CN103269132B - Sensor power supply method and power supply device - Google Patents
Sensor power supply method and power supply device Download PDFInfo
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- CN103269132B CN103269132B CN201310196003.2A CN201310196003A CN103269132B CN 103269132 B CN103269132 B CN 103269132B CN 201310196003 A CN201310196003 A CN 201310196003A CN 103269132 B CN103269132 B CN 103269132B
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Abstract
The invention relates to the technical field of sensor power supply, in particular to a sensor power supply method and a power supply device. The sensor power supply method includes the steps of collecting a wireless radio frequency signal in the working environment of a sensor, carrying out rectification processing on the collected wireless radio frequency signal to obtain a direct current signal, carrying out a boost processing on the direct current signal to obtain output voltage and meanwhile to generate power supply currents, controlling the power supply currents to charge and store electricity energy, and supplying power for the sensor through the charged and stored electricity energy. The sensor power supply device comprises a radio frequency antenna, a radio frequency rectification circuit, a boost circuit, a power management module and an energy storage element. According to the sensor power supply method and the power supply device, the technical problems that when power is supplied to the sensor through a wire, the position of the sensor has to be arranged and power supply circuits have to be laid in advance, and batteries are difficult to replace, and when power is supplied to the sensor through a solar cell panel, the solar cell panel is greatly influenced by season changes and weather conditions and cannot continuously and stably provide voltage needed by operation of the sensor.
Description
Technical field
The present invention relates to sensor power technical field, in particular to sensor power method and electric supply installation.
Background technology
In correlation technique, usually adopt three kinds of modes to sensor power: (1) passes through line powered; (2) powered battery is utilized; (3) powered by solar panel.
But, in correlation technique, certain drawback is all existed to the mode of sensor power.
Such as, adopt wire pair sensor power, need layout sensing station, laying supply line etc. in advance.This kind of supply power mode is generally suitable for sensor installation in newly-built building.For in the outmoded building being unsuitable for rewiring because cannot layout supply line, causing cannot sensor installation.And adopt wire pair sensor power, after the position of transducer, supply line determine installation, the layout increasing new transducer if want or change sensor installation is more difficult.Therefore consider to adopt battery to sensor power.
Utilize battery to sensor power, although the layout of transducer is installed, the increase of transducer reduces and becomes easy, if the number of sensors of installing is more, carrying out changing management to the battery of One's name is legion is a more difficult problem.
If utilize solar panel to power to transducer, the mounting arrangement of transducer, the increase minimizing of transducer become easy, and utilize solar panel to there is not to sensor power the technical problem that electricity uses up needs replacing management.But solar panel is larger by the impact of seasonal variations, weather conditions, the voltage provided needed for working sensor that solar panel can not be continual and steady.
Summary of the invention
The object of the present invention is to provide sensor power method and electric supply installation, to solve the above problems.
Provide a kind of sensor power method in an embodiment of the present invention, comprising: the radio frequency signal in pick-up transducers operational environment;
Rectification process is carried out to the described radio frequency signal gathered, obtains direct current signal;
Boosting process is carried out to described direct current signal, obtains output voltage and produce supply current simultaneously;
Control described supply current charging storage of electrical energy;
Utilize the electric energy of charging storage to sensor power.
A kind of sensor power device, comprising: radio-frequency antenna, radio frequency rectification circuit, booster circuit, power management module and energy-storage travelling wave tube;
Described radio-frequency antenna, for the radio frequency signal in pick-up transducers operational environment;
Described radio frequency rectification circuit, for carrying out rectification process to the described radio frequency signal gathered, obtains direct current signal;
Described booster circuit, for carrying out boosting process to described direct current signal, obtains output voltage and produces supply current simultaneously;
Described power management module, for controlling described supply current to described energy-storage travelling wave tube charge storage electric energy;
Described energy-storage travelling wave tube, the electric energy stored for utilizing charging is to sensor power.
Usually, in the installation environment of transducer, there is the radio frequency signal with electromagnetic energy, such as mobile phone signal, wireless WIFI signal etc.The sensor power method of the above embodiment of the present invention and electric supply installation, the radio frequency signal in pick-up transducers installation environment, utilizes the electromagnetic energy in the radio frequency signal collected to be sensor power.But the radio frequency signal collected is disorderly and unsystematic to be unsuitable for directly by transducer is utilized.
For making the radio frequency signal collected be that sensor power is used, rectification being carried out to the radio frequency signal gathered and obtains direct current signal.The direct current signal utilizing radio frequency signal rectification process to obtain is fainter, therefore carry out boosting process to the direct current signal obtained further to obtain output voltage and produce supply current simultaneously, supply current is utilized to carry out power storage, such as, supply current produces because of the displacement of electric charge, can power storage be realized by the displacement controlling the electric charge forming supply current, utilize the electric energy stored to power to transducer.
The method of supplying power to of the embodiment of the present invention and electric supply installation, by processing to the radio frequency signal in the working sensor environment collected the voltage obtained as sensor power, the electric wire that utilizes overcome in correlation technique needs layout sensing station in advance for sensor power, lay the technical problem of supply line, because the radio frequency signal in working sensor environment generally distributes more stable, there is not the phenomenon used up and be finished, therefore overcome in correlation technique and utilize battery to sensor power, the technical problem of battery altering Comparison of Management difficulty, overcome in correlation technique simultaneously and utilize solar panel to sensor power, solar panel is by seasonal variations, the impact of weather conditions is larger, the technical problem that the voltage needed for working sensor is provided that can not be continual and steady.
Accompanying drawing explanation
Fig. 1 shows the flow chart of the embodiment of the present invention 1 sensor power method;
Fig. 2 shows the flow chart of the embodiment of the present invention 2 sensor power method;
Fig. 3 shows the structural representation of the embodiment of the present invention 3 sensor power device;
Fig. 4 shows the structural representation of the embodiment of the present invention 4 sensor power device;
Fig. 5 shows the circuit diagram of the embodiment of the present invention 5 sensor power device.
Embodiment
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
Embodiment 1
The embodiment of the present invention 1 provides a kind of sensor power method, and as shown in Figure 1, main processing steps comprises:
Step S11: the radio frequency signal in pick-up transducers operational environment;
Step S12: rectification process is carried out to the described radio frequency signal gathered, obtains direct current signal;
Step S13: boosting process is carried out to described direct current signal, obtains output voltage and produce supply current simultaneously;
Step S14: control described supply current charging storage of electrical energy;
Step S15: utilize the electric energy of charging storage to sensor power.
Usually, in the installation environment of transducer, there is the radio frequency signal with electromagnetic energy, such as mobile phone signal, wireless WIFI signal etc.The sensor power method of the present embodiment, the radio frequency signal in pick-up transducers installation environment, utilizes the electromagnetic energy in the radio frequency signal collected to be sensor power.But the radio frequency signal collected is disorderly and unsystematic to be unsuitable for directly by transducer is utilized.
For making the radio frequency signal collected be that sensor power is used, rectification being carried out to the radio frequency signal gathered and obtains direct current signal.The direct current signal utilizing radio frequency signal rectification process to obtain is fainter, therefore carry out boosting process to the direct current signal obtained further to obtain output voltage and produce supply current simultaneously, supply current is utilized to carry out power storage, such as, supply current produces because of the displacement of electric charge, can power storage be realized by the displacement controlling the electric charge forming supply current, utilize the electric energy stored to power to transducer.
The method of supplying power to of the present embodiment, by processing to the radio frequency signal in the working sensor environment collected the voltage obtained as sensor power, overcome in correlation technique and utilize electric wire to need layout sensing station in advance for sensor power, lay the technical problem of supply line, because the radio frequency signal in working sensor environment generally distributes more stable, there is not the phenomenon used up and be finished, therefore overcome in correlation technique and utilize battery to sensor power, the technical problem of battery altering Comparison of Management difficulty, overcome in correlation technique simultaneously and utilize solar panel to sensor power, solar panel is by seasonal variations, the impact of weather conditions is larger, the technical problem that the voltage needed for working sensor is provided that can not be continual and steady.
Embodiment 2
The present embodiment 2 provides a kind of preferred embodiment of sensor power method on the basis of embodiment 1, and as shown in Figure 2, main processing steps comprises:
Step S21: the frequency range in pick-up transducers operational environment is 800MHz ~ 2.4GHz radio frequency signal;
Step S22: rectification process is carried out to the described radio frequency signal gathered, obtains direct current signal;
Step S23: boosting process is carried out to described direct current signal, obtaining magnitude of voltage is that the output voltage of 4.5 ~ 5 volts produces supply current simultaneously;
Step S24: ac filter is carried out to described supply current, obtains drive current;
Step S25: control described drive current charging storage of electrical energy;
Step S26: utilize the electric energy of charging storage to sensor power.
Utilize the electric energy of storage to power to transducer particularly in step S26, comprising:
Detect the magnitude of voltage of the electric energy that charging stores, when the magnitude of voltage of the electric energy of storage is positioned at default safe voltage scope, utilize the electric energy charging and store to sensor power;
During the minimum value of the magnitude of voltage of electric energy that charging stores lower than described safe voltage scope, cut off sensor power;
During the maximum of the magnitude of voltage of electric energy that charging stores higher than described safe voltage scope, the magnitude of voltage of the electric energy that electrical energy discharge charging stored stores to charging is positioned at described safe voltage scope.
Wherein, described safe voltage scope is for being 2.3 volts ~ 5 volts.
Add the ac filter process of the supply current obtained after processing boosting compared with embodiment 1 in the present embodiment, can a-c cycle part effectively in filtering supply current and current ripple, and the load capacity of drive current can be improved.
Embodiment 3
The embodiment of the present invention 3 provides a kind of sensor power device, as shown in Figure 3, mainly comprises: radio-frequency antenna 31, radio frequency rectification circuit 32, booster circuit 33, power management module 34 and energy-storage travelling wave tube 35;
Radio-frequency antenna 31, for the radio frequency signal in pick-up transducers operational environment;
Radio frequency rectification circuit 32, for carrying out rectification process to the described radio frequency signal gathered, obtains direct current signal;
Booster circuit 33, for carrying out boosting process to described direct current signal, obtains output voltage and produces supply current simultaneously;
Power management module 34, for controlling supply current to energy-storage travelling wave tube 35 charge storage electric energy;
Energy-storage travelling wave tube 35, the electric energy stored for utilizing charging is to sensor power.
The sensor power device of the present embodiment can realize the sensor power method of the embodiment of the present invention, the technical problem utilizing line powered configuration, circuit to change inconvenience can be overcome in prior art, overcome in correlation technique simultaneously and utilize powered battery, the technical problem of battery altering management inconvenience, and overcome in correlation technique and utilize solar panel to power, the technical problem that the voltage needed for working sensor is provided that solar panel can not be continual and steady.
Embodiment 4
The embodiment of the present invention 4 provides a kind of preferred embodiment of sensor power device on the basis of embodiment 3, as shown in Figure 4, mainly comprises:
Radio-frequency antenna 41 is 800MHz ~ 2.4GHz radio frequency signal for the frequency range in pick-up transducers operational environment; The radio frequency signal wherein gathered by radio-frequency antenna 41 can produce 300-800pW/cm
2power density.
Because the radio frequency signal that radio-frequency antenna 41 gathers is disorderly and unsystematic, therefore need to carry out rectification process to radio frequency signal.
Particularly, the radio frequency signal that radio-frequency antenna 41 gathers is transferred to radio frequency rectification circuit 42 by low-loss feeder line.
Radio frequency rectification circuit 42, for carrying out rectification process to the described radio frequency signal gathered, obtains direct current signal;
Wherein, the radio frequency signal being transferred to radio frequency rectification circuit 42 by low-loss feeder line is AC signal, and working sensor needs direct current signal, and the radio frequency signal rectification herein gathered by radio-frequency antenna 41 by radio frequency rectification circuit 42 is direct current signal.
Further, the direct current signal that radio frequency rectification circuit 42 exports is fainter, is not enough to for working sensor.Therefore the direct current signal exported by booster circuit 43 radio frequency rectification circuit 42 is also needed to carry out boosting process.
Booster circuit 43, for carrying out boosting process to described direct current signal, obtaining magnitude of voltage is that the output voltage of 4.5 ~ 5 volts produces supply current simultaneously;
After being boosted by booster circuit 43, output voltage is upgraded to 4.5 ~ 5 volts, and booster circuit 43 exports supply current simultaneously.
But still containing alternating component and ripple in the supply current exported, therefore need the alternating component in filtering supply current and ripple, in the sensor power device of therefore the present embodiment, be provided with ac filter circuit 44.
Ac filter circuit 44, for carrying out ac filter to supply current, obtains drive current.
After ac filter by ac filter circuit 44, the alternating component not only in filtering supply current and ripple, and also the load capacity of the drive current that obtains strengthens.
Power management module 45, for controlling described drive current to energy-storage travelling wave tube 46 charge storage electric energy;
Energy-storage travelling wave tube 46, the electric energy stored for utilizing charging is to sensor power.
Particularly, energy-storage travelling wave tube 46 is capacity cell.The electric charge can assembled in drive current by capacity cell realizes the storage of electric energy.And it is long to utilize capacity cell storage of electrical energy to have the life-span, can repeatedly charge, the advantages such as environmental pollution is little.
Energy-storage travelling wave tube 46 comprises the second capacity cell that the first capacity cell that an electric capacity is 450 ~ 500 microfarads and electric capacity are 1 ~ 3.5 farad;
Described first capacity cell and described second capacity cell are all connected by the output of described power management module with described booster circuit.
The model of the boost chip in booster circuit 43 is LTC3588-1.Utilize LTC3588-1 chip as boost chip, boosting efficiency is high, and the rate of pressure rise is fast, and can be boosted by faint direct current signal in very short time is between 4.5 volts to 5 volts.Shown by repetition test, utilize LTC3588-1 chip boosting efficiency can be made to reach 90% ~ 96% as the boost chip of booster circuit.
Embodiment 5
The present embodiment 5 gives the circuit diagram of sensor power device, and as shown in Figure 5, in this circuit diagram, radio-frequency antenna, radio frequency rectification circuit, booster circuit and ac filter circuit are integrated into a power module, the mark namely shown in Fig. 5 has the module of RF_DC.In addition in Fig. 5, energy-storage travelling wave tube comprises the first capacity cell C1 and the second capacity cell C2;
The electric capacity of the first capacity cell C1 wherein selected in Figure 5 is 470 microfarads, and rated voltage is 6.3 volts; The electric capacity of the second capacity cell C2 3 farads, rated voltage is 5.5 volts.
In addition, power management module comprises controller and power control circuit, and Fig. 5 middle controller does not draw, and is power control circuit by the circuit between power module and capacity cell.
Power control circuit comprises low and high level control end and CCO end, circuit switch controller, circuit changing switch Q1 and other balancing component;
Wherein circuit switch controller adopts model to be the field effect transistor of BC847B or model is the field effect transistor of SOT23, and it is the field effect transistor of SOT23 that circuit changing switch Q1 adopts model to be the field effect transistor of BSS84 or model; Other balancing component comprises BAT854CW diode element, BAT854W diode and resistive element.
In Fig. 5, vdd terminal is the voltage output end of the first capacity cell C1.
Described first capacity cell and described second capacity cell are all connected by the output of described power management module with described booster circuit.
By the circuit diagram of the sensor power device shown in Fig. 5, illustrate and how to utilize power management module to control the electric current of power module output to energy-storage travelling wave tube charge storage electric energy.
1) when power management module detects the magnitude of voltage that the first capacity cell C1 exports and vdd voltage value lower than 2.3V, power management module control CCO holds output low level, now circuit changing switch Q1 turns off, and now power module is only to the first capacity cell C1 charging storage of electrical energy.Because the memory capacity of the first capacity cell C1 is smaller, the vdd voltage value on the first capacity cell C1 rises to 2.3V very soon, and transducer is started working.
2) when power management module detects the magnitude of voltage that the first capacity cell C1 exports and vdd voltage value is more than or equal to 3.3V, power management module control CCO holds and exports high level, now circuit changing switch Q1 opens, and power module starts the second capacity cell C2 charging storage of electrical energy.Because the memory capacity of the second capacity cell C2 is large, the speed of voltage rise is slow.Second capacity cell C2 is as main energy-storage travelling wave tube, and electric energy is substantially all stored in the second electric capacity C2.
3) power management module detects that the magnitude of voltage that the first capacity cell C1 exports and vdd voltage value are more than or equal to 3.3V, but during voltage lower than the second capacity cell C2, second capacity cell C2 starts the first capacity cell C1 quick charge, to ensure that the magnitude of voltage that the first capacity cell C1 exports and vdd voltage value are always higher than the minimum voltage 2.3V of working sensor.
4) when power management module detects that the magnitude of voltage that the first capacity cell C1 exports and vdd voltage value are greater than 5V; power management module controls the first capacity cell and discharges; ensure that the magnitude of voltage that the first capacity cell exports remains 5V, to protect the first capacity cell C1 and the second capacity cell C2.
The working sensor method of the embodiment of the present invention and electric supply installation, the radio frequency signal in working sensor environment can be utilized to provide driving power for transducer, and wherein common utilizable radio frequency signal can be the wireless WIFI signal etc. of the mobile phone signal of 900MHz, the mobile phone signal of 1.8GHz and 2.4GHz.
When having stronger radio frequency signal in working sensor environment, to utilize sensor power method of the present invention and electric supply installation that radio frequency signal can be utilized to obtain average current value be the direct current of 10 ~ 15 microamperes is sensor power.
Wherein sensor power method of the present invention and electric supply installation are mainly the sensor power than lower power consumption, such as wireless human body sensor, wireless illuminance transducer, wireless vibration transducer, wireless door magnetic transducer, wireless humiture transducer, wireless carbon dioxide sensor, wireless carbon monoxide transducer etc.
The sensor power device of the embodiment of the present invention can be arranged with needing the sensor integration of powering, and the sensor power device in the embodiment of the present invention can utilize the radio frequency signal of collection from row cutting, without the need to providing driving voltage in addition.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a sensor power method, is characterized in that, comprising:
Radio frequency signal in pick-up transducers operational environment;
Rectification process is carried out to the described radio frequency signal gathered, obtains direct current signal;
Boosting process is carried out to described direct current signal, obtains output voltage and produce supply current simultaneously;
Control described supply current charging storage of electrical energy;
Utilize the electric energy of charging storage to sensor power;
Wherein, comprise for the energy-storage travelling wave tube of charging energy-storing the second capacity cell that the first capacity cell that an electric capacity is 450 ~ 500 microfarads and electric capacity are 1 ~ 3.5 farad;
Power management module for controlling described supply current charging energy-storing comprises controller and power control circuit;
Power control circuit comprises low and high level control CCO end, circuit switch controller, circuit changing switch Q1 and balancing component;
When power management module detects the magnitude of voltage of the first capacity cell output lower than 2.3V, power management module control CCO holds output low level, circuit changing switch Q1 turns off, first capacity cell C1 charging storage of electrical energy, when the magnitude of voltage on the first capacity cell is 2.3V, transducer is started working;
When power management module detects that the magnitude of voltage that the first capacity cell exports is more than or equal to 3.3V, power management module control CCO holds and exports high level, and circuit changing switch Q1 opens, the second capacity cell charging storage of electrical energy;
Power management module detects that the magnitude of voltage that the first capacity cell exports is more than or equal to 3.3V, and during voltage lower than the second capacity cell, the second capacity cell starts the first capacity cell quick charge;
When power management module detects that the magnitude of voltage that the first capacity cell exports is greater than 5V, power management module controls the first capacity cell and discharges.
2. method according to claim 1, is characterized in that, the frequency range of the described radio frequency signal of collection is 800MHz ~ 2.4GHz.
3. method according to claim 1, is characterized in that, the magnitude of voltage of described output voltage is 4.5 ~ 5 volts.
4. method according to claim 1, is characterized in that, described in obtain after output voltage produces supply current simultaneously, before described control described supply current charging storage of electrical energy, also comprising:
Ac filter is carried out to described supply current, obtains drive current.
5. method according to claim 1, is characterized in that, the described electric energy utilizing charging to store, to sensor power, comprising:
Detect the magnitude of voltage of the electric energy of charging storage, when the magnitude of voltage of the electric energy that charging stores is positioned at default safe voltage scope, utilize the electric energy of charging storage to sensor power;
During the minimum value of the magnitude of voltage of electric energy that charging stores lower than described safe voltage scope, cut off sensor power;
During the maximum of the magnitude of voltage of electric energy that charging stores higher than described safe voltage scope, the magnitude of voltage of the electric energy that electrical energy discharge charging stored stores to charging is positioned at described safe voltage scope.
6. method according to claim 5, is characterized in that, described safe voltage scope is 2.3 volts ~ 5 volts.
7. a sensor power device, is characterized in that, comprising: radio-frequency antenna, radio frequency rectification circuit, booster circuit, power management module and energy-storage travelling wave tube;
Described radio-frequency antenna, for the radio frequency signal in pick-up transducers operational environment;
Described radio frequency rectification circuit, for carrying out rectification process to the described radio frequency signal gathered, obtains direct current signal;
Described booster circuit, for carrying out boosting process to described direct current signal, obtains output voltage and produces supply current simultaneously;
Described power management module, for controlling described supply current to described energy-storage travelling wave tube charge storage electric energy;
Described energy-storage travelling wave tube, the electric energy stored for utilizing charging is to sensor power;
Wherein, described energy-storage travelling wave tube comprises the second capacity cell that the first capacity cell that an electric capacity is 450 ~ 500 microfarads and electric capacity are 1 ~ 3.5 farad;
Described power management module comprises controller and power control circuit;
Power control circuit comprises low and high level control CCO end, circuit switch controller, circuit changing switch Q1 and balancing component;
When power management module detects the magnitude of voltage of the first capacity cell output lower than 2.3V, power management module control CCO holds output low level, circuit changing switch Q1 turns off, first capacity cell C1 charging storage of electrical energy, when the magnitude of voltage on the first capacity cell is 2.3V, transducer is started working;
When power management module detects that the magnitude of voltage that the first capacity cell exports is more than or equal to 3.3V, power management module control CCO holds and exports high level, and circuit changing switch Q1 opens, the second capacity cell charging storage of electrical energy;
Power management module detects that the magnitude of voltage that the first capacity cell exports is more than or equal to 3.3V, and during voltage lower than the second capacity cell, the second capacity cell starts the first capacity cell quick charge;
When power management module detects that the magnitude of voltage that the first capacity cell exports is greater than 5V, power management module controls the first capacity cell and discharges.
8. sensor power device according to claim 7, is characterized in that, also comprise: ac filter circuit;
Described ac filter circuit, after output voltage produces supply current simultaneously for obtaining, before controlling described supply current charging storage of electrical energy, carries out ac filter to described supply current, obtains drive current.
9. sensor power device according to claim 7, is characterized in that, the model of the boost chip in described booster circuit is LTC3588-1.
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| CN108270298B (en) | 2017-01-04 | 2022-12-02 | 中兴通讯股份有限公司 | Charging method and device |
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| CN111130225B (en) * | 2019-11-28 | 2021-07-20 | 中国地质大学（武汉） | Low-current started micro-energy collection management system |
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