. pressure sensor module according to claim 2, it is characterised in that the label chip includes capacitor array, The carry out automatic adjusument, including：The label chip adjusts the capacitor array, makes the input impedance of the label chip and the input of the label antenna Impedance conjugate impedance match.
- 5. pressure sensor module according to claim 2, it is characterised in that the bottom plate is metallic plate.
- 6. the pressure sensor module according to claim 2 or 5, it is characterised in that the quantity of the telescoping shoring column is Two, it is separately positioned on the bottom plate both ends.
- 7. pressure sensor module according to claim 6, it is characterised in that the telescopic extensions of the telescoping shoring column are 10~80mm.
- 8. pressure sensor module according to claim 1, it is characterised in that the label antenna is dipole antenna.
- 9. a kind of pressure sensor based on passive RFID technology, including the pressure sensor described in claim any one of 1-8 Module and RFID reader；The RFID reader is used to produce energy signal and the energy signal is sent into the pressure sensor module, institute State energy signal and be used to be pressure sensor module power supply；The RFID reader is additionally operable to the feedback signal sent according to the pressure sensor module is received, determines pressure Value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720672860.9U CN206833476U (en) | 2017-06-12 | 2017-06-12 | A kind of pressure sensor module and pressure sensor based on passive RFID technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720672860.9U CN206833476U (en) | 2017-06-12 | 2017-06-12 | A kind of pressure sensor module and pressure sensor based on passive RFID technology |
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| CN206833476U true CN206833476U (en) | 2018-01-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107016426A (en) * | 2017-06-12 | 2017-08-04 | 北京智芯微电子科技有限公司 | A kind of pressure sensor module and pressure sensor based on passive RFID technology |
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2017
- 2017-06-12 CN CN201720672860.9U patent/CN206833476U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107016426A (en) * | 2017-06-12 | 2017-08-04 | 北京智芯微电子科技有限公司 | A kind of pressure sensor module and pressure sensor based on passive RFID technology |
| CN107016426B (en) * | 2017-06-12 | 2023-09-19 | 北京智芯微电子科技有限公司 | Pressure sensor module and pressure sensor based on passive RFID technique |
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