CN105471006A - Sensor power management circuit - Google Patents
Sensor power management circuit Download PDFInfo
- Publication number
- CN105471006A CN105471006A CN201410435787.4A CN201410435787A CN105471006A CN 105471006 A CN105471006 A CN 105471006A CN 201410435787 A CN201410435787 A CN 201410435787A CN 105471006 A CN105471006 A CN 105471006A
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- circuit
- management circuit
- power management
- controller
- converter
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- Y02B60/50—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention belongs to the electrics field and specially relates to a sensor power management circuit. The invention provides an electromagnetic energy acquisition power management circuit. By improving working frequency of the circuit and reducing resonant capacitance, the high-quality-factor management circuit is allowed to have high output power and energy acquisition efficiency. The sensor power management circuit comprises an up-conversion match circuit, an A/D converter, an energy storage circuit, an amplifier, a controller, a voltage stabilizer, a signal processor, a radio communication device, a temperature sensor and a wireless transmit-receive node. The sensor power management circuit has the following structure main points: the input port of the controller is connected with the up-conversion match circuit, the amplifier, the signal processor and the radio communication device; the output port of the controller is connected with the A/D converter, the temperature sensor and the wireless transmit-receive node; the output port of the A/D converter is connected with the energy storage circuit; and the energy storage circuit is connected with the voltage stabilizer.
Description
Technical field
the invention belongs to electricity field, particularly relate to a kind of sensor power supply management circuit.
Background technology
in recent years, the demand of people to large power-consuming equipment constantly increases, and the electric fire caused because electricity consumption is excessive happens occasionally, and therefore becomes particularly important to the monitoring of electric wire state.The battery that traditional method adopts is powered to wireless senser, but the self-contained finite energy of battery, can not meet the demand of long-term work, in the occasion that harsh and unforgiving environments or the mankind cannot arrive, battery altering is very difficult.In Electrical Safety monitoring, wire current, temperature are the major parameters needing to gather and observe, data acquisition and the transmission of transducer need power supply, gather the energy of electromagnetic field of alternation around electric wire with electromagnetic type coil transducer and be converted to electric energy, launch for the sensing of wireless senser and data and power supply is provided, independently can realize Electrical Safety monitoring.Because the power output of small size coil transducer cannot normally work by Direct driver wireless sensor node, electric power management circuit is therefore needed to store the electric energy collected and discharge.The power conversion gathered in environment is electric energy, realizes the self energizing of wireless senser, effectively can solve the problem of battery altering difficulty.At present, the environmental energy that self energizing technology generally adopts has solar energy, wind energy, mechanical energy, electromagnetic energy etc., and external electromagnetic field is prevalent in each corner natural, is the potential energy source of self-power wireless transducer.Traditional electric power management circuit adopts bridge rectifier and control circuit to combine, and stores electric energy; Match circuit and voltage-multiplying circuit is adopted to make the output voltage of management circuit reach the rated operational voltage of wireless sensing node; A kind of adaptive algorithm adjustment transducer duty ratio is proposed to improve the power output of energy acquisition management circuit.But by the restriction of transducer winding inductance volume, the management circuit quality factor of conventional method are very low, in light current magnetic energy density environments, the power output of circuit is not enough to drive wireless sensing node normally to work.
Summary of the invention
the present invention is exactly for the problems referred to above, provides a kind of electromagnetic energy to gather electric power management circuit.By improving the operating frequency of circuit, reducing resonant capacitance, making the management circuit of high quality factor have a kind of sensor power supply management circuit of high power output and energy acquisition efficiency.
for achieving the above object, the present invention adopts following technical scheme, the present invention includes up-conversion match circuit, A/D converter, accumulator, amplifier, controller, pressurizer, signal processor, radio communication device, temperature sensor, wireless receiving and dispatching node, its structural feature is: the input port of controller is connected with up-conversion match circuit, amplifier, signal processor, radio communication device, and the output port of controller is connected with A/D converter, temperature sensor, wireless receiving and dispatching node; The output port of A/D converter is connected with accumulator, accumulator is also connected with pressurizer.
as a preferred embodiment of the present invention, described controller is single-chip microcomputer.
beneficial effect of the present invention.
in light current magnetic field excitation situation of the present invention, be stored in energy shortage in super capacitor to drive the problem from the work of full formula intelligent sensor of small size, devise a kind of up-conversion electric power management circuit, improve the charge power of super capacitor.Reduce resonant capacitance value by the operating frequency improving circuit, increase the quality factor of circuit, make circuit produce higher power output in faint environmental energy, improve energy acquisition efficiency.Experiment shows, when the alternating current of the 1A that circulates in electric wire, gathers electric wire peripheral electromagnetic field energy, make the management circuit of high quality factor have high power output and energy acquisition efficiency with coil.
Accompanying drawing explanation
fig. 1 is circuit theory diagrams of the present invention.
Embodiment
as shown in the figure, the present invention includes up-conversion match circuit, A/D converter, accumulator, amplifier, controller, pressurizer, signal processor, radio communication device, temperature sensor, wireless receiving and dispatching node, its structural feature is: the input port of controller is connected with up-conversion match circuit, amplifier, signal processor, radio communication device, and the output port of controller is connected with A/D converter, temperature sensor, wireless receiving and dispatching node; The output port of A/D converter is connected with accumulator, accumulator is also connected with pressurizer.
described controller is single-chip microcomputer.
small size, the gathering the energy of electromagnetic field of alternation around electric wire from full formula Intelligent Sensing System coil transducer and electromagnetic energy is converted to electric energy of low-power consumption, realize storage and the release of electric energy through electric power management circuit.When super capacitor energy accumulation in accumulator to a certain extent, control circuit starts voltage-stabilizing output circuit makes super capacitor discharge, drives wireless receiving and dispatching node to work.The wire current that transducer collects by wireless receiving and dispatching node, temperature parameter are sent to host node.Gathering electric wire peripheral electromagnetic field energy with coil and be converted to electric energy, is that wireless sensing node is powered through management circuit.Traditional coil transducer is made up of magnetic core and coiling enamelled wire thereon, when circulate in electric wire alternating current time, the coil be enclosed within around electric wire can be experienced the magnetic field of alternation and export electric energy.The output voltage of coil transducer is directly proportional to the number of turn and wire current.At low currents, electric wire peripheral electromagnetic field energy density is lower, and in order to increase the output voltage of coil, conventional method adopts increase coil turn to realize, but is unfavorable for the miniaturization of transducer.Transducer electric power management circuit improving, by improving the quality factor of management circuit, circuit can be made to produce higher power output.
in order to improve the operating frequency of circuit, propose up-conversion match circuit.Match circuit is made up of transformer, bidirectional switch and matching capacitance.According to the perceptual output characteristic of coil, at coil secondary side coiling two windings, dual coil electromagnetic energy collecting device can be formed, also become the transformer of match circuit simultaneously.
electric power management circuit is made up of up-conversion match circuit, AC/DC rectification circuit, energy storage circuit, control circuit and voltage-stabilizing output circuit.The working condition of management circuit is: circuit rectification after frequency up-converted, coupling exports, by power storage in super capacitor.When super capacitor both end voltage reaches pre-determined threshold voltage, control circuit starts voltage stabilizing circuit work, will be stored in the fault offset in super capacitor, drives the work of wireless receiving and dispatching node.
Claims (2)
1. a sensor power supply management circuit, comprise up-conversion match circuit, A/D converter, accumulator, amplifier, controller, pressurizer, signal processor, radio communication device, temperature sensor, wireless receiving and dispatching node, it is characterized in that: the input port of controller is connected with up-conversion match circuit, amplifier, signal processor, radio communication device, the output port of controller is connected with A/D converter, temperature sensor, wireless receiving and dispatching node; The output port of A/D converter is connected with accumulator, accumulator is also connected with pressurizer.
2. a kind of sensor power supply management circuit according to claim 1, is characterized in that: described controller is single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410435787.4A CN105471006A (en) | 2014-08-31 | 2014-08-31 | Sensor power management circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410435787.4A CN105471006A (en) | 2014-08-31 | 2014-08-31 | Sensor power management circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105471006A true CN105471006A (en) | 2016-04-06 |
Family
ID=55608450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410435787.4A Pending CN105471006A (en) | 2014-08-31 | 2014-08-31 | Sensor power management circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105471006A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196422A (en) * | 2017-06-27 | 2017-09-22 | 清华大学 | Nonlinear resonance formula magnetic field energy harvester based on electromagnetic induction principle |
-
2014
- 2014-08-31 CN CN201410435787.4A patent/CN105471006A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196422A (en) * | 2017-06-27 | 2017-09-22 | 清华大学 | Nonlinear resonance formula magnetic field energy harvester based on electromagnetic induction principle |
| CN107196422B (en) * | 2017-06-27 | 2021-02-23 | 清华大学 | Nonlinear resonant magnetic field energy acquisition device based on electromagnetic induction principle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160406 |