CN104266776A - Sensitive power-obtaining type temperature sensor based on acoustic surface waves - Google Patents
Sensitive power-obtaining type temperature sensor based on acoustic surface waves Download PDFInfo
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- CN104266776A CN104266776A CN201410593023.8A CN201410593023A CN104266776A CN 104266776 A CN104266776 A CN 104266776A CN 201410593023 A CN201410593023 A CN 201410593023A CN 104266776 A CN104266776 A CN 104266776A
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Abstract
The invention discloses a sensitive power-obtaining type temperature sensor based on acoustic surface waves, and solves the problem that a conventional temperature monitoring device is not complete. The sensitive power-obtaining type temperature sensor based on acoustic surface waves comprises a temperature acquisition terminal arranged on a line, wherein the temperature acquisition terminal is an acoustic surface wave temperature sensor specifically; the temperature acquisition terminal is connected with an analysis display terminal; the analysis display terminal is connected with a communication interface; the temperature acquisition terminal, the analysis display terminal and the communication interface are all connected with a power supply device; the power supply device comprises a sensitive power-obtaining device, a rectification voltage stabilizing circuit and a storage battery. The sensitive power-obtaining type temperature sensor ensures that an on-line monitoring device can continuously and stably monitor the state of main equipment, and the adverse influence of the reliability problem of the on-line monitoring device on the operation and maintenance of the main equipment is avoided; the sensor is has quite high safety, and is quite suitable for being operated in a high-voltage and strong electromagnetic environment.
Description
Technical field
The present invention relates to transformer station's temperature parameter sensing detection equipment, be specially a kind of induction energy fetching formula temperature sensor based on surface acoustic wave.
Background technology
Temperature is the important parameter characterizing electric power primary equipment normal operation.Especially primary equipment cut-off contact point, due to device fabrication, contact resistance is caused to increase by reasons such as environmental pollution, contact oxidation, electric arc impacts, operationally often constantly generate heat, temperature constantly rises, hide some dangers for equipment safety operation, if found not in time, easily cause on fire or blast, cause fortune to lose.In addition, along with the sustained and rapid development of Chinese national economy, electricity needs is sharp increase also, in order to meet need for electricity, cause the high-tension apparatus long-time running such as the switch of transformer station in ultimate limit state, running overload also can cause the heating of primary equipment and overheated, as: transformer substation switch, bus, conductor joint heating etc., this phenomenon seems particularly general in area faster in load growth.These situations, as monitored not in time, process in time, all uncertain major break down will occur.
Although on-Line Monitor Device is applied more and more in electrical network, but because a lot of device is very unripe technically, its operation stability is poor, function is also left to be desired, practical situations shows, the problems such as early stage monitoring device many existence design is unreasonable, principle is inaccurate, so detect for temperature sensing, need to consider new technology and new technology carries out Improvement and perfection, improve its stability and accuracy, guarantee the reliability in the sole mass of sensor vitals and in-site measurement, the effect of on-line monitoring could be improved.
Meanwhile, the sensing device of a large amount of on-line monitoring is disperseed application, and its power supply technique exists significant limitation, and according to powered battery, then battery originally exists potential safety hazard in high voltage and strong electromagnetic environment; Under limited battery electric quantity supply prerequisite, real-time property is poor; The maintenance cost of periodic replacement is huge; Respond to power taking according to CT, then respond to electricity getting device volume comparatively large, in narrow space, difficulty is installed; Complex installation process, the time cycle is long; The real-time change of bus current causes electric power system to occur impacting and damaging, and the electromagnetic interference (EMI) of transformer station's complexity also can directly cause circuit working abnormal simultaneously, the easy loss of temperature measuring equipment, and security, reliability are lower.
Summary of the invention
The present invention, in order to solve the incomplete problem of existing device for detecting temperature, provides a kind of induction energy fetching formula temperature sensor based on surface acoustic wave.
The present invention adopts following technical scheme to realize: based on the induction energy fetching formula temperature sensor of surface acoustic wave, comprise the temperature acquisition end be located on circuit, temperature acquisition end is specially SAW Temperature Sensors, temperature acquisition end is connected to analysis display end, analyze display end and connect communication interface, temperature acquisition end, analysis display end and communication interface are all connected to electric supply installation, and electric supply installation comprises induction energy fetching device, regulator rectifier circuit and accumulator.
Induction energy fetching device is electric field energy energy-collecting device, is to be placed in alternating electric field with plate condenser, and its two ends induce current/voltage, and electric field energy is converted to electric energy, power to load; This energy conversion, by an integrated low-loss rectifier and an efficient voltage reducing type converter, by collecting high-tension apparatus coupling energy, then becomes to export, for sensor, data processing and communication interface provide energy by regulator rectifier circuit; Temperature acquisition end is SAW Temperature Sensors, it is responsible for reception and inquires after radiofrequency signal, and be converted into surface acoustic wave and propagate along piezoelectric substrate, the resonance frequency affecting surface acoustic wave changed by measured (temperature) can change, thus returns the chip of transducing signal to temperature acquisition end of band temperature information; Analyze display end and the functions such as filtering, amplification, down coversion, transmission frequency control are provided, the signal of sensor collection is converted to the digital signal that can directly process; External communication interface can complete the data communication function of single device internal sensor to background acquisition controller, realizes the wireless security isolation between electrical equipment online supervision device height electronegative potential.
SAW Temperature Sensors adopts data acquisition and the transmission mode of passive and wireless, without the need to using battery, stube cable between high electronegative potential is not needed yet, therefore there is high security, be highly suitable at high pressure, work in strong electromagnetic environment, the analysis display end of sensor, the collection of temperature information is carried out in responsible unification, analyze, storage administration, temperature warning, data retransmission, optimum configurations and protocol conversion, the real-time displays temperature information of display window can not only be passed through, standard agreement such as IEC 61850 grade can also be supported, convenient, directly access background monitoring system.
Above-mentioned SAW Temperature Sensors and induction energy fetching device are existing product, and its circuit design and control mode are that those skilled in the art easily realize.
Beneficial effect of the present invention is as follows: the present invention utilizes surface acoustic wave temperature sensor technology and induction energy fetching technology to achieve passive and wireless temperature monitoring, the present invention is without the need to using any electronic devices and components, avoid because electronic component quality and life-span cause the problem that device functional reliability is low, its serviceable life can the life-span same with monitored equipment.Both ensured that on-Line Monitor Device was sustainable and stable status monitoring had been carried out to main equipment, it also avoid because on-Line Monitor Device integrity problem produces harmful effect to the operation maintenance of main equipment simultaneously, there is high security, be highly suitable for working in high pressure, strong electromagnetic environment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
In figure: 1-temperature acquisition end, 2-analyzes display end, 3-communication interface, 4-induction energy fetching device, 5-regulator rectifier circuit, 6-accumulator.
Embodiment
Based on the induction energy fetching formula temperature sensor of surface acoustic wave, comprise the temperature acquisition end 1 be located on circuit, temperature acquisition end 1 is specially SAW Temperature Sensors, temperature acquisition end 1 is connected to analyzes display end 2, analyze display end 2 and connect communication interface 3, temperature acquisition end 1, analysis display end 2 and communication interface 3 are all connected to electric supply installation, and electric supply installation comprises induction energy fetching device 4, regulator rectifier circuit 5 and accumulator 6.
Surface acoustic wave passive sensing technology, realize high_voltage isolation, security is high; Passive temperature sensor bulk is little, and between collector, data wireless transmits, flexibly easy for installation, not by device structure and spacial influence; Sensor without the need to using battery, basic Maintenance free after successful installation; Temperature measuring equipment, can long-term stable operation not by the such environmental effects such as dust, electromagnetic field; Radio frequency signal has and certain penetrates diffracting power, can be widely used in the various object temperatures measured in visual range and there is barrier; Passive working method is not by energy limited, and frequency that can be higher carries out the collection of temperature information, and real-time property is high.
Induction energy fetching technology is applied in sensing device, on the one hand, decrease complexity and the degree of difficulty of supply source, can make rational use of resources, on the other hand, rectifier is added in the power supply unit of induction energy fetching, reducing transformer, accumulator and mu balanced circuit, can effectively avoid transmission line of electricity to get under big current can to absorb energy surplus and scaling loss power circuit by unit, reduce the thermal value of power supply, and unnecessary absorbing energy effectively is stored, and can avoid transmission line of electricity electric current be small area analysis or power-off when cause the electricity shortage of monitoring equipment, ensure that draw-out power supply can to the direct current of monitoring equipment stable output, ensure that monitoring equipment lasting stability is run, and it is saturated to prevent getting energy unit, and enables to get and can send momentary high power by unit, strengthen draw-out power supply carrying load ability and adaptive faculty.
The energy acquisition design of sensing device, the control design case of power amplification design and accumulator cell charging and discharging; Wherein, energy acquisition due to device is by an integrated low-loss, rectifier and an efficient voltage reducing type converter, energy acquisition module for directly to voltage waveform rectification and store gathered energy and design in an external storage capacitor, consumes any too much power by an internal parallel voltage stabilizer simultaneously.Power-amplifier front-end is voltage amplifier, and OTL circuit is by front end input signal, and rear end is output signal.Charge and discharge control adopts the circuit be made up of IGBT to produce high-power sinusoidal signal, this signal is after step-up transformer boosting and high-pressure series resonant circuit are amplified, electric pressure can reach high pressure, UHV (ultra-high voltage), extra-high voltage rank, frequency control is primarily of the uncontrollable rectification circuit of three-phase, H-bridge inverter circuit, output filter, series resonant circuit forms.
Claims (1)
1. the induction energy fetching formula temperature sensor based on surface acoustic wave, it is characterized in that: comprise the temperature acquisition end (1) be located on circuit, temperature acquisition end (1) is specially SAW Temperature Sensors, temperature acquisition end (1) is connected to analyzes display end (2), analyze display end (2) and connect communication interface (3), temperature acquisition end (1), analysis display end (2) and communication interface (3) are all connected to electric supply installation, and electric supply installation comprises induction energy fetching device (4), regulator rectifier circuit (5) and accumulator (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410593023.8A CN104266776A (en) | 2014-10-30 | 2014-10-30 | Sensitive power-obtaining type temperature sensor based on acoustic surface waves |
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| CN201410593023.8A CN104266776A (en) | 2014-10-30 | 2014-10-30 | Sensitive power-obtaining type temperature sensor based on acoustic surface waves |
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| CN104266776A true CN104266776A (en) | 2015-01-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596668A (en) * | 2015-01-28 | 2015-05-06 | 国家电网公司 | Surface acoustic wave based distribution transformer temperature on-line monitoring system |
| CN104751298A (en) * | 2015-04-21 | 2015-07-01 | 国网河南省电力公司驻马店供电公司 | Iris algorithm based electric power security information identification and intelligent management system |
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| WO2001000446A1 (en) * | 1999-06-25 | 2001-01-04 | Suma Investment Holding | Power unit for managing a vehicle flashers |
| JP2010026838A (en) * | 2008-07-22 | 2010-02-04 | Toshiba Lighting & Technology Corp | Wireless sensor |
| CN102519649A (en) * | 2011-12-19 | 2012-06-27 | 西安宝德自动化股份有限公司 | Oil pumping machine load sensing device |
| CN203455936U (en) * | 2013-08-16 | 2014-02-26 | 施国良 | Passive wireless temperature rise monitoring device |
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2014
- 2014-10-30 CN CN201410593023.8A patent/CN104266776A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001000446A1 (en) * | 1999-06-25 | 2001-01-04 | Suma Investment Holding | Power unit for managing a vehicle flashers |
| JP2010026838A (en) * | 2008-07-22 | 2010-02-04 | Toshiba Lighting & Technology Corp | Wireless sensor |
| CN102519649A (en) * | 2011-12-19 | 2012-06-27 | 西安宝德自动化股份有限公司 | Oil pumping machine load sensing device |
| CN203455936U (en) * | 2013-08-16 | 2014-02-26 | 施国良 | Passive wireless temperature rise monitoring device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596668A (en) * | 2015-01-28 | 2015-05-06 | 国家电网公司 | Surface acoustic wave based distribution transformer temperature on-line monitoring system |
| CN104596668B (en) * | 2015-01-28 | 2017-09-15 | 国家电网公司 | A kind of distribution transformer temperature online monitoring system based on surface acoustic wave |
| CN104751298A (en) * | 2015-04-21 | 2015-07-01 | 国网河南省电力公司驻马店供电公司 | Iris algorithm based electric power security information identification and intelligent management system |
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Application publication date: 20150107 |