CN106482851A - There is the temperature sensing device of UHFRFID communication function - Google Patents
There is the temperature sensing device of UHFRFID communication function Download PDFInfo
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- CN106482851A CN106482851A CN201611071271.1A CN201611071271A CN106482851A CN 106482851 A CN106482851 A CN 106482851A CN 201611071271 A CN201611071271 A CN 201611071271A CN 106482851 A CN106482851 A CN 106482851A
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- 238000004891 communication Methods 0.000 title claims abstract description 30
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
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- 230000008878 coupling Effects 0.000 claims description 6
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- 238000012544 monitoring process Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/01—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using semiconducting elements having PN junctions
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2215/00—Details concerning sensor power supply
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Abstract
The present invention provides a kind of temperature sensing device with UHF RFID communication function, and this device includes antenna, radio-frequency (RF) energy modular converter, temperature sensor and radio frequency transmission module.Antenna receives the ultra-high frequency wireless signal in free space.Radio-frequency (RF) energy modular converter is connected with antenna, and ultra-high frequency wireless signal is converted to the signal of telecommunication.Temperature sensor is obtained the temperature of measured object and is electrically connected with radio-frequency (RF) energy modular converter, and radio-frequency (RF) energy modular converter is powered for temperature sensor.Radio frequency transmission module is electrically connected with radio-frequency (RF) energy modular converter, temperature sensor and antenna, and radio-frequency (RF) energy modular converter is radio frequency transmission module for power supply, and the temperature signal that temperature sensor obtains is wirelessly transferred through radio frequency transmission module and antenna.
Description
Technical field
The present invention designs technical field of RFID, and passes particularly to a kind of temperature with UHF RFID communication function
Induction device.
Background technology
RF identification (Radio Frequency Identification, abbreviation RFID) technology is remote using radio frequency
The mode of communication has reached identification, tracking and the management of article.Be widely used at present business automation, traffic management with
And the various fields such as false proof.
Cold Chain Logistics (fresh food, wine etc.) would generally be related in traffic management field；Vaccine, medicine etc.
Environmental sensitivity article monitoring；Valuable cargo in special warehouse, such as grain, the monitoring of potato class equitemperature；Construction material temperature monitoring
Deng these environment will use all temperature sensors.Existing wired temperature sensor is mainly dependence DC source and powers, such as
Battery is relied on to be powered.Battery topmost problem of powering is life-span of battery to be brought a series of maintenance, maintenance issues.
Next to that the safety issue of battery：Existing battery has the problem of poor stability, such as blast, leakage etc., Yi Jiyi
The problem of serial environmental protection.
Additionally, its data of existing temperature sensor is mainly transmitted using wired, common temperature sensor is general
There are four lines, including power line two, data wire two.Wired temperature sensor is possible to cause the short of whole system
The problems such as road, dust stratification, also can bring very big trouble to placement-and-routing simultaneously.
Content of the invention
The present invention has to overcome existing temperature sensor to rely on battery to be powered that battery life is short and safety
The problem of poor performance, provides and a kind of can have UHF RFID communication function using what the high-frequency signal in free space was powered
Temperature sensing device.
To achieve these goals, the present invention provides a kind of temperature sensing device with UHF RFID communication function, should
Device includes antenna, radio-frequency (RF) energy modular converter, temperature sensor and radio frequency transmission module.Antenna receives super in free space
High-frequency wireless signals.Radio-frequency (RF) energy modular converter is connected with antenna, and ultra-high frequency wireless signal is converted to the signal of telecommunication.Temperature passes
Sensor is obtained the temperature of measured object and is electrically connected with radio-frequency (RF) energy modular converter, and radio-frequency (RF) energy modular converter is temperature sensor
Power supply.Radio frequency transmission module is electrically connected with radio-frequency (RF) energy modular converter, temperature sensor and antenna, radio-frequency (RF) energy modulus of conversion
Block is radio frequency transmission module for power supply, and the temperature signal that temperature sensor obtains wirelessly is passed through radio frequency transmission module and antenna
Defeated.
In one embodiment of the invention, temperature sensor includes temperature detecting module, reading circuit, memory module and communication
Control module.Temperature detecting module detects the temperature of measured object.Reading circuit is electrically connected with temperature detecting module, reads temperature inspection
Survey the data of module.Memory module is electrically connected with reading circuit, storage temperature data.Communication control module is electrically connected with radio frequency and passes
Defeated module, memory module and temperature detecting module, communication control module receives the signal of radio frequency transmission module output and to temperature
Detection module is controlled or the temperature data in memory module is transferred to radio frequency transmission module.
In one embodiment of the invention, temperature detecting module includes two current sources related to temperature, one of with
Temperature positive correlation, another is negatively correlated with temperature.
In one embodiment of the invention, reading circuit includes：
The staggered first switch pipe being connected and second switch pipe, in working order in both alternate conduction；
Electric capacity, is connected between first switch pipe and second switch pipe.
In one embodiment of the invention, first switch pipe and second switch pipe are NPN triode, the base of first switch pipe
Pole is connected with the colelctor electrode of second switch pipe, and the base stage of second switch pipe is connected with the colelctor electrode of first switch pipe, electric capacity
It is connected between the emitter stage of first switch pipe and the emitter stage of second switch pipe.
In one embodiment of the invention, electric capacity includes two join end to end the first electric capacity connecing and the second electric capacity.
In one embodiment of the invention, reading circuit also includes the signal being connected with first switch pipe and second switch pipe
Amplifier, signal amplifier includes symmetrically arranged two metal-oxide-semiconductors, and the grid of two metal-oxide-semiconductors is defeated with first switch pipe respectively
Go out end to be connected with the outfan of second switch pipe, the drain electrode of two metal-oxide-semiconductors is grounded through two current sources respectively, two metal-oxide-semiconductors
Source electrode be connected with another current source.
In one embodiment of the invention, that reading circuit also includes being made up of four switching tubes and be connected to power supply and ground
Between rail-to-rail comparator, rail-to-rail comparator by first switch pipe and second switch pipe output signal carried out with the full amplitude of oscillation defeated
Go out.
In one embodiment of the invention, reading circuit also includes compensation circuit, and compensation circuit includes the first compensation pipe and
Two compensate pipe, and first compensates pipe is correspondingly arranged with first switch pipe and second switch pipe respectively with the second compensation pipe, the first compensation
The emitter stage of pipe is connected with the emitter stage of first switch pipe, and first compensates base stage and the grounded collector of pipe, and second compensates pipe
Emitter stage be connected with the emitter stage of second switch pipe, the second compensation base stage of pipe and grounded collector.
In one embodiment of the invention, reading circuit also includes coupling and adjusts circuit, and coupling adjusts circuit and includes by contrary
Two groups of switches that signal controls, two groups of switches are negative by changing first switch pipe, second switch pipe, the first load resistance and second
The position carrying between resistance carries out mismatch regulation, and the first load resistance is connected between first switch pipe and power supply, the second load
Resistance is connected between second switch pipe and power supply.
In sum, what the present invention provided has the temperature sensing device of UHF RFID communication function compared with prior art
There is advantages below：
The ultra-high frequency wireless signal conversion coming from free space that antenna is received by radio-frequency (RF) energy modular converter
For unidirectional current be temperature sensor and radio frequency transmission module is powered, and realizes the self-powered of temperature sensing device.This setting solution
Determined existing temperature sensor because the problem of battery life and safety.Additionally, the data that temperature sensor is detected is same
Can be sent in the form of high frequency radio by radio frequency transmission module, realize being wirelessly transferred of data.Efficiently solve
The problem of existing wired sensor easy short circuit safety difference, greatly simplify placement-and-routing.I.e. the present invention provides one kind passive
Temperature sensor wireless and that there is ultra-high frequency wireless communication function.Meanwhile, peak current pole during the work of this temperature sensing device
Little, reduce the pollution to analog power on piece for the sensing device work, avoid due to mistake in the excessive isolation of transient current simultaneously
Stream protection.
It is that above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly,
And coordinate accompanying drawing, it is described in detail below.
Brief description
Fig. 1 show the principle of the temperature sensing device with UHF RFID communication function of one embodiment of the invention offer
Block diagram.
Fig. 2 show the theory diagram of temperature sensor in Fig. 1.
Fig. 3 show first switch pipe in Fig. 3, second switch pipe, the letter of the first current source, the second current source and electric capacity
Change figure.
Fig. 4 show the detailed schematic diagram of reading circuit.
Fig. 5 show the sequential chart of the electric current flowing through on electric capacity in Fig. 3 and terminal voltage.
Fig. 6 show capacitor discharge time than the curve chart with temperature data.
Fig. 7 show the current curve when temperature sensing device with UHF RFID communication function shown in Fig. 1 works.
Fig. 8 show the enlarged drawing at A in Fig. 7.
Specific embodiment
As depicted in figs. 1 and 2, the present embodiment provide have UHF RFID communication function temperature sensing device antenna 1,
Radio-frequency (RF) energy modular converter 2, temperature sensor 3 and radio frequency transmission module 4.Antenna 1 receives the ultra-high frequency wireless in free space
Signal.Radio-frequency (RF) energy modular converter 2 is connected with antenna 1, and ultra-high frequency wireless signal is converted to the signal of telecommunication.Temperature sensor 3
Obtain the temperature of measured object and be electrically connected with radio-frequency (RF) energy modular converter 2, radio-frequency (RF) energy modular converter 2 supplies for temperature sensor
Electricity.Radio frequency transmission module 4 is electrically connected with radio-frequency (RF) energy modular converter 2, temperature sensor 3 and antenna 1, and radio-frequency (RF) energy is changed
Module 2 is powered for radio frequency transmission module 4, and the temperature signal that temperature sensor 3 obtains is carried out through radio frequency transmission module 4 and antenna 1
It is wirelessly transferred.
In the present embodiment, radio-frequency (RF) energy modular converter 2 is radio frequency-DC converter (RF-DC changer), concrete and
Speech, radio frequency-DC converter is electric capacity and the charge pump construction of diode composition.However, the present invention is to radio frequency-DC converter
Concrete structure be not limited in any way.In other embodiments, radio frequency-DC converter can be formed using metal-oxide-semiconductor.
In the present embodiment, temperature sensor 3 includes temperature detecting module 31, reading circuit 32, memory module 33 and leads to
Letter control module 34.Temperature detecting module 31 detects the temperature of measured object.Reading circuit 32 is electrically connected with temperature detecting module 31,
Read the data of temperature detecting module 31.Memory module 33 is electrically connected with reading circuit 32, storage temperature data.Control on Communication mould
Block 34 is electrically connected with radio frequency transmission module 4, memory module 33 and temperature detecting module 31, and communication control module 34 receives radio frequency and passes
The signal of defeated module 4 output is simultaneously controlled to temperature detecting module 31 or is transferred to the temperature data in memory module 33
Radio frequency transmission module 4.
In the present embodiment, temperature detecting module 31 includes two current sources related to temperature, one of and temperature
The second current source I in positive correlation, such as Fig. 3 and Fig. 42；Another is negatively correlated with temperature, the first current source in such as Fig. 3 and Fig. 4
I1.First current source I1With the second current source I2Can for voltage signal or the current signal audion related to temperature, metal-oxide-semiconductor or
The temperature sensing devices such as diode are formed.In the present embodiment, the first current source I1With the second current source I2It is based on two NPN tri-
Pole pipe produces.
In the present embodiment, as shown in Figure 3 and Figure 4, reading circuit 32 includes the staggered first switch pipe Q being connected1With
Two switching tube Q2And electric capacity CF.In the present embodiment, first switch pipe Q1With second switch pipe Q2It is NPN triode, first
Switching tube Q1Base stage and second switch pipe Q2Colelctor electrode be connected, second switch pipe Q2Base stage and first switch pipe Q1's
Colelctor electrode is connected.First switch pipe Q1With second switch pipe Q2Between form positive feedback effect, in working order in both alternately
Conducting.Electric capacity CFIt is connected to first switch pipe Q1Emitter stage and second switch pipe Q2Emitter stage between.However, the present invention couple
This is not limited in any way.In other embodiments, first switch pipe Q1With second switch pipe Q2It can be metal-oxide-semiconductor.
In the circuit, the first current source I1On the electric current I1 that flows through be the electric current negatively correlated with temperature, the second current source I2
On the electric current I2 that flows through be positively related electric current with temperature, the base emitter of electric current I1 and the NPN triode as temperature sensing device
Pole tension VBEBe directly proportional, I2 with two identical collector current biasing under the NPN triodes as temperature sensing device base stage
Emitter voltage difference DVBEBe directly proportional, and I1+I2 be one with temperature slightly positively related electric current to reduce VBENon-linear
Impact to output, its temperature coefficient is different according to technique difference.
Due in normal operating conditions, first switch pipe Q1With second switch pipe Q2Both alternate conduction, thus in figure electric capacity
CFBy electric current I1 and I2 alternating discharge.According to charge conservation principle, electric current I1, I2 flow through electric capacity CFTime become anti-with its size
The i.e. I1/I2=t of ratioL/tH, tHFor electric current I1 to electric capacity CFDischarge time, tLFor electric current I2 to electric capacity CFDischarge time.Then
Electric capacity CFDischarge time than for tL/tH=I1/I2 ∝ f (VBE/DVBE), according to VBE/DVBERelation and temperature T between is permissible
Obtain temperature T and tL/tHBetween relation curve, linearized after can obtain T=1/ (a+tL/tH), wherein a is linear parameter.
The reading circuit that the present embodiment provides passes through first switch pipe Q1With second switch pipe Q2To form multistable resonance
Device, greatly simplify reading and the connection with other modules of sensor temperature data.Further, for different temperature
Sensor can be calibrated by linear adjustment parameter a.For mating first switch pipe Q1Emitter capacity and second switch
Pipe Q2Emitter capacity, in the present embodiment, electric capacity CFJoin end to end the first electric capacity connecing and the second electric capacity including two.
For improving the precision of signal detection, in the present embodiment, reading circuit also includes and first switch pipe Q1With second
Switching tube Q2The signal amplifier being connected.This signal amplifier is by first switch pipe Q1Collector voltage V1 and second switch
Pipe Q2Collector voltage V2 be amplified.In the present embodiment, signal amplifier includes symmetrically arranged two metal-oxide-semiconductors, point
Wei not the first metal-oxide-semiconductor MP1With the second metal-oxide-semiconductor MP2.First metal-oxide-semiconductor MP1With the second metal-oxide-semiconductor MP2Grid respectively with first switch pipe
Q1Outfan (colelctor electrode) and second switch pipe Q2Outfan (colelctor electrode) be connected (that group that cpb is controlled in the diagram
Switch closure), the first metal-oxide-semiconductor MP1Drain electrode and the first metal-oxide-semiconductor MP2Drain electrode respectively through two current source Ib1, Ib2 is grounded, the
One metal-oxide-semiconductor MP1Source electrode and the second metal-oxide-semiconductor MP2Source electrode respectively through the first load resistance R1With the second load resistance R2With another
Current source Ib0 is connected.
In the present embodiment, reading circuit is also included by four switching tube Mp3、Mp4、Mn1、Mn2(switching tube Mp3、Mp4For
PMOS, switching tube Mn1、Mn2For NMOS tube) form and the rail-to-rail comparator that is connected between power supply and ground, rail-to-rail ratio
Compared with device, the signal of first switch pipe and the output of second switch pipe is exported with the full amplitude of oscillation, that is, be output as VDD (supply voltage)
Or GND ().The amplitude of oscillation refers to the difference of maximum and minima, and this difference means that more greatly the fluctuation of signal is more obvious, also
More it is readily available effective output, be more beneficial for the digital processing of follow-up signal.
Fig. 4 show the circuit diagram of detailed reading circuit, below specific operation principle is illustrated.In figure T0For
Clock signal after processing through rail-to-rail comparator processor.Specifically, in the diagram, if that group being controlled as signal cpb
Switch conduction and first switch pipe Q1 conducting, during second switch pipe Q2 cut-off, electric capacity CFThrough electric current I2 electric discharge, discharge time is tL,
V1 point voltage is VDD- (I1+I1) R1；V2 point voltage is VDD- (I1+I2) R2/ β, and wherein β is the Current amplifier of NPN triode
Multiple.Meanwhile, switching tube Mp1, switching tube Mp2The making an uproar when voltage difference of amplification V1 point and V2 point isolation and amplifier end level conversion
Sound；Switching tube Mp3Cut-off, switching tube Mp4Conducting, switching tube Mn1Conducting, T0Output low level.And work as first switch pipe Q1 cut-off,
Second switch pipe Q2 turns on；Electric capacity CFThrough electric current I1 electric discharge, discharge time is tH, T0Output high level.Therefore, the present embodiment carries
For reading circuit in, T0In the clock signal of output time shared by low level with the time shared by high level than as tL/
tH.According to formula tL/tH∝f(VBE/DVBE) it can be deduced that T0Time shared by low level and high level in the clock signal of output
The shared time is than ∝ f (VBE/DVBE), that is, pass through to detect T0Time shared by low level and high level in the clock signal of output
The shared time is than the temperature that can get object under test.
Because the temperature that sensor is detected can be related to high temperature, first switch pipe Q in the case of a high temperature1And second switch
Pipe Q2It is possible to occur high temperature to leak electricity, high-temperature current leakage can affect electric current I1 and electric current I2, thus affecting detection temperature.For having
Effect avoids the impact of high-temperature current leakage, and in the present embodiment, reading circuit also includes compensation circuit.Compensation circuit includes the first benefit
Repay pipe Q1' and the second compensation pipe Q2', the first compensation pipe Q1' and the second compensation pipe Q2' respectively with first switch pipe Q1And second switch
Pipe Q2It is correspondingly arranged.First compensation pipe Q1' emitter stage and first switch pipe Q1Emitter stage be connected, first compensation pipe Q1'
Base stage and grounded collector；Second compensation pipe Q2' emitter stage and second switch pipe Q2Emitter stage be connected, second compensate pipe
Q2' base stage and grounded collector.First compensation pipe Q can be set in circuit design1' and first switch pipe Q1Same model, second
Compensate pipe Q2' and second switch pipe Q2Same model, you can realize high temperature electric leakage and compensate.However, the present invention is to the first compensation pipe Q1’
With the second compensation pipe Q2' structure be not limited in any way.In other embodiments, the first compensation pipe Q1' and the second compensation pipe Q2’
Can be the diode matching with first switch pipe Q1 and second switch pipe Q2 respectively.Described mate for both in the case of a high temperature
Leakage current be close as far as possible.
In the present embodiment, reading circuit also includes coupling and adjusts circuit, and coupling adjusts circuit and includes by opposite signal (cp
And cpb) control two groups switches, two groups of switches are by changing first switch pipe, second switch pipe, the first load resistance and second
Position between load resistance carries out mismatch regulation, and to reduce due to the resistance in manufacture process, audion aberrations in property causes
Piece and piece between output bias.
In the present embodiment, memory module 33 is depositor, and the temperature data being stored in depositor can increase substantially
The read-write speed of temperature data.However, the present invention is not limited in any way to this.In other embodiments, memorizer 33 is alternatively
Nonvolatile memory.
Further, as shown in Figure 7 and Figure 8, all active devices are controlled operationally due to employing current steer
Size of current, operationally, the current spike of whole device is minimum, effectively reduces the pollution to voltage source on piece for the sensor.
Simultaneously as chip has instantaneous overcurrent to protect, this sensor seldom triggers over-current state.
In sum, the ultra-high frequency wireless coming from free space that antenna is received by radio-frequency (RF) energy modular converter
It is that temperature sensor and radio frequency transmission module carry out self-powered that signal is converted to unidirectional current.This setting solves existing temperature sensing
Device is because the problem of battery life and safety.Additionally, the data that temperature sensor is detected again may be by radio frequency transmission
Module is sent in the form of high frequency radio, realizes being wirelessly transferred of data.Efficiently solve existing wired sensor
The easily poor problem of short circuit safety, greatly simplify placement-and-routing.I.e. the present invention provides a kind of passive and wireless and has hyperfrequency
The temperature sensor of radio communication function.
Further, the temperature signal obtaining is processed using multistable resonator, not only effectively reduce temperature
The complexity of degree sensor, also simplify itself connection and radio-frequency (RF) energy modular converter and radio frequency transmission module between simultaneously.
Meanwhile, during the work of this temperature sensing device, peak current is minimum, reduces the pollution to analog power on piece for the sensing device work,
Avoid due to overcurrent protection in the excessive isolation of transient current simultaneously.
Although the present invention is disclosed above by preferred embodiment, but be not limited to the present invention, any know this skill
Skill person, without departing from the spirit and scope of the present invention, can make a little change and retouching, therefore protection scope of the present invention is worked as
It is defined depending on claims scope required for protection.
Claims (10)
1. a kind of temperature sensing device with UHF RFID communication function is it is characterised in that include：
Antenna, receives the ultra-high frequency wireless signal in free space；
Radio-frequency (RF) energy modular converter, is connected with described antenna, and ultra-high frequency wireless signal is converted to the signal of telecommunication；
Temperature sensor, is obtained the temperature of measured object and is electrically connected with described radio-frequency (RF) energy modular converter, described radio-frequency (RF) energy
Modular converter is powered for temperature sensor；
Radio frequency transmission module, is electrically connected with described radio-frequency (RF) energy modular converter, temperature sensor and antenna, described radio frequency energy
Amount modular converter is radio frequency transmission module for power supply, and the temperature signal that described temperature sensor obtains is through radio frequency transmission module and antenna
It is wirelessly transferred.
2. the temperature sensing device with UHF RFID communication function according to claim 1 is it is characterised in that described temperature
Degree sensor includes：
Temperature detecting module, the temperature of detection measured object；
Reading circuit, is electrically connected with temperature detecting module, reads the data of temperature detecting module；
Memory module, is electrically connected with reading circuit, storage temperature data；
Communication control module, is electrically connected with described radio frequency transmission module, memory module and temperature detecting module, described Control on Communication
Module receives the signal of radio frequency transmission module output and temperature detecting module is controlled or by the temperature in memory module
Data is transferred to radio frequency transmission module.
3. the temperature sensing device with UHF RFID communication function according to claim 2 is it is characterised in that described temperature
Degree detection module includes two current sources related to temperature, one of and temperature positive correlation, and another is negatively correlated with temperature.
4. the temperature sensing device with UHF RFID communication function according to claim 2 is it is characterised in that described reading
Sense circuit includes：
The staggered first switch pipe being connected and second switch pipe, in working order in both alternate conduction；
Electric capacity, is connected between described first switch pipe and second switch pipe.
5. the temperature sensing device with UHF RFID communication function according to claim 4 is it is characterised in that described
One switching tube and second switch pipe are NPN triode, and the base stage of first switch pipe is connected with the colelctor electrode of second switch pipe,
The base stage of second switch pipe is connected with the colelctor electrode of first switch pipe, and capacitance connection is in the emitter stage and second of first switch pipe
Between the emitter stage of switching tube.
6. the temperature sensing device with UHF RFID communication function according to claim 4 is it is characterised in that described electricity
Hold and include two join end to end the first electric capacity connecing and the second electric capacity.
7. the temperature sensing device with UHF RFID communication function according to claim 4 is it is characterised in that described reading
Sense circuit also includes the signal amplifier being connected with first switch pipe and second switch pipe, and described signal amplifier includes symmetrically
Two metal-oxide-semiconductors of setting, the grid of two metal-oxide-semiconductors respectively with the outfan of first switch pipe and the outfan phase of second switch pipe
Connect, the drain electrode of two metal-oxide-semiconductors is grounded through two current sources respectively, and the source electrode of two metal-oxide-semiconductors is connected with another current source.
8. the temperature sensing device with UHF RFID communication function according to claim 4 is it is characterised in that described reading
Sense circuit also includes rail-to-rail comparator that is being made up of and being connected between power supply and ground, rail-to-rail comparator four switching tubes
The signal of first switch pipe and the output of second switch pipe is exported with the full amplitude of oscillation.
9. the temperature sensing device with UHF RFID communication function according to claim 4 is it is characterised in that described reading
Sense circuit also includes compensation circuit, described compensation circuit include the first compensation pipe and second compensate pipe, described first compensate pipe and
Second compensation pipe is correspondingly arranged with first switch pipe and second switch pipe respectively, and the emitter stage of described first compensation pipe is opened with first
The emitter stage closing pipe is connected, and first compensates base stage and the grounded collector of pipe, the emitter stage and second of described second compensation pipe
The emitter stage of switching tube is connected, and second compensates base stage and the grounded collector of pipe.
10. the temperature sensing device with UHF RFID communication function according to claim 4 is it is characterised in that described
Reading circuit also includes coupling and adjusts circuit, and described coupling adjusts circuit and includes being switched by two groups that opposite signal controls, two groups
Switch is lost by changing the position between first switch pipe, second switch pipe, the first load resistance and the second load resistance
Auxiliary tone section, described first load resistance is connected between first switch pipe and power supply, and described second load resistance is connected to second
Between switching tube and power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611071271.1A CN106482851B (en) | 2016-11-29 | 2016-11-29 | Temperature sensing device with UHFRFID communication function |
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| CN201611071271.1A CN106482851B (en) | 2016-11-29 | 2016-11-29 | Temperature sensing device with UHFRFID communication function |
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| CN106482851B CN106482851B (en) | 2023-04-11 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112018513A (en) * | 2020-08-27 | 2020-12-01 | 金华市金东区大堰河农牧场 | Implantable device with improved antenna layout |
| CN112220458A (en) * | 2020-08-27 | 2021-01-15 | 金华市金东区大堰河农牧场 | Implantable sensor device through wireless energy supply |
| CN112649047A (en) * | 2020-12-24 | 2021-04-13 | 福建中电合创电力科技有限公司 | Outdoor high-voltage live display device |
| CN112686350A (en) * | 2021-01-29 | 2021-04-20 | 浙江悦和科技有限公司 | Conveyer belt wireless radio frequency identification device |
| CN113177625A (en) * | 2021-02-04 | 2021-07-27 | 上海爪字物联科技有限公司 | Method for detecting tearing of RFID (radio frequency identification) label and RFID chip |
| CN115655515A (en) * | 2022-12-07 | 2023-01-31 | 四川赛康智能科技股份有限公司 | High-voltage switch cabinet online temperature measurement system based on energy information integrated transmission technology |
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| CN110521082A (en) * | 2017-04-28 | 2019-11-29 | 通用电气健康护理生物科学股份公司 | System and method for enabling disposable wireless sensor by optimization electrical power |
| CN107727266A (en) * | 2017-09-21 | 2018-02-23 | 广东电网有限责任公司惠州供电局 | A kind of MEMS temperature sensor and its switch cubicle temp measuring system |
| CN110870701A (en) * | 2018-08-31 | 2020-03-10 | 青岛海尔智能技术研发有限公司 | Temperature detection device and method, oven, computer equipment and storage medium |
| CN112018513A (en) * | 2020-08-27 | 2020-12-01 | 金华市金东区大堰河农牧场 | Implantable device with improved antenna layout |
| CN112220458A (en) * | 2020-08-27 | 2021-01-15 | 金华市金东区大堰河农牧场 | Implantable sensor device through wireless energy supply |
| CN112649047A (en) * | 2020-12-24 | 2021-04-13 | 福建中电合创电力科技有限公司 | Outdoor high-voltage live display device |
| CN112686350A (en) * | 2021-01-29 | 2021-04-20 | 浙江悦和科技有限公司 | Conveyer belt wireless radio frequency identification device |
| CN113177625A (en) * | 2021-02-04 | 2021-07-27 | 上海爪字物联科技有限公司 | Method for detecting tearing of RFID (radio frequency identification) label and RFID chip |
| CN113177625B (en) * | 2021-02-04 | 2022-01-28 | 上海爪字物联科技有限公司 | Method for detecting tearing of RFID (radio frequency identification) label and RFID chip |
| CN115655515A (en) * | 2022-12-07 | 2023-01-31 | 四川赛康智能科技股份有限公司 | High-voltage switch cabinet online temperature measurement system based on energy information integrated transmission technology |
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