CN209673250U - A kind of passive and wireless temperature transducer - Google Patents
A kind of passive and wireless temperature transducer Download PDFInfo
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- CN209673250U CN209673250U CN201920441138.3U CN201920441138U CN209673250U CN 209673250 U CN209673250 U CN 209673250U CN 201920441138 U CN201920441138 U CN 201920441138U CN 209673250 U CN209673250 U CN 209673250U
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Abstract
The utility model relates to a kind of passive and wireless temperature transducers, including installation shell and the PCB circuit board being laid on installation shell, the PCB circuit board is equipped with and takes electric current transformer, rectification circuit, accumulator, voltage regulator circuit, Power Management Unit, wireless microcontroller chip, thermometric chip, protect circuit and antenna, take electric current transformer, rectification circuit, accumulator, voltage regulator circuit, Power Management Unit and wireless microcontroller chip are sequentially connected and connect, thermometric chip and antenna communication connection wireless microcontroller chip, protect circuit connection rectification circuit.This temperature transducer utilizes efficient mutual inductance power taking technology cooperation super low-power consumption and the hardware configuration of long-life, guarantee its begun in the case where 5A starting work, can high current, big voltage working environment in electromagnetism interference and stably in a long term completion monitoring temperature task.
Description
Technical field
The utility model relates to power automation primary equipment temperature detection technical fields, more particularly to one kind to be used for power transformation
The passive and wireless temperature transducer for the high and low voltage switchgear thermometric stood.
Background technique
Modern society is high to the dependence of electric energy, and the bigger area of electricity consumption density is higher thus right to the dependence of electricity
The reliability of power grid power supply unit proposes increasingly higher demands.
The high and low voltage switchgear of substation is one of most important electrical equipment.In equipment During Process of Long-term Operation, switch
The positions such as the electrical connector in cabinet can cause to generate heat due to contact resistance is excessive because of manufacture, transport, the bad and aging of installation, if this
The temperature of a little heating positions is unable to monitor, and cannot be overhauled in time, then be eventually resulted in the generation of fire incident.In recent years, In
A lot of switchgear overheats had occurred for power plant and substation, caused the power outage of fire and large area.These phenomenons are big
It is especially prominent on current switch cabinet such as incoming line cabinet, and influence very big.For the generation for avoiding such accident, install a kind of can supervise immediately
The switchgear temperature measuring equipment for surveying contact temperature rise seems very urgent.
Switchgear temperature measuring equipment can be prevented timely and effectively by the operating condition of electrical connector temperature in monitoring switch cabinet
The fire of switchgear occurs.The running temperature of real-time monitoring capital equipment (especially to provision for sealing inside) key point is grasped
Equipment operation condition finds potential faults, takes measures, avoid accident further expansion, in time to guarantee electric power netting safe running
It is significant.
Switchgear temperature measuring equipment is made of temperature transducer and display, and domestic temperature transducer mainly has at present: electricity
Pond power supply thermometric, electric field induction take electrical measurement temperature, surface acoustic wave thermometric, CT to take the thermometrics mode such as electrical measurement temperature.These thermometric modes are each
There are pros and cons, is not very perfect solution.Wherein working life is short in an environment of high temperature for battery thermometric；Electric field induction takes
Electrical measurement temperature requires have big capacitive energy storage, and the big installation of volume is inconvenient；Surface acoustic wave thermometric needs exposed antenna to obtain energy, In
It is dangerous in this complex environment of switchgear；CT takes electrical measurement temperature, and volume is larger mostly, and it is also inconvenient to install.
Summary of the invention
The purpose of this utility model is to provide it is a kind of it is compact-sized, be easily installed, anti-electromagnetic interference capability is strong, stability
The passive and wireless temperature transducer of high, corrosion-resistant, anti-vibration and the hot alternation of high-low temperature resistant humidity.
To achieve the goals above, the technical solution adopted in the utility model is a kind of passive and wireless temperature transducer, packet
It includes installation shell and is laid in the intracorporal PCB circuit board of mounting shell, the PCB circuit board, which is equipped with, takes electric current transformer, whole
Current circuit, accumulator, voltage regulator circuit, Power Management Unit, wireless microcontroller chip, thermometric chip, protection circuit and day
Line, take electric current transformer, rectification circuit, accumulator, voltage regulator circuit, Power Management Unit and wireless microcontroller chip according to
Secondary to be connected, thermometric chip and antenna communication connection wireless microcontroller chip protect circuit connection rectification circuit.
It is described to take electric current transformer including taking electric mutual inductor and iron core as a kind of improvement of the utility model, it takes
Electric mutual inductor is formed using several circle enamel covered wire coilings, and iron core is formed by stacking using multilayer permalloy steel band, and perm closes
Golden steel band joins end to end after passing through the slot taken among electric mutual inductor, and electric mutual inductor is taken to be serially connected in permalloy steel band
On, take the both ends of electric mutual inductor to be separately connected the input terminal and output end of rectification circuit.When iron-core magnetic induction is to electric current, take
Electric mutual inductor induces voltage from iron core, by after rectification circuit energy stores into accumulator.
As a kind of improvement of the utility model, the rectification circuit includes rectifier diode, and protection circuit includes protection
Diode, the anode of rectifier diode connect the cathode of protection diode as the input terminal of rectification circuit, protection diode
Plus earth, the cathode of rectifier diode take one end of electric mutual inductor as the output end connection of rectification circuit, take electric mutual inductance
The anode of the other end connection rectifier diode of coil.Rectifier diode is by the milliampere for the same frequency for taking electric mutual inductor to induce
It is direct current that the alternating current of rank, which carries out halfwave rectifier,.
As a kind of improvement of the utility model, the accumulator uses tantalum capacitor storage unit, tantalum capacitive energy storage list
Member one end connection rectifier diode cathode, the other end connect protection diode anode, while tantalum capacitor storage unit with
Voltage regulator circuit is connected in parallel, the input terminal of the output end connection Power Management Unit of voltage regulator circuit, the output of Power Management Unit
The power end of end connection wireless microcontroller chip.The direct current of rectification circuit output is to the tantalum capacitor in tantalum capacitor storage unit
Charging energy-storing is carried out, and provides stable operating voltage for late-class circuit by voltage regulator circuit and Power Management Unit.
As a kind of improvement of the utility model, starting current detection unit, starting electricity are additionally provided in the PCB circuit board
Flowing detection unit includes resistor voltage divider circuit, operational amplifier, and resistor voltage divider circuit is connected in parallel with voltage regulator circuit, operation amplifier
The input terminal of device connects resistor voltage divider circuit, and the AD conversion of the output end connection wireless microcontroller chip of operational amplifier is logical
Road.The starting current detection unit combining wireless microcontroller chip can be realized the function of temperature detection switch, i.e., originally
Temperature transducer work switching function, when wireless microcontroller chip according to starting current detection unit transmission come signal inspection
When the voltage value for measuring voltage regulator circuit meets normal working voltage and requires, starting temperature transducer is worked normally, and works as institute
When the voltage value of the voltage regulator circuit detected is required lower than normal working voltage, wireless microcontroller chip does not start wireless transmission
Function, in order to avoid issue wrong data.
As a kind of improvement of the utility model, the tantalum capacitor storage unit is constituted using multiple tantalum capacitor parallel connections, more
A tantalum capacitor parallel connection is capable of increasing the capacity of tantalum capacitor storage unit, and voltage regulator circuit uses TVS zener diode, power management list
Member uses voltage management chip, and the cathode of the plus earth of TVS zener diode, TVS zener diode connects voltage management core
The input terminal of piece, the power end of the output end connection wireless microcontroller chip of voltage management chip.
As a kind of improvement of the utility model, the wireless microcontroller chip uses the low-power consumption of Texas Instruments
Radio frequency microprocessor CC1310.The microprocessor has RF radio-frequency enabled, and power consumption is ultralow.
As a kind of improvement of the utility model, the model TMP02 of the thermometric chip.The thermometric chip of the model
Temperature measurement range is -15 DEG C~+125 DEG C, and temperature detection error is not more than ± 2 DEG C.
As a kind of improvement of the utility model, the DC-DC of the model TLV71727PDQN of the voltage management chip
Power supply chip.The voltage that voltage regulator circuit exports can be converted into the work suitable for wireless microcontroller chip by the power supply chip
Voltage.
As a kind of improvement of the utility model, the wireless telecommunications frequency of the antenna uses 433Mhz.
Compared with the existing technology, the overall construction design of the utility model is ingenious, structurally reasonable stabilization, volume compact, peace
Fill easy to use, this temperature transducer is mutual by taking electric current transformer to carry out the alternating current of electric current transmission node in switchgear
Sense takes electricity, is processed into be sent into accumulator after direct current by rectifier circuit rectifies and carries out power storage, and electric by pressure stabilizing
Road and Power Management Unit are that wireless microcontroller chip and thermometric chip convey stable voltage and current, to guarantee thermometric
The reliability service of sensor.Set starting current detection unit cooperation wireless microcontroller chip use can be realized temperature
The switching function of the function of detection switch, i.e. this temperature transducer work, is effectively ensured this temperature transducer in the case where 5A
It can start to start work.It takes in electric current transformer using the permalloy conduct with high magnetic conductivity and flexible soft magnetic characteristic
Magnetic flux material realizes that low current takes the power supply mode of electricity, can be rapidly reached saturation state, and also prevent overcurrent to subsequent rectification
The impact of circuit, can high current, big voltage working environment in electromagnetism interference and stably in a long term complete monitoring temperature appoint
Business.
Detailed description of the invention
Fig. 1 is the hardware circuit block diagram of the passive and wireless temperature transducer of the utility model embodiment.
Fig. 2 is the circuit diagram of the passive and wireless temperature transducer of the utility model embodiment.
Fig. 3 is that the mounting structure for taking electric current transformer of the passive and wireless temperature transducer of the utility model embodiment shows
It is intended to.
In figure: 1- ideal ac current source, 2- take electric mutual inductor, 3- rectification circuit, 4- accumulator, 5- pressure stabilizing electricity
Road, 6- Power Management Unit, 7- resistor voltage divider circuit, 8- operational amplifier, 9- thermometric chip, 10- wireless microcontroller core
Piece, 11- antenna, 12- protect circuit, 13- starting current detection unit, and 14- installs shell, 15-PCB wiring board, 16- coil bone
Frame, 17- iron core, 18- buckle.
Specific embodiment
In order to deepen to be further described with reference to the accompanying drawing to the utility model to the understanding and cognition of the utility model
And introduction.
As shown in Figure 1, a kind of passive and wireless temperature transducer, including installation shell 14 and is laid in installation shell 14
PCB wiring board 15, the PCB circuit board 15 are equipped with and take electric current transformer, rectification circuit 3, accumulator 4, voltage regulator circuit
5, Power Management Unit 6, wireless microcontroller chip 10, thermometric chip 9, protection circuit 12 and antenna 11, take electric Current Mutual Inductance
Device, rectification circuit 3, accumulator 4, voltage regulator circuit 5, Power Management Unit 6 and wireless microcontroller chip 10 are sequentially connected and connect,
11 communication connection wireless microcontroller chip 10 of thermometric chip 9 and antenna, protection circuit 12 connect rectification circuit 3.This thermometric passes
Sensor takes electricity by taking electric current transformer to carry out mutual inductance to the alternating current of electric current transmission node in switchgear, passes through rectification circuit
3 rectifications, which are processed into be sent into accumulator 4 after direct current, carries out power storage, and passes through voltage regulator circuit 5 and Power Management Unit 6
Stable voltage and current is conveyed for wireless microcontroller chip 10 and thermometric chip 9, to guarantee the reliable of temperature transducer
Operation.The antenna 11 of this temperature transducer is wireless communication antenna 11, transmits wirelessly temperature measurement data by antenna 11, does not have to cloth
Line will not cause to hinder to switch cabinet other component in this way.
In addition, being additionally provided with starting current detection unit 13 in the PCB circuit board 15, starting current detection unit 13 includes
Resistor voltage divider circuit 7, operational amplifier 8, resistor voltage divider circuit 7 are connected in parallel with voltage regulator circuit 5, the input of operational amplifier 8
End connection resistor voltage divider circuit 7, the AD conversion channel of the output end connection wireless microcontroller chip 10 of operational amplifier 8.Institute
The 13 combining wireless microcontroller chip 10 of starting current detection unit stated can be realized the function of temperature detection switch, i.e. this survey
Temperature sensor work switching function, when wireless microcontroller chip 10 according to starting current detection unit 13 transmit come signal
When detecting that the voltage value of voltage regulator circuit 5 meets normal working voltage requirement, starting temperature transducer is worked normally, and works as
When the voltage value of detected voltage regulator circuit 5 is required lower than normal working voltage, wireless microcontroller chip 10 does not start nothing
Line emission function, in order to avoid issue wrong data.Pass through the hard of 13 combining wireless microcontroller chip 10 of starting current detection unit
The design of part structure can effectively ensure that this temperature transducer can start to start work in the case where 5A.
Specifically, as shown in figure 3, it is described take electric current transformer include take electric mutual inductor 2 and iron core 17, take electric mutual inductance
Coil 2 is formed using the very thin enamel covered wire coiling of 4000 circles, specifically electric mutual inductor 2 can will be taken to be wound on coil rack 16
On, take the whole size of electric mutual inductor 2 to be maintained within 20mm*20mm*5mm (long * wide * is thick), iron core 17 is super using multilayer
Thin permalloy steel band is formed by stacking, and forms the elongate in shape of 350mm*10mm*0.4mm (long * wide * is thick), the slope after overlapping
Its head and the tail is not connected by alloyed steel strip after passing through the slot among coil rack 16 by buckle 18, takes electric mutual inductor 2
On permalloy steel band after being serially connected in overlapping by coil rack 16, electric mutual inductor and coil rack 16 is taken to be set to installation
Inside shell 14, it is sheathed on 17 part of iron core in coil rack 16 and is set to inside installation shell 14, remainder is exposed to peace
It fills outside shell 14, can effectively reduce the volume of temperature transducer in this way, and due to the flexibility of 17 material of iron core, be also convenient for
Installation.Permalloy be it is a kind of compared with the iron-nickel alloy for having higher magnetic conductivity under low-intensity magnetic field, be not easy to get rusty, flexibility it is high,
These characteristics ensure that take electric current transformer at low currents take electrical efficiency.Coil rack 16 is welded on PCB plate, is taken
The both ends of electric mutual inductor 2 are separately connected the input terminal and output end of rectification circuit 3, when ideal ac current source 1 has electric current stream
Out-of-date, 17 magnetic induction of iron core goes out the milliampere level currents of same frequency, and then electric mutual inductor 2 is taken to induce electricity from iron core 17
Pressure, by after rectification circuit 3 energy stores into accumulator 4.
Further, as shown in Fig. 2, the rectification circuit 3 includes rectifier diode, protection circuit 12 includes two poles of protection
Pipe, the anode of rectifier diode connect the cathode of protection diode, the anode of protection diode as the input terminal of rectification circuit 3
Ground connection, the cathode of rectifier diode take one end of electric mutual inductor 2 as the output end connection of rectification circuit 3, take electric mutual inductance line
The anode of the other end connection rectifier diode of circle 2.Rectifier diode is by the milliampere for the same frequency for taking electric mutual inductor 2 to induce
It is direct current that the alternating current of rank, which carries out halfwave rectifier,.Protection diode is to prevent backward voltage from impacting, and plays guarantor to accumulator 4
Shield effect.
Further, the accumulator 4 uses tantalum capacitor storage unit, and one end connection of tantalum capacitor storage unit is whole
The cathode of diode is flowed, the other end connects the anode of protection diode, while tantalum capacitor storage unit is in parallel with voltage regulator circuit 5 even
It connects, the input terminal of the output end connection Power Management Unit 6 of voltage regulator circuit 5, the output end connection of Power Management Unit 6 is wireless micro-
The power end of controller chip 10.The direct current that rectification circuit 3 exports charges to the tantalum capacitor in tantalum capacitor storage unit
Energy storage, and stable operating voltage is provided for late-class circuit by voltage regulator circuit 5 and Power Management Unit 6.
Preferably, the tantalum capacitor storage unit is constituted using multiple tantalum capacitor parallel connections, and multiple tantalum capacitor parallel connections can increase
The capacity of big tantalum capacitor storage unit, voltage regulator circuit 5 use TVS zener diode, and Power Management Unit 6 uses voltage management core
Piece, the plus earth of TVS zener diode, the input terminal of the cathode connection voltage management chip of TVS zener diode, voltage
The power end of the output end connection wireless microcontroller chip 10 of managing chip.
It is further preferably that tantalum capacitor storage unit carries out in parallel, pressure stabilizing using 3 6.3V large capacity energy storage tantalum capacitors
Circuit 5 uses unidirectional TVS zener diode, the voltage for exporting tantalum capacitor storage unit by the unidirectional TVS zener diode
Stablize in 5.5V or so, and when the both ends of unidirectional TVS zener diode are by reversed transient overvoltage pulse, it can be with high
High impedance between both ends is become Low ESR by speed, to absorb instantaneous large-current, and by voltage clamping in predetermined value, to have
Component in effect protection circuit 12 is against damages.The DC-DC electricity of the model TLV71727PDQN of the voltage management chip
Source chip.The 5.5V direct current DC-DC that voltage regulator circuit 5 exports can be converted into the DC voltage of 2.7V by the power supply chip, be
The wireless microcontroller chip 10 and thermometric chip 9 of rear class provide operating voltage.
It is further preferably that the resistor voltage divider circuit 7 is using two resistance series connection partial-pressure structures, operational amplifier 8
Input terminal connection between the resistances, resistor voltage divider circuit 7 acquires the pressure drop at tantalum capacitor storage unit both ends, and through operation
Collection voltages are transported to the AD conversion channel of wireless microcontroller chip 10 by amplifier 8, are to monitor the electric current of primary equipment
No this temperature transducer that meets opens the condition of work, to realize the switching function of this temperature transducer work.The present embodiment
Operational amplifier 8 select LM358, have many advantages, such as price is low, voltage range extensively, low power consumption current.
It is further preferably to be taken since this temperature transducer needs to be installed on busbar tie point, cable in switchgear
The electric current of the key such as connector, moving contact, static contact transmits link, and outer dimension requires extremely harshness, volume that need to be maintained at
10mm*24mm*30mm or so, under the volume, the either energy that can store of capacitor or permalloy the sensor energy that takes electricity
Amount, cannot all maintain the consumption of the not electronic hardware of optimised power consumption, therefore the chip of super low-power consumption is selected in hardware design, will
Voltage management chip selects ultra low quiescent current IQ, and quiescent current can be lower than 1uA, wireless microcontroller chip 10 is adopted
With the low-power consumption radio frequency microprocessor CC1310 of Texas Instruments, the microprocessor during idle time can suspend mode, operating power consumption
100uA/MHz can be lower than, dormancy power consumption is then lower, and operation suspension power consumption can be lower than 1uA and support to wake up at once；And micro- place
Reason device also has RF radio-frequency enabled, compact-sized, is conducive to the volume for reducing sensor.In addition, the transmitting-receiving for wireless data
Power consumption is also required to consider, in actual use, by the reception current design of antenna 11 in 3mA, and sends current design lower than 15mA,
Also to shorten the time of wireless receiving and dispatching as far as possible simultaneously.In addition, the work temperature of the components for this temperature transducer hardware configuration
Spend the device of preferred -40 DEG C of technical grade~120 DEG C of range, it will bring guarantor for the functional reliability and long life of sensor
Barrier.
It is further preferably the model TMP02 of the thermometric chip 9, the temperature measurement of the thermometric chip 9 of the model
Range is -15 DEG C~+125 DEG C, and temperature detection error is not more than ± 2 DEG C.Thermometric chip 9 it is electric after to switch in contact
The heating temperature of cabinet electric current transmission link is acquired, and is sent to after wireless microcontroller chip 10 handles, by wireless micro-
Temperature information is sent in monitoring temperature terminal by RF radio-frequency module and external antenna 11 inside controller chip 10, with reality
Now to the at-once monitor of switch in-cabinet temperature.
It is further preferably that the wireless telecommunications frequency of the antenna 11 uses 433Mhz, while in wireless microcontroller
Channel wireless radio multi networking mechanics of communication is used in RF radio-frequency module inside chip 10, to guarantee not do mutually between wireless telecommunications
It disturbs, and reduces wireless data transmission packet loss, while being carried out wireless communication using antenna 11 and also having prevented high-tension apparatus and low pressure
The Insulation Problems of equipment room.
The temperature transducer that the utility model is proposed is by using the perm with high magnetic conductivity and flexible soft magnetic characteristic
Alloy realizes that low current takes the power supply mode of electricity as magnetic flux material, can be rapidly reached saturation state, and also prevent overcurrent pair
The impact of subsequent rectification circuit 3, can high current, big voltage working environment in electromagnetism interference and stably in a long term complete temperature
Spend monitor task.In addition, this temperature transducer is small in size, and because of the physical characteristic of material softness, make its installation site and peace
Dress mode has diversity, easy for installation simple, is particularly suitable for inside switch cabinet critical current transmission link such as busbar and connects
The temperature monitoring of the positions such as point, cable bond head, moving contact, static contact.
Technological means disclosed in the utility model is not limited only to technological means disclosed in above embodiment, also
Including technical solution consisting of any combination of the above technical features.It should be pointed out that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the protection scope of the utility model.
Claims (10)
1. a kind of passive and wireless temperature transducer, it is characterised in that: including installation shell and the PCB line being laid on installation shell
Road plate, the PCB circuit board are equipped with and take electric current transformer, rectification circuit, accumulator, voltage regulator circuit, power management list
Member, wireless microcontroller chip, thermometric chip, protection circuit and antenna, take electric current transformer, rectification circuit, accumulator,
Voltage regulator circuit, Power Management Unit and wireless microcontroller chip are sequentially connected and connect, and thermometric chip and antenna communication connection are wireless
Microcontroller chip protects circuit connection rectification circuit.
2. a kind of passive and wireless temperature transducer as described in claim 1, which is characterized in that described to take electric current transformer packet
It includes and takes electric mutual inductor and iron core, electric mutual inductor is taken to form using several circle enamel covered wire coilings, iron core uses multilayer perm
Alloyed steel strip is formed by stacking, and permalloy steel band joins end to end after passing through the slot taken among electric mutual inductor, takes electric mutual
Coil tandem is felt on permalloy steel band, and the both ends of electric mutual inductor is taken to be separately connected input terminal and the output of rectification circuit
End.
3. a kind of passive and wireless temperature transducer as claimed in claim 2, which is characterized in that the rectification circuit includes rectification
Diode, protection circuit include protection diode, input terminal connection protection two of the anode of rectifier diode as rectification circuit
The cathode of the cathode of pole pipe, the plus earth of protection diode, rectifier diode takes electricity as the output end connection of rectification circuit
One end of mutual inductor takes the other end of electric mutual inductor to connect the anode of rectifier diode.
4. a kind of passive and wireless temperature transducer as claimed in claim 3, which is characterized in that the accumulator is using tantalum electricity
Hold energy-storage units, the cathode of one end connection rectifier diode of tantalum capacitor storage unit, the other end is connecting protection diode just
Pole, while tantalum capacitor storage unit is connected in parallel with voltage regulator circuit, the output end of voltage regulator circuit connects the defeated of Power Management Unit
Enter end, the power end of the output end connection wireless microcontroller chip of Power Management Unit.
5. a kind of passive and wireless temperature transducer as claimed in claim 4, which is characterized in that the tantalum capacitor storage unit is adopted
It being constituted with multiple tantalum capacitor parallel connections, voltage regulator circuit uses TVS zener diode, and Power Management Unit uses voltage management chip,
The plus earth of TVS zener diode, the input terminal of the cathode connection voltage management chip of TVS zener diode, voltage management
The power end of the output end connection wireless microcontroller chip of chip.
6. a kind of passive and wireless temperature transducer as claimed in claim 5, which is characterized in that the type of the voltage management chip
Number be TLV71727PDQN DC-DC power source chip.
7. a kind of passive and wireless temperature transducer as claimed in any one of claims 1 to 6, which is characterized in that the PCB route
Starting current detection unit is additionally provided on plate, starting current detection unit includes resistor voltage divider circuit, operational amplifier, resistance point
Volt circuit is connected in parallel with voltage regulator circuit, and the input terminal of operational amplifier connects resistor voltage divider circuit, the output of operational amplifier
The AD conversion channel of end connection wireless microcontroller chip.
8. a kind of passive and wireless temperature transducer as claimed in claim 7, which is characterized in that the wireless microcontroller chip
Using the low-power consumption radio frequency microprocessor CC1310 of Texas Instruments.
9. a kind of passive and wireless temperature transducer as claimed in claim 8, which is characterized in that the model of the thermometric chip
TMP02。
10. a kind of passive and wireless temperature transducer as claimed in claim 9, which is characterized in that the communication frequency of the antenna
Using 433MhZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920441138.3U CN209673250U (en) | 2019-04-02 | 2019-04-02 | A kind of passive and wireless temperature transducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920441138.3U CN209673250U (en) | 2019-04-02 | 2019-04-02 | A kind of passive and wireless temperature transducer |
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| Publication Number | Publication Date |
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| CN209673250U true CN209673250U (en) | 2019-11-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111147264A (en) * | 2019-12-23 | 2020-05-12 | 上海申矽凌微电子科技有限公司 | Two-wire sensor communication device and method |
| CN111864908A (en) * | 2020-08-06 | 2020-10-30 | 广东电网有限责任公司佛山供电局 | Monitoring system of key equipment of power distribution network |
| CN112350450A (en) * | 2020-10-28 | 2021-02-09 | 上海明华电力科技有限公司 | Passive wireless sensor gets electric circuit |
-
2019
- 2019-04-02 CN CN201920441138.3U patent/CN209673250U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111147264A (en) * | 2019-12-23 | 2020-05-12 | 上海申矽凌微电子科技有限公司 | Two-wire sensor communication device and method |
| CN111864908A (en) * | 2020-08-06 | 2020-10-30 | 广东电网有限责任公司佛山供电局 | Monitoring system of key equipment of power distribution network |
| CN112350450A (en) * | 2020-10-28 | 2021-02-09 | 上海明华电力科技有限公司 | Passive wireless sensor gets electric circuit |
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| GR01 | Patent grant | ||
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Denomination of utility model: A passive wireless temperature sensor Effective date of registration: 20210430 Granted publication date: 20191122 Pledgee: Bank of China Limited Nanjing Chengdong Branch Pledgor: NANJING YADIAN ELECTRIC POWER AUTOMATION Co.,Ltd. Registration number: Y2021980003254 |